diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..91e4d97
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,12 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{yml,yaml}]
+indent_size = 2
diff --git a/.eslintrc.js b/.eslintrc.js
index 2a3e522..c7b177d 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -3,13 +3,9 @@ module.exports = {
     commonjs: true,
     node: true,
   },
-  extends: ['@parcellab/eslint-config/base'],
+  extends: ['@parcellab/eslint-config/base', 'prettier'],
   rules: {
-    'comma-dangle': ['error', 'always-multiline'],
     'prefer-const': 'error',
-    'quote-props': ['error', 'consistent-as-needed'],
-    'quotes': ['error', 'single'],
-    'semi': ['error', 'always'],
     'unicorn/prefer-module': 'off',
   },
 };
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 55681a9..a6e6569 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,5 +21,6 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm ci
+      - run: npm run format:check
       - run: npm run build --if-present
       - run: npm test
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..0f528ff
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,7 @@
+node_modules
+package-lock.json
+
+# Generated/large data files: keep existing formatting to avoid noisy diffs.
+country/**/*.json
+regionNames/**/*.json
+regions/**/*.json
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..9955296
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,15 @@
+{
+  "singleQuote": true,
+  "semi": true,
+  "trailingComma": "all",
+  "quoteProps": "consistent",
+  "printWidth": 100,
+  "overrides": [
+    {
+      "files": ["*.yml", "*.yaml"],
+      "options": {
+        "singleQuote": false
+      }
+    }
+  ]
+}
diff --git a/DATA_REQUIREMENTS.md b/DATA_REQUIREMENTS.md
index 0e5f18f..37b4cc3 100644
--- a/DATA_REQUIREMENTS.md
+++ b/DATA_REQUIREMENTS.md
@@ -1,18 +1,23 @@
 # Country Data Requirements
+
 Guide for adding a new country to the static Region Identifier dataset. Each supported country needs three JSON files plus a small code change.
 
 ## 1) Country config – `country/ISO3.json`
+
 - Keys:
   - `zipCodeFormat`: `"numeric"` or `"alpha"`.
   - `zipCodeLength`: integer, required for numeric formats to pad/compare values (USA=5, AUS=4, DEU=5, etc.). Omit for alpha formats (CAN/GBR/NLD).
 - Example:
+
 ```json
 { "zipCodeFormat": "numeric", "zipCodeLength": 5 }
 ```
 
 ## 2) Region names – `regionNames/ISO3.json`
+
 - Plain object mapping ISO 3166-2 region codes (same codes used in `regions/*.json`) to display names in English.
 - Example (`regionNames/AUS.json`):
+
 ```json
 {
   "AU-NSW": "New South Wales",
@@ -21,11 +26,15 @@ Guide for adding a new country to the static Region Identifier dataset. Each sup
 ```
 
 ## 3) Region mappings – `regions/ISO3.json`
+
 Array of objects that map postal codes to ISO 3166-2 region codes. Formats already used in the repo:
+
 - **Numeric intervals** (inclusive): objects with `low`, `high`, `region`. Values can be numbers or numeric strings if leading zeros matter. Example (`regions/AUS.json`):
+
 ```json
 { "region": "AU-NSW", "low": 1000, "high": 1999 }
 ```
+
 - **Explicit codes**: objects with `low`, `region`, no `high`. Every postal code (or prefix) must be listed. Use strings to preserve zeros. Examples:
   - Belgium lists every 4-digit code (`regions/BEL.json`).
   - Spain lists 5-digit codes as strings (`regions/ESP.json`).
@@ -34,20 +43,24 @@ Array of objects that map postal codes to ISO 3166-2 region codes. Formats alrea
 - **Discrete lists**: objects with `region` and `list` (array of codes). Numeric countries store numbers; matching uses `zipCodeLength` to pad leading zeros before comparison. Examples: USA (`list` of 5-digit numbers), RUS (per-region lists).
 
 Additional format notes:
+
 - Files can mix formats if needed. Order matters because the lookup stops at the first match.
 - Intervals and lists are treated as inclusive ranges; for alpha codes only exact equality is used.
 - Keep codes as strings when leading zeros are significant.
 
 ## 4) Code wiring
+
 - Add the ISO3 code to `availableCountries` in `lib/region.js`; otherwise the static data is ignored and Google is used.
 - If the country needs custom postal-code normalization, extend `validateZipCode` (see existing cases for GBR, CAN, NLD, MEX).
 
 ## 5) Testing
+
 - Add test cases to `test/tests.js` under `countriesPostalCodes`: include the country ISO/name, a representative zip, expected region code, and set `usingGoogle: false`.
 - Run `npm test` to execute the Node.js test runner.
 - Optional: verify pretty-name lookups via `getNameFromCountryAndRegion` using the `regionNames` file.
 
 ## 6) Data quality checklist
+
 - Region codes must be valid ISO 3166-2 for the country.
 - `regionNames` should be English and cover every region code present in `regions/ISO3.json`.
 - Postal-code coverage should include territories and edge prefixes (e.g., US territories, Canadian northern prefixes).
diff --git a/README.md b/README.md
index ad81de4..69d4b2f 100644
--- a/README.md
+++ b/README.md
@@ -2,12 +2,14 @@
 
 Utility module that provides an easy way to identify the region of the country depending on the postal code, brings a set of determined regions for some of the countries and if it doesn't find a match uses google geolocation API to get the region.
 
-*Relevant links:*
-* https://en.wikipedia.org/wiki/ISO_3166-2 — codes used for all the regions can be found here
-* https://en.wikipedia.org/wiki/Category:Postal_codes_by_country - explanations of postal code structure per country
-* https://download.geonames.org/export/zip/ - all the Geoname files for download (see below)
+_Relevant links:_
+
+- https://en.wikipedia.org/wiki/ISO_3166-2 — codes used for all the regions can be found here
+- https://en.wikipedia.org/wiki/Category:Postal_codes_by_country - explanations of postal code structure per country
+- https://download.geonames.org/export/zip/ - all the Geoname files for download (see below)
 
 #### Predefined Regions
+
 - AUS
 - AUT
 - BRA
@@ -39,22 +41,27 @@ Utility module that provides an easy way to identify the region of the country d
 - USA
 
 ## Test
+
 ```sh
 $ npm test
 ```
 
 ### License
+
 This module was built using adapted information from http://download.geonames.org/ that's registered under the **CC BY 3.0** as well as this module.
 Link to more information about **CC BY 3.0** http://creativecommons.org/licenses/by/3.0/.
 
 ## Usage
 
 #### Basic:
+
 ```javascript
 const { RegionIdentifier } = requrie('regionIdentifier');
 const identifier = new RegionIdentifier('<GOOGLE API KEY>');
 ```
+
 #### Get region:
+
 ```javascript
 //Using country name
 identifier.get('Deutschland', '6578')
diff --git a/lib/region.js b/lib/region.js
index ce94442..3173c62 100644
--- a/lib/region.js
+++ b/lib/region.js
@@ -172,19 +172,13 @@ function getRegionByZipCodeOnStaticFiles(countryIso, zip) {
       (regionMapping.list.includes(parseInt(zip)) ||
         (countryConfig.zipCodeFormat === 'numeric'
           ? regionMapping.list.some((l) =>
-              zip.startsWith(
-                String(l).padStart(countryConfig.zipCodeLength, '0'),
-              ),
+              zip.startsWith(String(l).padStart(countryConfig.zipCodeLength, '0')),
             )
           : false))
     ) {
       return regionMapping.region;
-    } else if (!regionMapping.high && zip === regionMapping.low)
-      return regionMapping.region;
-    else if (
-      parseInt(zip) >= regionMapping.low &&
-      parseInt(zip) <= regionMapping.high
-    )
+    } else if (!regionMapping.high && zip === regionMapping.low) return regionMapping.region;
+    else if (parseInt(zip) >= regionMapping.low && parseInt(zip) <= regionMapping.high)
       return regionMapping.region;
   }
 }
@@ -293,34 +287,30 @@ class RegionIdentifier {
     let response;
 
     try {
-      response = await axios.get(
-        googleLink.replace('####', encodeURIComponent(param)),
-      );
+      response = await axios.get(googleLink.replace('####', encodeURIComponent(param)));
     } catch (err) {
       throw new GoogleMapsAPIError('Google Maps API request failed: ' + JSON.stringify(err));
     }
 
-      if (!response?.data) {
-        return null;
-      }
+    if (!response?.data) {
+      return null;
+    }
 
-      if (response.data?.results?.length <= 0) {
-        return null;
-      }
+    if (response.data?.results?.length <= 0) {
+      return null;
+    }
 
-      // find country inside of the nested array
-      const region = response.data.results[0].address_components.find((component) => {
-        const typeFound = component.types.find(
-          (type) => type === 'administrative_area_level_1',
-        );
-        return typeFound && typeFound.length > 0;
-      });
+    // find country inside of the nested array
+    const region = response.data.results[0].address_components.find((component) => {
+      const typeFound = component.types.find((type) => type === 'administrative_area_level_1');
+      return typeFound && typeFound.length > 0;
+    });
 
-      if (!region) {
-        throw new GoogleMapsAPIError('NOT FOUND');
-      }
+    if (!region) {
+      throw new GoogleMapsAPIError('NOT FOUND');
+    }
 
-      return `${countryIso.alpha2}-${cleanAndCatchFaultyRegionName(region)}`;
+    return `${countryIso.alpha2}-${cleanAndCatchFaultyRegionName(region)}`;
   }
 }
 
diff --git a/package-lock.json b/package-lock.json
index 40ca9fe..a1fce1c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,8 +14,10 @@
       },
       "devDependencies": {
         "@parcellab/eslint-config": "^0.5.5",
+        "eslint-config-prettier": "^10.1.8",
         "eslint-plugin-import": "^2.32.0",
-        "eslint-plugin-promise": "^7.3.0"
+        "eslint-plugin-promise": "^7.3.0",
+        "prettier": "^3.9.4"
       },
       "engines": {
         "node": ">=24.0.0"
@@ -1724,7 +1726,6 @@
       "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "bin": {
         "eslint-config-prettier": "bin/cli.js"
       },
@@ -3925,12 +3926,11 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.8.3",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.3.tgz",
-      "integrity": "sha512-7igPTM53cGHMW8xWuVTydi2KO233VFiTNyF5hLJqpilHfmn8C8gPf+PS7dUT64YcXFbiMGZxS9pCSxL/Dxm/Jw==",
+      "version": "3.9.4",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.9.4.tgz",
+      "integrity": "sha512-yWG/o/4oJfo036EKAfK6ACAoDOfHeRHx4tuxkfBZiauURiaSmYwlpOr5LQqKtIkRD2z1PLteme2WoxEnj4tHTg==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
diff --git a/package.json b/package.json
index d57a907..b9f3c06 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,9 @@
   "homepage": "https://github.com/parcelLab/regionIdentifier",
   "scripts": {
     "test": "node --test test/tests.js",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "format": "prettier --write .",
+    "format:check": "prettier --check ."
   },
   "engines": {
     "node": ">=24.0.0"
@@ -30,8 +32,10 @@
   },
   "devDependencies": {
     "@parcellab/eslint-config": "^0.5.5",
+    "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.32.0",
-    "eslint-plugin-promise": "^7.3.0"
+    "eslint-plugin-promise": "^7.3.0",
+    "prettier": "^3.9.4"
   },
   "overrides": {
     "eslint-plugin-unicorn": "47.0.0",
diff --git a/test/resolve.js b/test/resolve.js
index a5c4c90..6993b3e 100644
--- a/test/resolve.js
+++ b/test/resolve.js
@@ -18,7 +18,7 @@ identifier
   .catch((err) => {
     console.error(err);
 
-    if(err instanceof GoogleMapsAPIError) {
+    if (err instanceof GoogleMapsAPIError) {
       console.error('Google Maps API error');
     }
   });
diff --git a/test/tests.js b/test/tests.js
index 457288f..310a7a9 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -6,439 +6,548 @@ const RegionIdentifier = require('../lib/region');
 const identifier = new RegionIdentifier('<API KEY>');
 
 const countriesPostalCodes = {
-  'Austria': [{
-    name: 'AUT',
-    zip: '1999',
-    result: 'AT-9',
-    usingGoogle: false,
-  }, {
-    name: 'Austria',
-    usingGoogle: false,
-    zip: '1999',
-    result: 'AT-9',
-  }],
-  'Deutschland': [{
-    name: 'DEU',
-    zip: '6578',
-    result: 'DE-TH',
-    usingGoogle: false,
-  }],
-  'Belgium': [{
-    name: 'BEL',
-    zip: '1701',
-    result: 'BE-VLG',
-    usingGoogle: false,
-  }],
-  'Switzerland': [{
-    name: 'CHE',
-    zip: '2333',
-    result: 'CH-BE',
-    usingGoogle: false,
-  }, {
-    name: 'CHE',
-    zip: '9488',
-    result: 'CH-SG',
-    usingGoogle: false,
-  }],
-  'Spain': [{
-    name: 'ESP',
-    zip: '04004',
-    result: 'ES-AN',
-    usingGoogle: false,
-  }],
-  'France': [{
-    name: 'FRA',
-    zip: '25090',
-    result: 'FR-I',
-    usingGoogle: false,
-  }, {
-    name: 'FRA',
-    zip: '92440',
-    result: 'FR-J',
-    usingGoogle: false,
-  }, {
-    name: 'FRA',
-    zip: '75116',
-    result: 'FR-J',
-    usingGoogle: false,
-  }, {
-    name: 'FRA',
-    zip: '51000',
-    result: 'FR-G',
-    usingGoogle: false,
-  }, {
-    name: 'FRA',
-    zip: '51100',
-    result: 'FR-G',
-    usingGoogle: false,
-  }, {
-    name: 'FRA',
-    zip: '75020',
-    result: 'FR-J',
-    usingGoogle: false,
-  }, {
-    name: 'FR',
-    zip: '25090',
-    result: 'FR-I',
-    usingGoogle: false,
-  }, {
-    name: 'FR',
-    zip: '87200',
-    result: 'FR-L',
-    usingGoogle: false,
-  }, {
-    name: 'FR',
-    zip: '87200 CEDEX 1',
-    result: 'FR-L',
-    usingGoogle: false,
-  }, {
-    name: 'FR',
-    zip: '61100',
-    result: 'FR-P',
-    usingGoogle: false,
-  }, {
-    name: 'FR',
-    zip: '81000',
-    result: 'FR-N',
-    usingGoogle: false,
-  }],
-  'United Kingdom': [{
-    name: 'GBR',
-    zip: 'PA13 4PS',
-    result: 'GB-SCT',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'EC2N 1AR',
-    result: 'GB-ENG',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'FY83QN',
-    result: 'GB-ENG',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'CF466RT',
-    result: 'GB-WLS',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'AL10 9BL',
-    result: 'GB-ENG',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'm14 5pq',
-    result: 'GB-ENG',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'Po10 8Eg',
-    result: 'GB-ENG',
-    usingGoogle: false,
-  }, {
-    name: 'GBR',
-    zip: 'L5 3QN',
-    result: 'GB-ENG',
-    usingGoogle: false,
-  }],
-  'Italy': [{
-    name: 'ITA',
-    zip: '67033',
-    result: 'IT-65',
-    usingGoogle: false,
-  }, {
-    name: 'ITA',
-    zip: '41121',
-    result: 'IT-45',
-    usingGoogle: false,
-  }],
-  'India': [{
-    name: 'IND',
-    zip: '110001',
-    result: 'IN-DL',
-    usingGoogle: false,
-  }],
-  'Ireland': [{
-    name: 'IRL',
-    zip: 'D02 X285',
-    result: 'IE-L',
-    usingGoogle: false,
-  }],
-  'Romania': [{
-    name: 'ROU',
-    zip: '010011',
-    result: 'RO-B',
-    usingGoogle: false,
-  }],
-  'Hungary': [{
-    name: 'HUN',
-    zip: '1011',
-    result: 'HU-BU',
-    usingGoogle: false,
-  }],
-  'Japan': [{
-    name: 'JPN',
-    zip: '100-0001',
-    result: 'JP-13',
-    usingGoogle: false,
-  }, {
-    name: 'JPN',
-    zip: '530-0001',
-    result: 'JP-27',
-    usingGoogle: false,
-  }],
-  'Brazil': [{
-    name: 'BRA',
-    zip: '69900-000',
-    result: 'BR-AC',
-    usingGoogle: false,
-  }],
-  'South Korea': [{
-    name: 'KOR',
-    zip: '01000',
-    result: 'KR-11',
-    usingGoogle: false,
-  }],
-  'Lithuania': [{
-    name: 'LTU',
-    zip: '62001',
-    result: 'LT-03',
-    usingGoogle: false,
-  }],
-  'Luxembourg': [{
-    name: 'LUX',
-    zip: 'L-4795',
-    result: 'LU-CA',
-    usingGoogle: false,
-  }],
-  'Portugal': [{
-    name: 'PRT',
-    zip: '3020-740',
-    result: 'PT-01',
-    usingGoogle: false,
-  }],
-  'Slovakia': [{
-    name: 'SVK',
-    zip: '049 01',
-    result: 'SK-BC',
-    usingGoogle: false,
-  }],
-  'Turkey': [{
-    name: 'TUR',
-    zip: '01010',
-    result: 'TR-01',
-    usingGoogle: false,
-  }],
-  'Netherlands': [{
-    name: 'NLD',
-    zip: '3541',
-    result: 'NL-UT',
-    usingGoogle: false,
-  }, {
-    name: 'NLD',
-    zip: '6869 VC',
-    result: 'NL-GE',
-    usingGoogle: false,
-  }, {
-    name: 'NLD',
-    zip: '2294 HC',
-    result: 'NL-ZH',
-    usingGoogle: false,
-  }, {
-    name: 'NLD',
-    zip: '2294HC',
-    result: 'NL-ZH',
-    usingGoogle: false,
-  }],
-  'Canada': [{
-    name: 'CAN',
-    zip: 'X1A 0E2',
-    result: 'CA-NT',
-    usingGoogle: false,
-  }, {
-    name: 'CAN',
-    zip: 'X1A 0E2',
-    result: 'CA-NT',
-    usingGoogle: false,
-  }, {
-    name: 'CAN',
-    zip: 'X1A0E2',
-    result: 'CA-NT',
-    usingGoogle: false,
-  }, {
-    name: 'CAN',
-    zip: 'G1P 2J1',
-    result: 'CA-QC',
-    usingGoogle: false,
-  }, {
-    name: 'CAN',
-    zip: 'S0J 0G0',
-    result: 'CA-SK',
-    usingGoogle: false,
-  }],
-  'Mexico': [{
-    name: 'MEX',
-    zip: '06000',
-    result: 'MX-CMX',
-    usingGoogle: false,
-  }],
-  'Serbia': [{
-    name: 'SRB',
-    zip: '11000',
-    result: 'RS-00',
-    usingGoogle: false,
-  }, {
-    name: 'SRB',
-    zip: '11320',
-    result: 'RS-10',
-    usingGoogle: false,
-  }, {
-    name: 'SRB',
-    zip: '18230',
-    result: 'RS-15',
-    usingGoogle: false,
-  }, {
-    name: 'SRB',
-    zip: '24430',
-    result: 'RS-03',
-    usingGoogle: false,
-  }, {
-    name: 'SRB',
-    zip: '21000',
-    result: 'RS-VO',
-    usingGoogle: false,
-  }, {
-    name: 'SRB',
-    zip: '38000',
-    result: 'RS-KM',
-    usingGoogle: false,
-  }],
-  'United States': [{
-    name: 'USA',
-    zip: '972022239',
-    result: 'US-OR',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '06103',
-    result: 'US-CT',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '00646',
-    result: 'US-PR',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '96799',
-    result: 'US-AS',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '96921',
-    result: 'US-GU',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '96951',
-    result: 'US-MP',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '00831',
-    result: 'US-VI',
-    usingGoogle: false,
-  }, {
-    name: 'USA',
-    zip: '10038',
-    result: 'US-NY',
-    usingGoogle: false,
-  }],
-  'Qatar': [{
-    name: 'QAT',
-    zip: '06000',
-    result: null,
-    usingGoogle: false,
-  }],
-  'Sweden': [{
-    name: 'SWE',
-    zip: '11337',
-    result: 'SE-AB',
-    usingGoogle: false,
-  },{
-    name: 'SWE',
-    zip: '95435',
-    result: 'SE-BD',
-    usingGoogle: false,
-  },{
-    name: 'SWE',
-    zip: '23531',
-    result: 'SE-M',
-    usingGoogle: false,
-  },{
-    name: 'SWE',
-    zip: '10000',
-    result: 'SE-AB',
-    usingGoogle: false,
-  },{
-    name: 'SWE',
-    zip: '99999',
-    result: 'SE-BD',
-    usingGoogle: false,
-  },{
-    name: 'SWE',
-    zip: '81999',
-    result: 'SE-C',
-    usingGoogle: false,
-  }],
-  'Finland': [{
-    name: 'FIN',
-    zip: '00940',
-    result: 'FI-18',
-    usingGoogle: false,
-  },{
-    name: 'FIN',
-    zip: '70840',
-    result: 'FI-15',
-    usingGoogle: false,
-  },{
-    name: 'FIN',
-    zip: '96900',
-    result: 'FI-10',
-    usingGoogle: false,
-  },{
-    name: 'FIN',
-    zip: '00100',
-    result: 'FI-18',
-    usingGoogle: false,
-  },{
-    name: 'FIN',
-    zip: '99990',
-    result: 'FI-10',
-    usingGoogle: false,
-  },{
-    name: 'FIN',
-    zip: '20200',
-    result: 'FI-19',
-    usingGoogle: false,
-  },{
-    name: 'FIN',
-    zip: '22100',
-    result: 'FI-01',
-    usingGoogle: false,
-  },{
-    name: 'AUS',
-    zip: '0841',
-    result: 'AU-NT',
-    usingGoogle: false,
-  },{
-    name: 'AUS',
-    zip: '2111',
-    result: 'AU-NSW',
-    usingGoogle: false,
-  }],
+  'Austria': [
+    {
+      name: 'AUT',
+      zip: '1999',
+      result: 'AT-9',
+      usingGoogle: false,
+    },
+    {
+      name: 'Austria',
+      usingGoogle: false,
+      zip: '1999',
+      result: 'AT-9',
+    },
+  ],
+  'Deutschland': [
+    {
+      name: 'DEU',
+      zip: '6578',
+      result: 'DE-TH',
+      usingGoogle: false,
+    },
+  ],
+  'Belgium': [
+    {
+      name: 'BEL',
+      zip: '1701',
+      result: 'BE-VLG',
+      usingGoogle: false,
+    },
+  ],
+  'Switzerland': [
+    {
+      name: 'CHE',
+      zip: '2333',
+      result: 'CH-BE',
+      usingGoogle: false,
+    },
+    {
+      name: 'CHE',
+      zip: '9488',
+      result: 'CH-SG',
+      usingGoogle: false,
+    },
+  ],
+  'Spain': [
+    {
+      name: 'ESP',
+      zip: '04004',
+      result: 'ES-AN',
+      usingGoogle: false,
+    },
+  ],
+  'France': [
+    {
+      name: 'FRA',
+      zip: '25090',
+      result: 'FR-I',
+      usingGoogle: false,
+    },
+    {
+      name: 'FRA',
+      zip: '92440',
+      result: 'FR-J',
+      usingGoogle: false,
+    },
+    {
+      name: 'FRA',
+      zip: '75116',
+      result: 'FR-J',
+      usingGoogle: false,
+    },
+    {
+      name: 'FRA',
+      zip: '51000',
+      result: 'FR-G',
+      usingGoogle: false,
+    },
+    {
+      name: 'FRA',
+      zip: '51100',
+      result: 'FR-G',
+      usingGoogle: false,
+    },
+    {
+      name: 'FRA',
+      zip: '75020',
+      result: 'FR-J',
+      usingGoogle: false,
+    },
+    {
+      name: 'FR',
+      zip: '25090',
+      result: 'FR-I',
+      usingGoogle: false,
+    },
+    {
+      name: 'FR',
+      zip: '87200',
+      result: 'FR-L',
+      usingGoogle: false,
+    },
+    {
+      name: 'FR',
+      zip: '87200 CEDEX 1',
+      result: 'FR-L',
+      usingGoogle: false,
+    },
+    {
+      name: 'FR',
+      zip: '61100',
+      result: 'FR-P',
+      usingGoogle: false,
+    },
+    {
+      name: 'FR',
+      zip: '81000',
+      result: 'FR-N',
+      usingGoogle: false,
+    },
+  ],
+  'United Kingdom': [
+    {
+      name: 'GBR',
+      zip: 'PA13 4PS',
+      result: 'GB-SCT',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'EC2N 1AR',
+      result: 'GB-ENG',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'FY83QN',
+      result: 'GB-ENG',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'CF466RT',
+      result: 'GB-WLS',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'AL10 9BL',
+      result: 'GB-ENG',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'm14 5pq',
+      result: 'GB-ENG',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'Po10 8Eg',
+      result: 'GB-ENG',
+      usingGoogle: false,
+    },
+    {
+      name: 'GBR',
+      zip: 'L5 3QN',
+      result: 'GB-ENG',
+      usingGoogle: false,
+    },
+  ],
+  'Italy': [
+    {
+      name: 'ITA',
+      zip: '67033',
+      result: 'IT-65',
+      usingGoogle: false,
+    },
+    {
+      name: 'ITA',
+      zip: '41121',
+      result: 'IT-45',
+      usingGoogle: false,
+    },
+  ],
+  'India': [
+    {
+      name: 'IND',
+      zip: '110001',
+      result: 'IN-DL',
+      usingGoogle: false,
+    },
+  ],
+  'Ireland': [
+    {
+      name: 'IRL',
+      zip: 'D02 X285',
+      result: 'IE-L',
+      usingGoogle: false,
+    },
+  ],
+  'Romania': [
+    {
+      name: 'ROU',
+      zip: '010011',
+      result: 'RO-B',
+      usingGoogle: false,
+    },
+  ],
+  'Hungary': [
+    {
+      name: 'HUN',
+      zip: '1011',
+      result: 'HU-BU',
+      usingGoogle: false,
+    },
+  ],
+  'Japan': [
+    {
+      name: 'JPN',
+      zip: '100-0001',
+      result: 'JP-13',
+      usingGoogle: false,
+    },
+    {
+      name: 'JPN',
+      zip: '530-0001',
+      result: 'JP-27',
+      usingGoogle: false,
+    },
+  ],
+  'Brazil': [
+    {
+      name: 'BRA',
+      zip: '69900-000',
+      result: 'BR-AC',
+      usingGoogle: false,
+    },
+  ],
+  'South Korea': [
+    {
+      name: 'KOR',
+      zip: '01000',
+      result: 'KR-11',
+      usingGoogle: false,
+    },
+  ],
+  'Lithuania': [
+    {
+      name: 'LTU',
+      zip: '62001',
+      result: 'LT-03',
+      usingGoogle: false,
+    },
+  ],
+  'Luxembourg': [
+    {
+      name: 'LUX',
+      zip: 'L-4795',
+      result: 'LU-CA',
+      usingGoogle: false,
+    },
+  ],
+  'Portugal': [
+    {
+      name: 'PRT',
+      zip: '3020-740',
+      result: 'PT-01',
+      usingGoogle: false,
+    },
+  ],
+  'Slovakia': [
+    {
+      name: 'SVK',
+      zip: '049 01',
+      result: 'SK-BC',
+      usingGoogle: false,
+    },
+  ],
+  'Turkey': [
+    {
+      name: 'TUR',
+      zip: '01010',
+      result: 'TR-01',
+      usingGoogle: false,
+    },
+  ],
+  'Netherlands': [
+    {
+      name: 'NLD',
+      zip: '3541',
+      result: 'NL-UT',
+      usingGoogle: false,
+    },
+    {
+      name: 'NLD',
+      zip: '6869 VC',
+      result: 'NL-GE',
+      usingGoogle: false,
+    },
+    {
+      name: 'NLD',
+      zip: '2294 HC',
+      result: 'NL-ZH',
+      usingGoogle: false,
+    },
+    {
+      name: 'NLD',
+      zip: '2294HC',
+      result: 'NL-ZH',
+      usingGoogle: false,
+    },
+  ],
+  'Canada': [
+    {
+      name: 'CAN',
+      zip: 'X1A 0E2',
+      result: 'CA-NT',
+      usingGoogle: false,
+    },
+    {
+      name: 'CAN',
+      zip: 'X1A 0E2',
+      result: 'CA-NT',
+      usingGoogle: false,
+    },
+    {
+      name: 'CAN',
+      zip: 'X1A0E2',
+      result: 'CA-NT',
+      usingGoogle: false,
+    },
+    {
+      name: 'CAN',
+      zip: 'G1P 2J1',
+      result: 'CA-QC',
+      usingGoogle: false,
+    },
+    {
+      name: 'CAN',
+      zip: 'S0J 0G0',
+      result: 'CA-SK',
+      usingGoogle: false,
+    },
+  ],
+  'Mexico': [
+    {
+      name: 'MEX',
+      zip: '06000',
+      result: 'MX-CMX',
+      usingGoogle: false,
+    },
+  ],
+  'Serbia': [
+    {
+      name: 'SRB',
+      zip: '11000',
+      result: 'RS-00',
+      usingGoogle: false,
+    },
+    {
+      name: 'SRB',
+      zip: '11320',
+      result: 'RS-10',
+      usingGoogle: false,
+    },
+    {
+      name: 'SRB',
+      zip: '18230',
+      result: 'RS-15',
+      usingGoogle: false,
+    },
+    {
+      name: 'SRB',
+      zip: '24430',
+      result: 'RS-03',
+      usingGoogle: false,
+    },
+    {
+      name: 'SRB',
+      zip: '21000',
+      result: 'RS-VO',
+      usingGoogle: false,
+    },
+    {
+      name: 'SRB',
+      zip: '38000',
+      result: 'RS-KM',
+      usingGoogle: false,
+    },
+  ],
+  'United States': [
+    {
+      name: 'USA',
+      zip: '972022239',
+      result: 'US-OR',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '06103',
+      result: 'US-CT',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '00646',
+      result: 'US-PR',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '96799',
+      result: 'US-AS',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '96921',
+      result: 'US-GU',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '96951',
+      result: 'US-MP',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '00831',
+      result: 'US-VI',
+      usingGoogle: false,
+    },
+    {
+      name: 'USA',
+      zip: '10038',
+      result: 'US-NY',
+      usingGoogle: false,
+    },
+  ],
+  'Qatar': [
+    {
+      name: 'QAT',
+      zip: '06000',
+      result: null,
+      usingGoogle: false,
+    },
+  ],
+  'Sweden': [
+    {
+      name: 'SWE',
+      zip: '11337',
+      result: 'SE-AB',
+      usingGoogle: false,
+    },
+    {
+      name: 'SWE',
+      zip: '95435',
+      result: 'SE-BD',
+      usingGoogle: false,
+    },
+    {
+      name: 'SWE',
+      zip: '23531',
+      result: 'SE-M',
+      usingGoogle: false,
+    },
+    {
+      name: 'SWE',
+      zip: '10000',
+      result: 'SE-AB',
+      usingGoogle: false,
+    },
+    {
+      name: 'SWE',
+      zip: '99999',
+      result: 'SE-BD',
+      usingGoogle: false,
+    },
+    {
+      name: 'SWE',
+      zip: '81999',
+      result: 'SE-C',
+      usingGoogle: false,
+    },
+  ],
+  'Finland': [
+    {
+      name: 'FIN',
+      zip: '00940',
+      result: 'FI-18',
+      usingGoogle: false,
+    },
+    {
+      name: 'FIN',
+      zip: '70840',
+      result: 'FI-15',
+      usingGoogle: false,
+    },
+    {
+      name: 'FIN',
+      zip: '96900',
+      result: 'FI-10',
+      usingGoogle: false,
+    },
+    {
+      name: 'FIN',
+      zip: '00100',
+      result: 'FI-18',
+      usingGoogle: false,
+    },
+    {
+      name: 'FIN',
+      zip: '99990',
+      result: 'FI-10',
+      usingGoogle: false,
+    },
+    {
+      name: 'FIN',
+      zip: '20200',
+      result: 'FI-19',
+      usingGoogle: false,
+    },
+    {
+      name: 'FIN',
+      zip: '22100',
+      result: 'FI-01',
+      usingGoogle: false,
+    },
+    {
+      name: 'AUS',
+      zip: '0841',
+      result: 'AU-NT',
+      usingGoogle: false,
+    },
+    {
+      name: 'AUS',
+      zip: '2111',
+      result: 'AU-NSW',
+      usingGoogle: false,
+    },
+  ],
 };
 
 describe('REGION IDENTIFIER', () => {
diff --git a/update/usa.js b/update/usa.js
index c6d9785..467c255 100644
--- a/update/usa.js
+++ b/update/usa.js
@@ -37,4 +37,7 @@ for (const code of codes) {
   fs.unlinkSync(path.join(__dirname, `${code}.zip`));
 }
 
-fs.writeFileSync(path.join(__dirname, '..', 'regions', 'USA.json'), JSON.stringify(result, null, 2));
+fs.writeFileSync(
+  path.join(__dirname, '..', 'regions', 'USA.json'),
+  JSON.stringify(result, null, 2),
+);