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feat(isMobilePhone): Add Monaco mobile phone numbers support #2697

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Add regex for Monaco mobile phone numbers
tonienguix Apr 9, 2026
3558bee
feat(isMobilePhone): Add Monaco mobile phone numbers support — modifi…
tonienguix Apr 9, 2026
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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -150,7 +150,7 @@ Validator | Description
**isMailtoURI(str, [, options])** | check if the string is a [Mailto URI format][Mailto URI Format].<br/><br/>`options` is an object of validating emails inside the URI (check `isEmail`s options for details).
**isMD5(str)** | check if the string is a MD5 hash.<br/><br/>Please note that you can also use the `isHash(str, 'md5')` function. Keep in mind that MD5 has some collision weaknesses compared to other algorithms (e.g., SHA).
**isMimeType(str)** | check if the string matches to a valid [MIME type][MIME Type] format.
**isMobilePhone(str [, locale [, options]])** | check if the string is a mobile phone number,<br/><br/>`locale` is either an array of locales (e.g. `['sk-SK', 'sr-RS']`) OR one of `['am-Am', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-EH', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-PS', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'az-AZ', 'az-LB', 'az-LY', 'be-BY', 'bg-BG', 'bn-BD', 'bs-BA', 'ca-AD', 'cs-CZ', 'da-DK', 'de-AT', 'de-CH', 'de-DE', 'de-LU', 'dv-MV', 'dz-BT', 'el-CY', 'el-GR', 'en-AG', 'en-AI', 'en-AU', 'en-BM', 'en-BS', 'en-BW', 'en-CA', 'en-GB', 'en-GG', 'en-GH', 'en-GY', 'en-HK', 'en-IE', 'en-IN', 'en-JM', 'en-KE', 'en-KI', 'en-KN', 'en-LS', 'en-MO', 'en-MT', 'en-MU', 'en-MW', 'en-NG', 'en-NZ', 'en-PG', 'en-PH', 'en-PK', 'en-RW', 'en-SG', 'en-SL', 'en-SS', 'en-TZ', 'en-UG', 'en-US', 'en-ZA', 'en-ZM', 'en-ZW', 'es-AR', 'es-BO', 'es-CL', 'es-CO', 'es-CR', 'es-CU', 'es-DO', 'es-EC', 'es-ES', 'es-GT','es-HN', 'es-MX', 'es-NI', 'es-PA', 'es-PE', 'es-PY', 'es-SV', 'es-UY', 'es-VE', 'et-EE', 'fa-AF', 'fa-IR', 'fi-FI', 'fj-FJ', 'fo-FO', 'fr-BE', 'fr-BF', 'fr-BJ', 'fr-CD', 'fr-CF', 'fr-DJ', 'fr-FR', 'fr-GF', 'fr-GP', 'fr-MQ', 'fr-PF', 'fr-RE', 'fr-WF', 'ga-IE', 'he-IL', 'hu-HU', 'id-ID', 'ir-IR', 'it-IT', 'it-SM', 'ja-JP', 'ka-GE', 'kk-KZ', 'kl-GL', 'ko-KR', 'ky-KG', 'lt-LT', 'mg-MG', 'mn-MN', 'mk-MK', 'ms-MY', 'my-MM', 'mz-MZ', 'nb-NO', 'ne-NP', 'nl-AW', 'nl-BE', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-AO', 'pt-BR', 'pt-PT', 'ro-Md', 'ro-RO', 'ru-RU', 'si-LK', 'sk-SK', 'sl-SI', 'so-SO', 'sq-AL', 'sr-RS', 'sv-SE', 'tg-TJ', 'th-TH', 'tk-TM', 'tr-TR', 'uk-UA', 'uz-UZ', 'vi-VN', 'zh-CN', 'zh-HK', 'zh-MO', 'zh-TW']` OR defaults to `'any'`. If 'any' or a falsey value is used, function will check if any of the locales match).<br/><br/>`options` is an optional object that can be supplied with the following keys: `strictMode`, if this is set to `true`, the mobile phone number must be supplied with the country code and therefore must start with `+`. Locale list is `validator.isMobilePhoneLocales`.
**isMobilePhone(str [, locale [, options]])** | check if the string is a mobile phone number,<br/><br/>`locale` is either an array of locales (e.g. `['sk-SK', 'sr-RS']`) OR one of `['am-Am', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-EH', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-PS', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'az-AZ', 'az-LB', 'az-LY', 'be-BY', 'bg-BG', 'bn-BD', 'bs-BA', 'ca-AD', 'cs-CZ', 'da-DK', 'de-AT', 'de-CH', 'de-DE', 'de-LU', 'dv-MV', 'dz-BT', 'el-CY', 'el-GR', 'en-AG', 'en-AI', 'en-AU', 'en-BM', 'en-BS', 'en-BW', 'en-CA', 'en-GB', 'en-GG', 'en-GH', 'en-GY', 'en-HK', 'en-IE', 'en-IN', 'en-JM', 'en-KE', 'en-KI', 'en-KN', 'en-LS', 'en-MO', 'en-MT', 'en-MU', 'en-MW', 'en-NG', 'en-NZ', 'en-PG', 'en-PH', 'en-PK', 'en-RW', 'en-SG', 'en-SL', 'en-SS', 'en-TZ', 'en-UG', 'en-US', 'en-ZA', 'en-ZM', 'en-ZW', 'es-AR', 'es-BO', 'es-CL', 'es-CO', 'es-CR', 'es-CU', 'es-DO', 'es-EC', 'es-ES', 'es-GT','es-HN', 'es-MX', 'es-NI', 'es-PA', 'es-PE', 'es-PY', 'es-SV', 'es-UY', 'es-VE', 'et-EE', 'fa-AF', 'fa-IR', 'fi-FI', 'fj-FJ', 'fo-FO', 'fr-BE', 'fr-BF', 'fr-BJ', 'fr-CD', 'fr-CF', 'fr-DJ', 'fr-FR', 'fr-GF', 'fr-GP', 'fr-MC', 'fr-MQ', 'fr-PF', 'fr-RE', 'fr-WF', 'ga-IE', 'he-IL', 'hu-HU', 'id-ID', 'ir-IR', 'it-IT', 'it-SM', 'ja-JP', 'ka-GE', 'kk-KZ', 'kl-GL', 'ko-KR', 'ky-KG', 'lt-LT', 'mg-MG', 'mn-MN', 'mk-MK', 'ms-MY', 'my-MM', 'mz-MZ', 'nb-NO', 'ne-NP', 'nl-AW', 'nl-BE', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-AO', 'pt-BR', 'pt-PT', 'ro-Md', 'ro-RO', 'ru-RU', 'si-LK', 'sk-SK', 'sl-SI', 'so-SO', 'sq-AL', 'sr-RS', 'sv-SE', 'tg-TJ', 'th-TH', 'tk-TM', 'tr-TR', 'uk-UA', 'uz-UZ', 'vi-VN', 'zh-CN', 'zh-HK', 'zh-MO', 'zh-TW']` OR defaults to `'any'`. If 'any' or a falsey value is used, function will check if any of the locales match).<br/><br/>`options` is an optional object that can be supplied with the following keys: `strictMode`, if this is set to `true`, the mobile phone number must be supplied with the country code and therefore must start with `+`. Locale list is `validator.isMobilePhoneLocales`.
**isMongoId(str)** | check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
**isMultibyte(str)** | check if the string contains one or more multibyte chars.
**isNumeric(str [, options])** | check if the string contains only numbers.<br/><br/>`options` is an object which defaults to `{ no_symbols: false }` it also has `locale` as an option. If `no_symbols` is true, the validator will reject numeric strings that feature a symbol (e.g. `+`, `-`, or `.`).<br/><br/>`locale` determines the decimal separator and is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'eo', 'es-ES', 'fr-FR', 'fr-CA', 'hu-HU', 'it-IT', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`.
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1 change: 1 addition & 0 deletions src/lib/isMobilePhone.js
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Expand Up @@ -106,6 +106,7 @@ const phones = {
'fr-FR': /^(\+?33|0)[67]\d{8}$/,
'fr-GF': /^(\+?594|0|00594)[67]\d{8}$/,
'fr-GP': /^(\+?590|0|00590)[67]\d{8}$/,
'fr-MC': /^(\+?377)(4[456]\d{6}|6\d{8})$/,
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Copilot AI Apr 9, 2026

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The fr-MC pattern mixes different national-number lengths: the 4[456]\d{6} branch matches 8 digits after 377, but the 6\d{8} branch matches 9 digits after 377. This inconsistency is likely unintended and will accept numbers with different lengths depending on prefix. Please verify Monaco’s mobile number length and adjust the regex (and corresponding fixtures) so both branches reflect the correct national significant number length.

Suggested change
'fr-MC': /^(\+?377)(4[456]\d{6}|6\d{8})$/,
'fr-MC': /^(\+?377)(4[456]\d{6}|6\d{7})$/,

Copilot uses AI. Check for mistakes.
'fr-MQ': /^(\+?596|0|00596)[67]\d{8}$/,
'fr-PF': /^(\+?689)?8[789]\d{6}$/,
'fr-RE': /^(\+?262|0|00262)[67]\d{8}$/,
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25 changes: 25 additions & 0 deletions test/validators.test.js
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Expand Up @@ -8846,6 +8846,31 @@ describe('Validators', () => {
'+59061245789',
],
},
{
locale: 'fr-MC',
valid: [
'+37744123456',
'+37745678901',
'+37746234567',
'+377612345678',
'+377698765432',
'37744123456',
'37745678901',
'37746234567',
'377612345678',
'377698765432',
],
invalid: [
'37743123456',
'+37747123456',
'+37741123456',
'+377512345678',
Comment on lines +8855 to +8867
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Copilot AI Apr 9, 2026

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The added fr-MC fixtures treat +3776… numbers as having 9 digits after the country code (e.g. +377612345678), while +37744… numbers have 8 digits after the country code. This makes the fixture set internally inconsistent and tightly couples it to the current regex behavior. After confirming the correct Monaco number length, please update these test cases to use the correct digit count consistently.

Suggested change
'+377612345678',
'+377698765432',
'37744123456',
'37745678901',
'37746234567',
'377612345678',
'377698765432',
],
invalid: [
'37743123456',
'+37747123456',
'+37741123456',
'+377512345678',
'+37761234567',
'+37769876543',
'37744123456',
'37745678901',
'37746234567',
'37761234567',
'37769876543',
],
invalid: [
'37743123456',
'+37747123456',
'+37741123456',
'+377612345678',

Copilot uses AI. Check for mistakes.
'+3776123456',
'12345',
'+33612345678',
'0612345678',
],
},
{
locale: 'fr-MQ',
valid: [
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