diff --git a/README.md b/README.md
index 791fb53c5..94f541b9b 100644
--- a/README.md
+++ b/README.md
@@ -154,7 +154,7 @@ Validator                               | Description
 **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']`.
 **isOctal(str)**                        | check if the string is a valid octal number.
-**isPassportNumber(str, countryCode)**    | check if the string is a valid passport number.<br/><br/>`countryCode` is one of `['AM', 'AR', 'AT', 'AU', 'AZ', 'BE', 'BG', 'BY', 'BR', 'CA', 'CH', 'CN', 'CY', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IE', 'IN', 'IR', 'ID', 'IS', 'IT', 'JM', 'JP', 'KR', 'KZ', 'LI', 'LT', 'LU', 'LV', 'LY', 'MT', 'MX', 'MY', 'MZ', 'NL', 'NZ', 'PH', 'PK', 'PL', 'PT', 'RO', 'RU', 'SE', 'SL', 'SK', 'TH', 'TR', 'UA', 'US', 'ZA']`.  Locale list is `validator.passportNumberLocales`.
+**isPassportNumber(str, countryCode)**    | check if the string is a valid passport number.<br/><br/>`countryCode` is one of `['AM', 'AR', 'AO', 'AT', 'AU', 'AZ', 'BE', 'BG', 'BY', 'BR', 'CA', 'CH', 'CN', 'CY', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IE', 'IN', 'IR', 'ID', 'IS', 'IT', 'JM', 'JP', 'KR', 'KZ', 'LI', 'LT', 'LU', 'LV', 'LY', 'MT', 'MX', 'MY', 'MZ', 'NL', 'NZ', 'PH', 'PK', 'PL', 'PT', 'RO', 'RU', 'SE', 'SL', 'SK', 'TH', 'TR', 'UA', 'US', 'ZA']`.  Locale list is `validator.passportNumberLocales`.
 **isPort(str)**                         | check if the string is a valid port number.
 **isPostalCode(str, locale)**           | check if the string is a postal code.<br/><br/>`locale` is one of `['AD', 'AT', 'AU', 'AZ', 'BA', 'BE', 'BG', 'BR', 'BY', 'CA', 'CH', 'CN', 'CO', 'CZ', 'DE', 'DK', 'DO', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HT', 'HU', 'ID', 'IE', 'IL', 'IN', 'IR', 'IS', 'IT', 'JP', 'KE', 'KR', 'LI', 'LK', 'LT', 'LU', 'LV', 'MG', 'MT', 'MX', 'MY', 'NL', 'NO', 'NP', 'NZ', 'PL', 'PR', 'PT', 'RO', 'RU', 'SA', 'SE', 'SG', 'SI', 'SK', 'TH', 'TN', 'TW', 'UA', 'US', 'ZA', 'ZM']` OR `'any'`. If 'any' is used, function will check if any of the locales match. Locale list is `validator.isPostalCodeLocales`.
 **isRFC3339(str)**                      | check if the string is a valid [RFC 3339][RFC 3339] date.
diff --git a/src/lib/isMobilePhone.js b/src/lib/isMobilePhone.js
index 393ee6fbd..fa6bdccfa 100644
--- a/src/lib/isMobilePhone.js
+++ b/src/lib/isMobilePhone.js
@@ -136,7 +136,7 @@ const phones = {
   'pl-PL': /^(\+?48)? ?([5-8]\d|45) ?\d{3} ?\d{2} ?\d{2}$/,
   'pt-BR': /^((\+?55\ ?[1-9]{2}\ ?)|(\+?55\ ?\([1-9]{2}\)\ ?)|(0[1-9]{2}\ ?)|(\([1-9]{2}\)\ ?)|([1-9]{2}\ ?))((\d{4}\-?\d{4})|(9[1-9]{1}\d{3}\-?\d{4}))$/,
   'pt-PT': /^(\+?351)?9[1236]\d{7}$/,
-  'pt-AO': /^(\+244)\d{9}$/,
+  'pt-AO': /^(\+?244|00244|)9\d{8}$/,
   'ro-MD': /^(\+?373|0)((6(0|1|2|6|7|8|9))|(7(6|7|8|9)))\d{6}$/,
   'ro-RO': /^(\+?40|0)\s?7\d{2}(\/|\s|\.|-)?\d{3}(\s|\.|-)?\d{3}$/,
   'ru-RU': /^(\+?7|8)?9\d{9}$/,
diff --git a/src/lib/isPassportNumber.js b/src/lib/isPassportNumber.js
index 92282ac78..fb6d9b808 100644
--- a/src/lib/isPassportNumber.js
+++ b/src/lib/isPassportNumber.js
@@ -9,6 +9,7 @@ import assertString from './util/assertString';
 const passportRegexByCountryCode = {
   AM: /^[A-Z]{2}\d{7}$/, // ARMENIA
   AR: /^[A-Z]{3}\d{6}$/, // ARGENTINA
+  AO: /^N\d{7}$/, // ANGOLA
   AT: /^[A-Z]\d{7}$/, // AUSTRIA
   AU: /^[A-Z]\d{7}$/, // AUSTRALIA
   AZ: /^[A-Z]{1}\d{8}$/, // AZERBAIJAN
diff --git a/test/validators.test.js b/test/validators.test.js
index d0908ad12..be55cda2a 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -2984,6 +2984,18 @@ describe('Validators', () => {
       ],
     });
 
+    test({
+      validator: 'isPassportNumber',
+      args: ['AO'],
+      valid: [
+        'N4560459',
+      ],
+      invalid: [
+        'N090993420',
+        'N43044347',
+      ],
+    });
+
     test({
       validator: 'isPassportNumber',
       args: ['AR'],
@@ -10370,7 +10382,7 @@ describe('Validators', () => {
         locale: 'pt-AO',
         valid: [
           '+244911123432',
-          '+244123091232',
+          '+244923819817',
         ],
         invalid: [
           '+2449111234321',