diff --git a/src/Provider/pt_PT/PhoneNumber.php b/src/Provider/pt_PT/PhoneNumber.php
index 948ba94d92..08b741fbc3 100644
--- a/src/Provider/pt_PT/PhoneNumber.php
+++ b/src/Provider/pt_PT/PhoneNumber.php
@@ -4,36 +4,63 @@
 
 class PhoneNumber extends \Faker\Provider\PhoneNumber
 {
+    /**
+     * Phone country code.
+     */
+    public const COUNTRY_CODE = '+351';
+
+    /**
+     * Mobile Service Codes
+     */
+    public const MOBILE_SERVICE_CODE = [
+        91,
+        92,
+        93,
+        96,
+    ];
+
+    /**
+     * Geographic Area Codes
+     */
+    public const AREA_CODE = [
+        21,
+        22,
+        23,
+        24,
+        25,
+        26,
+        27,
+        28,
+        29,
+    ];
+
+    /**
+     * Geographic Area and Mobile Service Codes
+     */
+    public const AREA_AND_MOBILE_SERVICE_CODE = [
+        ...self::AREA_CODE,
+        ...self::MOBILE_SERVICE_CODE,
+    ];
+
     /**
      * @see http://en.wikipedia.org/wiki/Telephone_numbers_in_Portugal
      */
     protected static $formats = [
-        '+351 91#######',
-        '+351 92#######',
-        '+351 93#######',
-        '+351 96#######',
-        '+351 21#######',
-        '+351 22#######',
-        '+351 23#######',
-        '+351 24#######',
-        '+351 25#######',
-        '+351 26#######',
-        '+351 27#######',
-        '+351 28#######',
-        '+351 29#######',
-        '91#######',
-        '92#######',
-        '93#######',
-        '96#######',
-        '21#######',
-        '22#######',
-        '23#######',
-        '24#######',
-        '25#######',
-        '26#######',
-        '27#######',
-        '28#######',
-        '29#######',
+        '{{countryCode}} {{areaAndMobileServiceCode}}#######',
+        '{{mobileServiceCode}}#######',
+        '{{areaCode}}#######',
+    ];
+
+    protected static $e164Formats = [
+        '{{countryCode}}{{areaAndMobileServiceCode}}#######',
+    ];
+
+    protected static $e164MobileFormat = [
+        '{{countryCode}}{{mobileServiceCode}}#######',
+    ];
+
+    protected static $e164LandlineFormat = [
+        '{{countryCode}}{{areaCode}}#######',
     ];
 
     protected static $mobileNumberPrefixes = [
@@ -47,4 +74,53 @@ public static function mobileNumber()
     {
         return static::numerify(static::randomElement(static::$mobileNumberPrefixes));
     }
+
+    public static function areaAndMobileServiceCode()
+    {
+        return static::randomElement(self::AREA_AND_MOBILE_SERVICE_CODE);
+    }
+
+    public static function areaCode()
+    {
+        return static::randomElement(self::AREA_CODE);
+    }
+
+    public static function mobileServiceCode()
+    {
+        return static::randomElement(self::MOBILE_SERVICE_CODE);
+    }
+
+    /**
+     * Returns the phone country code.
+     *
+     * @return string
+     */
+    public static function countryCode()
+    {
+        return self::COUNTRY_CODE;
+    }
+
+    /**
+     * Returns a mobile number in E.164 format.
+     *
+     * Example: +35193XXXXXXX
+     *
+     * @return string
+     */
+    public function e164MobileNumber()
+    {
+        return static::numerify($this->generator->parse(static::randomElement(static::$e164MobileFormat)));
+    }
+
+    /**
+     * Returns a landline number in E.164 format.
+     *
+     * Example: +35121XXXXXXX
+     *
+     * @return string
+     */
+    public function e164LandlineNumber()
+    {
+        return static::numerify($this->generator->parse(static::randomElement(static::$e164LandlineFormat)));
+    }
 }
diff --git a/test/Provider/pt_PT/PhoneNumberTest.php b/test/Provider/pt_PT/PhoneNumberTest.php
index 0014da4ce0..35b0d16974 100644
--- a/test/Provider/pt_PT/PhoneNumberTest.php
+++ b/test/Provider/pt_PT/PhoneNumberTest.php
@@ -14,14 +14,29 @@ final class PhoneNumberTest extends TestCase
 {
     public function testPhoneNumberReturnsPhoneNumberWithOrWithoutPrefix(): void
     {
-        self::assertMatchesRegularExpression('/^(9[1,2,3,6][0-9]{7})|(2[0-9]{8})|(\+351 [2][0-9]{8})|(\+351 9[1,2,3,6][0-9]{7})/', $this->faker->phoneNumber());
+        self::assertMatchesRegularExpression('/^(?:\+351 )?(?:9[1,2,3,6][0-9]{7}|2[1-9][0-9]{7})$/', $this->faker->phoneNumber());
     }
 
-    public function testMobileNumberReturnsMobileNumberWithOrWithoutPrefix(): void
+    public function testMobileNumberReturnsMobileNumberWithoutPrefix(): void
     {
         self::assertMatchesRegularExpression('/^(9[1,2,3,6][0-9]{7})/', $this->faker->mobileNumber());
     }
 
+    public function testE164PhoneNumberReturnsE164MobileOrLandlineNumber(): void
+    {
+        self::assertMatchesRegularExpression('/^\+351(?:9[1,2,3,6][0-9]{7}|2[1-9][0-9]{7})$/', $this->faker->e164PhoneNumber());
+    }
+
+    public function testE164MobileNumberReturnsE164MobileNumber(): void
+    {
+        self::assertMatchesRegularExpression('/^\+3519[1,2,3,6][0-9]{7}$/', $this->faker->e164MobileNumber());
+    }
+
+    public function testE164LandlineNumberReturnsE164LandlineNumber(): void
+    {
+        self::assertMatchesRegularExpression('/^\+3512[1-9][0-9]{7}$/', $this->faker->e164LandlineNumber());
+    }
+
     protected function getProviders(): iterable
     {
         yield new PhoneNumber($this->faker);