Update PhoneNumberExtensionsTests.cs

test/PhoneNumbers.Tests/PhoneNumberExtensionsTests.cs

@@ -23,6 +23,7 @@ public void NdcIsOptional_True_For_Geographic_Number_With_Local_Dialling_Allowed
     [InlineData("IT", "+378882555", "0549882555")]         // San Marino NonGeo with Italy NDC from Italy
     [InlineData("IT", "+378693247", "00378693247")]        // San Marino Mobile from Italy
     [InlineData("IT", "+378598765", "00378598765")]        // San Marino Mobile from Italy
+    [InlineData("CA", "+12124841200" "12124841200")]       // US number from Canada
     public void NumberToDialFrom_CountryInfo(string sourceCountryCode, string destination, string expected) =>
         Assert.Equal(
             expected,
@@ -68,6 +69,8 @@ public void NumberToDialFrom_PhoneNumber_Throws_If_CountryInfo_Null()
     [InlineData("+393492525255", "+378598765", "00378598765")]       // Italy to San Marino IP
     [InlineData("+12497121234", "+12494185634", "2494185634")]       // Canada within NDC, local dilling permitted, NDC required
     [InlineData("+18797121234", "+18794185634", "4185634")]          // Canada within NDC, local dilling permitted, NDC not required
+    [InlineData("+19517121234", "+19514185634", "2494185634")]       // US within NDC, local dilling permitted, NDC required
+    [InlineData("+15597121234", "+15594185634", "4185634")]          // US within NDC, local dilling permitted, NDC not required
     public void NumberToDialFrom_PhoneNumber(string source, string destination, string expected) =>
         Assert.Equal(
             expected,