What is the format for phone number formatting? E.164 phone number formatting entails the following: 1 A + (plus) sign (replacing the International Call Prefix like 011) 2 International Country Calling code 3 Local Area code 4 Local Phone numberHow to write a valid mobile phone number in international format? How to write a valid mobile phone number in international format? In several countries, you may need to add a zero (0) when dialing a number inside the same country. To dial a number in the United Kingdom, dial the internal area code (01296). The number would look like this: 01296 999999.How do you write a phone number on a letter? It is common to write phone numbers as (0xx) yyyyyyy, where xx is the area code. The 0 prefix is for trunk (long-distance) dialing from within the country. International callers should dial +92 xx yyyyyyyy . All mobile phone codes are four digits long and start with 03xx.How do you write a phone number outside of australia? Use this format when giving Australian telephone numbers for use outside Australia. Start with a plus sign (‘+’) and add the country code. the telephone number in blocks of 4 digits. write the mobile telephone number in blocks of 3 digits.
If your looking for a (US) phone number to be converted in real time. I suggest using this extension. This method works perfectly without filling in the numbers backwards. The String.Format solution appears to work backwards. Just apply this extension to your string.