How to Call the UK from the US | Dialing Guide + Area Codes
International Calling Codes: How to Dial to and from Europe & the US by Rick Steves
How to Call the UK from the US | Dialing Guide + Area Codes
How to add a US country code to a phone number - Quora
Country Codes List - ISO ALPHA-2, ISO ALPHA-3 and Numerical Country Codes - Nations Online Project
United States Dialing Code - American Country Code - Telephone Area Codes in United States - YouTube
International Dialing Codes - by country / territory name - Travel-Images.com
International Rates
How To Call The United States from England | Global Call Forwarding
3 Ways to Call the United States From the United Kingdom - wikiHow
Edit phone number - Microsoft Support
List of country calling codes - Wikipedia
What's the logic behind telephone country (ISD) codes? - Quora
US country code: for WhatsApp, from UK, from India, Mexico
Area codes locator - Area code lookup by number or city
Supported country codes
List of dialling codes in Brazil - Wikipedia
Country Codes, Phone Codes, Dialing Codes, Telephone Codes, ISO Country Codes - YouTube
How to give a US phone number internationally - Quora
Formatting International Phone Numbers – Twilio Support
Phone numbers in Excel: validating, parsing, and formatting - QueryStorm
Get Your Phone Numbers at Global Call Forwarding
3 Ways to Call the United States From the United Kingdom - wikiHow
US Phone Number Format Examples with Country Code
