New dialing procedure for Texas customers in 806 area code
Area codes locator - Area code lookup by number or city
New area code 472 starting in southeastern NC in October | WUNC
Country Calling Codes | Mobile Help | Skinny NZ
43 Country Code - Austria Phone Dialling Code - How To Call Austria From UK
Telephone numbers in Austria - Wikipedia
International Calling Codes: How to Dial to and from Europe & the US by Rick Steves
List of dialling codes in Germany - Wikipedia
How to Call Austria: 8 Steps (with Pictures) - wikiHow
How to Call Austria: 8 Steps (with Pictures) - wikiHow
Telephone numbers in the Philippines - Wikipedia
Globe Dial Code:Amazon.com:Appstore for Android
OUCC: 812 Area Code Changes: Comments Invited
Hidden Smartphone Codes You Should Start Using | Reader's Digest
Ohio goes 10-digit dialing Saturday, adds '380' area code soon
Telephone numbers in the Republic of Ireland - Wikipedia
Telephone numbers in Poland - Wikipedia
Baltimore, MD Local Phone Numbers | Area Code 410
Which country is the dialing code +97? - Quora
Philippine Telephone Area Codes | PDF
International Calling Codes - Nations Online Project
File:Area code 641.svg - Wikimedia Commons
833 Area Code: Location, Toll-free, Scams or Legit, & Guides
