The original 1947 Telephone Area Code Map - Codes were assigned based on population and time it took to dial the code on a rotary phone dial. High population areas got small
Beginning October 24, 2021 Mandatory 10 Digit Dialing New York begins for 914 Area Codes
Area codes locator - Area code lookup by number or city
Area codes locator - Area code lookup by number or city
Texans in several area codes will need to dial 10 digits starting soon
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240 Area Code - Location map, time zone, and phone lookup
Upcoming Area Code Changes: What You Need to Know | RingBoost
Area codes locator - Area code lookup by number or city
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How to add country/area code to a phone number list in Excel?
How to add country/area code to a phone number list in Excel?
SYSTEM UPDATE: Transition to 8-Digit Telephone Number
PLDT Users with Area Code (02) Now Have 8-digit Telephone Numbers - TeknoGadyet
All US area codes by state | Freshdesk Contact Center (Formerly Freshcaller)
Local Calls to Require Dialing Area Code + Telephone Number Beginning Feb. 11 | Syracuse University News
647 Area Code - Location map, time zone, and phone lookup
All US area codes by state | Freshdesk Contact Center (Formerly Freshcaller)
New 472 area code takes effect in southeastern North Carolina in 2022
202 Area Code - Location map, time zone, and phone lookup
US Area Codes Lookup | US Telephone Area Codes Map
