Area Code 205 – Alabama
The phone area code for Alabama is 205 (international format +1205). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Alabama
Geographic Coverage and Jurisdiction
Area code 205 is a geographic North American Numbering Plan (NANP) code serving the central and western portions of the U.S. state of Alabama. It is one of the original area codes assigned in 1947 and historically covered the entire state. Today, 205 is exclusively assigned to the western and central regions, including the state capital, Montgomery, and the largest city in the state, Birmingham. The code also covers the cities of Tuscaloosa, Homewood, Bessemer, Hoover, and the surrounding counties such as Jefferson, Shelby, Tuscaloosa, Montgomery, and others. The service area is bounded by area codes 256 to the northeast, 334 to the southeast, and 251 to the south.
Dialing Formats and Caller Instructions
For local calls within the 205 area code, callers must dial the 10-digit number (area code + 7-digit local number) due to overlay implementation. For calls from outside the 205 area but within the NANP (e.g., from 334), dial 1 + 205 + the 7-digit number. International callers should dial their country's exit code, followed by 1 (the U.S. country code), then 205 and the local number. For example, to call a business in Birmingham from abroad, dial +1 205 555 0123. When dialing from a mobile phone, the plus sign (+) can be used in place of the exit code.
Overlay and Numbering Resources
In 2001, area code 205 was overlaid with area code 659 to meet growing demand for new telephone numbers. This means that a single geographic region is served by two area codes, and all calls within the overlay area require 10-digit dialing. The overlay does not change the cost of calls; local calls remain local regardless of which area code is dialed. New numbers in the region may be assigned either 205 or 659, and callers must be prepared to dial the full 10-digit number for all calls, including local ones.
Technical and Regulatory Notes
205 is a geographic area code, meaning it is tied to a specific physical location. However, with the advent of number portability, a phone number with area code 205 may be assigned to a VoIP or mobile service that operates anywhere in the country. Despite this, the area code still denotes the original geographic assignment for regulatory and routing purposes. The North American Numbering Plan Administration (NANPA) oversees the allocation of prefixes within 205, and the Alabama Public Service Commission regulates telecommunications services in the state. For emergency services, callers within the 205 area should dial 911, which routes to the appropriate public safety answering point based on the caller's location.