Area Code 205

Area code 205 is one of the original 86 North American Numbering Plan area codes established by AT&T on January 1, 1947. It originally covered the entire state of Alabama — one of 34 states served by a single area code — making Alabama one of the earliest jurisdictions in the NANP. The code survived 48 years without modification before its first geographic split. Source: Wikipedia — Area codes 205 and 659

The middle digit "0" in 205 follows AT&T's original rotary-dial conventions: a middle digit of 0 indicated an entire state served by a single area code. This meant 205 required 17 pulses on a rotary telephone (2+10+5), compared to just 5 pulses for New York's 212. The 17-pulse requirement was above the 14.1 average for codes created within five years of 205, suggesting it received lower dialing priority than codes assigned to more populous metropolitan areas. Source: AllAreaCodes — 205 Area Code Profile

• January 1, 1947: Area code 205 is created as one of the 86 original NANP codes. The entire state of Alabama falls under a single numbering plan area. The 205 code originally spanned from Birmingham to Mobile to Montgomery, covering all 67 Alabama counties. Source: Wikipedia
• January 15, 1995: Area code 334 is created as a geographic split from 205. Southern Alabama — including the Montgomery and Mobile LATAs — transfers to the new 334 area code. Birmingham, Huntsville, and Tuscaloosa retain 205. The split was effective at 2:00 AM CST. Permissive dialing (allowing old 205 numbers to reach 334 destinations) ended May 13, 1995. This was the first modification to the 205 NPA since its 1947 creation. Source: Wikipedia — Alabama area codes
• March 23, 1998: Area code 256 is created as a geographic split from 205. Northern and eastern Alabama — including Huntsville, Decatur, Gadsden, Anniston, Florence, and Cullman — transfers to the new 256 area code. 205 is reduced to west-central Alabama centered on Birmingham. Permissive use of 205 in 256 territory continued through September 28, 1998. Source: NANPA PL-110
• November 12, 2019: Area code 659 is added as an all-services distributed overlay for the remaining 205 territory — the first overlay in Alabama history. The Alabama Public Service Commission approved the overlay on August 7, 2018 (Docket No. 27749). Permissive 10-digit dialing began April 13, 2019; mandatory 10-digit dialing began October 12, 2019; and 659 codes became assignable on November 12, 2019. The overlay was originally proposed in 2001 but delayed by the APSC for 17 years before approval. Source: AL.com — Why Alabama may be getting a new area code

The regulatory history of area code 205 is governed by the Alabama Public Service Commission (APSC), which exercises delegated authority under the federal framework established by the FCC. Under 47 CFR § 52.19, the FCC grants state commissions the authority to resolve numbering relief matters within their states. For Alabama, the APSC serves as the primary regulator, with NANPA administering the numbering plan nationally. Source: 47 CFR § 52.19 — FCC Delegated Authority