256 Area Code: Huntsville, Alabama

Most numbers reading as 256 originate in north Alabama, with the city of Huntsville at the center of the footprint. Huntsville's identity is bound up with aerospace: the Marshall Space Flight Center sits at Redstone Arsenal on the city's southern edge, and the cluster of defense, missile, and rocket-engineering firms that grew up around it has shaped the city's economy and population for the better part of a century. The 256 area code, part of the North American Numbering Plan, spans both that technology core and the Tennessee Valley farmland that surrounds it.

In terms of records the directory has compiled, names from elsewhere in the state — Birmingham, Mobile, and Montgomery — recur often in entries linked to 256 numbers. Those cities are not inside the 256 footprint; the overlap reflects the way numbers, addresses, and people drift across state lines and area-code boundaries through porting, prior service, and other public-record traces. We presently track 605 distinct prefixes within this code, and that figure should be read as the directory's documented holdings rather than a complete tally. The actual prefix population is larger.

Huntsville's median household income is closer to the US median than is typical for Alabama metros, a reflection of the technical workforce drawn to the area's labs and contractors. Home values are healthy though still below the national figure, and the city's median age sits in the mid-thirties. Population has been climbing steadily for years and the city now ranks among the largest in Alabama.