405 Area Code: Oklahoma City, Oklahoma

Central Oklahoma is served by the 405 area code, with Oklahoma City as its primary city. Oklahoma City sits on the Canadian River in the heart of the state, on a flat stretch of the southern Plains where the city's grid extends across an unusually wide footprint — the city is among the largest by area in the United States, a result of postwar annexations that absorbed much of the surrounding Oklahoma County. The local working economy reflects state government, a substantial energy sector centered on oil-and-gas exploration and production, healthcare, and the surrounding agricultural base. The 405 footprint extends through Norman (the University of Oklahoma's main campus), Edmond, Stillwater (Oklahoma State), and the surrounding central Oklahoma counties.

Records linked to 405 numbers in the directory often include other Oklahoma cities — Lawton and Tulsa among them. Neither is inside the 405 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Oklahoma and addresses linked across multiple cities. The directory currently documents 631 distinct prefixes within 405 in detail, a working subset of the prefix population the code carries.

Oklahoma City's home values come in below the US median, with median household income running below the national figure. The city's median age sits a few years under the US reading, and population places Oklahoma City as the largest city in Oklahoma — substantial enough to anchor a metropolitan area that pulls steadily on populations from across the southern Plains. The broader 405 footprint reflects a mix of central Oklahoma cities and the surrounding rural counties.