918 Area Code: Tulsa, Oklahoma

Northeastern Oklahoma is served by the 918 area code, with Tulsa as its primary city. Tulsa sits along the Arkansas River in northeastern Oklahoma, on a stretch of country that has long anchored the city's working profile — the city was once the Oil Capital of the World during the early-twentieth-century oil boom, and the rebuilt downtown still carries traces of that period in a substantial cluster of art deco buildings. The local working economy reflects continuing energy-industry headquarters, healthcare, an aerospace base centered on Tulsa International Airport, and a growing technology sector. The 918 footprint extends through Muskogee, Bartlesville, Tahlequah (Northeastern State University and the capital of the Cherokee Nation), and the surrounding cluster of northeastern Oklahoma communities.

In records the directory has compiled for 918 numbers, other Oklahoma cities — Lawton and Oklahoma City — recur frequently. Neither is inside the 918 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Oklahoma and addresses linked across multiple cities. The directory currently documents 638 distinct prefixes within 918 in detail, a working subset of the prefix population the code carries.

Tulsa'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 Tulsa as the second-largest city in Oklahoma — substantial enough to anchor a regional economy organized around the energy industry, healthcare, and the surrounding cluster of small cities and farming counties of northeastern Oklahoma.