816 Area Code: Kansas City, Missouri

The 816 area code covers Kansas City, Missouri, and the surrounding northwestern Missouri counties. Kansas City sits at the confluence of the Missouri and Kansas rivers, on a stretch of rolling country that has anchored the city's working profile since the nineteenth century — the stockyards, the rail junction, and the surrounding agribusiness drove much of the city's growth, and a substantial banking, insurance, and corporate-headquarters base grew up around them. The 816 footprint covers Kansas City along with St. Joseph, Independence, and the surrounding northwestern Missouri cities.

In records the directory has compiled for 816 numbers, other Missouri cities — Columbia, O'Fallon, Sedalia, and Springfield — recur frequently. None of those are inside the 816 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Missouri and addresses linked across multiple cities. The directory currently documents 566 distinct prefixes within 816 in detail, a working subset of the prefix population the code carries.

Kansas City's home values come in below the US median, with median household income running below the national figure but not severely so. The city's median age sits a few years under the US reading, and population places Kansas City among the larger cities in the Midwest — substantial enough to anchor a metropolitan area that extends across the Kansas state line and pulls steadily on populations from across the surrounding states. The 816 footprint covers the Missouri side of the metro along with the smaller cities and rural counties extending north.