314 Area Code: St. Louis, Missouri

The 314 area code covers St. Louis and the immediately surrounding inner-suburban communities. St. Louis sits along the Mississippi River where the Missouri joins it, on a stretch of the river that has long anchored the city's working profile — the Gateway Arch, completed in the 1960s, sits on the riverfront as a marker of the city's nineteenth-century role as the jumping-off point for westward expansion. The local economy reflects a substantial concentration of corporate headquarters, healthcare, biomedical research (the city is home to several large medical centers), and a long-running brewing and food-processing base. The 314 footprint covers the city itself.

Records linked to 314 numbers in the directory often include other Missouri cities — Columbia, Kansas City, O'Fallon, Sedalia, and Springfield among them. None of those are inside the 314 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Missouri and addresses linked across multiple cities. The directory currently documents 607 distinct prefixes within 314 in detail, a working subset of the prefix population the code carries.

St. Louis's home values come in well below the US median, with median household income running well below the national figure — readings shaped heavily by the city's long-running fiscal and population transitions through the late twentieth and early twenty-first centuries. The city's median age sits close to the US reading, and population places St. Louis among the larger cities in the Midwest, the historical anchor of an extensive metropolitan region that extends across the Mississippi into Illinois.