517 Area Code: Lansing, Michigan

The 517 area code covers central and south-central Michigan, with Lansing — the state capital — as its primary city. Lansing sits at the confluence of the Grand and Red Cedar rivers in central Michigan, organized around the Michigan State Capitol and a downtown anchored by state government employment. Michigan State University's main campus occupies a substantial slice of East Lansing immediately adjacent. The 517 footprint extends through Jackson, Adrian, Hillsdale, and the surrounding small cities and farming counties of south-central Michigan.

In records the directory has compiled for 517 numbers, other Michigan cities — Ann Arbor, Detroit, Flint, and Grand Rapids — recur frequently. None of those are inside the 517 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Michigan and addresses linked across multiple cities. The directory currently documents 386 distinct prefixes within 517 in detail, a working subset of the prefix population the code carries.

Lansing's home values come in well below the US median, in line with broader central Michigan pricing. Median household income runs notably below the national figure, the city's median age sits a few years under the US reading, and population places Lansing among the smaller state-capital cities by total headcount but substantial enough to anchor a regional economy organized around state government, the university, the General Motors operations in the broader Lansing region, and the surrounding south-central Michigan counties.