810 area code — Flint, MI geographic

Data: NANPA public reports, current as of July 28, 2026.

Phone numbers beginning 810 are registered to the Flint area of Michigan (Eastern time zone). The code entered service on December 1, 1993. Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.

The code currently holds 503 working prefixes, held by 35 different carriers. Of these, 369 are pooled prefixes shared by multiple carriers. Numbers are anchored to 49 rate centers — billing localities that fix where each prefix belongs.

Practical takeaway: the 810 label narrows geography to Michigan, the prefix narrows it to a locality, and neither authenticates a caller. Verification means calling back through a number you found yourself.

The code was carved out of 313 (1993). As demand grew it in turn gave rise to 248 (1997), 586 (2001).

The current NANPA exhaust forecast is 2Q 2056.

Local calls inside 810 are dialed 10D; 1+10 digit permissible at service provider discretion..

Largest localities in 810

FAQ

Will 810 run out of numbers?

NANPA's current forecast projects exhaust in 2Q 2056 — decades of capacity remain.

Why am I getting spam calls from 810 numbers?

Scammers spoof recognizable area codes so calls look local or familiar. A displayed 810 number does not prove the call originated there — see our guide to spotting spoofed calls.

Where is a 810 number from?

810 is assigned to Flint and surrounding areas of Michigan in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.

Is 810 a toll-free number?

No. 810 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.