Area code 231 — Michigan
Area code 231 is in Michigan. Time zone, overlays, counties and ZIP codes.
| Location | 231, 262, 270, 321, 337, 347, 361, 469, 480, 484, 623, 631, 636, 646, 661, 662, 780, 832, 856, 858, 863, 865 |
|---|---|
| State | Michigan |
| Status | In service · since 1999 |
| Local dialing | 7 digits |
Format a 231 number
US numbers are written as (231) 555-0123 or 231-555-0123. From outside the US, dial +1 231 555 0123.
Is a call from 231 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.