📞Area Code 231 — Michigan
US area code 231 serves Michigan. See the full profile: state, neighboring area codes, and lookup API.
Key facts
Area code231
State / territoryMichigan
Other codes in state248, 269, 313, 517, 586, 616, 679, 734
Machine API (x402)
$0.001 / callThe same query is available to AI agents as a paid JSON endpoint — pre-configured for this subject:
GET /api/v1/databases/area-codes?code=231 HTTP/1.1
Host: agenttools-hub.vercel.app
→ 402 (x402 payment required)
→ 200 {"tool": "databases/area-codes", "result": { "value": 231, "answer": "Area code 231 — Michigan" }}Frequently asked questions
Area code — Area Code 231 — Michigan?
Area Code 231 — Michigan: Area code — 231.
State / territory — Area Code 231 — Michigan?
Area Code 231 — Michigan: State / territory — Michigan.
Other codes in state — Area Code 231 — Michigan?
Area Code 231 — Michigan: Other codes in state — 248, 269, 313, 517, 586, 616, 679, 734.
Do overlay codes appear separately?
Yes — overlay codes (two codes serving the same region) are listed as distinct entries, each mapped to its state.
Does this cover Canada and the Caribbean?
The dataset focuses on US area codes. Canadian and Caribbean NANP codes are planned for a future expansion.