📞Area Code 603 — New Hampshire
US area code 603 serves New Hampshire. See the full profile: state, neighboring area codes, and lookup API.
Key facts
Area code603
State / territoryNew Hampshire
Other codes in state—
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=603 HTTP/1.1
Host: agenttools-hub.vercel.app
→ 402 (x402 payment required)
→ 200 {"tool": "databases/area-codes", "result": { "value": 603, "answer": "Area code 603 — New Hampshire" }}Frequently asked questions
Area code — Area Code 603 — New Hampshire?
Area Code 603 — New Hampshire: Area code — 603.
State / territory — Area Code 603 — New Hampshire?
Area Code 603 — New Hampshire: State / territory — New Hampshire.
Other codes in state — Area Code 603 — New Hampshire?
Area Code 603 — New Hampshire: Other codes in state — —.
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.