AreaCode.fyi MCP Server

North American NANP area-code and phone-number intelligence for AI agents.

Documentation

areacode-mcp

North American (NANP) area-code & phone-number intelligence for AI agents.

An MCP server that gives Claude, Cursor, and other agents a small, trusted reference for US & Canada phone numbering — area codes, NANP validation, local time, city/state coverage, overlays, and scam/spoofing context. Backed by areacode.fyi, which publishes directly from the official NANPA numbering database. Every result includes a canonical areacode.fyi URL and the source date.

Scope. This is area-code-level reference and education — not a carrier/identity API. It does not return a caller's identity, exact location, or live/ported carrier, and caller ID can be spoofed, so a number's area code never proves who is calling. For caller identity you need a carrier-grade (LRN/HLR) provider.

Install

Run it with npx (no install needed) — add it to your client's MCP config.

Claude Desktop (claude_desktop_config.json) / Cursor (~/.cursor/mcp.json):

{
  "mcpServers": {
    "areacode": {
      "command": "npx",
      "args": ["-y", "@riv-lc/areacode-mcp"]
    }
  }
}

That's it — restart your client and the tools below are available.

Published on the official MCP Registry as io.github.riv-lc/areacode-mcp, and on npm.

Remote (hosted) — for ChatGPT, Claude.ai, and web clients

No install. Add the hosted server as a connector URL — same 8 tools, no key:

https://mcp.areacode.fyi/mcp

(legacy SSE clients: https://mcp.areacode.fyi/sse)

Tools

Tool	What it does
`lookup_area_code`	Country, state/province, cities, time zone, current local time, overlays, nearby codes
`lookup_phone_number`	Parse/validate a NANP number → area code, region, local time, E.164
`lookup_carrier`	Assigned carrier, line type (wireless/landline), and rate center for a number's NPA-NXX block (block-allocation data, not live/ported; covers nearly every US/Canada code)
`area_codes_for_city`	Area codes serving a city (optionally disambiguated by state)
`area_codes_for_state`	Every area code in a US state or Canadian province
`is_scam_area_code`	Scam/spoofing context for an area code + an aggregate of FTC Do Not Call complaints filed about numbers using that code
`check_number_reputation`	Unverified community signal (low / mid / high) plus public FTC Do Not Call complaint data (count, % robocalls, top subject) for a number
`explain_area_code_topic`	Source-backed explainers: neighbor spoofing, overlays vs splits, toll-free, area-code-vs-country-code, temporary numbers

Example prompts

"A lead entered phone number +1 702-555-0199. Where are they likely located and what time is it there?"
"I got a call from 469 — is that area code suspicious?"
"Which area codes cover Las Vegas?"
"Normalize this list of US/Canada numbers and flag any that are invalid or toll-free."
"Explain neighbor spoofing for a help-center article."

Configuration

Env var	Default	Purpose
`AREACODE_API_BASE`	`https://areacode.fyi`	Point at a different host (e.g. a self-hosted or staging API)

Data & sourcing

Tools call the public https://areacode.fyi/api/v1 JSON API, which reads the same dataset the site renders — sourced from the official North American Numbering Plan Administrator (NANPA) database and refreshed monthly. Each response carries source, canonical_url, and data_date so answers can cite where the data came from.

The check_number_reputation signal is unverified and crowd-sourced (low = people looked the number up; mid/high = it has user reports). It is never proof that a specific number is fraudulent.