# NumberIntel NPA Area Code Lookup

> NumberIntel NPA Area Code Lookup is a paid API for AI agents from numberintel.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns geographic, timezone, and classification metadata for a given 3-digit NANP area code

## Facts

- Endpoint: GET https://numberintel.dev/v1/npa
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numberintel-npa-area-code-lookup-d2157baa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nWoWHK9ciGE1leoa7VOZ9

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability numberintel-npa-area-code-lookup-d2157baa
```

Example prompt: What state, region, and timezone does area code 602 belong to, and is it a toll-free or premium-rate number?

## When to prefer this

Use this endpoint when you need structured metadata about a NANP area code prefix rather than a full phone number — particularly when you need timezone, state/region, toll-free status, or premium-rate classification with pay-per-call pricing and no subscription required. Prefer this over full phone number validation APIs when only the NPA prefix is available.

## Known failure modes

- Missing or invalid 'npa' query parameter returns an error — must be exactly 3 digits
- Non-NANP area codes (outside US, Canada, Caribbean) may return no results
- Payment failure via x402/USDC on Base will block the request
- Malformed area code strings (letters, fewer/more than 3 digits) will be rejected

## How this service works

NANP area code lookup: region, state, country, timezones, current local time, toll-free/premium/geographic flags. Static authoritative dataset (450 NPAs), sub-10ms responses.

## Output

A JSON object containing the area code's state (e.g. 'US-AZ'), region name (e.g. 'Arizona'), country code, list of applicable timezones, current local time per timezone, and boolean flags indicating whether the number is toll-free, geographic, or premium-rate.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "npa"
     ],
     "properties": {
      "npa": {
       "type": "string",
       "description": "3-digit NANP area code, e.g. 480"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "npa": {
       "type": "string"
      },
      "state": {
       "type": "string"
      },
      "region": {
       "type": "string"
      },
      "country": {
       "type": "string"
      },
      "timezones": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "toll_free": {
       "type": "boolean"
      },
      "geographic": {
       "type": "boolean"
      },
      "premium_rate": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "npa": "602",
  "state": "US-AZ",
  "region": "Arizona",
  "country": "US",
  "timezones": [
   "America/Phoenix"
  ],
  "toll_free": false,
  "geographic": true,
  "local_time": [
   {
    "tz": "America/Phoenix",
    "time": "Sun 20:30"
   }
  ],
  "premium_rate": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numberintel-npa-area-code-lookup-d2157baa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numberintel.dev](https://www.zero.xyz/host/numberintel.dev/llms.txt)