Where is this area code from?

Purpose

Type a number or a prefix to see the province, city or area it belongs to, the type of line and what calling it costs.

Requirements

Anyone can read these guides, no account needed. Some tools require Pro, as indicated in each guide.

Type a phone number or just its first digits. We look it up in the official numbering plan and tell you which area it belongs to, what type of line it is and what calling it usually costs.

How to use it

1. 1

   Open tool

2. 2

   Type a phone number or just its first digits. We look it up in the official numbering plan and tell you which area it belongs to, what type of line it is and what calling it usually costs.

3. 3

   Check

4. 4

   Read the available fields alongside their limitations. An empty result does not prove safety or identify a person.

Synthetic example

+44 1632 960123

Interpret the result

Read the available fields alongside their limitations. An empty result does not prove safety or identify a person.

No. It tells you the area the number was assigned to. Landlines can be moved to another place and internet telephony numbers can be used anywhere, so it is a hint, not a location.

Mobile ranges are national: the first digits only say that it is a mobile line, not where it was issued or who the operator is today.

Yes. It comes from the numbering plan that the country’s regulator or the ITU publishes, and it is updated when the plan changes.

Limitations

Indicative information from published numbering plans. It describes the type of number, never the person or company behind it.

Troubleshooting

If the input is invalid, check its format and country. Retry connection errors; respect the waiting period when a limit is reached.

Enter a valid phone number or prefix.

We couldn’t check it right now. Please try again in a moment.

Use with the API

Where a prefix or number belongs: an exact numbering range, up to 8 suggestions, a foreign code, or no match.

Send the JSON body to the tool's own route, or to POST /v2/tools with the tool field added. Both routes return the same result.

POST https://api.nocall.io/v2/prefix-origin
POST https://api.nocall.io/v2/tools  {"tool":"prefix-origin","phone":"910","country":"ES"}

REQUEST_ID="$(uuidgen)" && [ -n "$REQUEST_ID" ] &&
curl --request POST 'https://api.nocall.io/v2/prefix-origin' \
  --header "Authorization: Bearer $NOCALL_API_KEY" \
  --header 'Content-Type: application/json' \
  --header "Idempotency-Key: $REQUEST_ID" \
  --data '{"phone":"910","country":"ES"}'

import json
import os
import urllib.request
import uuid

api_key = os.environ.get('NOCALL_API_KEY')
if not api_key:
    raise SystemExit('Set NOCALL_API_KEY')

request = urllib.request.Request(
    'https://api.nocall.io/v2/prefix-origin',
    method='POST',
    data=json.dumps({'phone': '910', 'country': 'ES'}).encode(),
    headers={
        'Authorization': 'Bearer ' + api_key,
        'Content-Type': 'application/json',
        'Idempotency-Key': str(uuid.uuid4()),
    },
)
with urllib.request.urlopen(request, timeout=30) as response:
    result = json.load(response)
print(result['data']['result'], result['meta']['unitsCharged'])

import { randomUUID } from 'node:crypto';

const requestId = randomUUID();
const apiKey = process.env.NOCALL_API_KEY;
if (!apiKey) throw new Error('Set NOCALL_API_KEY');

const response = await fetch('https://api.nocall.io/v2/prefix-origin', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer ' + apiKey,
    'Content-Type': 'application/json',
    'Idempotency-Key': requestId,
  },
  body: JSON.stringify({ phone: '910', country: 'ES' }),
});
const result = await response.json();
if (!response.ok) throw new Error(result.error?.code ?? 'request_failed');
console.log(result.data.result, result.meta.unitsCharged);

{
  "data": {
    "tool": "prefix-origin",
    "result": {
      "kind": "match",
      "national": "910",
      "row": {
        "prefix": "910",
        "serviceClass": "geographic",
        "costClass": "standard",
        "geography": "Madrid",
        "indexable": true
      },
      "complete": false,
      "planLoaded": true,
      "numberType": null,
      "foreignCode": null
    }
  },
  "meta": {
    "requestId": "req_example",
    "unitsCharged": 1,
    "usage": {
      "periodStart": "2026-10-01",
      "unitLimit": 20,
      "unitsUsed": 3,
      "unitsRemaining": 17
    }
  }
}

• API reference ↗

Frequently asked questions

Related guides

• How much does it cost to call back?
• Who is calling me?