Calls & numbers

Carrier lookup

API · ProBeta2026-10-28

Coverage: Areas come from the official numbering plan of each edition’s country. Spain lists a province for every landline range; many other countries list their area codes and cities. Mobile numbers have no area in any country, and a few countries do not publish a plan we can read yet: there we only show the type of line.

Open tool

On this page

Purpose

Enter a phone number to view approved, privacy-bounded facts.

Operator information · Type: · Province:.

Requirements

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

Enter the full number with its international code. For a national number, first check the edition country or country selector.

How to use it

Open tool
Enter the full number with its international code. For a national number, first check the edition country or country selector.
Check
Read the available fields alongside their limitations. An empty result does not prove safety or identify a person.

Synthetic example

Invented example, not a real lookup. Do not call or open its links.

+44 1632 960123

Interpret the result

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

Operator information · Type: · Province:.

This number is not in our database. Be the first to report.

Only reviewed or public technical facts are shown. Private identities and protection signals stay hidden.

Limitations

Only reviewed or public technical facts are shown. Private identities and protection signals stay hidden.

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

Information based on community reports and automated analysis. It may contain errors or be out of date, and is not legal advice or a verified accusation against the number's owner.

Troubleshooting

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

Invalid phone number

The security check or API connection did not respond in time. Try again in a few seconds.

You've used all phone-number lookups allowed today. Please try again tomorrow.

Use with the API

Needs an API key and credits. Each completed call costs 1 credit, even when there is no data. An active Pro account includes 20 credits per UTC calendar month, shared by every API route and spent first; unused monthly credits do not roll over. Credits bought on your account page work without Pro and never expire.

Errors are never charged: 401 invalid_api_key (missing or invalid key), 403 pro_required (no Pro credits and no purchased credits), 422 invalid input, 429 quota_exceeded (no credits left), rate_limit_exceeded or ai_busy (the AI of sms-check is at capacity), 503 tool_warming (the data is still being prepared) or tool or provider unavailable. After a 429 or 503, retry once the seconds in the Retry-After header have passed.

Assigned operator and numbering data from the Spanish CNMC registry, or from the regulator data imported for other countries (operator, number type, prefix, region, cost category). found is true only when an operator is named.

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/carrier-lookup
POST https://api.nocall.io/v2/tools  {"tool":"carrier-lookup","phone":"+12025550123","country":"US"}

Parameters

Name	Type	Required	Description
phone	string (1–40)	Yes	Phone number in E.164 (+34…) or national format.
country	string (enum, 56)	No (default: "ES")	Two-letter country code, for example ES or US, used for national input and for the country's data.

REQUEST_ID="$(uuidgen)" && [ -n "$REQUEST_ID" ] &&
curl --request POST 'https://api.nocall.io/v2/carrier-lookup' \
  --header "Authorization: Bearer $NOCALL_API_KEY" \
  --header 'Content-Type: application/json' \
  --header "Idempotency-Key: $REQUEST_ID" \
  --data '{"phone":"+12025550123","country":"US"}'

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/carrier-lookup',
    method='POST',
    data=json.dumps({'phone': '+12025550123', 'country': 'US'}).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/carrier-lookup', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer ' + apiKey,
    'Content-Type': 'application/json',
    'Idempotency-Key': requestId,
  },
  body: JSON.stringify({ phone: '+12025550123', country: 'US' }),
});
const result = await response.json();
if (!response.ok) throw new Error(result.error?.code ?? 'request_failed');
console.log(result.data.result, result.meta.unitsCharged);

Example response (200)

This is the documented example from the API reference. Lookups use a fictional number, and aggregates and AI answers show the shape of the result, not live data.

{
  "data": {
    "tool": "carrier-lookup",
    "result": {
      "phoneNumber": "+12025550123",
      "found": false,
      "updatedAt": null,
      "carrier": null
    }
  },
  "meta": {
    "requestId": "req_example",
    "unitsCharged": 1,
    "usage": {
      "periodStart": "2026-10-01",
      "unitLimit": 20,
      "unitsUsed": 3,
      "unitsRemaining": 17
    }
  }
}

Result fields (data.result)

Field	Type	Description
phoneNumber	string	The number in E.164 format.
found	boolean	Whether NoCall has real data for this number: a named operator, a block-list or directory entry, approved reports or a verified business. Prefix data alone does not count. false is still a completed result.
updatedAt	string \| null	When the data was last updated (ISO 8601), or null.
carrier	object \| null	Operator data from the Spanish CNMC registry or the country's regulator: operator, number type, prefix, region and cost category. null when unknown.

API reference