Who is calling me?

Purpose

Find out who called from an unknown number. Check community reports, verify prefixes, and protect yourself from phone scams.

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

1. 1

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

2. 2

   Search

3. 3

   Risk level · Recent reports · Community comments

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.

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

This number has reports of unwanted calls

Automatically generated from community comments.

Limitations

Formats and supported calling codes only. They do not prove a number’s location, owner or active status. Some codes are shared.

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.

Use with the API

Community lookup for a number: risk score and level, approved report count, categories, verification, Spanish carrier data and a verified business name.

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

REQUEST_ID="$(uuidgen)" && [ -n "$REQUEST_ID" ] &&
curl --request POST 'https://api.nocall.io/v2/who-calls' \
  --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/who-calls',
    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/who-calls', {
  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);

{
  "data": {
    "tool": "who-calls",
    "result": {
      "phoneNumber": "+12025550123",
      "found": true,
      "updatedAt": "2026-10-01T09:30:00.000Z",
      "risk": {
        "score": 72,
        "level": "high"
      },
      "reportCount": 14,
      "categories": [
        "TELEMARKETING"
      ],
      "verified": false,
      "carrier": null,
      "verifiedBusiness": null
    }
  },
  "meta": {
    "requestId": "req_example",
    "unitsCharged": 1,
    "usage": {
      "periodStart": "2026-10-01",
      "unitLimit": 20,
      "unitsUsed": 3,
      "unitsRemaining": 17
    }
  }
}

• API reference ↗

Related guides

• Phone risk
• How much does it cost to call back?