Telephone
Phone Validation API

Validate phone numbers
in real time

Improve your contact rate and clean your lists with Telephone's industry-leading phone number validation and verification API.

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No credit card required

https://api.telephone.dev/v1/validate
phone=
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Trusted by the world's best engineering teams

SalesforceGooglePepsicoWells FargoLinkedInParamountUnited AirlinesMcKinseySalesforceGooglePepsicoWells FargoLinkedInParamountUnited AirlinesMcKinsey

API benefits

Powerful phone validation and verification at your fingertips.

Fake & invalid number detection
Identify fake, invalid, and disposable phone numbers before they enter your database. Keep your contact lists clean and reliable.
Carrier & line type identification
Detect the carrier and line type — mobile, landline, VoIP, toll-free — so you can route communications the right way.
190+ countries supported
Validate and verify phone numbers from around the world without being an expert in international telephony formats.
Real-time validation
Validate numbers synchronously or asynchronously in real time. Integrate directly into your sign-up and checkout flows.
Location & geo data
Get geographic information about a phone number including country, region, city, and timezone details.
Bank-level security
Every interaction is secured via 256-bit SSL encryption. SOC 2 Type II and GDPR compliant out of the box.

Built for developers
by developers

190+countries
Built for global coverage
A global architecture that ensures fast, reliable, and redundant service with industry-standard data sovereignty and privacy.
10K+req/s
Built for scale
Whether you have 10 or 10,000 requests per second, our infrastructure scales automatically to meet your needs.
<50mslatency
Built for blazing speed
Milliseconds matter. Our edge network delivers sub-50ms response times for phone validation queries worldwide.
99.99%uptime
Built for reliable uptime
Public companies, financial institutions, airlines, and governments trust us in production with enterprise SLAs.

API Response Examples

See exactly what you get back from the API.

response.json
{
  "phone": "14154582468",
  "valid": true,
  "format": {
    "international": "+14154582468",
    "national": "(415) 458-2468"
  },
  "country": {
    "name": "United States",
    "code": "US",
    "prefix": "+1"
  },
  "carrier": {
    "name": "Verizon",
    "type": "mobile"
  }
}

Frequently asked questions

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SOC 2 Type II
GDPR Ready
99.99% Uptime SLA