M
API Matrix

Phone Validation API

⭐ Beginner's Pick Phone / API Key Intermediate HTTPS CORS
Varies by plan (check documentation)
87 Score
Grade A
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Overview

Phone Validation by Abstract API lets you verify phone numbers from countries around the world with a single API call. It checks whether a number is valid, returns the carrier, line type (mobile, landline), and formats the number in standard ways. This is great for form validation or cleaning up customer databases.

💡

Beginner Tip

Pass the phone number in E.164 format (e.g., +14155552671) for the most reliable results. Always include the country calling code so the API knows which country to validate against.

Available Data

phone number validation
carrier information
country code
line type
Use case: Integrate validate phone numbers globally data into web and mobile applications

Example Response

JSON Response 
{
  "input": "[email protected]",
  "is_valid": true,
  "format_valid": true,
  "details": "Input passes all validation checks"
}

Field Reference

phone The phone number you submitted, returned as-is.
valid true if the number is structurally valid and dialable.
format.international Number in international E.164 format, e.g. +14155552671.
country.name Full country name associated with the number, e.g. United States.
type Line type: mobile, landline, voip, or unknown.
carrier The telecom carrier that owns the number, if detectable.

Implementation Example 

const url = "https://www.abstractapi.com/phone-validation-api";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

401 Unauthorized Missing or invalid API key in the query string.
✓ Sign up at abstractapi.com, copy your key, and pass it as ?api_key=YOUR_API_KEY.
is_valid: false for a real number The number was supplied without the country calling code.
✓ Always prefix the number with the country code, e.g. 1 for the US, 44 for the UK.
429 Too Many Requests You have exceeded the free-tier rate limit.
✓ Add a delay between requests or upgrade your plan for higher limits.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 15/20
🔒 Security 15/15
🛠 Developer XP 17/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS YES
Category Phone
Difficulty Intermediate
Verified: 2026-04-07

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