Phone Number Validation API: The Complete Guide (Free Tier Available)

#webdev #api #python #javascript

Building a form with a phone number field? Tired of fake numbers slipping through your validation? Here's how to add rock-solid phone validation in under 5 minutes — for free.

Why Basic Regex Isn't Enough

Most developers start with a regex like ^\+?[0-9]{10,15}$. But this misses:

❌ Invalid country codes (+999)
❌ Numbers that are syntactically valid but don't exist
❌ No carrier or line type info (mobile vs landline)
❌ No formatting standardization

A proper validation API handles all of this.

Phone Validator Pro API

RapidAPI link: https://rapidapi.com/adunaev8419/api/phone-validator-pro1

Returns: carrier, country, line type (MOBILE/LANDLINE/VOIP), E.164 format, timezone.

Free tier: 30 requests/hour — enough for most projects.

Python Example

import requests

url = "https://phone-validator-pro1.p.rapidapi.com/validate"
headers = {
    "X-RapidAPI-Key": "YOUR_KEY",
    "Content-Type": "application/json"
}

r = requests.post(url, json={"phone": "+79001234567"}, headers=headers)
print(r.json())
# {
#   "is_valid": true,
#   "country": "Russia",
#   "carrier": "Tele2",
#   "line_type": "MOBILE",
#   "e164_format": "+79001234567",
#   "timezone": "Europe/Moscow"
# }

JavaScript / Node.js Example

const response = await fetch('https://phone-validator-pro1.p.rapidapi.com/validate', {
  method: 'POST',
  headers: {
    'X-RapidAPI-Key': 'YOUR_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ phone: '+447911123456' })
});

const data = await response.json();
console.log(data.line_type); // "MOBILE"
console.log(data.country);   // "United Kingdom"

Batch Validation

Need to clean a list of numbers? Use the /batch endpoint:

phones = [
    {"phone": "+79001234567"},
    {"phone": "+447911123456"},
    {"phone": "+12025551234"}
]

r = requests.post(
    "https://phone-validator-pro1.p.rapidapi.com/batch",
    json={"phones": phones},
    headers=headers
)
results = r.json()
# Returns validation result for each number in one call

cURL

curl -X POST "https://phone-validator-pro1.p.rapidapi.com/validate" \
  -H "X-RapidAPI-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"phone": "+79001234567"}'