What is a Phone Validator API?
A phone validator API (also called a phone number lookup API) is a web service that accepts a phone number as input and returns structured data about its validity, line type, carrier, and geographic location — all in real time. RealValidito’s phone validator API processes any US or Canada phone number in under 1 second and returns a JSON response with everything you need to verify, enrich, and act on contact data.
Businesses use the phone validation API to screen contact lists before marketing campaigns, validate numbers at web form entry, enrich CRM records with carrier and line-type data, and support their TCPA compliance by identifying mobile lines before SMS outreach.
What Does the RealValidito Phone Validator API Return?
Every API call to the RealValidito phone validation endpoint returns the following fields:
- Valid / Invalid — Whether the number is properly formatted and active
- Line Type — Mobile, landline, VoIP, toll-free
- Carrier Name — Current serving carrier (e.g. Verizon, AT&T, T-Mobile)
- Country — US or CA
- State / Region — Geographic state or province
- City — City associated with the number’s area code
- Time Zone — Time zone of the number’s registered location
How to Use the RealValidito Phone Validator API
- Register for a free account — Get 1,000 free phone validation credits, no credit card required.
- Get your API key and secret — Available under My Account → API Credentials immediately after signup.
- Make a request — Send an HTTP POST request with your API key, API secret and up to 1,000 numbers. The API accepts 10-digit US/Canada numbers in any standard format.
- Parse the JSON response — The API returns all validation and enrichment fields in a structured JSON object in under 1 second.
- Act on the data — Use the line type, carrier, and validity status to route records, suppress invalid numbers, or trigger personalized workflows.
Phone Validator API Use Cases
Web Form Validation
Integrate the phone validator API on form submit or on blur to reject invalid numbers at the point of entry. Prevent fake, mistyped, or invalid numbers from entering your database before they become a data quality problem.
SMS Campaign Eligibility
The TCPA requires written consent before sending marketing SMS messages to mobile numbers. Use the line type field to identify mobile numbers in your list — only mobile numbers can receive SMS. Filter out landlines and VoIP numbers before your SMS campaign to improve deliverability and maintain compliance.
CRM Data Enrichment
Many CRM records contain phone numbers with no associated metadata. Run your contact database through the phone validator API to append carrier name, line type, state, and time zone to every record — enabling better segmentation, scheduling, and routing.
Bulk Phone Number Validation
Upload a CSV file of phone numbers through RealValidito’s bulk validation interface and receive enriched output for every record. Ideal for one-time database cleanses or pre-campaign list audits. Upload files of up to 50,000 rows each; split larger lists into several files.
Phone Validator API Pricing
RealValidito offers 1,000 free phone validation API credits to every new account — no credit card required. After your free credits are used, credits are available on a pay-as-you-go basis. Larger credit packages cost less per lookup. See the full pricing page for details.
Frequently Asked Questions — Phone Validator API
Is the phone validator API RESTful?
Yes. RealValidito’s phone validator API is a standard REST API: lookups are sent as HTTP POST (JSON or form) and answers come back as JSON. It is compatible with any programming language or platform that can make HTTP requests — PHP, Python, JavaScript, Java, Ruby, and more.
How fast is the API response?
The phone validator API returns results in under 1 second for the vast majority of requests. Our services are hosted in the cloud and we aim for 99.9% availability, making it suitable for real-time form validation and high-volume batch processing alike.
Does the API support US and Canada phone numbers only?
Yes. RealValidito’s phone validator covers US and Canada phone numbers (NANP format). It validates 10-digit numbers and returns carrier, line type, and geographic data specific to the North American Numbering Plan.
Can I validate phone numbers in bulk via the API?
Yes. For batch validation, RealValidito offers a bulk upload interface (CSV format) in addition to the real-time API endpoint. The API endpoint itself is also suitable for high-volume programmatic batch processing by sending up to 1,000 numbers per request.