Reverse Phone Lookup API for Identity Verification and Data Enrichment

Turn a phone number into identity insight.

The Whitepages Pro reverse phone API connects phone numbers to names, addresses, emails, carrier type, and property owned to help businesses confirm identity, determine phone activity, prevent fraud, and append customer records with accurate phone intelligence.

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Whitepages is the trusted authority in people and property data since 1997 — and is the founder of Ekata and Hiya.

Authoritative Phone Intelligence at Scale

673M+

Phone & Address Records

454M+

Verified Email Addresses

350M+

Linked Identity Records

92M+

Property Owner Records

Key Data Signals Returned by the Reverse Phone API

Each API response can include:

Owner Name
Associated Addresses (current and historical)
Linked Email Addresses
Carrier Type (mobile, landline, VoIP)
Property Owned
Related Phone Numbers and Identities
Line Status (active, disconnected, or unknown)
Coming Soon

These fields make it easy to verify phone ownership, enrich contact lists, and connect phone data to real people and properties.

Why Teams Use the Whitepages Pro API for Reverse Phone Lookup

Phone Verification & Identity Match

Confirm whether a phone number belongs to a specific person. The API cross-references phones against name, address, and email data — helping you validate identities, reduce fraud, and maintain trustworthy customer records.

Reverse Phone Lookup

Retrieve cross-referenced name, address, and email data for mobile, landline, and VoIP numbers. Ideal for customer service, identity verification processes, lead qualification, or investigating unknown numbers.

Phone-to-Person Enrichment

Append your phone-based datasets with complete, cross-referenced identity details. Enrich a single number — or an entire call list — with name, current address, email, and even property ownership information for stronger connection and segmentation.

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Multi-Source Validation for Accuracy

Whitepages cross-references phone ownership using multiple authoritative data sources and its proprietary Identity Graph. This ensures consistency across devices, carriers, and data providers, reducing false positives and stale contact info.

Built for Identity, Contact & AI Workflows

The API delivers normalized, structured data designed for CRM systems, risk scoring models, and AI/LLM enrichment workflows. Integrate easily through RESTful endpoints, batch processing, or modern data pipelines.

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Use Cases

The Reverse Phone Lookup API supports a range of identity and data enrichment applications:

Phone Verification & Risk Scoring: Validate customer phone ownership during onboarding or checkout.
Call Attribution & Lead Qualification: Match inbound calls to known customers or leads.
Fraud Prevention: Flag mismatched or high-risk numbers before engagement.
Contact Enrichment: Add names, addresses, and emails to phone-based datasets.
Property & Ownership Insight: Connect phone numbers to property records for deeper customer context.

Trusted by 100s of Thousands of Businesses

500K+

Subscribers

250K+

Businesses

45K+

Real Estate Professionals

What Whitepages Customers Are Saying

Accurate & Reliable Results

"Whitepages delivers exactly what we need - reliable, high-quality data that accurately connects names, addresses, phones and relatives."

– Matthew, Founder, Justice Line

Fast and Easy Integration

"With the Whitepages API we were up and running in no time. It immediately streamlined how we validate contacts in our database."

– Dave, Liberty Mineral Partners LLC

Ideal for Customer Contact Validation

"Any way that we can stay connected with our customers is our bread and butter, and Whitepages is a very important part of that."

– Laurie

Ready to Verify and Enrich Phone Data?

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Trusted by 250,000 businesses and tens of millions of monthly users

FAQs

What is the Whitepages Pro Reverse Phone Lookup API?

The reverse phone lookup API connects phone numbers to names, addresses, emails, and property ownership. It supports phone verification, phone append, identity matching, and contact data enrichment for both consumer and business records.

Can I find out who called me or verify if a phone number belongs to a specific person?

Yes. These are some of the best uses for the Whitepages Pro API. Submit a phone number to trace who called or submit a name and phone number together. The API performs a real-time lookup to return matching identity data, which customers use to identify unknown callers or verify phone ownership.

What types of phone numbers are supported?

The phone number API supports mobile, landline, and VoIP numbers across the U.S. It identifies specific carriers, including Verizon, AT&T, T-Mobile, Sprint, and Google Voice. Results include carrier type classification, line type when available, and phone activity status (coming soon).

What is Phone-to-Person Enrichment?

Phone-to-Person Enrichment uses reverse phone lookup to take a phone number and append contact details, including name, address, email, and property ownership, to build a complete identity profile.

Does the API detect fraud?

Yes. The API helps detect phone fraud by returning identity data that you can cross-verify. Compare the phone number against the owner's name, address, and email to flag mismatches or high-risk numbers. This helps validate phone ownership and maintain accurate customer records.

How accurate is the data?

Whitepages maintains billions of linkages with 28+ years of data-matching expertise. Nationwide phone data is cross-referenced and continuously updated using multiple authoritative sources to ensure accuracy and recency. The same identity graph powers people search and reverse address lookup, keeping name, address, and phone numbers aligned.

Can I integrate the API with my existing systems?

Yes. The phone number API uses standard RESTful endpoints and returns JSON responses for easy integration into CRMs, analytics platforms, and AI workflows or pipelines. Batch enrichment is also supported.

How is pricing structured?

Whitepages Pro API pricing is based on monthly query volume. Choose a monthly plan or save 15% with an annual subscription. A free 14-day trial is available. For a custom quote, simply request API access, and a Whitepages team member will follow up within 1 to 3 business days.

Where can I find technical documentation?

Access the full API documentation here or by clicking “View API Documentation” above. It covers authentication, endpoints, request/response formats, and sample integrations.

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