Reverse Lookup &People Intelligence
Reverse lookup for US phone numbers, emails and IP addresses. A phone lookup returns the caller ID name for 10 credits (about $0.05 on Starter) or the full record for 25 (about $0.12), and nothing is charged when there is no match.
10 credits
Caller ID name
25 credits
Full record
0 credits
When no record is found
Try it free first: Free Reverse Phone Lookup
Find the likely owner behind a phone number. No signup needed.
To check that a number is valid before you search for its owner, use the phone validator. To see which carrier a number is on rather than who owns it, use the free carrier lookup.
Reverse Lookup Capabilities
Multi-source intelligence for complete information discovery
Phone Number Lookup
Find the name, street address, email, line type and Do Not Call flag listed for a US phone number.
Email Reverse Search
Find the name, postal address and phone numbers listed for an email address, with the Do Not Call flag on each phone.
Address & Property Intelligence
Get detailed property information, ownership history, resident data, and neighborhood intelligence. Access property records, tax assessments, and residential patterns.
People Search & Identity Resolution
Find person profiles including contact information, relatives, associates, employment history, and social connections across multiple data sources.
Business & Company Lookup
Access detailed business information including ownership, financial records, employee data, and corporate relationships. Business intelligence and due diligence data.
Multi-Source Data Aggregation
Combine caller ID records with public records and other sources in one result.
Reverse Lookup Use Cases & Results
Where teams use reverse phone and email lookups
Investigation & Due Diligence
Conduct thorough background investigations, verify identities, and perform due diligence research. Essential for legal professionals, investigators, and compliance teams.
- Background verification
- Identity confirmation
- Asset discovery
- Compliance checking
Sales & Lead Generation
Enhance lead qualification by finding complete contact information, company details, and decision maker profiles. Improve sales efficiency and conversion rates.
- Contact enrichment
- Decision maker identification
- Company intelligence
- Lead scoring
Fraud Prevention & Security
Verify customer identities, detect suspicious activities, and prevent fraud by cross-referencing multiple identity data points and historical patterns.
- Identity verification
- Fraud detection
- Risk assessment
- Pattern analysis
People Finding & Reconnection
Locate missing persons, find old contacts, and reconnect with people using people search across multiple databases.
- People location
- Contact discovery
- Relationship mapping
- Historical tracking
Business Intelligence & Research
Gather competitive intelligence, research market opportunities, and analyze business relationships. Business data for strategic decision making.
- Market research
- Competitive analysis
- Business relationships
- Strategic intelligence
Debt Collection & Recovery
Locate debtors, find current contact information and assets, and improve collection success rates with debtor intelligence and skip tracing.
- Debtor location
- Asset discovery
- Contact updates
- Skip tracing
Reverse Lookup Market Insights
Industry research on people search, investigation, and identity verification trends
Investigation & Due Diligence Market
The background check industry grows at 8.6% annually.
Industries Using Reverse Lookup
Trusted across sectors for intelligence gathering and verification
Why Choose 1Lookup Reverse Search?
What one lookup gives you, and what it costs
One key for every lookup
Reverse phone, email and IP lookups run on the same API key as your phone, email and IP checks
Caller ID or the full record
Pay 10 credits (about $0.05 on Starter) for the caller ID name, or 25 (about $0.12) for name, address, email, line type and the Do Not Call flag
Nothing charged on a miss
You pay only when a record is found, and numbers outside coverage are never charged
Try a number free first
Run a US number through the free reverse phone lookup, then make the same call by API
Simple Reverse Lookup Integration
People intelligence with a single API call
// Reverse phone lookup
const response = await fetch('https://app.1lookup.io/api/v1/reverse-phone-lookup', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
phone_number: '2125550001',
lookup_source: 'premium'
})
})
// Response
{
"success": true,
"data": {
"request": { "type": "reverse_phone_lookup", "input": "2125550001", "processing_time_ms": 546 },
"metadata": { "credits_used": 25, "credits_remaining": 9956, "cache_hit": false },
"classification": { "matched": true },
"insights": {
"contact": {
"first_name": "Jane",
"last_name": "Doe",
"address": "123 Main St",
"city": "New York",
"state": "NY",
"zip": "10001",
"email": "jane.doe@example.com"
}
}
}
}Reverse Lookup API FAQ
Common questions about our intelligence platform
We support comprehensive reverse lookups for phone numbers, email addresses, physical addresses, names, and business information. Our platform can find detailed information about people, businesses, properties, and their interconnections across multiple data sources.
Each lookup runs when you request it, so the result reflects the record as it stands that day. You are charged only when a record is found, and nothing for a number outside coverage.
Phone lookups cover US numbers. The caller ID tier (10 credits) returns the name on the caller ID record. The full record (25 credits) returns the name, a second name where one is listed, company, street address and ZIP, email, line type and the Do Not Call flag.
The caller ID name costs 10 credits and the full record 25, and nothing is charged when no record is found. On Starter ($99 a month for 20,000 credits), that is about $0.05 for the caller ID name and $0.12 for the full record. Growth: about $0.04 and $0.09. Professional: about $0.03 and $0.08. Enterprise: about $0.02 and $0.05.
Reverse lookup is legal for identifying callers, verifying contacts and preventing fraud. It is not a consumer report, so our terms rule out using it for credit, insurance, employment, tenant screening or any other purpose governed by the FCRA. We support GDPR and CCPA data subject rights.
A single lookup returns while you wait, through the dashboard or the API. Large files run as a bulk job in the background and you download the results when it finishes.
Absolutely! Our REST API integrates easily with CRM systems, investigation platforms, and custom applications. We provide code examples, no-code integrations (Zapier, Make, n8n), and detailed documentation for connecting it to your workflows.
Results combine caller ID records with a consumer database built from public records and other commercial sources.
Yes, we support bulk reverse lookup processing for large datasets. You can upload files or use our batch API endpoints to process thousands of lookups efficiently with detailed reporting and export capabilities.
Technical Specifications
Phone coverage
US numbers
Caller ID name
10 credits
Full record
25 credits
No record found
0 credits
Interface
REST + JSON
Bulk
File upload
Start Your Intelligence Search Today
Find who a US number or email address is listed to, on the same API key as phone, email and IP checks.
7-day free trial • Setup in 5 minutes • Premium support