1Lookup API
By 1Lookup
1Lookup is an enterprise data verification platform specializing in real-time validation of phone numbers, email addresses, and IP addresses.
Publisher review
1Lookup is an enterprise data verification platform specializing in real-time validation of phone numbers, email addresses, and IP addresses. It serves telecommunications, insurance, SaaS, and fraud prevention sectors by reducing fraudulent account creation and chargeback losses through instant data checks. The platform processes over 1 billion API calls and 10 million daily validations across 200+ countries with 99.97% accuracy and sub-300ms response times.
Its universal credit system consolidates phone, email, IP, and domain intelligence services into a single billing structure, making it particularly valuable for high-volume verification needs. The system draws directly from FCC and carrier databases, updating threat intelligence every minute to maintain current fraud detection capabilities. 1Lookup's infrastructure spans 15 global data centers and integrates with major platforms like Salesforce, Twilio, and Shopify through REST APIs. New accounts receive free credits to test the service, which handles spam detection via 50+ million report sources and email validation against 10,000+ disposable domains.
For phone numbers, it uses real-time HLR data for US carriers and machine learning models analyzing 50+ fraud indicators. While competitors like EmailVerify.io focus narrowly on email validation, 1Lookup distinguishes itself with multi-channel verification. However, its telecom-centric approach means less specialization in B2B contact data compared to sales intelligence platforms.
The service excels in operational fraud prevention but lacks built-in CRM workflows offered by marketing-focused alternatives. Pricing starts at $95/month for basic access, scaling with credit consumption across its validation services. Enterprises benefit from the platform's SLA-backed uptime and regulatory compliance, though some users may find the credit system complex compared to flat-rate competitors.
How it works
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Real-time phone validation
Verifies number activity and fraud risk in <300ms using FCC and carrier HLR data for US numbers
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Spam call detection
Analyzes 50+ million report sources with instant alerting for unwanted calls
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Email reputation scoring
Validates addresses in 245ms against 10,000+ disposable domains to protect sender reputations
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IP threat intelligence
Identifies risky addresses and VPNs in 156ms by monitoring 5,000+ services
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Machine learning fraud scoring
Uses 50+ indicators and minute-updated global database for risk assessment
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Universal credit system
Single billing structure covering all validation services across phone, email, and IP checks
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Global data center network
15 regional deployments ensure sub-300ms response times worldwide
Strengths and trade-offs
Strengths
- Processes 1 billion+ daily API calls with consistent sub-300ms response times across global operations.
- Maintains 99.97% accuracy by directly integrating FCC and carrier data feeds that update in real-time.
- Detects spam calls using a continuously updated database of 50+ million reported numbers.
- Offers consolidated billing through a universal credit system spanning phone, email, and IP validation services.
Trade-offs
- The credit-based pricing model requires careful consumption tracking compared to flat-rate competitors.
- Lacks native CRM workflow integration beyond API connections to platforms like Salesforce.
- Focuses more on telecom verification than B2B contact data enrichment capabilities.
- Enterprise features like skip tracing remain in development while competitors offer mature solutions.
Pricing context
Starts at $95/month with usage-based credits; free trial credits available for new accounts
Getting started with 1Lookup API
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Sign up
Create an account on the 1Lookup website to access the platform. Use your email address and set a secure password to complete the registration process.
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Connect API
Obtain your API key from the dashboard. Integrate the API with your application using the provided REST API documentation for seamless data validation.
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Load data
Prepare the phone numbers, email addresses, or IPs you want to validate. Ensure the data is formatted correctly according to the API requirements.
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Run validation
Send the prepared data to the 1Lookup API for validation. Wait for the response, which includes verification results and fraud risk scores.
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Monitor usage
Track your credit consumption through the dashboard. Adjust your validation volume or purchase additional credits as needed to maintain service continuity.
Frequently Asked Questions
What is 1Lookup API used for?
1Lookup API verifies phone numbers, emails, and IP addresses in real-time to prevent fraud. It's used by telecom, insurance, and SaaS companies to validate user data, detect spam, and reduce chargebacks. The service processes over 1 billion API calls daily with 99.97% accuracy across 200+ countries.
How accurate is 1Lookup's phone number validation?
1Lookup achieves 99.97% accuracy for phone validation by using real-time FCC and carrier HLR data. Its machine learning models analyze 50+ fraud indicators, while spam detection draws from 50 million reported numbers. US carrier checks complete in under 300ms with minute-by-minute database updates.
Does 1Lookup detect disposable email addresses?
Yes, 1Lookup screens emails against 10,000+ disposable domains in 245ms. Its reputation scoring helps prevent fraud by identifying temporary addresses often used in fake accounts. The system also validates email format and domain health, protecting sender reputations for businesses processing high volumes of signups.
How much does 1Lookup API cost?
1Lookup starts at $95/month with usage-based credits covering all validation services. New accounts get free trial credits. Pricing scales with API call volume across phone, email, and IP checks. Enterprises benefit from SLA-backed uptime but must track credit consumption unlike flat-rate alternatives.
How does 1Lookup compare to EmailVerify.io?
1Lookup offers multi-channel verification (phone, email, IP) while EmailVerify.io specializes only in email. 1Lookup processes 1B+ daily calls with 15 global data centers, but lacks some CRM features. It excels in telecom fraud prevention with real-time carrier data versus competitors' narrower focus.
What industries benefit most from 1Lookup?
Telecom, insurance, SaaS, and fraud prevention sectors use 1Lookup most. Its real-time validation reduces fake accounts and chargebacks. High-volume businesses benefit from sub-300ms global response times and consolidated billing. The API integrates with Salesforce and Shopify but has less B2B contact data than sales platforms like ZoomInfo.
Alternatives
- EmailVerify.io ↗
- Plauti ↗
How 1Lookup API compares
Direct head-to-head against 2 competitors. Picked by 7wData.
1Lookup API
- Pricing
- Starts at $95/month with usage-based credits; free trial credits available for new accounts
- Target
- 1Lookup is an enterprise data verification platform specializing in real-time validation of phone numbers, email addresses, and IP addresses.
- Strength
- Processes 1 billion+ daily API calls with consistent sub-300ms response times across global operations.
- Watch for
- The credit-based pricing model requires careful consumption tracking compared to flat-rate competitors.
EmailVerify.io
- Pricing
- $49/month for 10k verifications
- Target
- Email verification for marketers
- Deployment
- Cloud
- Strength
- Deep deliverability checks
- Watch for
- Limited integrations
Plauti
- Pricing
- Custom/Contact sales
- Target
- CRM data quality
- Deployment
- CRM-native
- Strength
- Real-time duplicate prevention
- Watch for
- CRM-specific focus
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Sources
Reporting on this tool draws on these publicly available sources.