Comprehensive Phone Intelligence: Interzoid's Phone Number Profile API
Validating phone numbers and understanding their risk profile is essential for CRM data quality, marketing effectiveness, and fraud prevention. Whether you need to verify customer contact information, detect suspicious registrations, or optimize campaign timing across time zones, having detailed phone intelligence is critical. Instead of managing multiple validation services and carrier databases, Interzoid's Phone Number Profile API provides comprehensive phone intelligence including standardized formatting, carrier details, phone type classification, time zone information, validity verification, and detailed risk assessment in a single API call. This guide explains what it provides, why it's useful, and how to get started with your own API key.
- 📘 API Reference: Phone Number Profile API
- 🔑 Register for an API Key: www.interzoid.com/register-api-account
- 📖 Docs: Interzoid Documentation
What It Provides
The API leverages multiple carrier databases, real-time validation services, and advanced risk intelligence sources to deliver comprehensive phone number profiling and security assessment. For each phone number you submit, you receive:
- Standardized E.164 formatting for consistent data storage
- Country of registration
- Organization name (for public/corporate numbers)
- Phone type classification (Landline, Mobile, VOIP)
- Telecommunications carrier/provider
- Time zone information with UTC offset
- Regional location (city and state/province)
- Validity verification status
- Comprehensive risk assessment with detailed risk signals
This comprehensive intelligence helps you improve CRM data quality, optimize marketing campaigns, prevent fraud, and enhance customer communication strategies across your business systems.
Use Cases
- CRM Data Quality: Validate and standardize phone numbers during data entry, cleanse existing databases with accurate formatting, and enrich contact records with carrier and location information for improved data quality and reliability.
- Marketing Optimization: Segment contacts by phone type and time zone, optimize call timing for better connection rates, and filter out high-risk numbers to improve campaign ROI while maintaining compliance with regulations.
- Fraud Prevention: Detect suspicious phone numbers during registration, prevent account takeovers with comprehensive risk scoring, and identify potential fraud attempts before they impact your business operations.
- Customer Communication: Route calls intelligently based on phone type, respect time zones for outbound communications, and verify numbers before sending SMS to reduce bounce rates and communication costs.
How to Call the API
Base endpoint:
https://api.interzoid.com/getphoneprofile
Required parameters:
license- your API keylookup- phone number to analyze
Example request:
https://api.interzoid.com/getphoneprofile?license=YOUR_API_KEY&lookup=650-253-0000
Curl with header:
curl --header "x-api-key: YOUR_API_KEY" \ "https://api.interzoid.com/getphoneprofile?lookup=650-253-0000"
Example JSON response:
{
"Normalized": "+16502530000",
"Country": "United States",
"Organization": "Google Inc.",
"Type": "Landline",
"Carrier": "Pacific Bell",
"TimeZone": "Pacific Time (UTC-8/-7 DST)",
"Region": "Mountain View, California",
"IsValid": "Yes",
"RiskAssessment": "Risk Score: 85 - This is a legitimate Google corporate headquarters number, but has been spoofed by scammers. Risk signals: Number frequently spoofed for phishing attempts, automated robocalls reported, some users report scam calls using this number.",
"Code": "Success",
"Credits": "20085837"
}
Understanding Risk Assessment Scores
The API provides detailed risk assessments with scores ranging from 0-99 that help you make informed security and business decisions. Here are real-world examples showing different risk levels:
- Low Risk (Score: 92): Clean mobile numbers with no spam reports or fraudulent activity detected receive high scores indicating they are "active and properly registered" - excellent for legitimate customer communications and highly trustworthy.
- Medium Risk (Score: 85): Corporate numbers like Google's headquarters may show legitimate usage patterns but include warnings about spoofing activity, noting "number frequently spoofed for phishing attempts" - valid numbers that require awareness of potential impersonation.
- High Risk (Score: 35): VOIP numbers with documented abuse history will show multiple risk signals including "associated with spam reports, frequently recycled number, identified in telemarketing databases" - strong indicators to implement additional verification or blocking measures.
Each risk assessment provides specific context and detailed signals about why a number receives its rating, enabling sophisticated decision-making rather than simple accept/reject rules.
Phone Type Analysis Examples
The API accurately classifies phone numbers by type and provides relevant intelligence for each category. Here are examples demonstrating the diversity of information available:
- Corporate Landline: Google headquarters number in Mountain View with Pacific Bell carrier, standardized to E.164 format +16502530000, includes organization name and time zone for proper business communication timing.
- Mobile Number: T-Mobile USA mobile in San Francisco with clean history and risk score of 92, properly registered with no spam reports, ideal for SMS marketing and customer outreach campaigns.
- High-Risk VOIP: Bandwidth.com VOIP number in New York with risk score of 35, showing multiple spam reports, frequent recycling, and telemarketing database presence requiring additional verification before engagement.
Getting Your API Key
You'll need to register for an Interzoid account to get an API key: www.interzoid.com/register-api-account. Once registered, you'll receive a license key with trial credits that you can use immediately to start validating phone numbers, assessing risk, and improving your data quality.
Best Practices
- Implement risk-based workflows rather than simple blocklists - use the detailed risk signals to make nuanced decisions about phone number acceptance and verification requirements.
- Cache phone profile data appropriately to reduce API calls while maintaining fresh risk intelligence for critical operations like account registration and high-value transactions.
- Use time zone information to optimize outbound call timing and respect customer preferences, improving connection rates and reducing complaints.
- Combine phone type and carrier data for sophisticated contact strategy optimization that routes communications through the most effective channels automatically.
- Store the standardized E.164 format for consistent data storage and reliable communication across all systems and international operations.
- Process existing databases in batch mode using Interzoid's no-code cloud batch tool for efficient high-volume phone number validation and enrichment.
- Always check the
Codefield in responses for proper error handling and validation of API calls. - Monitor your credit usage via the
Creditsfield returned in each response to manage costs effectively.
The Phone Number Profile API makes it easy to validate phone numbers, assess risk, optimize marketing campaigns, and prevent fraud with comprehensive phone intelligence in a single API call. Whether you're cleaning CRM data, detecting suspicious registrations, timing communications appropriately, or improving contact strategies, it provides the detailed intelligence you need to make smart decisions and protect your business. Start today by registering for an API key and adding powerful phone intelligence directly into your customer communication and security systems.