Connect with confidence using powerful phone verification insights.

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Real Contact API

Real Contact API validates the phone number and provides a phone activity score, line type, name match, and a contact grade. Typical use cases for this phone verification API include lead contactability and reputation management.

Unlock Powerful Use Cases with Real Contact API

Lead Contactability and Prioritization

Prioritize leads with the best chance of contactability based on if the number is reachable, not disconnected or a temporary number, and belongs to the person who they say they are.

Reputation Management

Reach your target audience by managing your business phone reputation and avoiding outgoing calls to disconnected and temporary numbers.


Activity Score

Indicates if a phone is connected or disconnected. 

Name Match

A match or no match indicator whether the name provided on the lead form matches to the input phone number according to our database.

Contact Grade

A grade determining the quality of the lead and whether it is contactable.

Line Type

Provides seven unique line types including: mobile, fixed and non-fixed VoIP, landline, premium, toll-free and voicemail service.


Trestle’s Real Contact API offers several benefits for businesses and applications that require phone number verification. Here are some of the key advantages:

  • Increase Contact Rates

    Businesses already have a difficult time getting customers to pick up the phone. Real Contact API grades the lead based on its contactability, so by contacting the “A” grade, business will have a 2-3x higher contact rate compared to generic call patterns.

  • Confirm Compliance

    Real Contact API provides phone verification so businesses can confirm the phone still belongs to the person they intend to reach and that it has not changed hands or been reassigned. This ensures compliance with outbound dialers and text messaging right party contact requirements.

  • Minimize Lead Waste

    Real Contact API improves the efficiency and effectiveness of lead generation efforts. By targeting the right audience and generating higher-quality leads, businesses will have higher conversion rates because they are contacting people with the highest chance of converting.

  • Improve Sales and Agent Morale

    Real Contact API saves sales teams and agents time and resources by identifying the best leads. When answer rates improve, team morale also improves.

  • Enhanced Security

    Real Contact API verifies the phone number, so you can ensure that users are providing valid and active phone numbers, reducing the risk of fake accounts.

Why Trestle?