Why Do Phone Validation Checks Need To Go Beyond Valid and Invalid?

Most teams treat phone verification as a binary check: valid or invalid. 

In practice, contactability is the real bottleneck. A number can be formatted correctly yet remain disconnected, inactive, or exhibit temporary VoIP (Voice over Internet Protocol) behavior that quietly reduces contact rates and drains operational capacity. 

Who is Trestle and what do they do? 

To address this, PX now supports Trestle’s phone validation service in the platform. It validates phone numbers globally and returns metadata you can use to decide how each lead should be handled before routing, dialing, or messaging.  

The service is used across industries, including financial services, telecommunications, marketing, healthcare, insurance, and software services, to improve data quality and operational efficiency. 

You can access these signals through a real-time API inside the PX platform.

What do PX and Trestle enable together? 

With Trestle now supported in PX, customers can validate phone numbers globally and receive rich data/ signals that help determine: 

1) Phone Activity Score (0–100): The Phone Activity Score indicates whether a phone number appears connected and active, or disconnected/inactive. 

Recommended filtering rules (when you want a clear operational split): You should prioritize dialing the phone numbers with scores greater than or equal to 70 and weed out disconnected/inactive phone numbers with scores less than or equal to 30. 

2) Validity checks: It indicates whether a number is valid and assigned to a carrier or in service. 

3) Carrier: Identifies carriers globally, including MVNOs. 

4) Line type: Returns seven line types, including mobile, landline, fixed VoIP, non-fixed VoIP, premium, toll-free, and voicemail service.  

5) Prepaid status: Indicates whether a mobile number is part of a prepaid plan. 

How can marketing teams use phone validation signals to improve conversions? 

Most teams feel the impact of phone quality in the same places: the dialer, the messaging layer, and the follow-up process. Phone Validation helps you tighten those steps before wasted attempts show up in reporting. 

Start with the basics: make sure the number is usable. You can confirm whether a number is connected, assigned, and in service, and keep formatting consistent so leads don’t break when they enter routing and dialing. 

Next, use phone metadata (basic details like carrier, line type, and prepaid status) to remove obvious junk and, where available, use subscriber-related details to add helpful context. That makes it easier for sales teams to follow up and convert, especially when you’re handling large lead volumes. 

It also helps with message delivery. Before you send an SMS or start a call, you can check that the number looks legitimate. Line type helps you separate mobile numbers from temporary VoIP (internet-based phone numbers) and landlines, and validation helps reduce delivery errors by confirming number format and service status. 

On the fraud side, these same signals help cut fake account creation and promo abuse. Temporary or suspicious numbers are a common pattern, and line type + carrier signals help you spot them earlier. 

And if your compliance setup calls for it, there’s an optional layer: Litigator Checks. This flag indicates whether a phone subscriber is associated with serial litigation under TCPA or similar regulations, available as an add-on based on your configuration and compliance needs. 

One of our PX clients used Trestle Phone Validation and Activity Scoring to reduce unreachable numbers and prioritize dial queues. Their appointment rate increased from 8% to 18% within just 3 weeks. 

How to set it up

Trestle Phone Validation is available in PX as an integrated verification service. You can enable it directly on the platform or contact your CSM to have it enabled for your campaigns. 

At PX, maintaining high lead quality is a platform standard. Adding Phone Validation and Activity Scoring is part of that commitment: keeping quality measurable, creating accountability for lead sellers for the leads they sell on PX, and giving lead buyers clearer signals before they spend.