Outbound calling in the US has changed significantly over the last few years. Due to the rise of robocalling and large-scale spam operations, the major US carriers (AT&T, Verizon, T-Mobile, etc.) now use dynamic reputation scoring to determine whether incoming calls are displayed as Spam Risk, Scam Likely, or similar warnings.
This reputation scoring is done by third-party analytics systems such as TNS, Hiya, and First Orion, based on call behavior across the entire carrier network. The result is that:
A number can be clean one day and marked as spam the next.
A new number can already have a reputation history due to previous ownership (number recycling is standard).
Spam status is not determined by the vendor that leased the number (including us).
This issue affects all dialers and VoIP providers in the US market.
Because of this, no provider can guarantee that a number will remain “clean,” and spam flagging is not considered a defect in the number itself.
Why We Cannot Refund Spam-Flagged Numbers
Spam labeling is not a static attribute of the number. It is a dynamic reputation score driven by:
Call volume and pacing
Pickup rates
Call duration patterns
Calling behavior across campaigns
Historical usage of the number before recycling
This reputation sits outside of our control, and outside of the control of any number vendor. For that reason, we cannot provide refunds for numbers that become marked as spam.
This applies regardless of where numbers are sourced.
What Does This Mean for Cost?
Maintaining a “clean” caller ID reputation in the US now requires ongoing monitoring and remediation, not just number purchasing.
In practice, US organizations operating compliant outbound calling typically spend:
$15–$20 USD per number per month
(This includes the number itself + monitoring + remediation)
This is now the industry standard cost of calling in the US.
Testing Numbers Before Purchase
To support better decision-making during number selection, we provide a simple number testing tool:
You register a mobile phone number within your account.
Before purchasing a new number, you can run a quick test call.
If your carrier labels the call as Spam Risk on your phone screen, you’ll see it immediately.
This allows you to avoid some numbers that already have a reputation issue before you buy them.
However, this does not detect future reputation changes, because reputation changes over time based on usage.
Advanced Monitoring & Remediation (Recommended)
For ongoing monitoring and cleanup, we recommend using NumberVerifier.
NumberVerifier provides:
Continuous monitoring across major carrier reputation systems
Alerts when a number becomes flagged
Remediation processes to regain reputation
Recommended rotation and usage patterns
Maintaining clean caller ID reputation is now a standard operational requirement for outbound sales teams in the US, and NumberVerifier is built specifically to handle this.
Integration Status
We are currently building an integration with NumberVerifier to make this easier:
You’ll be able to transfer numbers directly.
Spam status will be displayed inside Myphoner.
You’ll receive alerts when reputation issues occur.
We’ll share updates as soon as this is available.