Are your business caller IDs labeled Spam Likely?

Check your phone number's reputation and monitor your business caller IDs in real time across AT&T, Verizon & T-Mobile. See which numbers are flagged Spam Likely or Scam Likely, get alerts, and work to remove the flags so your calls get answered.
Manage your business Caller ID reputation on the nation's top carriers
AT&T spam likely tagsVerizon Potential SpamTMobile Scam Likely

98% of Consumers send spam calls to voicemail

Number Verifier is a caller ID reputation monitoring service: we continuously check whether your business numbers are marked Spam Likely or Scam Likely across the major carriers and call-blocking apps, and alert you so you can act before answer rates drop.

What are the advantages?
  • Audit and keep track of your numbers’ flag status across all major carriers and call-blocking apps.
  • Monitor your numbers in real-time and see how your customers view them on different devices.
  • Receive alerts when your numbers get flagged so you can pull them out from rotation immediately.

Looking to increase your answer rates by 30-40%?

Number Verifier helps you keep track of your phone numbers to ensure their health and prevent them from being labeled as "Spam or Scam Likely". We ensure your customers can always reach you, increase your deliverability and secure your reputation. Here are some of the benefits of Number Verifier:

  • Monitor your phone numbers and prevent them from being flagged as spam
  • Increase your dialers call deliverability
  • Secure your Caller IDs Reputation
  • Lower your compliance risk

Don’t let your phone number be the reason you lose customers. With Number Verifier, you can protect your numbers and make sure you can always reach your customers — no matter what!

Reassigned or disconnected Numbers?

Ensure you’re reaching the right customers by discovering reassigned or disconnected numbers through the Reassigned Numbers Database.
RND Statistics as of

377M+

Disconnected Numbers in the RND Database

1174M+

Up to date TN Queries submitted

10M

Avg. RND Database Growth per Month

23M+

Avg. RND Database Changes per month

4%+

Valid queries submitted identified as disconnected

850M

Estimated total number of telephones in use

how it works

No credit card. No contract.

Check your caller IDs display in 3 easy steps:

Sign up for a free trial

Upload some of your numbers FREE and review your results and call tracking analytics.

See screenshots of your caller IDs

Receive actual mobile screenshots from carriers and operating systems.

Monitor your caller IDs in real-time

With our real-time dashboard and automated reporting, you won’t miss a beat.

Join the 1500+ companies who already trust Number Verifier

Stop the guessing and start verifying

4.9 out of 5 based on 458 reviews

"I discovered that 1/3 of my outbound numbers were labeled as spam with Number Verifier. We spend 120K + monthly on leads and were wasting $30,000 on unsuccessfully contacted leads. This was a game-changer."

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Joe Mogush
Xtimeshares.com

"My salespeople were all crying about the leads. We accused our lead vendors of selling fake leads. Number Verifier Showed me that 100% of my DIDs were labeled Scam Likely by ATT and about 30% on T-mobile. Our answer rates are now back to normal."

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Tom Schoger
Rate Plus Funding

"As an insurance provider, I never imagined our phone numbers would be labeled spam. I was utterly shocked to see almost all of our numbers were flagged as spam on at least one mobile phone carrier."

Mik Moranz
Reliasure Insurance Services
Support

Frequently asked questions

Everything you need to know about the product and billing.
Why is my business number showing as "Spam Likely" or "Scam Likely"?
Carriers and call-blocking apps score every phone number's reputation. When a number is dialed heavily, reported, or shares a range with flagged numbers, it can be labeled "Spam Likely" or "Scam Likely" — even for a legitimate business. Once that happens, most people send the call to voicemail. Number Verifier shows you exactly which of your numbers are flagged, on which carriers, so you can act.
How do I check if my number is marked as spam?
Start a free trial and upload the numbers you want to check. Number Verifier reports each number's flag status across the major carriers and returns real mobile screenshots so you can see how your caller ID actually appears to customers. No credit card required to run your first check.
How do I check my phone number's reputation?
Number Verifier continuously checks your numbers' reputation across AT&T, Verizon, T-Mobile and popular call-blocking apps, and shows the results on a real-time dashboard. You'll see which numbers are healthy and which are flagged, and get alerts when a number's status changes.
How do I stop my number from showing up as spam?
The first step is visibility: know which numbers are flagged and where. From there you can rest or rotate flagged numbers, register your numbers with the major caller-ID reputation registries, and keep your calling patterns clean. Number Verifier monitors flag status in real time and alerts you the moment a number is labeled, so you can pull it from rotation before it hurts your answer rates.
How do I remove a "Spam Likely" or "Scam Likely" flag?
Removing a flag starts with monitoring and registration: identify the flagged numbers, register them with the carriers' caller-ID reputation registries, and correct the calling behavior that triggered the label. Number Verifier tracks each number's status across carriers so you can see whether a remediation effort is working. (Results depend on the carrier and the number's history — Number Verifier provides the monitoring and registration support, not a guaranteed removal.)
What is caller ID reputation, and how does monitoring work?
Caller ID reputation is how carriers and call-blocking apps rate the trustworthiness of a phone number. A poor reputation gets calls labeled spam or blocked outright. Number Verifier monitors the reputation of every number you enroll, in real time, across the major carriers — auditing flag status, alerting you to changes, and giving you screenshots of how your caller ID appears on real devices.
Which carriers and apps do you monitor?
Number Verifier monitors caller ID reputation and spam/scam-likely labeling across the nation's top carriers, AT&T, Verizon, and T-Mobile, as well as popular call-blocking apps, so you see the full picture of how your numbers are treated.
What is STIR/SHAKEN and how does it affect my calls?
STIR/SHAKEN is the industry framework carriers use to verify that a caller ID has not been spoofed. Calls are signed with an attestation level (A, B, or C) reflecting how confident the originating carrier is in the number. Maintaining a clean caller-ID reputation helps your legitimate calls earn full attestation and avoid being labeled spam. Number Verifier's monitoring tracks how your numbers are treated so you can protect that reputation.
What is CNAM registration / branded caller ID?
CNAM (Caller ID Name) is the business name that can display alongside your number on the recipient's phone. Registering and maintaining accurate CNAM / branded caller ID helps recipients recognize your call and answer it. Number Verifier helps you monitor how your caller ID displays across carriers and devices.
What are reassigned or disconnected numbers, and why do they matter?
Phone numbers are regularly disconnected and reassigned to new people. Dialing a reassigned number wastes spend and can create compliance risk. Number Verifier's Reassigned Numbers Database lets you identify disconnected or reassigned numbers so you reach the right customers.
Is monitoring real-time, and do you offer an API?
Yes. Number Verifier monitors your numbers in real time with a live dashboard and automated reporting, and offers API and webhook access so reputation data and alerts can flow directly into your own systems. Most teams are up and running quickly.
How much does it cos? is there a free trial?
You can start free, upload some of your numbers, review your flag status and call-tracking analytics, and see real caller-ID screenshots, with no credit card and no contract. See the Pricing page for plan details once you're ready to monitor at scale.

Put an End to Spam Flags

Don’t let spam flags ruin your hard-earned trust and reputation. Here’s how you can reclaim control of your caller ID and make sure your customers pick up your calls.

Start My Free Trial
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Trusted by 1500+ Companies
Group Star
"As an insurance provider, I never imagined our phone numbers would be labeled spam. I was utterly shocked to see almost all of our numbers were flagged as spam on at least one mobile phone carrier."
Mike Moranz
Reliasure Insurance Services
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