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Why do my calls say 'Spam Likely'?

Legitimate calls being marked as Spam is one of the most challenging problems the telecom industry faces now. Mobile phone providers can be very aggressive when marking calls as Spam Likely, and the tag can be applied after making only a few outbound phone calls. This can cause issues for legitimate businesses simply trying to make outbound calls to their clients.

What is the best way to mitigate Spam Likely Tags?

The best way to mitigate Spam Likely tags is to register your new Unitel phone number with

This free portal streamlines the caller registration process with First Orion, Hiya, and TNS and registers the calling business with the Analytics Engines that support major wireless and wireline carriers in the US.

While this step reduces the likelihood of Spam Likely Tags, it doesn’t completely prevent it from happening. Outbound callers that produce high volumes of short-duration attempts will likely still see the Spam tag applied to their numbers.

Note – This process is not a replacement for outbound Caller ID registration. More details regarding outbound Caller ID can be found here

What variables are considered when a number is marked as Spam Likely?

While the metrics that are monitored can vary from carrier to carrier, these appear to be the common variables weighed against DIDs that are marked as Spam:

  • Quantity of outbound phone calls

  • Quantity of calls sent to VM

  • CPS (Calls Per Second)

  • Level of Attestation

  • Average Length of Call

  • Quantity of calls 6 seconds or less

When should I register with the Free Caller Registry?

Unitel recommends that customers register their numbers as soon as they are purchased. If you are porting numbers to your network, we recommend adding registration with this database as soon as possible.

My Number has already been tagged as Spam Likely. What should I do?

If your numbers have already been tagged as Spam, we recommend contacting the mobile carrier applying this tag. Help Desk links for T-Mobile, Verizon, AT&T, and several other websites are included below.





Email [email protected], or contact Nomorobo at and choose “Report a Number.”


Contact through the website at and choose “Report a Number.” Nomorobo has a white list feature to which subscribers can add numbers to prevent erroneous blocking.


Call 888-211-4727 or contact TNS at

US Cellular

Call 888-944-9400 or contact through the website at


Call 800-347-1991 or contact by email at the website:

Are there any other ways to mitigate Spam Likely Tags?

There are a few other steps that you can take to mitigate Spam tags:

  • Ask customers to save your business number

Some third-party scam-blocking apps allow users to block calls from unknown numbers that aren’t listed in their contacts, so your call may not reach them if one of those services is in use. 

If customers are saving your number in their contacts, this will reduce the chance of that happening while also making them more likely to ignore any spam likely tags since they will recognize your number.

  • Ask clients to adjust or remove third-party spam blockers

While this solution may seem impractical, it could alert your customers to potential problems they have with other blocked calls. Some users often have spam blockers installed unknowingly.

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