Calls Tagged as SPAM or Incorrect Caller ID

In an effort to protect end users against unwanted calls, carriers and consumer application providers have been increasingly blocking or labeling calls that they feel fit typical robocalling campaign characteristics, such as high call volumes and short or unanswered calls. When their own analytics indicate potentially unwanted traffic, carriers may respond by blocking calls or inserting “Spam Likely”, “Telemarketer”, “Fraud Likely”, or other similar labels to display on the handset.

This kind of call analysis is difficult because while fraudulent robocalls often do show some of these characteristics, so can many legitimate use cases, including school closing notifications, weather alerts, and patient reminders, that recipients want and have opted-in to receive. Still, when viewed en-masse at the network level, they can look like illegal robocalling.

Telephone carriers providers all have their own respective databases for CNAM.
These CNAM Databases update and refresh on their own algorithms and timers.
Some databases are set to update on daily, weekly, or even monthly.

In cases were a number had a previous Caller ID that has been recently updated, databases may still be showing the old Caller ID.

 
When updating a CNAM, the new name is broadcasted and can take 24-48hours for the originating carrier to implement the change.
But the originating carrier does not control when other carriers update theirs. 

Customer having issues should contact DC Tech's LNP Team