The "potential spam" warning comes from the carriers' database/algorithm. Most carriers have a request form you can fill out if you're a legitimate operation showing up as spam risk. You'll have a greater chance at success if you first have your outgoing caller id set to a single number. Your CSM can help you with that.
Then, submit requests to the following sites:
-AT&T: Call 800-337-5373, email dl-GFMOBusinessFra@ATT.com, or contact Hiya through its website, hiyahelp.zendesk.com/hc/en-us/requests/new. Calling parties can also provide feedback at att.com/reviewmycalllabel, which links to Hiya’s portal.
-CenturyLink: Email robocall.reporting@centurylink.com, or contact Nomorobo at nomorobo.com/contact and choose “Report a Number.”
-First Orion: Contact via website at calltransparency.com.
-Frontier: Email nospam@ftr.com, or contact Nomorobo.
-Hiya: Contact through website at hiyahelp.zendesk.com/hc/en-us/requests/new. Hiya provides a service for legitimate businesses to register, through connect.hiya.com.
-Nomorobo: Contact through website at nomorobo.com/contact and choose “Report a Number.” Nomorobo has a white list feature to which subscribers can add numbers in order to prevent erroneous blocking. -Sprint: Call 888-211-4727 or contact TNS at reportarobocall.com/trf.
-T-Mobile: Contact through feedback.fosrvt.com or through First Orion at calltransparency.com. -TNS: TNS provides a portal on its website for identifying inaccuracies, through its robocall feedback website, reportarobocall.com/trf, and it allows companies to subscribe to alerts to inform them when the number is classified as a spammer, spoofer, scammer, or robocaller.
-US Cellular: Call 888-944-9400 or contact through website at uscellular.com/support/robocall/index.html. -Verizon: Contact through website at voicespamfeedback.com.
-Windstream: Call 800-347-1991 or contact by email at website: windstream.com/Support/Phone/Troubleshooting-repair. More info at https://www.fcc.gov/call-blocking
You can also request to your CSM to have your CNAM updated. Your CNAM is what determines your caller ID for landlines.
