--- title: What to do if your calls are being marked as spam? description: Calls to external numbers not completing, marked as spam, ringing busy, or going straight to voicemail. --- [Skip to content](https://kb.greenlinknetworks.com/knowledge/why-are-my-calls-marked-as-spam#main-content) English Show submenu for translations ![2020 GL_Logo_Light.png\]](https://kb.greenlinknetworks.com/hs-fs/hubfs/2020%20GL%20Brand%20Related%20Assets/2020%20GL_Logo_Light.png?height=40&name=2020%20GL_Logo_Light.png) - [GreenLink Blog](https://blog.greenlinknetworks.com/allthingsgreenlinkvoip) - [GreenLink Page](https://greenlinknetworks.com/) Open main navigation Close main navigation - [GreenLink Blog](https://blog.greenlinknetworks.com/allthingsgreenlinkvoip) - [GreenLink Page](https://greenlinknetworks.com/) - English Show submenu for translations - [Go to www.greenlinknetworks.com/](https://www.greenlinknetworks.com/) [Go to www.greenlinknetworks.com/](https://www.greenlinknetworks.com/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://kb.greenlinknetworks.com/knowledge) 2. [How to?](https://kb.greenlinknetworks.com/knowledge/how-to) # What to do if your calls are being marked as spam? ## Calls to external numbers not completing, marked as spam, ringing busy, or going straight to voicemail. Phone service providers have been working to implement a new technology called, Stir/Shaken. It's intended to fight robocalls and other fraudulent calls. This new technology certifies a phone number as legitimate as a call passes from one carrier to another.  The tool is new, and if you're experiencing trouble completing calls to certain carriers, it is most likely that your number has been inadvertently flagged as problematic by the cell phone service carriers when they receive the call. It would be similar to an example of a legitimate email getting flagged as spam by an email filter. To help address these occurrences, mobile carriers have set up portals by which you can register your number so they can whitelist it to allow your calls to their services. #### Step 1. Centralized Registration (All Major Carriers) Free Caller Registry - Covers: AT&T (Hiya), T-Mobile/Sprint (First Orion), Verizon (TNS) Link:  [freecallerregistry.com](http://freecallerregistry.com) Action: Submit all business numbers in CSV/text format Processing Time: ~1–2 weeks #### **Step 2. Direct Submissions (Optional but Helpful)** If numbers are still flagged, submit directly: - Hiya (AT&T) - Link: Hiya Business Support - Purpose: Reputation correction & branded caller ID - First Orion (T-Mobile/Sprint/MetroPCS) - Link: [calltransparency.com](http://calltransparency.com) - Purpose: Register & reduce spam labeling - TNS (Verizon, U.S. Cellular) - Link: [reportarobocall.com/trf](http://reportarobocall.com/trf) - Purpose: Dispute spam tagging with Verizon analytics   If you need assistance whitelisting your number(s) with one of these carriers, please reach out to their support teams.   - [Getting started](https://kb.greenlinknetworks.com/knowledge/getting-started#main-content) - [Onboarding](https://kb.greenlinknetworks.com/knowledge/getting-started#onboarding) - [Mobility Suite (Apps)](https://kb.greenlinknetworks.com/knowledge/getting-started#mobility-suite-apps) - [Hardware Compatibility](https://kb.greenlinknetworks.com/knowledge/getting-started#hardware-compatibility) - [Network Optimization Requirements](https://kb.greenlinknetworks.com/knowledge/getting-started#network-optimization-requirements) - [Porting](https://kb.greenlinknetworks.com/knowledge/getting-started#porting) - [How to?](https://kb.greenlinknetworks.com/knowledge/how-to#main-content) - [Customer Portal](https://kb.greenlinknetworks.com/knowledge/how-to#customer-portal) - [Partner Portal](https://kb.greenlinknetworks.com/knowledge/how-to#partner-portal) - [End-user Settings](https://kb.greenlinknetworks.com/knowledge/how-to#end-user-settings) - [Fax Solutions](https://kb.greenlinknetworks.com/knowledge/how-to#fax-solutions) - [Phone Guide](https://kb.greenlinknetworks.com/knowledge/how-to#phone-guide) - [Phone System Admin](https://kb.greenlinknetworks.com/knowledge/how-to#phone-system-admin) - [Softphone](https://kb.greenlinknetworks.com/knowledge/how-to#softphone) - [Voicemail](https://kb.greenlinknetworks.com/knowledge/how-to#voicemail) - [Customer Support](https://kb.greenlinknetworks.com/knowledge/customer-support#main-content) - [Customer Support](https://kb.greenlinknetworks.com/knowledge/customer-support#customer-support) - [Billing Questions](https://kb.greenlinknetworks.com/knowledge/customer-support#billing-questions) - [Add-ons](https://kb.greenlinknetworks.com/knowledge/customer-support#add-ons) - [Troubleshooting](https://kb.greenlinknetworks.com/knowledge/troubleshooting) - [Features](https://kb.greenlinknetworks.com/knowledge/features) - [Release Notes](https://kb.greenlinknetworks.com/knowledge/release-notes#main-content) - [Archive](https://kb.greenlinknetworks.com/knowledge/release-notes#archive) - [Additional Releases Information](https://kb.greenlinknetworks.com/knowledge/release-notes#additional-releases-information) - [Partner Portal](https://kb.greenlinknetworks.com/knowledge/release-notes#partner-portal) - [Softphone](https://kb.greenlinknetworks.com/knowledge/release-notes#softphone) - [FAQ](https://kb.greenlinknetworks.com/knowledge/faq#main-content) - [Onboarding](https://kb.greenlinknetworks.com/knowledge/faq#onboarding) - [GreenLink Blog](https://blog.greenlinknetworks.com/allthingsgreenlinkvoip) - [GreenLink Page](https://greenlinknetworks.com/) [![Chill listening crop-3](https://kb.greenlinknetworks.com/hs-fs/hubfs/2020%20GL%20Brand%20Related%20Assets/2020%20GL_Logo_Normal.png?width=81&height=24&name=2020%20GL_Logo_Normal.png "Chill listening crop-3")](http://greenlinknetworks.com) Greenlink Networks | Cloud Based VoIP Solutions Copyright © 2026, GreenLink Networks