The Growing Threat to Business Numbers
Spam calls and caller ID spoofing are more than just annoyances — they can damage your business reputation. When scammers spoof your business number, victims see your caller ID and associate your brand with fraud. In 2025, Americans received an estimated 55 billion robocalls, and businesses were among the hardest hit.
Understanding Spoofing
Caller ID spoofing is when someone disguises their outgoing caller ID to display a different number — often yours. This is technically simple and widely abused by scammers. The result:
- Your customers receive scam calls that appear to come from your business
- Your number gets flagged as "Spam Likely" by carriers
- Legitimate calls from your business go unanswered
Step 1: Register with STIR/SHAKEN
STIR/SHAKEN is the FCC-mandated caller authentication framework. When your calls carry an "A" attestation, carriers know the call legitimately originated from your number. Contact your phone service provider to ensure:
- Your numbers are properly registered in the STIR/SHAKEN framework
- Outbound calls receive full ("A" level) attestation
- Your provider participates in the STIR/SHAKEN governance framework
Step 2: Register in the Free Caller Registry
The Free Caller Registry (operated by the Industry Traceback Group) allows legitimate businesses to register their numbers. This helps carriers distinguish your real calls from spoofed ones.
Step 3: Monitor Your Number's Reputation
Use call analytics services to monitor whether your number is being flagged:
- Check if major carriers label your number as "Spam Likely"
- Monitor call answer rates — a sudden drop may indicate flagging
- Test your number by calling from different carriers periodically
Warning Signs Your Number Is Being Spoofed
- You receive angry callbacks from people you never called
- Your voicemail fills with messages from confused strangers
- Call answer rates drop significantly
- Your number appears on spam complaint lists
Step 4: Implement Call Authentication
Beyond STIR/SHAKEN, additional authentication measures include:
- Branded calling: Display your business name and logo on caller ID
- Verified calls: Some carriers offer verified business call programs
- CNAM registration: Ensure your Caller Name (CNAM) is properly set
Step 5: Protect Inbound Calls
Protect your business from receiving spam:
- Enable your carrier's spam filtering features
- Use a call screening service or IVR to filter robocalls
- Block known spam number ranges
- Require callers to press a key before connecting (CAPTCHA for phone calls)
Step 6: Have a Response Plan
If your number is spoofed at scale:
- File a complaint with the FCC
- Contact the Industry Traceback Group
- Notify your customers via email or website
- Work with your carrier to restore your number's reputation
- Consider temporarily using a secondary number while the issue is resolved
Protect Your Investment
A premium business number is a valuable asset worth protecting. Browse 80M+ numbers to find or upgrade your business number, and take the steps above to keep it safe.
