When you see the phrase "*67 does what" in a call log or message thread, it usually refers to a caller ID modification feature tied to U.S. number portability and privacy services.
Understanding what "*67" does helps you control how your number appears to recipients and whether your identity is preserved during outbound calls.
| Feature | Effect | When to Use | Limitations |
|---|---|---|---|
| Calling Line Identification Restriction (CLIR) | Blocks caller ID for a single outbound call | Protecting privacy, contacting sensitive numbers | Recipient can still reject or override the block |
| Per-Call Activation | Applied only when dialed before the destination number | Sporadic use without carrier subscription | Not stored on the device by default |
| Number Portability Context | Works across U.S. ports; behavior may vary internationally | Keeping number privacy during a move | Implementation depends on the carrier |
| Business and Carrier Policies | Some providers block or log *67 for compliance | Enterprise and regulated industries | May require account settings or support to adjust |
Privacy Activated With Star Six Seven
Using *67 before dialing hides your number from the recipient, which is useful when you want to avoid sharing your caller ID.
This method is common for personal privacy rather than permanent anonymity, since it does not change your phone number or account.
How It Works on Mobile and Landline
On most phones, you dial *67 followed by the full number, and the device sends a CLI restriction signal through the PSTN.
Landline and VoIP systems handle the signal similarly, though success depends on carrier support and local regulations.
Legal and Policy Considerations
Regulators allow per-call *67 restrictions, but businesses often face stricter rules about obscured calling lines for transparency and fraud prevention.
Carriers may override or log these calls, especially in sectors requiring verified identification or emergency response tracking.
Behavior Across Carriers
Major national carriers generally support *67, but independent providers or MVNOs might ignore the code or require an add-on feature.
International calls typically do not honor the code, and the recipient may still see restricted or unknown depending on their local settings.
Operational Guidance Around Star Six Seven
- Dial *67 only before the destination number for one-time privacy on that call.
- Check your carrier settings if calls do not display as restricted.
- Remember that businesses and emergency services can often bypass the restriction.
- Use account-level settings if you want permanent or carrier-managed caller ID control.
FAQ
Reader questions
Will *67 still block my number if the recipient has caller ID spoofing tools?
Yes, *67 can block standard caller ID, but advanced spoofing or enterprise call management systems may still flag or override the restriction.
Can emergency services or 911 see my number when I use *67?
Most emergency systems override per-call blocking and can still retrieve your subscribed number for response and verification.
Does *67 stop my number from appearing on call records?
Recipient carriers may still log the call as restricted or private, so your number can appear on their detailed records despite the block.
Is *67 reliable for international calls?
No, international networks often ignore *67, and local numbering plans may display the call as private, restricted, or unknown instead.