Which Numbers Need Registration?
US Local Numbers
Any US +1 number that is not toll-free. Requires before outbound messages can be delivered.
US Toll-Free Numbers
Prefixes +1800, +1833, +1844, +1855, +1866, +1877, +1888. Exempt from 10DLC but requires separate .
Required Data
Gather the following before starting registration.Brand registration (business identity) — 10DLC
Brand registration (business identity) — 10DLC
Sole proprietors without an EIN register as a Sole Proprietor Brand using first/last name instead. Sole proprietors with an EIN must register as a Standard or Low-Volume Brand.
Campaign registration (messaging use case) — 10DLC
Campaign registration (messaging use case) — 10DLC
Toll-free verification
Toll-free verification
Registration Steps
Registration is handled by the OpenCX team on your behalf. Gather the required data above, then follow the steps below.- 10DLC
- Toll-free verification
1
Buy Or Verify Your Number
Go to Settings → Phone Numbers. Buy a US local number from inventory or verify a number you already own.
2
Prepare Your Brand And Campaign Data
Collect the fields listed in the Brand registration and Campaign registration sections above. You will need your EIN, legal business name, use case, sample messages, and policy URLs.
3
Contact The OpenCX Team
Reach out to your account team or contact support from your OpenCX dashboard. Provide the brand and campaign data. The team submits your registration to US carriers.
4
Wait For Approval
Brand review typically takes a few business days. Campaign review takes 10–15 business days. You will be notified when approved.
5
Enable SMS
Once approved, go to Channels → SMS, select your registered number, and enable the channel.
What Happens Without Registration?
Related Documentation
Connect SMS
Go live after registration is approved.
SMS Flow
Session matching, delivery path, and outbound format.
Troubleshooting
Carrier still blocking? Diagnose delivery failures.
Human Handoff
AI to human escalation — applies to SMS sessions.