The 10DLC registration deadline that matters for new Application-to-Person (A2P) traffic is now. United States carriers already expect an approved brand and campaign in The Campaign Registry (TCR) before they treat 10-Digit Long Code (10DLC) business SMS as registered A2P.
Searchers still ask “when did 10DLC registration start” because early rollout dates were staggered by carrier. Those historical start dates do not create a remaining grace period for a new program.
What “Deadline” Means in 2026 Operations
There is no open industry window that lets a new US 10DLC program skip TCR. Campaign Service Provider (CSP) consoles show “A2P 10DLC registration required” when records are missing.
Treat the deadline as the date you need production throughput, minus three to four weeks of filing time.
Historical Start Versus Current Enforcement
Carriers phased 10DLC requirements over multiple years. T-Mobile, AT&T, and Verizon tightened filtering as unregistered A2P persisted.
Operations teams should not rebuild a project plan around those original start headlines. Enforcement is active. Unregistered A2P can be blocked or throttled on the first send.
Deadlines Inside an Approved Program
After approval, other clocks still exist:
- Campaign monthly TCR fees continue while the campaign stays active
- Consent records should be retained four or more years under Telephone Consumer Protection Act (TCPA) practice
- Use-case changes require a new campaign before the new copy ships
- Brand legal changes after a merger require an identity update
Missing those internal clocks recreates an unregistered state even after the first approval.
Launch Planning
If a campaign must start on a fixed marketing date, file the brand first and freeze copy early. Special use cases and trust scores under 50 consume the longest review bands.
Do not interpret a CSP trial token or sandbox send as a deadline extension.
FAQ
When did 10DLC registration start?
Carriers phased the rule over several years. New programs should treat registration as currently required.
Is there a 10DLC registration deadline for existing traffic?
Existing unregistered A2P is already subject to filtering. Do not wait for a new industry memo.
Does the FCC set the 10DLC deadline?
The FCC enforces TCPA. 10DLC deadlines are carrier and TCR operational rules.
Disclaimer
Mytcrplus.com provides tools and templates to support compliance efforts but does not provide legal advice. Compliance requirements vary by industry, jurisdiction, and use case. You are responsible for ensuring your messaging practices comply with applicable laws, obtaining appropriate consent from recipients, and monitoring ongoing compliance as regulations evolve. Consult legal counsel if you are unclear about your specific compliance situation.
MYTCRPLUS.com is not affiliated with The Campaign Registry. TCR and The Campaign Registry are trademarks owned by The Campaign Registry. The use of TCR is nominative use only.