The direct answer: plan for 3–6 weeks total. Brand registration: minutes when clean, 24–72 hours in manual review, 5–10 business days if flagged for secondary vetting. Campaign review: 1–2 business days at The Campaign Registry, then 3–5 business days at T-Mobile and Verizon. AT&T's independent manual review consistently takes 2–4 weeks and cannot be expedited. Start registration 6–8 weeks before your first intended send.
New here? A2P 10DLC is the registration US carriers require from any business texting over a standard 10-digit local number — our full registration guide covers the what and why. This article answers the question that decides launch dates: how long does each stage really take, and what makes it longer?
The timelines below reflect 2026 industry reporting — consistent across carrier-facing consultancies like Telphi Consulting and messaging providers like Telgorithm — plus what we see running registrations for clients.
The stage-by-stage timeline
| Stage | Who reviews | Typical time (2026) |
|---|---|---|
| Brand registration (clean) | The Campaign Registry (automated) | Minutes |
| Brand — manual review | TCR | 24–72 hours |
| Brand — secondary vetting | TCR + documentation | 5–10 business days |
| Campaign review | TCR | 1–2 business days |
| Carrier review | T-Mobile, Verizon | 3–5 business days |
| Carrier review — the bottleneck | AT&T (human reviewer) | 2–4 weeks |
Read that last row twice, because it reshapes everything: even a perfect submission sits in AT&T's human review queue for weeks, and no provider, aggregator, or consultant can expedite it. Anyone promising full approval "in 48 hours" is describing the earlier stages at best — the messages you send to AT&T numbers won't have full standing until their review clears.
What actually makes it faster (and slower)
You can't skip the queue. What you control is whether you have to rejoin it. A rejection at any stage restarts that stage's clock — and rejections are overwhelmingly self-inflicted:
- Brand details that don't match verification records. Your submitted name, EIN and address must match IRS and state registry data exactly. Mismatches push you from "minutes" into manual review or vetting.
- Description/use-case mismatch. Registering "Customer Care" then describing promotions. Our use-case guide maps real message types to the right registration.
- Website problems. Broken, under construction, or not obviously the same brand.
- Privacy policy gaps. Must exist, be reachable, mention SMS, and state that opt-in data isn't sold or shared.
- Opt-in that reviewers can't see. A screenshot-ready form with explicit consent language.
Each resubmission costs you the stage's full review time again. Getting it right the first time isn't perfectionism — it's the only lever that meaningfully shortens the calendar.
What the aggregator marketing means
Several messaging platforms advertise dramatically faster approvals through direct carrier relationships — we looked at one closely in our SignalHouse review. Two honest framings to hold at once: better tooling and hands-on registration support genuinely reduce self-inflicted delays and resubmission loops, which is real value. But vendor speed claims describe their portion of the pipeline — the AT&T manual review applies to everyone, and it's the long pole.
The 6–8 week launch plan
Working backwards from a first-send date:
- Weeks 8–7 before launch: fix the fundamentals — website live and matching the brand, privacy policy with SMS language, opt-in form captured. Submit brand registration.
- Weeks 7–6: submit the campaign with an honest description and real sample messages including opt-out lines.
- Weeks 6–2 (the waiting room): build everything downstream — follow-up workflows, message templates, list cleaning and segmentation, STOP handling. If your system involves AI agents sending texts, wire and test them now (the booking-system components can all be built and dry-run before approval).
- Weeks 2–0: approval lands; send a low-volume warm-up before full campaigns.
The mistake this plan prevents: discovering a registration problem one week before a committed campaign date. At that point there's no fix that arrives in time — the AT&T queue doesn't care about your launch.
The bottom line
Three to six weeks, plan for six to eight. The stages you control reward clean first-time submissions; the stage you don't control (AT&T) rewards starting early. Build your launch date around the timeline instead of hoping the timeline bends around your launch date.
Registration pending forever, or already rejected? Send us what you submitted and we'll tell you which stage you're stuck in and what's actually wrong — request a free automation audit and get a written answer within 24 hours. We handle 10DLC registration end-to-end, including the resubmissions other people gave up on.
