A2P 10DLC is the US carriers' framework for application-to-person text messaging over 10-digit long codes. Businesses must register their brand and use cases with the carriers (via The Campaign Registry) before sending SMS at scale, or messages get blocked or filtered.

What will I need to submit?

Your legal business name, EIN, registered business address, business website, the contact person's name and email, a description of your SMS use cases, and sample messages. Sole proprietors can register too — slightly different process.

How long does approval take?

Brand registration is usually approved in 1-3 business days. Campaign approval (the specific use cases) typically takes 1-2 weeks once your brand is verified. We handle the back-and-forth with the carriers throughout.

A2P 10DLC · Required for US SMS delivery

Get your business verified so your texts actually deliver.

US carriers (AT&T, T-Mobile, Verizon) require A2P 10DLC registration for any business sending SMS at scale. Submit your details below — we handle the carrier paperwork end-to-end.

Brand approval in 1–3 days We file with the carriers for you No more blocked messages

01 — What it is

A2P 10DLC, in plain English

A2P = application-to-person. 10DLC = the 10-digit US phone numbers your business uses. Together it's the framework you have to register under to send compliant SMS through US carriers.

02 — Why carriers want it

Less spam, traceable senders

Carriers built A2P 10DLC to crack down on the flood of unsolicited SMS. Registered brands and use cases get higher throughput; unverified senders get filtered, throttled, or blocked entirely.

03 — If you skip it

Messages quietly disappear

Unregistered traffic from US 10-digit numbers gets heavily filtered by AT&T, T-Mobile, and Verizon. You won't see error codes for blocked sends — and there's no escalation path with the carriers.

04 — We handle it

Submit once, we register

Fill the form below with your business details and we file with The Campaign Registry on your behalf. Brand approval is typically 1–3 days; campaign approval follows within 1–2 weeks.

A2P Phone Verification

Your business · use cases · sample messages

Live

Have this ready

What you'll need to submit

Saves a back-and-forth. None of this is shared with anyone besides the carrier registry.

Legal business name EIN or sole-prop OK
Registered business address
Business website URL
Authorized contact (name + email)
SMS use case description
2–3 sample messages you'll send
Opt-in / consent flow you use

Timeline

What happens after you submit

Day 0

We review & file

Form lands with us. We package it for The Campaign Registry within 24 hours.

Day 1–3

Brand approved

Carriers verify your business identity. Most brands clear in 24–72 hours.

Week 1–2

Campaign approved

Each use case (marketing, transactional, support) gets its own approval cycle.

After

You're live

Messages route over registered 10DLC. Higher throughput, lower filtering, traceable delivery.

Questions first?

Book a 15-min call with Jimmy

⚠ Common gotcha

Sample messages must include opt-out instructions (usually "Reply STOP to opt out"). Carriers reject campaigns without them. Add it to one of your samples and you'll save a round-trip.

Frequently asked

Do I really have to register?+

If you send SMS from a US 10-digit number to US recipients, yes. Unregistered traffic gets heavily filtered, throttled, or rejected outright by AT&T, T-Mobile, and Verizon. There's no carrier-level escalation path for unregistered numbers, so you won't even see the failures clearly.

How long does the whole process take?+

Brand registration is usually approved in 1–3 business days. Campaign approval (the specific use cases you're registering) typically takes 1–2 weeks once your brand is verified. We handle the back-and-forth with the carriers throughout — you just submit once.

I'm a sole proprietor — can I still register?+

Yes. There's a separate sole-prop path that uses different identity verification (no EIN required). Throughput limits are slightly tighter than a registered business, but messages still deliver compliantly.

What if my use case includes marketing & transactional SMS?+

You'll register separate campaigns for each use case. Marketing, transactional, customer care, and notifications each get their own approval — that way carriers know exactly what kind of traffic to expect from your number.

Is there a fee?+

The Campaign Registry charges a small monthly fee per registered brand and per campaign — we'll cover the exact amount in your quote. There's no carrier signup fee on top of that.