Send SMS (A2P 10DLC)

📲 A2P 10DLC (Application‑to‑Person 10‑Digit Long Code)

A2P 10DLC is a U.S. carrier framework that lets businesses send high‑volume, application‑driven SMS and MMS using standard 10‑digit phone numbers (10DLC). Compared to plain long‑code traffic, registering under A2P 10DLC yields:

• Improved deliverability — fewer messages caught by carrier filters

• Higher throughput — faster sending rates per number

• Brand & campaign vetting — carriers know you’re a legitimate sender

Do I Need to Register?

• Yes, if you send SMS or MMS to U.S. mobile numbers from a 10‑digit long code.

• No, if you only send outside the U.S.—you can keep messaging as usual.

📝 Registration Overview

The process has two parts:

Step	Description
1. Brand	Identify your business (Brand Type) and submit your company info and Tax ID (EIN) if applicable.
2. Campaign	Define each messaging use case (e.g. marketing, alerts, notifications) and register it under A2P 10DLC.

1. Brand Registration

Your Brand Type depends on your legal status, message volume, and use case:

Brand Type	Tax ID Required?	Daily Volume	Notes
Hobbyist (Sole Proprietor)	No	≤ 3,000 msgs (max 1,000/day to T‑Mobile)	Non‑commercial or test senders
Low‑Volume Standard Brand	Yes	< 6,000 segments/day	Small businesses
Standard Brand	Yes	≥ 6,000 segments/day	Larger enterprises or high volume

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2. Campaign Registration

Each use‑case (campaign) must be registered so carriers know exactly what kinds of messages you’ll send:

Use Case	Details
Standard	Common scenarios (e.g. two‑factor auth, alerts)
Special	Regulated or sensitive (e.g. political, financial) – extra carrier review required

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🔗 How to Register

Registration happens in the Twilio Console:

1. Log in to Twilio Console → Messaging → A2P 10DLC

2. Complete the Brand form (company info, EIN, logo, website)

3. Add one or more Campaigns, selecting your use‑case type

4. Submit for carrier vetting

For a step‑by‑step guide, see Twilio’s “How to Register for A2P 10DLC Messaging.”

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⏱️ Registration Timeline

Item	Typical Duration
Brand Approval	Minutes up to 24 hours
Secondary Vetting	Up to 7 days (if info requires manual review)
Campaign Approval	1–7 business days