10DLC Registration Guide: What It Is & How to Register in 2026

If your business sends SMS from a standard 10-digit US phone number, you need to register that number for 10DLC — or carriers will throttle or block your messages. This guide explains what 10DLC is, why it exists, the exact registration steps, and how to avoid the common mistakes that delay approval.

What is 10DLC?

10DLC stands for 10-Digit Long Code. It’s the industry-wide framework US mobile carriers (AT&T, T-Mobile, Verizon) use to approve application-to-person (A2P) business messaging from standard 10-digit phone numbers.

Before 10DLC launched in 2021, businesses sent SMS through an unregulated “grey route” — cheap but prone to filtering and carrier blocks. 10DLC created an approved pathway: register your brand, register your campaign, pay modest fees, and get reliable delivery with higher throughput limits.

If you send business SMS from a 10-digit number in the US — appointment reminders, order confirmations, two-factor codes, marketing — you need 10DLC.

Why 10DLC exists

Carriers built 10DLC to solve two problems:

1. Spam — unregulated A2P traffic from 10-digit numbers was flooding consumers. Carriers lost goodwill.
2. Attribution — when a spam complaint landed, carriers had no way to trace it to a specific business.

The Campaign Registry (TCR), the industry body running 10DLC, requires every business to register a Brand (your company) and one or more Campaigns (use cases: appointment reminders, marketing, customer support). Registered traffic gets reliable delivery; unregistered traffic gets throttled or blocked.

Who needs to register

You need to register 10DLC if:

• You send business SMS from any 10-digit US number
• Volume is ≥ 1 message per day from a number
• Messages are sent to mobile numbers on AT&T, T-Mobile, Verizon, or other US carriers

You don’t need 10DLC if:

• You’re using a toll-free number (1-800, 888, 877) — those use toll-free verification instead
• You’re sending short-code messages (5-digit codes) — those have a separate approval process
• You’re person-to-person (P2P) messaging from a personal phone

10DLC fees in 2026

Costs are charged by the Campaign Registry and passed through by SMS platforms. Approximate as of April 2026:

• Brand registration — one-time $4
• Standard brand vetting (optional, improves throughput) — $40
• Campaign registration — $10 per campaign + monthly campaign fees ($1.50-$10/month depending on use case)
• Per-message carrier surcharges — $0.002-$0.005 per message depending on carrier

Total cost for a typical SMB with 1 brand and 2 campaigns: ~$50 upfront + $5-$20/month in fees. SMS platforms (DialPhone, Twilio, others) often absorb the brand fee or bundle it.

Step-by-step 10DLC registration

Step 1: Register your Brand

Your “brand” is your business entity. You’ll need:

• Legal business name (matches EIN records)
• EIN (federal tax ID)
• Industry vertical (retail, healthcare, financial services, etc.)
• Website URL
• Business address and contact
• A stock ticker (public companies) or description (private)

Brand registration takes 1-3 business days. Public companies are verified faster.

Tip: if your legal name differs from your DBA (“Acme Dental LLC” vs “Acme Dental Care”), use the legal name on the EIN or registration will fail.

Step 2: Register each Campaign (use case)

Each use case gets its own campaign. Common campaigns:

• Low-volume mixed messaging (under 2,000/day)
• Marketing
• Account notifications
• Customer care
• 2FA / account security
• Polling / voting
• Public service announcement
• Charity
• Higher Education
• Political
• Emergency

For each campaign you’ll need:

• Campaign description (what do you send, to whom, when?)
• Sample messages (2-3 real examples)
• Opt-in process (how do consumers consent to receive messages?)
• Opt-out keywords (STOP at minimum)
• Volume estimate (messages per day)
• Is this marketing? Is this recurring?

This is where most registrations get rejected. Be honest and specific. Vague descriptions and generic sample messages are the #1 rejection reason.

Step 3: Provision phone numbers under the campaign

Once the campaign is approved, associate your 10-digit phone numbers with it. Each number gets tied to one campaign. Most platforms allow multiple numbers per campaign.

Throughput depends on Brand vetting score and campaign type:

• Unvetted brand, mixed campaign: ~1 message/second
• Vetted brand, mixed campaign: ~30 messages/second
• Vetted brand, 2FA campaign: ~100 messages/second

Step 4: Test deliverability

Send test messages to each of the three big carriers (AT&T, T-Mobile, Verizon) before launching a campaign. Messages that land on all three in under 10 seconds confirm delivery. Delays of 30+ seconds or non-delivery indicate carrier filtering — check the campaign description matches what you’re actually sending.

Common 10DLC mistakes

• Sending marketing on a non-marketing campaign — carriers flag the mismatch and throttle.
• Missing opt-in records — carriers can request proof of consent. Keep a database.
• Not honoring STOP immediately — legal requirement (TCPA) and a carrier violation.
• Sending to numbers that opted out of ALL messaging on their carrier — check the carrier opt-out database before sending.
• Unclear sample messages — “Promotion!” as a sample message will get rejected. Write realistic examples.
• Vague opt-in description — “users opt in” fails. Specify: “users submit their number via a checkbox on our website signup form, acknowledging they’ll receive appointment reminders.”

TCPA overlap

10DLC is a carrier-level requirement. TCPA is a federal law (Telephone Consumer Protection Act) with consumer-level requirements. Both apply.

TCPA requires:

• Prior express written consent for marketing messages
• Clear opt-out method (STOP)
• Honor opt-outs within 10 business days
• No auto-dialed calls or messages to cell phones without consent

Violations carry $500-$1,500 per message in private action damages, plus class-action exposure.

Using a compliant SMS platform (DialPhone, Twilio with proper setup, others) handles the technical enforcement. The business is still responsible for having genuine opt-in records.

10DLC vs toll-free SMS vs short code

Channel	Setup time	Cost	Throughput	Best for
10DLC	2-5 business days	$50 + $5-$20/mo	1-100 msg/sec	Small and mid-size businesses
Toll-free SMS	1-2 weeks (toll-free verification)	$5-$20/mo	~3 msg/sec	Mid-market wanting toll-free presence
Short code (5-digit)	8-12 weeks	$500-$1,500/mo	100+ msg/sec	Enterprise marketing, 2FA at scale

For most SMBs and mid-market: 10DLC. For enterprise high-volume: short codes. Toll-free is rare unless the brand already has a toll-free voice presence.

How DialPhone handles 10DLC

DialPhone’s business SMS includes 10DLC registration assistance at no extra charge on Advanced and higher plans:

• Brand registration walk-through on onboarding call
• Campaign template library for common use cases (appointment reminders, 2FA, customer support)
• Automatic STOP/START/HELP keyword handling (TCPA compliance)
• Opt-in tracking with timestamped consent records
• Per-carrier delivery reporting
• Integration with Salesforce and HubSpot for CRM-triggered messaging

See the DialPhone business SMS product page for details.

Related resources

• TCPA glossary
• 10DLC glossary
• DialPhone business SMS
• Start a 14-day trial — registration assistance included

Registering for 10DLC is straightforward once you know the vocabulary. The main risk is the first rejection — plan for 1-2 revisions if your campaign descriptions aren’t specific enough the first time.