What A2P 10DLC actually is
A2P stands for “Application to Person” — meaning automated messages from a business application (like GoHighLevel) to a person’s phone. 10DLC stands for “10-Digit Long Code” — referring to the standard US phone numbers (e.g., 555-123-4567) that businesses use for SMS, as opposed to short codes (5-digit numbers).
In 2021, US carriers established the A2P 10DLC framework as a way to combat spam and ensure legitimate businesses can reliably reach customers. Every business sending SMS through a 10DLC number now has to register their brand and their messaging campaigns with The Campaign Registry (TCR), the central authority that issues approval to carriers.
If you skip this registration: carriers heavily throttle or outright block your traffic. Your appointment reminder might reach 30% of recipients. Your nurture campaign might never deliver. You won’t get a “your message failed” notice — it just silently doesn’t get through.
Why this matters for law firms
Carriers (Verizon, AT&T, T-Mobile) automatically filter non-compliant 10DLC traffic. Your reminder SMS, your appointment confirmations, your nurture sequences — all blocked. Customers don’t know you texted them. Bookings drop.
For practical purposes, A2P registration is not optional. Unregistered SMS gets heavily filtered by carriers and may not deliver at all. For a firm relying on SMS reminders and nurture, lack of A2P registration kills the entire workflow.
Why most firms struggle with A2P registration
The registration process has multiple steps, each with specific documentation requirements:
- Brand registration. Your law firm registers its brand identity with TCR — entity name, EIN, website, industry classification, address. Filling these incorrectly causes rejection.
- Brand verification. TCR runs vetting against your business records. Mismatches between your provided info and your IRS / state filings cause rejection. Common pitfalls: DBA names not registered properly, address inconsistencies between IRS and state.
- Use-case classification. You select the categories of messages your firm will send (account notifications, marketing, mixed). Choose wrong and you get throttled.
- Campaign registration. Each “campaign” (e.g., appointment reminders, nurture sequence, lead followups) gets registered separately with sample messages. Sample messages with words like “free consultation” or “limited time” can trigger rejection or throttling.
- Sample message approval. TCR’s automated review checks for compliance with content policies. Law firms have specific challenges around words like “free consultation” (often flagged as marketing despite being attorney advertising compliant).
A self-attempt at A2P registration typically takes 4–8 weeks of back-and-forth, with multiple rejections requiring resubmission. During that time, your SMS traffic is throttled or blocked.
What we do
We handle the full A2P 10DLC registration process:
- Gather your firm’s documentation (business records, IRS records, address verification)
- Submit brand registration with verified, consistent information
- Configure brand verification responses
- Register law-firm-specific campaigns (intake, reminders, nurture, payment collection) with pre-approved sample messages
- Handle TCR review correspondence
- Resolve rejections (most firms see 1–2 minor rejections we fix immediately)
- Confirm campaign approval and live SMS delivery
Typical timeline: 2-3 weeks from submission to approval, faster than the 4-8 weeks of DIY attempts because we know which fields cause rejections and how to write sample messages that pass review for legal services.
A2P 10DLC FAQ
Is A2P registration optional?
For practical purposes, no. Unregistered SMS gets heavily filtered by carriers and may not deliver at all. For a firm relying on SMS reminders and nurture, lack of A2P registration kills the entire workflow.
How much does A2P registration cost (separate from our service)?
The Campaign Registry charges $4 per brand registration (one-time) and $10 per campaign per month (ongoing). Carrier vetting fees vary. Total typical cost: $4 setup + $10–$30/month ongoing depending on campaign count. We pass these costs through at cost — no markup.
What if my firm has multiple DBAs or trade names?
Each DBA needs its own brand registration. We handle multiple-DBA firms regularly — e.g., main firm name plus a “Spanish-language division” trade name. Each registration is straightforward once you understand the rules.
Can I send SMS without A2P during the registration period?
Limited volume yes (carriers allow some non-registered traffic at very low throughput), but practically no — your appointment reminder cadence will exceed the throttle limit and trigger blocking. We recommend completing registration before relying on SMS-dependent workflows.
Skip the A2P registration nightmare
Done-for-you A2P 10DLC. Compliance guaranteed. Book a demo to walk through your firm’s setup, or grab the snapshot and we’ll handle the entire registration as part of onboarding.