What is A2P 10DLC and why it matters

A2P 10DLC (Application-to-Person 10-digit long code) is the US carrier registration that a business must complete to send text messages to customers from a standard 10-digit local phone number. Registration ties your messaging to a verified Brand (your business identity) and one or more Campaigns (how you plan to message), which helps carriers evaluate trust and reduce spam.

You submit the details through ResQEngage (LeadConnector phone), but the review and approval is handled by the US phone carriers and their registration partners. Carriers — not ResQEngage — decide whether a Brand or Campaign is accepted or rejected.

Key benefits of registering

• Improved deliverability: carriers can identify legitimate business messaging and reduce blocking.
• Higher trust with carriers: verified Brand details and Campaign intent improve carrier confidence.
• More consistent sending: approved registrations can unlock more stable throughput based on trust scoring.
• Reduced compliance risk: following opt-in and content rules lowers the chance of filtering and enforcement.
• Better customer experience: proper consent flows (clear HELP/STOP handling and disclosures) mean fewer complaints.

The two required pieces: Brands and Campaigns

Registration is built around two parts. Your Brand verifies who the business is; your Campaign explains what type of messages it will send. Carriers generally require both an approved Brand and an approved Campaign before messaging from a US local number is fully supported.

Brands — Standard vs. Sole Proprietor

• Standard Brand: for registered businesses with an EIN (LLC, corporation, or other formally registered entity).
• Sole Proprietor Brand: for businesses not formally registered as a separate legal entity.

Choosing the correct path upfront helps avoid delays and rejections.

Campaigns and use cases

Campaign registration connects your approved Brand to a specific messaging purpose (for example, appointment reminders, account notifications, or marketing). Carriers review your opt-in language and sample messages to confirm they match the use case. Select the use case that genuinely matches your messaging — mismatches are a common rejection reason.

Fees

• Registration fees: Brand and Campaign submissions include fees during the application process.
• No resubmission fee: if a Brand or Campaign is rejected and you correct and resubmit, there is no additional resubmission fee.

Frequently asked questions

Do toll-free numbers require A2P 10DLC registration?
No. A2P 10DLC applies to standard 10-digit local numbers. Toll-free numbers (like 1-800) do not require it.

Does ResQEngage approve or reject my Brand/Campaign?
No. You submit through ResQEngage, but US carriers and their registration partners make the approval decision.

What's the difference between a Brand and a Campaign?
A Brand identifies the business sending messages. A Campaign describes the purpose and content type of the messages the Brand will send.