# What Is A2P 10DLC? Business Texting Rules

Source: https://insertchat.com/glossary/a2p-10dlc

> A2P 10DLC is the US system for registering businesses that text from regular 10-digit numbers. Learn who must register, how it works, and what it means.

A2P 10DLC is the US framework for business text messaging sent from standard 10-digit phone numbers. A2P means application-to-person: texts sent by software rather than typed person to person. 10DLC means 10-digit long code. Carriers require the business, called the brand, and its texting use case, called the campaign, to be registered and verified.

## How A2P 10DLC registration works

According to [The Campaign Registry](https://www.campaignregistry.com/), which runs the registry carriers use, brands and campaign service providers are verified before they can send, and businesses can’t register directly; they register through an approved provider. The campaign describes what the texts are for, such as customer care or appointment reminders, with sample messages and how people opt in and out.

Unregistered or mismatched traffic can be filtered or blocked by carriers, and registration and campaign fees may apply through the provider. Toll-free numbers use a separate verification process, and short codes have their own. The practical takeaway: business texting from software needs a registered setup before you rely on it.

## Example: a cleaning company starts texting

A house cleaning company wants an assistant to answer customer texts and send booking confirmations from its business number. Before launch, its texting provider registers the company as a brand and a customer-care campaign, with sample messages and opt-out wording. Texts sent before approval risk being filtered by carriers. This scenario is illustrative.

## Texting with InsertChat

InsertChat’s [AI text messaging](https://insertchat.com/product/sms) replies to customers who text your InsertChat number, honors STOP and START, and sends picture messages to your team. Follow-up texts the assistant proposes always need approval from an owner, admin, or manager and the customer’s consent before they are sent; InsertChat does not run marketing or bulk text campaigns.

Texting depends on the number’s country and carrier, and SMS can carry its own charges on top of your plan. Registration details for your number are not listed on this site, so confirm them with support before relying on texting. See the [cleaning company setup](https://insertchat.com/industries/cleaning).

## Does every business that texts need 10DLC registration?

Businesses sending texts through software from standard US 10-digit numbers are expected to register. Toll-free and short-code numbers follow their own verification rules.

## What happens if I text without registering?

Carriers can filter or block unregistered application-to-person traffic, so messages may never arrive. Providers may also suspend sending until registration is complete.

## Related terms

- [TCPA (Telephone Consumer Protection Act)](https://insertchat.com/glossary/tcpa): The Telephone Consumer Protection Act, or TCPA, is a 1991 US federal law that restricts telemarketing calls, autodialed calls and texts, and calls using prerecorded or artificial voices.
- [Toll-free number](https://insertchat.com/glossary/toll-free-number): A toll-free number is a phone number that callers can dial without being charged for the call, because the business that owns it pays instead.
- [Appointment reminders](https://insertchat.com/glossary/appointment-reminders): Appointment reminders are messages a business sends before a scheduled appointment, usually by text or email, to remind the customer of the date, time, and location and make it easy to confirm or reschedule.
- [Local phone number](https://insertchat.com/glossary/local-phone-number): A local phone number is a standard number with an area code tied to a city or region, also called a geographic number.

## Related InsertChat pages

- [AI text messaging](https://insertchat.com/product/sms)
- [AI receptionist for cleaning companies](https://insertchat.com/industries/cleaning)

## Sources

- [The Campaign Registry: 10DLC](https://www.campaignregistry.com/)