What is 10DLC (10-Digit Long Code)?

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A 10-digit long code (10DLC) is a 10-digit phone number used for business messaging in the US. It requires a special registration process and must comply with US messaging guidelines.

Also called A2P 10DLC, this type of number was introduced as a substitute for businesses using P2P numbers and unsanctioned shared short codes. 10DLCs are easier and quicker to set up than short codes, have lower setup and monthly costs, and support a growing number of business messaging use cases.

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Explore more about 10DLC in the posts below:

Photo of a smiling man looking at his phone, with an SMS notification overlay. The message is from “(555) 345 6789” and reads, “Hi Frank, your order has been shipped! It will arrive in 3-4 businesses days. Track your order here: track.com.”

10DLC registration: A step-by-step guide for A2P messaging.
Graphic of a smartphone with an SMS notification and a small photo of a man in a grocery store looking at his phone. The SMS text reads, “Hi [Name], your order #[Order Number] is ready for pickup. Visit [Location] anytime today. Thank you for choosing [Business Name]!”

A2P 10DLC guide: 2026 US compliance and regulations.
Person using a smartphone outdoors, surrounded by example SMS messages from different senders, including a welcome discount offer, a delivery notification, and a low‑stock cart reminder, illustrating omnichannel customer engagement.

10DLC vs short code vs toll-free: How to choose the right number.

Elections: How SMS and 10DLC can increase voter engagement and combat misinformation.