Choosing the Right Number Type for SMS: Local, Toll-Free, or Short Code

The type of phone number you use for SMS affects your delivery speed, compliance requirements, and how recipients perceive your messages.

Number Types Compared

When to Use Each Type

Local numbers (10DLC)

Choose local numbers when:

• You want recipients to see a local area code (builds trust for local businesses).
• You send moderate volume (under 50,000 messages/month).
• You need both calling and texting on the same number.
• You operate in a specific geographic market.

Toll-free numbers

Choose toll-free when:

• You need nationwide reach without a geographic identity.
• You're setting up a support or verification line.
• You want to start sending quickly while 10DLC registration is pending (toll-free verification is often faster).
• You don't need high throughput (3 MPS is sufficient for most support use cases).

Short codes

Choose short codes when:

• You send high-volume campaigns (100,000+ messages).
• You need guaranteed delivery speed (marketing blasts, flash sales, emergency alerts).
• You have the budget and timeline for carrier-by-carrier approval.
• Brand recognition via a memorable short code matters.

Can I Switch Number Types Later?

Yes, but phone numbers themselves don't convert between types. To switch:

1. Get a new number of the desired type.
2. Register it (10DLC, toll-free verification, or short code approval).
3. Update your contacts and messaging flows to use the new number.
4. Optionally port your old number if you want to keep it for calling.

Related Articles

• 10DLC Registration: What It Is and Why You Need It
• SMS and MMS Messaging: What You Can Send
• How to Add a Phone Number