There are three sanctioned ways to send business SMS to US customers: registered local numbers (10DLC), verified toll-free numbers, and dedicated short codes. They differ sharply in cost, throughput, setup time, and how your sender looks to recipients. Here is how to choose.
The three options at a glance
| Factor | 10DLC | Toll-free | Short code |
|---|---|---|---|
| Number format | Local 10-digit (e.g. 415-555-0198) | 8XX 10-digit | 5–6 digits (e.g. 894-46) |
| Setup | Brand + campaign registration, days to ~4 weeks | Verification form, days to weeks | Carrier approval, typically 8–12 weeks |
| Typical cost | Low: one-time + a few $/month + per-segment surcharges | Low-moderate | High: hundreds to ~$1,000+/month lease |
| Throughput | Moderate; tied to trust score | Moderate-high | Very high (hundreds of msgs/sec) |
| Voice calls | Yes | Yes | No |
| Local presence feel | Yes | No | No |
When 10DLC is the right choice
For most small and mid-size businesses, 10DLC is the default answer. Choose it when:
- You want a local identity. Customers recognize and answer local area codes; a dental office in Austin texting from a 512 number feels right.
- You also call. 10DLC numbers handle voice and SMS on the same number, so your existing business line can (after registration) send your reminders.
- Your volume is modest. Appointment reminders, order updates, two-way customer conversations, and small-list marketing fit comfortably within 10DLC throughput.
- Cost matters. 10DLC is by far the cheapest registered route.
The catch: registration. You must complete brand and campaign registration, and your throughput depends on your trust score.
When toll-free texting wins
Verified toll-free is the pragmatic middle path. Choose it when:
- You need a single national number for support or notifications and local presence is irrelevant.
- You want lighter paperwork. Toll-free verification is a single form about your business and use case: no brand/campaign structure, no TCR fees.
- Your volume is above small-business 10DLC tiers but does not justify a short code.
Downsides: recipients see an 8XX number, which reads more corporate and can depress response rates for conversational use; and unverified toll-free traffic is blocked, so verification is just as mandatory as 10DLC registration.
When you actually need a short code
Short codes are for scale. Choose one when:
- You send very high volume, such as flash sales to hundreds of thousands of subscribers or national alert programs.
- Speed of delivery is critical: polls, voting, time-boxed promotions where all messages must land within minutes.
- You run keyword-driven acquisition at scale ("Text JOIN to 55555").
You pay for it: short code leases run into hundreds or thousands of dollars per month, approval takes two to three months, and the number cannot receive voice calls.
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- Sending under ~10,000 messages/day and want local presence or voice on the same number? 10DLC.
- Need one national number, moderate-to-high volume, minimal setup friction? Toll-free.
- Six-figure send lists or time-critical blasts? Short code (or split: short code for blasts, 10DLC for conversations).
Whichever route you choose, the compliance fundamentals are identical: express consent before the first message, honored opt-outs, no prohibited content, and a privacy policy that covers SMS data. Carriers filter all three number types for spam; registration buys you a lane, not immunity.
Frequently asked questions
Can I use my existing business phone number for 10DLC?
Yes. If the number is hosted with (or ported/hosted for messaging to) a provider that supports A2P 10DLC, it can be added to a registered campaign and send A2P traffic while keeping voice service.
Is toll-free texting cheaper than 10DLC?
Toll-free avoids TCR registration fees but per-message carrier surcharges differ, and toll-free numbers cost slightly more to rent. For low volumes the totals are comparable; 10DLC usually edges out toll-free on pure cost.
Can I share a short code with other businesses?
No. Shared short codes were phased out by US carriers years ago. Short codes must be dedicated to a single brand, which is a large part of their cost.