Short code vs 10DLC vs toll-free: choosing your SMS number type

Before you send a single business text, you have to pick a number type — and the choice affects your throughput, cost, setup time, and deliverability. The three options in the US are short codes, A2P 10DLC local numbers, and toll-free numbers. Here's how they compare. This is general, practical information, not legal or carrier-policy advice.

The three options at a glance

Short code — a 5–6 digit number (like 12345) purpose-built for A2P messaging at scale.
10DLC — a standard 10-digit local number (a "10-digit long code") registered for A2P use.
Toll-free — a nationwide number (like 800/888/877) that supports both voice and SMS.

Each exists to carry legitimate business messages, but they differ in capacity, cost, and effort.

Short codes

Short codes are the heavyweight option, designed for the highest volumes and throughput. They're what large enterprises often use for things like nationwide alerts and high-scale campaigns.

Throughput: The highest of the three.
Setup: The most involved — a formal application and carrier provisioning process that takes the longest.
Cost: The most expensive, typically a recurring lease plus setup.
Best for: Very high-volume senders who need maximum throughput and can absorb the cost and lead time.

A2P 10DLC

10DLC uses ordinary local numbers, made legitimate for A2P through registration with The Campaign Registry. It's the most common path for businesses today.

Throughput: Tied to your brand's trust score and campaign use case — scalable, and further expandable with more numbers and brand vetting.
Setup: Register your brand and each campaign. Faster and cheaper than a short code, though it still requires proper registration.
Cost: Generally the most accessible, with registration fees plus per-number costs.
Best for: Most businesses — from small senders to high-volume teams that scale via number pools and vetting.

Toll-free

Toll-free numbers are nationwide and recognizable, and they handle both calls and texts, which makes them convenient when you want a single number for voice and SMS.

Throughput: Good once verified — higher than unverified traffic by a wide margin.
Setup: Requires toll-free verification (business details, use case, samples, opt-in). Lighter than a short code, comparable in spirit to 10DLC campaign registration.
Cost: Moderate.
Best for: Businesses that want a nationwide number, need voice plus SMS on one line, or prefer toll-free's recognizability.

How to choose

Ask yourself:

What's my volume? Extremely high and throughput-critical points toward short codes. Moderate to high, with room to scale, fits 10DLC. Toll-free works well for many use cases once verified.
What's my budget and timeline? Short codes cost the most and take the longest. 10DLC and toll-free are faster and more affordable to stand up.
Do I need voice too? Toll-free numbers handle both calls and texts on one number.
Do I want to scale gradually? 10DLC number pools plus brand vetting let you grow capacity incrementally.

Many high-volume teams run 10DLC number pools because they scale flexibly: capacity grows as you add active numbers and improve your trust score, without the cost and lead time of a short code.

Whichever you choose: register or verify it

The common thread across all three is legitimacy. Short codes are provisioned and approved, 10DLC numbers are registered by brand and campaign, and toll-free numbers are verified. Sending A2P traffic on an unregistered or unverified number is the fastest route to filtering.

How Fivra fits in

Fivra's broadcasting pipeline sends within carrier limits regardless of number type — throttled and sub-batched, with capacity scaling as your active number pool grows — and STOP handling is automatic. Registration and verification are completed for your numbers through the appropriate carrier processes; the platform is built to send that traffic in a carrier-friendly way.

FAQ

What's the difference between a short code and a 10DLC number?

A short code is a 5–6 digit number built for very high-volume A2P messaging with the highest throughput, the most involved setup, and the highest cost. A 10DLC number is a standard 10-digit local number registered through The Campaign Registry, with throughput tied to your trust score — cheaper and faster to set up.

Which number type has the highest throughput?

Short codes offer the highest throughput. 10DLC throughput depends on your trust score and use case and scales with number pools and vetting. Verified toll-free numbers also support solid throughput, well above unverified traffic.

Is toll-free good for high-volume messaging?

Verified toll-free numbers can support high-volume messaging and are convenient when you want a nationwide number that handles both voice and SMS. Verification is required for good throughput; unverified toll-free traffic is heavily throttled.

Which is cheapest and fastest to set up?

A2P 10DLC is generally the most accessible to start, with registration fees plus per-number costs and a faster setup than short codes. Toll-free is moderate. Short codes are the most expensive and take the longest to provision.

Can I use more than one number type?

Yes. Some businesses use a combination — for example, 10DLC for local presence and toll-free for a nationwide line, or a short code for the highest-volume campaigns. Each number must be registered or verified for the traffic it carries.

Does Fivra work with all three number types?

Fivra sends within carrier limits across number types, with throttled, sub-batched delivery and automatic STOP handling. High-volume teams often use 10DLC number pools that scale as capacity grows. Registration and verification happen through the appropriate carrier processes.