Short codes
Short codes are built for scale. Send thousands of messages per minute to customers across Canada, the US, and internationally — all through a short, recognizable number that builds trust with every send.
What is a short code?
A short code is a 5 or 6-digit number used by businesses to send and receive SMS messages at high volume. Unlike a standard 10-digit phone number, short codes are purpose-built for mass messaging. They are pre-approved by carriers, optimized for speed, and designed to handle thousands of messages per minute without the deliverability risks that come with unregistered long codes.
There are two types: shared short codes, where multiple businesses use the same number differentiated by keyword, and dedicated short codes, where the number belongs exclusively to your brand. A dedicated short code means every message your customers receive comes from a number they'll come to associate with you alone.
Reliable bulk texting
Short codes are the simplest and most direct way to reach a large audience at once. Get the reach you need to make meaningful connections reliably — tens of thousands at a time.
Built for High Volume
Short codes are purpose-built for mass messaging. When you need to reach thousands of people at once without sacrificing speed or deliverability, short code is the right tool for the job.
Unparalleled Deliverability
Short codes are pre-approved by carriers, which means better deliverability, fewer filtered messages, and more of your messages landing directly in your customers' hands.
Lightening-fast sending
Short codes are designed to send thousands of messages per minute without delays. When timing is critical — flash sales, emergency alerts, time-sensitive campaigns — short code delivers at the speed your audience expects.
How businesses are using A2P 10DLC
Emergency and mass alerts
Government agencies, municipalities, and large institutions use shortcodes to reach entire communities simultaneously when speed and deliverability are non-negotiable.
Mass marketing campaigns
Retailers, restaurants, and brands use short codes to send promotional offers, flash sales, and loyalty rewards to large subscriber lists — reaching thousands of opted-in customers at once with a single send.
Voting and polling
Media companies, events, and organizations run interactive SMS campaigns where audiences text a keyword to vote, respond, or participate in real time.
Opt-in programs
Short codes are the standard for building SMS subscriber lists. Customers text a keyword to opt in, triggering an automatic confirmation and adding them to your contact list compliantly and instantly.
Two-factor authentication
High-volume platforms use shortcodes to deliver one-time passcodes at scale — where the throughput of a long code simply isn't fast enough to keep up with login demand.
Delivery and order ootifications
E-commerce and logistics companies send order confirmations, shipping updates, and delivery notifications to large customer bases through a single recognizable short code number.
Frequently asked questions
An SMS short code is a 5 or 6-digit phone number used for high-volume, high-throughput messaging. Short codes are easy to remember, commonly used for marketing campaigns, two-factor authentication, alerts, and interactive text programs like voting or contests.
Short codes offer the highest messaging throughput — up to 100 messages per second or more — with excellent deliverability across all major carriers. They're pre-approved for high-volume messaging, so you won't face the filtering or throttling that can affect long codes. Short codes also carry strong brand recognition since they're associated with established businesses.
A dedicated short code is exclusively assigned to your business, giving you full control over keywords, messaging programs, and branding. A shared short code is used by multiple businesses, with each assigned specific keywords. Dedicated short codes are the industry standard — most carriers have phased out shared short codes due to deliverability and compliance concerns.
Contact our team to start the short code provisioning process. We'll help you select or request a specific short code, prepare your use case documentation, and submit it for carrier approval. Swift SMS Gateway manages the application process and carrier relationships on your behalf.
Short code provisioning typically takes 8–12 weeks. This includes carrier review and approval of your messaging program across all major networks. The timeline depends on the complexity of your use case and how quickly documentation is completed. Planning ahead is essential when considering a short code.
Short codes support the highest throughput of any number type, typically 100 messages per second or more. This makes them ideal for time-sensitive campaigns, flash sales, authentication codes, and any use case where you need to reach a large audience quickly.
Yes. Short codes fully support two-way messaging. Recipients can text keywords to your short code to opt in, get information, or interact with your campaigns. You can configure auto-replies, keyword routing, and inbound message handling to create interactive messaging experiences.