SMS Long Codes vs. Short Codes: Key Differences

Choosing the right type of number for your SMS marketing campaigns isn’t always straightforward. With options like dedicated short codes, 10DLC (10-digit long codes), and toll-free numbers, each comes with its own benefits, limitations, and ideal use cases. 

In the past, businesses could choose between shared short codes, dedicated short codes, and standard long codes. However, due to rising spam concerns, shared short codes have been phased out. Today, the most common choices are application-to-person (A2P) longcodes, such as 10DLC or toll-free, and dedicated short codes. 

In this guide, we’ll break down each option to help you choose the best path forward for your texting strategy.

What is an SMS Short Code?

An SMS short code (also known as Common Short Code or CSC) is a 5 or 6-digit number used to send SMS or MMS text marketing campaigns to mobile phones. 

Businesses often choose short codes for mass marketing campaigns, sweepstakes, text-to-join programs, and automated alerts. Known for their high throughput speeds, brand visibility, and reliability at scale, short codes are ideal for mass or bulk texting use cases.

Types of Short Codes

The three primary short code types are: 

• Shared short codes. Previously used by multiple businesses on the same number. No longer allowed due to spam and compliance concerns.‍
• Random dedicated short codes. Randomly assigned 5 or 6-digit numbers used exclusively by one brand.‍
• Vanity dedicated short codes. Custom-selected numbers, often branded (e.g., 811811), that are easier to remember.

Advantages and Drawbacks of Short Codes

Like any number type, there are specific use cases where short codes are more useful and applicable than others. Let’s look at a few key advantages and disadvantages of short codes. 

Advantages: 

• High throughput. Short codes can send hundreds of messages per second. 
• Recognizable. Dedicated numbers are easy to remember and appear consistent across marketing campaigns. 
• Trusted. Short codes are unlikely to be flagged as spam when registered properly. 

Drawbacks:

• Higher cost. Leasing a short code is more expensive than using a 10DLC or toll-free number. 
• Longer setup time. It can take 6 to 10 weeks to gain approval to use a dedicated short code. 
• No voice capabilities. Short codes can’t receive or make voice calls. 

What is an SMS Long Code?

SMS long codes are 10-digit phone numbers that can be used for texting between a business and its customers. 

Long codes have evolved significantly over the years, especially with the introduction of 10DLC (10-digit long codes) and toll-free SMS, both of which are designed for business messaging. 

Types of Long Code Numbers for Business Texting

• 10DLC (local). Local numbers are ideal for businesses that want a familiar, regional presence while remaining compliant with mobile carrier regulations. 
• Toll-Free. Toll-free, or 800 numbers, are cost-effective for high-volume sending and fully capable of handling two-way texting. 
• VoIP. Voice over Internet Protocol numbers are virtual numbers that use internet connection for voice calls, rather than a traditional landline. 

Advantages and Drawbacks to SMS Long Codes

Now that we’ve covered the primary long code number types, let’s dive into the primary advantages and disadvantages of long code numbers. 

Advantages:

• Easy to set up. Long code numbers can typically be approved for use in days (not weeks) and, in many cases, existing numbers such as landlines can be text-enabled quickly and easily. ‍
• Cost-effective. Both 10DLC and toll-free numbers are significantly less expensive than dedicated short codes, making them a practical option for most businesses.‍
• Offer multi-use capabilities. You can use one number to send SMS and MMS messages, make and receive calls and send faxes, creating consistency across all your communication channels.‍
• Better campaign tracking. 10DLC allows for registering campaigns under a single number, offering some exclusivity and tracking benefits similar to dedicated short codes‍
• Provide a human touch. Ten-digit numbers look like they come from real people, not autodialers or bots, forging a better personal experience.  ‍
• Offer two-way text communication. Long codes support conversational SMS, making them ideal for customer service, scheduling, and ongoing engagement.
• ‍Voice enabled. Unlike short codes, both toll-free and 10DLC numbers can support voice calls, allowing for an integrated call/text experience on a single number‍
• Consistency. Whether you talk or text, customers come to recognize your number for all of their needs.

Drawbacks: 

• Lower throughput. 10DLC and toll-free numbers typically have lower throughput rates than short codes.
• ‍Carrier vetting required. Businesses must go through a registration and vetting process to use 10DLC compliantly. This adds a small upfront step, though it's faster than provisioning a short code

Long Code vs. Short Code: Core Differences

In this section, we will break down the core differences to help customers decide between using a short or long code number.

Budget 

• Short codes are leased monthly and can be a significant investment — especially dedicated or vanity codes. 
• Long codes are far more affordable, with lower setup fees and minimal costs. Long codes are typically ideal for small to mid-sized businesses or teams with lower message volume needs. 

Volume and Throughput 

• Short codes support extremely high throughput (up to hundreds of messages per second) making them a strong candidate for enterprise-level or nationwide campaigns. 
• Long codes send at lower rates but are still suitable for most customer communications and moderate promotional sending. 

Appearance 

• Short codes are 5 to 6-digits long, making them easy to recognize and highly brandable. 
• Long codes are standard 10-digit phone numbers, offering a familiar look that may feel more personal or local to recipients. 

Use Case 

• Short codes are generally used for large-scale promos, alerts, voting campaigns, or text-to-join programs. 
• Long codes are best suited for appointment reminders, customer support, order updates, feedback requests, conversational messaging, and moderate promotional campaigns. 

Setup Time 

• Short codes typically take 6 to 12 weeks to use, due to regulatory reviews and required carrier approvals.  
• Long codes can be set up in a few days, making them a faster solution for businesses needing to start sending quickly. 

Voice Support 

• Short codes do not support voice calls, only texting. 
• Long codes can support voice calls, making them more versatile for businesses using phone and SMS together. 

When to Use SMS Long Code vs. SMS Short Code

Choosing between a long and short code comes down to how you plan to use SMS in your business. 

Consider the following key factors to decide which number type aligns best with your goals, budget, and messaging needs.

Top Use Cases for SMS Short Codes

The top use cases for SMS short codes include: 

• Mass promotional campaigns 
• Voting or text-to-win engagement contests
• Emergency or time-sensitive alerts
• Large retail and enterprise use cases 

Top Use Cases for SMS Long Codes

Long code numbers are typically best used for: 

• Customer support and two-way conversations
• Appointment reminders and confirmations 
• Order updates and service alerts
• Localized or personalized outreach 
• Small to medium-sized promotional campaigns 

Start Texting With a Short or Long-Code Number Today

Picking the right type of number for your business isn’t just a technical decision. It impacts how quickly your messages are delivered, how your brand is perceived, and how effectively you’re able to connect with your audience. 

Textedly gives you the flexibility to choose the number that best fits your strategy and gives you the tools you need to succeed. Whether you’re looking for fast, high-volume outreach or personalized, two-way conversations, Textedly makes setup simple and your messages secure.  

Create a free Textedly account to see how Textedly can help you boost customer engagement.