How to choose between short code or long number for business sms

Understanding the basics: short codes and long numbers

When implementing sms software or launching an SMS campaign, one of the first decisions is choosing between a short code and a long number. Both are sender numbers used for sending and receiving SMS, but have different characteristics. Understanding these will help you make the best choice for your business.

What is a short code?

A short code is a 4- to 6-digit number, widely recognized in marketing and customer interaction. Businesses use short codes for mass messaging, two-way SMS, and OTP sms (one-time passwords). They are easy to remember and usually used for high-volume, large-scale campaigns.

What is a long number?

A long number (also known as dedicated virtual mobile number or long code) is a regular phone number in international or local format. Long numbers are ideal for personalised messaging, two-way communication, and international SMS.

The key differences between short codes and long numbers

• Length: Short codes have 4-6 digits; long numbers have 10-15 digits.
• Use case: Short codes push high-volume campaigns; long numbers suit customer service and one-on-one conversations.
• Memorability: Short codes are easier for customers to recall.
• Coverage: Long numbers can often reach internationally, while short codes are country-specific.
• Setup time and cost: Short code acquisition takes longer and is more costly. Long numbers are faster to set up and more affordable.
• Two-way messaging: Both support replies, but regulations differ depending on region.

When to use a short code

• High-volume SMS marketing campaigns
• Brand recognition and trust
• Contests, voting, surveys, or promotions
• Authentication/OTP use (with dedicated setup)
• Regulatory compliance for opt-ins

When to use a long number

• Customer service and support
• Two-way conversations
• International reach
• Transactional messages like order notifications
• Fast deployment with minimal paperwork

Compliance and regulations

Regulations for short codes are stricter. They typically require pre-registration, approval from carriers, and clear opt-in/opt-out mechanisms. Long numbers are easier to obtain, with fewer restrictions, though spam and unsolicited messaging still face legal limitations.

Cost comparison

Short codes are expensive due to carrier fees and longer setup processes. Long numbers use standard SMS rates, often available as part of packages like bulk SMS or sms marketing. For smaller businesses, long numbers are often more budget-friendly.

Integration and platform support

Both short codes and long numbers are supported by Smstools via API (sms gateway), as well as for WhatsApp campaigns with features like WhatsApp newsletter or WhatsApp marketing. Integration with Make.com and Zapier is seamless, allowing easy automation regardless of the sender type.

Example scenarios

• Retail: Use a short code for promotions and discounts; a long number for order updates.
• Banks: OTP via either option, but usually prefer short codes for trust.
• Customer support: Long numbers for personalised support and replies.

Choosing the best option for your business

Assess your SMS volume, audience, regulatory needs, and budget. If brand recognition and high throughput matter, use a short code. If fast setup and flexibility are priorities, choose a long number-based solution. Need help deciding? Try Smstools free and consult with our experts for tailored advice. REGISTER

FAQs: People also ask

• Can I use both short code and long number at once?
  Yes, many businesses leverage both depending on campaign type and region.
• Are replies possible on both options?
  Yes, but reply routes and regulations vary by country and operator.
• Which is best for small businesses?
  Long numbers provide a cost-effective and flexible option.
• Is registration required for both?
  Short codes require pre-registration; long numbers rarely need it.

Start your free SMS trial today with Smstools and discover the ideal setup for your organisation.