What is an SMS sender ID and how do you get one?

Learn what an SMS sender ID is, how alphanumeric and numeric senders differ, why they need approval and how to choose a name customers will trust and recognise.

What a sender ID is

The sender ID is the name or number that appears at the top of a text message, where you would normally see a contact name. When a business sends an SMS, it can usually choose what appears there, within certain rules. A clinic might send as RiversideCl, a shop as HarbourHome, or a courier from a standard mobile-style number. It is the first thing a recipient sees, and it plays a big part in whether they trust and open the message.

Sender IDs matter more than ever because scam texts are now common. People have learned to be suspicious of unexpected messages from unknown numbers, especially those mentioning parcels, payments or accounts. A consistent, recognisable sender name helps your genuine messages stand out, and it also groups your texts together in the recipient's messaging app, so they can see the history of what you have sent.

A sender ID also shapes the first impression of your business. A tidy, recognisable name suggests an organised company that takes its communication seriously, while a random number or an unfamiliar abbreviation can make even a perfectly genuine message look doubtful. For many small businesses, the sender ID is the only branding a customer sees in a text, so it is worth choosing carefully.

Alphanumeric and numeric sender IDs

There are two broad types. An alphanumeric sender ID is a short name made up of letters, and optionally numbers, such as your brand. In the UK it can be up to 11 characters, and spaces and some punctuation may count towards that limit or be restricted. Alphanumeric senders are ideal for one-way messages such as reminders, updates and offers, because they show your name clearly.

A numeric sender ID is a phone number, either a mobile-style long number or a short code. The main practical difference is that recipients can reply to a number but cannot reply to an alphanumeric name. If you send from a name, always include another way to contact you in the message.

For most businesses starting out with one-way messages, an alphanumeric sender is the sensible default. It is clearer for recipients, works well for reminders and updates, and does not require you to manage incoming replies.

Why sender IDs need approval

Because a sender ID can display any short name, it could be abused to impersonate banks, government departments, delivery firms or other businesses. To protect recipients, sender IDs are checked before they can be used. On Orbis SMS, you request a sender ID from your account and it is reviewed before being enabled. We may ask for evidence that you are entitled to use the name, such as your company registration, trading name or website.

The UK also has an SMS SenderID Protection Registry, run by the Mobile Ecosystem Forum, which helps well-known organisations protect their names from being used by others. If a name you request is similar to a protected or well-known brand, it is likely to be refused. Approval is not guaranteed, and availability can vary by destination and route, so it is worth having a second choice in mind when you apply.

Allow some time for approval before an important send, such as the launch of a reminder service or a seasonal campaign. Requests that include clear supporting evidence are usually quicker to review. If your business trades under a name that differs from your registered company name, explain the connection when you apply, as that helps us understand why you are entitled to use it.

Choosing a good sender name

The best sender ID is the name your customers already use for you. That might be your full business name if it fits, or a clear shortened version. Avoid abbreviations people will not recognise, generic words such as INFO or ALERT, and anything that could be mistaken for another organisation. Keep it consistent across every message you send, so customers learn to expect it.

• Use the name on your shopfront, website or invoices where possible.
• Stay within 11 characters, and check how it looks on a phone screen.
• Avoid generic terms that scammers also use, such as Delivery or Bank.
• If you run several brands, request a separate sender for each.
• Tell customers in advance, for example at checkout, which name you text from.

What to include when you send from a name

Because recipients cannot reply to an alphanumeric sender, your message needs to carry everything they need. Include a phone number, a web address they will recognise or clear instructions on what to do next. For marketing messages, include an opt-out instruction such as Reply STOP to opt out, which Orbis SMS handles for you. Naming your business in the message body is also good practice, even when the sender ID already shows it.

Remember that a sender ID is not proof of identity on its own. Some networks group messages by sender, so a scammer who manages to spoof a name could have their text appear alongside genuine ones. That is one reason to avoid asking for passwords, bank details or payments by text. Telling customers clearly what you will and will not send by SMS helps them spot anything that does not fit.

Requesting a sender ID on Orbis SMS

Once your account is set up, you can request a sender ID from the portal. Tell us the name you would like, how you intend to use it and any evidence that supports your right to it. While your request is being reviewed, you can prepare contacts, groups and templates so you are ready to send when it is approved. If a request is declined, we will explain why where we can and help you choose an alternative.

Sender ID approval is part of keeping the platform trustworthy for everyone. It protects your customers from impersonation and protects legitimate senders from having their messages blocked or ignored because of abuse by others. If you have questions about a particular name, contact support@orbisdigital.co.uk or call 0330 223 7919 before you apply.

Frequently asked questions