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UK SMS Sender ID Registration

UK SMS Sender ID Registration

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This Guide explains how to register SMS Sender ID in the UK in order to send outgoing messages.

Created: December 2024

Updated: September 2026

Permalink: https://wildix.atlassian.net/wiki/x/TAbOAQ

Introduction

The United Kingdom's (UK) Mobile Ecosystem Forum (MEF) SMS Sender ID Protection Registry was established to combat fraud, spoofing and phishing. It protects consumers and businesses by enabling companies to register their SMS Sender IDs, preventing fraudsters from impersonating brands. Unregistered Sender IDs are typically blocked by mobile carriers, preventing unauthorized or potentially harmful messages from reaching users. 

By registering your SMS Sender ID, you align with the country’s regulations, protect your brand and keep your communication reliable.

Registration procedure

To register your numbers for SMS sending, follow the procedure described below:

Column

Details

Column

Details

Sender-ID

The name that appears on the recipient's device when they receive a message.

  • Sender ID must be 3 to 11 characters, including spaces. Sender IDs shorter than 3 or longer than 11 characters cannot be registered

  • Generic sender IDs (e.g., Info, Alert) are not allowed as they do not clearly identify the sender

  • Allowed characters are:

    • Uppercase letters: A-Z

    • Lowercase letters: a-z

    • Digits: 0-9

    • Special characters: @ £ $ ¥ è é ù ì ò Ç Ø ø Å å Δ _ Φ Γ Λ Ω Π Ψ Σ Θ Ξ Æ æ ß É (space) ! " # ¤ % & ( ) * + , - . / : ; < = > ? ¡ ä ö ñ ü àt

Name of Organisation

Specify the following details:

  • Company legal name: The official name of the company as registered in legal or government documents

  • Country of registration: The country where the company is legally registered

  • Scope of activity: A brief description of the company's primary operations or industry, e.g., Telecommunications and VoIP services

Message Content sample

A sample of the SMS message(s) to be sent using this Sender ID. This demonstrates compliance with regulations.

Name of person responsible, Contact number and Email

The name and the email address of the primary contact person for the registration process.

SMS Type

Specify the following details:

  • Type of traffic: The nature or purpose of the messages to be sent, such as transactional, informational or promotional (marketing traffic is allowed)

  • Estimated traffic volume: A realistic monthly or yearly estimate, e.g., 10,000 messages per month

Website URL

The company’s official website URL to help verify its legitimacy.

  • Submit a CLASSOUND Customer Care request with the filled out forms:

    • Navigate to Salesforce Partner Community and on the Home page, click Submit a Case button

    • Under Type of your issue, select Customer Care

    • Open Wilma Agent and proceed with your case

Wildix UK SMS Sender ID Registration - Submit a case.png

Once the case is submitted, it can take up to 30 days to complete the registration.