Sender ID Registration in Kenya
Register an SMS Sender ID with CAK — the 2026 guide
A sender ID is the name customers see as the 'from' field on an SMS (e.g. MobiWave). In Kenya, alphanumeric sender IDs are registered with the mobile networks under the Communications Authority of Kenya (CAK) framework. This guide covers who needs one, what documents you need, how long approval takes, and how MobiWave handles it for you at no extra admin fee.
Last updated August 2026
If you send SMS to Kenyan customers — marketing, OTPs, statements or alerts — a registered sender ID is what makes your messages look legitimate and land reliably on Safaricom, Airtel and Telkom. Unregistered or fake sender IDs are increasingly blocked at the network level, so registration is now table stakes, not a nice-to-have.
Before you start
Registered Kenyan business (Certificate of Incorporation)
KRA PIN for the business
Company letterhead for the authorisation letter
Authorised signatory to sign and stamp the request
A sender ID that meets network naming rules (no generic terms)
A clear promotional vs transactional sender ID plan (Safaricom)
How to do it in Kenya
A practical, compliance-aware walkthrough you can follow today.
Choose your sender ID name
Pick a brand-representative alphanumeric ID (up to 11 characters, A–Z, 0–9, no spaces on some networks). Avoid generic words like "INFO" or "BANK" — the networks reject misleading or trademark-infringing names.
Prepare the authorisation letter
Write a signed, stamped letter on company letterhead authorising MobiWave (or your aggregator) to register the sender ID on your behalf, including your business registration and KRA PIN.
Submit to the networks via CAK framework
The request goes to Safaricom, Airtel and Telkom under the CAK-aligned registration process. A separate transactional and promotional sender ID is typically required by Safaricom.
Wait for network approval
Most sender IDs are approved within 1–3 business days. You will be notified once each network confirms the ID is active for outbound sends.
Start sending from the registered ID
Once approved, use the exact registered casing and spelling. MobiWave enforces the 07:00–19:00 promotional window by default to keep you within CAK advertising rules.
Maintain opt-in compliance
Keep a per-MSISDN opt-in ledger and honour STOP-to-unsubscribe. This supports ODPC data-protection alignment and keeps your sender ID in good standing.
How the options compare
The factors that matter for a Kenyan organisation deciding between providers.
| Factor | MobiWave | Africa's Talking | Celcom Africa | Do it yourself |
|---|---|---|---|---|
| Registration fee | Free, handled for you | KES 7,000 / network | KES 7,000 / network | Free but manual |
| Networks covered | Safaricom, Airtel, Telkom | All three | All three | You liaise per carrier |
| Approval time | 1–3 business days | 1–3 business days | 1–3 business days | Variable |
| Promotional + transactional IDs | Both registered | Both | Both | You request each |
| Local support | 24/7 phone + WhatsApp | Developer-only | Business hours | None |
MobiWave handles CAK sender-ID registration for you at no admin fee. Competitors typically charge KES 7,000 per network; a direct self-submission requires a developer portal account and manual follow-up with each carrier.
Sender ID Registration in Kenya questions, answered.
The practical questions Kenyan organisations ask about sender id registration in kenya, with straight answers and KES pricing where it applies.
Still have a question? Talk to us →If you send commercial SMS to Kenyan subscribers, yes. The networks increasingly block unregistered or impersonating sender IDs, so registration is required for reliable delivery on Safaricom, Airtel and Telkom.
Related resources
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