Kenya phone number validator
How the phone number format works
- Format
- Kenya phone number in national or international (+254) format
- Example
- +254712123456
Things to watch for
- Accepts national or international (E.164, e.g. +254...) format
- Validated with Google's libphonenumber; confirms the number is possible/valid for this country, not that it is currently assigned or reachable
^[+]?[0-9 ()\-]{6,}$A Kenyan mobile number is 10 digits in national form, starting with 07 followed by eight more digits (0712 345 678). That leading 0 is a trunk prefix, dropped the instant +254 is added, so a number written domestically as 0712345678 becomes +254712345678 internationally — nine digits after the country code, not ten. As demand for 07-prefixed ranges filled up, newer mobile numbers starting 01 were introduced, following the identical length and drop-the-0 pattern.
How this validator works
Enter the number as dialled locally (0712 345 678) or in full international form (+254712345678); this tool checks the 10-digit national length and the mobile prefix against Kenya’s real numbering plan using Google’s libphonenumber, entirely client-side. The most common failure here is a kept leading 0 after +254 — typing +2540712345678 instead of +254712345678 — which adds a digit and fails validation immediately.
What a pass doesn’t tell you
A pass confirms the number matches a real Kenyan mobile shape — it doesn’t confirm the SIM is active or currently topped up. Kenya’s mobile money ecosystem means a number can look perfectly valid and still be dormant or reassigned.
Scope: catch a missing digit, a wrong prefix, or a leftover 0 after +254 before a Kenyan number reaches a form or SMS platform — not proof it’s reachable today.
Content last reviewed 2026-07-07.
phone number FAQ
Why does a Kenyan mobile number lose a digit when written as +254?
The leading 0 in 0712 345 678 is a national trunk prefix, not part of the subscriber number — it's dropped the moment +254 is added, so the correct international form is +254712345678: nine digits after the country code, not ten.
How many digits does a Kenyan mobile number have in national form?
Ten, always starting with 07 followed by eight more digits. Newer mobile ranges starting 01 have also been issued as demand for 07-prefixed numbers grew, following the same 10-digit, drop-the-0 pattern.
Does a valid check confirm a Kenyan number is active on a network?
No. It only confirms the digits match a real Kenyan mobile pattern recognized under the Communications Authority's numbering plan — not that the SIM is currently topped up or reachable, which needs a carrier-side lookup this tool doesn't perform.