Area Code 66 – Thika/Ruiru
The phone area code for Thika/Ruiru is 66 (international format +25466). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Thika/Ruiru
Geographic Coverage and Administrative Jurisdiction
The +254 66 area code is a geographic National Destination Code (NDC) assigned to the Thika and Ruiru regions in Kiambu County, Kenya. Thika, a major industrial and commercial town, lies approximately 40 kilometers northeast of Nairobi, while Ruiru is a rapidly growing satellite town along the Thika Superhighway. The code serves the administrative areas of Thika Sub-County, Ruiru Sub-County, and their environs, including Juja and Gatanga. These areas are part of the greater Nairobi metropolitan region and are served by both fixed-line and mobile operators.
Dialing Formats and Caller Instructions
For callers within Kenya, the local dialing format is 066 XXXXXX (or 66 XXXXXX from mobile phones, as the leading 0 is often dropped). For international callers, the format is +254 66 XXXXXX. The subscriber number is six digits long, making the total national significant number (NSN) nine digits when including the leading 0.
To call a Thika or Ruiru fixed line from abroad, dial your country's international access code, then 254 (Kenya's country code), then 66, followed by the six-digit subscriber number. For example, to call a number 123456 in Thika from the United States, you would dial: 011 254 66 123456. From the UK, it would be 00 254 66 123456.
Overlay and Numbering Considerations
Currently, there is no overlay code for the Thika/Ruiru area; the 066 code is dedicated to this geographic region. However, due to the growth of the region, the Communications Authority of Kenya (CAK) has implemented number portability, allowing subscribers to retain their numbers when switching service providers. This means that a number with the 066 prefix may be served by any licensed operator, but the geographic association remains.
Services and Usage
The 066 code is used for fixed-line services, including PSTN and VoIP-based fixed lines. It is also used by some businesses for dedicated data and voice lines. While mobile numbers in Kenya are non-geographic and begin with 07 or 01, the 066 code is strictly for fixed-line services. Callers should be aware that calls to 066 numbers are typically charged at local or national rates, depending on their own service provider.