Area Code 37 – Banaba

Overview of Area Code 37 (Banaba)

Area code 37 is a geographic National Destination Code (NDC) assigned to the island of Banaba, also known as Ocean Island, within the Republic of Kiribati. This code is part of the Kiribati national numbering plan, which adheres to ITU-T E.164 recommendations. Banaba is a raised coral island located in the western Pacific Ocean, and its telecommunications infrastructure is managed under the broader Kiribati network, primarily operated by the state-owned incumbent, Telecom Services Kiribati Ltd (TSKL).

Geographic Coverage and Administration

Banaba is one of the most remote islands in Kiribati, situated approximately 400 kilometers west of the Gilbert Islands group. Historically significant for its phosphate mining, the island now has a small population, with the main settlement being Antereen. The area code 37 covers the entire island, including all administrative and residential areas. For callers within Kiribati, the national significant number (NSN) for Banaba numbers is typically seven digits, beginning with the NDC 37 followed by a five-digit subscriber number (e.g., 37XXXXX).

Dialing Formats

• Local dialing (within Kiribati): To call a Banaba number from another part of Kiribati (e.g., Tarawa), you dial the full NSN: 37XXXXX. The national trunk prefix is not required for on-island calls.
• International dialing (from outside Kiribati): Callers must use the international access prefix (e.g., 00 or +), followed by the Kiribati country code 686, then the area code and subscriber number: +686 37XXXXX. For example, a call to a Banaba number might be dialed as +686 37 12345.

Overlay and Numbering Considerations

Kiribati does not currently employ overlay codes for geographic areas; each island or island group has a distinct NDC. The numbering plan is closed, meaning the NDC is always dialed even for local calls within the same island. This simplifies routing and ensures that all calls are correctly directed to the appropriate exchange on Banaba.

Caller Instructions

• Local callers: If you are on Banaba and wish to call another number on the same island, you still need to dial the full seven-digit NSN (including 37).
• International callers: Always replace the international access code with the plus sign (+) when using a mobile phone. Ensure you have the correct country code (686) and omit any leading zero that might be used in domestic dialing.

Given the island's small population and limited infrastructure, most lines are fixed-line PSTN connections, though mobile services are gradually expanding. For the most accurate and up-to-date number assignments, consult the national regulatory authority or your telecom provider.