British Indian Ocean Territory country codes

British Indian Ocean Territory at a glance

The ISO country identifiers for British Indian Ocean Territory are IO, IOT, and 086. Select the format your form or system requests.

Namename

British Indian Ocean Territory

Native name in sourcenative_name

British Indian Ocean Territory

Capital / administrative centrecapital

Diego Garcia

Continentcontinent

Asia (AS)

Regionregion

Africa

Sub-regionsub_region

Sub-Saharan Africa

Calling prefixes, currency & internet domain

International calling prefixdial_code

+246

Currency referencecurrency_code

USDUS Dollar

Country-code domaintld

.io

A listed telephone prefix may combine a shared country calling code with an area code. It is not a complete phone number.

Languages & native names

Languages listed for British Indian Ocean Territory in the reference source, with native language names where available. This is not an exhaustive list of the languages spoken or a statement of their legal status.

The small codes are source language tags. A tag such as en-US includes a language and a regional variant; it is different from an ISO country code on its own.

British Indian Ocean Territory time zones

1 identifier is listed for IO in IANA zone.tab, release 2026d. Time-zone identifiers describe clock-rule locations, not fixed UTC offsets.

• Indian/Chagos

UTC offsets and daylight-saving rules depend on the date and location. Use the time-zone converter to compare local times for a chosen date.

ISO, sporting & legacy identifiers

These code systems serve different purposes. Similar-looking codes can refer to different places or organisations.

ISO alpha-2iso_alpha_2

IO

ISO alpha-3iso_alpha_3

IOT

ISO numericiso_numeric

086

FIFA referencefifa

Not listed / not usable in source

IOC referenceioc

Not listed / not usable in source

Legacy FIPS-style referencefips

IO

FIFA and IOC values are source references, not confirmation of current membership or event participation. FIPS 10-4 was withdrawn in 2008; legacy FIPS-style values are for interpreting older datasets and must not replace current ISO codes.

Sources & reference notes

The base record is from ListBase.org v2026.08. English and native country names use Annexare Countries, language names use Annexare and runtime display-name data, time zones use IANA 2026d, and the locally hosted flag is from flag-icons.