Ideal
Morning
local
EST (UTC−5)
PST (UTC−8)
+246 · UTC+6
Best Time to Call
British Indian Ocean Territory
from the United States
The British Indian Ocean Territory's +246 code effectively serves a single joint UK–US military installation on Diego Garcia, not a civilian population. From the US East Coast, business hours in British Indian Ocean Territory fall between 10:00 PM and 6:00 AM EST.
Best EST: 10:00 PM – 6:00 AM (+1 day)
Mon–Fri
United States
05:57 PM
Outside office
10h
difference
British Indian Ocean Territory
03:57 AM
Sleeping
// Best Time to Call
When to Call British Indian Ocean Territory
A 9-to-5 day in Diego Garcia never overlaps one in New York — at 9:00 AM ET it is 8:00 PM there — so reach them 10:00 PM–6:00 AM ET or leave a message.
Ideal
Afternoon
local
EST (UTC−5)
PST (UTC−8)
Avoid
Avoid
local
EST (UTC−5)
PST (UTC−8)
| Local Time | UTC | EST / New York | CST / Chicago | PST / LA |
|---|---|---|---|---|
| Open | ||||
| Noon | ||||
| PM | ||||
| Close |
US columns use standard time (EST/CST/PST); between the second Sunday in March and the first Sunday in November, US clocks are one hour later.
// Calling Guide
How to call British Indian Ocean Territory — the short version.
Dialing steps
- 1Dial your exit code — 011 from the US and Canada, 00 from most of Europe.
- 2Add the British Indian Ocean Territory country code: +246.
- 3Enter the national number. If it's written with a domestic trunk prefix (often a leading 0), that prefix is usually dropped after the country code.
Best time to call
- 9:00 AM – 5:00 PM in Diego Garcia is 10:00 PM – 6:00 AM EST.
- A 9-to-5 day in Diego Garcia never overlaps one in New York — at 9:00 AM ET it is 8:00 PM there — so reach them 10:00 PM–6:00 AM ET or leave a message.
Quick tips
- Working days: Mon–Fri.
// Calling Etiquette
Calling etiquette in British Indian Ocean Territory
Calling culture
There's no civilian business culture to describe. The territory's population is limited to military personnel and support contractors; the indigenous Chagossian population was relocated by the UK government between the late 1960s and 1973, and no civilian community has since been permitted to resettle.
Working week
Mon–Fri.
Free tools
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Frequently Asked
Calling British Indian Ocean Territory — Common Questions
Everything you need to know about reaching contacts in British Indian Ocean Territory.
Calls outside local business hours in British Indian Ocean Territory are less likely to be answered live, but Rozper's AI receptionist and voicemail-to-text still capture the call and notify your team immediately — so you're not limited to the 10:00 PM–6:00 AM EST overlap.
There's no civilian or business audience here — this isn't a realistic market for a virtual phone number product.
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