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Diego Garcia (British Indian Ocean Territory) phone number format

How do you format a Diego Garcia (British Indian Ocean Territory) phone number?

Write a Diego Garcia (British Indian Ocean Territory) phone number with the country code +246. A mobile looks like 380 1234 inside Diego Garcia (British Indian Ocean Territory) and +246 380 1234 from abroad. Mobiles have 7 digits after the country code, and the E.164 form is +2463801234. Format alone never shows a line is in service.

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Diego Garcia (British Indian Ocean Territory) number format at a glance

Country calling code+246
International prefix (calling out of Diego Garcia (British Indian Ocean Territory))00
Trunk prefix (domestic dialling)None
Mobile number length7 digits after +246
Landline number length7 digits after +246
Mobile vs landline from the digitsYes, separate ranges

In short: +246, 7 digits for a mobile. The checker below formats any Diego Garcia (British Indian Ocean Territory) number free in your browser; it can't say whether a line is live. Bulk phone number validator · Pro + Phone plan

Example Diego Garcia (British Indian Ocean Territory) phone numbers

These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.

FormatMobileLandline
National (inside Diego Garcia (British Indian Ocean Territory))380 1234370 9100
International+246 380 1234+246 370 9100
E.164+2463801234+2463709100

How to write a Diego Garcia (British Indian Ocean Territory) number in E.164

  1. Remove spaces, dashes, dots and brackets so only digits are left.
  2. Diego Garcia (British Indian Ocean Territory) has no trunk prefix, so keep every digit of the national number.
  3. Put +246 in front. The result has 7 digits after the country code for a mobile.

So 380 1234 becomes +2463801234. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.

Mobile or landline?

Diego Garcia (British Indian Ocean Territory) allocates separate number ranges to mobiles and landlines, so a numbering-plan check reads the line type straight from the digits, for free. That type describes the range the number came from. It doesn’t prove the number is connected today.

Mobile, landline and special number ranges in Diego Garcia (British Indian Ocean Territory)

A Diego Garcia (British Indian Ocean Territory) mobile number starts with 38 after +246. Every valid number of each type below starts with one of the digit groups shown. A number that starts the right way can still be unassigned: the groups say what a range is for, not that a number is connected.

TypeStarts with, after +246DigitsExample
Mobile387+246 380 1234
Landline (fixed line)377+246 370 9100

Sources, checked 5 November 2026

Validate a list of Diego Garcia (British Indian Ocean Territory) numbers

Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Pro + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.

Common questions

What is the country code for Diego Garcia (British Indian Ocean Territory)?
The country calling code for Diego Garcia (British Indian Ocean Territory) is +246. When you call Diego Garcia (British Indian Ocean Territory) from abroad, dial your international prefix (or +) followed by 246 and the number.
How many digits is a Diego Garcia (British Indian Ocean Territory) phone number?
A Diego Garcia (British Indian Ocean Territory) mobile number has 7 digits after the country code +246, the same as a landline.
How do I write a Diego Garcia (British Indian Ocean Territory) number in international format?
Start with +246, then add the rest of the number. The mobile number 380 1234 becomes +246 380 1234, or +2463801234 in E.164, the form most CRMs and SMS tools expect.
Can you tell if a Diego Garcia (British Indian Ocean Territory) number is a mobile?
Usually, yes. Diego Garcia (British Indian Ocean Territory) numbers come from ranges allocated separately to mobiles and landlines, so a numbering-plan check reads the line type from the digits. It tells you what the range is for, not whether the number is in service.
Does a valid format mean a Diego Garcia (British Indian Ocean Territory) number is in service?
No. A valid format means the digits fit a range Diego Garcia (British Indian Ocean Territory)'s numbering plan allocates. It cannot tell whether the number is connected today or who carries it, because numbers are reassigned and ported. A live carrier lookup reports the current carrier and line type, but even that does not prove someone answers.
Can I check a list of Diego Garcia (British Indian Ocean Territory) numbers for free?
Yes. Paste them in the list tab above or upload a CSV to the bulk phone number validator: E.164, country, format status and numbering-plan line type are free for every row, with no account. Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month).

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