Bangladesh Phone Number Validator

Bangladesh uses a tightly specified mobile numbering plan maintained by the Bangladesh Telecommunication Regulatory Commission (BTRC). Every mobile number follows the same domestic pattern — 01 followed by nine more digits — making format validation straightforward once you know the rules. This validator applies those rules entirely in your browser so you can confirm any number without sending data to a server.

The validator handles the three common ways a Bangladeshi number appears in the wild:

• Domestic format: 01712 345678 (11 digits, leading 0)
• International / E.164 format: +8801712345678 (country code +880, leading 0 dropped)
• Bare subscriber format: 1712345678 (10 digits, no prefix at all)

Input any of these — with or without spaces, dashes, or parentheses — and the tool normalises it, validates it, and displays both canonical forms.

How it works

Step 1 — Normalisation. The input is stripped of spaces, dashes, and parentheses. A leading +880 or 880 country code is removed. A single leading 0 (the domestic trunk prefix) is removed. The result should be exactly 10 digits representing the subscriber number 1XXXXXXXXX.

Step 2 — Length check. Bangladesh mobile subscriber numbers are exactly 10 digits after the country code and trunk prefix are stripped. Fewer or more digits means the number is malformed.

Step 3 — Prefix check. The first digit of the normalised subscriber number must be 1, confirming the “01” domestic prefix that all Bangladesh mobile numbers share. Fixed-line numbers and non-mobile services use different ranges and are out of scope.

Step 4 — Operator digit check. The second digit (positions 01X in domestic format) must be 3, 4, 5, 6, 7, 8, or 9. Digits 0, 1, and 2 have not been allocated by BTRC to any mobile operator. This single digit identifies the network:

Step 5 — Output. Domestic format (01XXXXXXXXX, 11 digits) and E.164 format (+8801XXXXXXXXX, 14 characters including the +) are both displayed with one-click copy buttons.

Worked example

You receive the phone string +880 1912-345678 in a form submission.

1. Normalise. Strip spaces and dashes to get +88019123456789. Remove the +880 country code to get 19123456789. No leading 0 to strip. Subscriber = 1912345678 (10 digits after the leading 1… wait — that gives 10 digits total: 1, 9, 1, 2, 3, 4, 5, 6, 7, 8). Length check passes.

2. Prefix check. First digit is 1. Good — confirms the “01” mobile prefix.

3. Operator digit. Second digit is 9 → Banglalink.

4. Output.

   • Domestic format: 01912345678
   • E.164 format: +8801912345678

The validator shows Valid Bangladesh mobile number, identifies the operator as Banglalink, and offers one-click copy buttons for both the domestic and E.164 forms.

Every calculation runs in your browser — no request is ever made to an external server.