BTCL South-East Zone, including Chattogram, Cumilla, Noakhali, Feni, Cox’s Bazar and the Chittagong Hill Tracts. This guide separates the geographic code or numbering range from country calling code +880 and explains domestic and international formats.
BTRC defines BTCL NDC 23 as operator digit 2 plus South-East Zone digit 3. The official 2017 plan uses the older English spellings Chittagong and Comilla.
This schematic summarizes the published numbering association without inventing precise geographic boundaries.
BTCL South-East Zone, including Chattogram, Cumilla, Noakhali, Feni, Cox’s Bazar and the Chittagong Hill Tracts
Area code 023 is published for BTCL South-East Zone, including Chattogram, Cumilla, Noakhali, Feni, Cox’s Bazar and the Chittagong Hill Tracts in Bangladesh.
It should be interpreted as a numbering-plan association, not a live geolocation result.
Bangladesh Standard Time (BST), UTC+6 year-round
Asia/Dhaka: Calculated in your browser
Where a code spans several zones, confirm the destination city before calling.
Bangladesh replaced its 2005 framework with the Bangladesh National Numbering Plan 2017, which standardised a ten-digit PSTN national significant number and defined five geographic zones. BTCL later began replacing legacy eight-, nine- and ten-digit domestic fixed-line numbers with 11-digit domestic numbers under its modernisation programme; an official 2022 notice documents that migration in several districts.
BTRC defines BTCL NDC 23 as operator digit 2 plus South-East Zone digit 3. The official 2017 plan uses the older English spellings Chittagong and Comilla.
“Nearby” means related entries in this country directory, not a guarantee of a shared physical border.
BTCL South-West Zone, including Khulna, Barishal, Jashore, Kushtia and Faridpur
BangladeshBTCL North-West Zone, including Rajshahi, Rangpur, Bogura, Dinajpur and Pabna
BangladeshBTCL North-East Zone, including Sylhet, Mymensingh, Tangail, Jamalpur and other districts listed by BTRC
BangladeshBTCL Central Zone, including the Dhaka multi-exchange area and selected nearby district headquarters
Administrative units and telephone zones are different entity types; the list reflects featured city associations only.
The directory includes verified or clearly qualified city associations and does not claim exhaustive coverage.
Current operator and market-share data are dynamic. This page avoids assigning a specific number to a carrier from its area code alone.
Area code 023 is presented as a geographic fixed-line identifier. Consult Bangladesh Telecommunication Regulatory Commission (BTRC) for current allocation or licensing information.
Wireless numbers commonly use separate ranges. Number portability prevents reliable current-carrier identification from a prefix alone.
Domestic code: 023
International prefix: +880 23
A number beginning +880 23 matches this numbering pattern. Keep the remaining subscriber digits intact. This directory does not perform reverse lookup or identify a private subscriber.
023 is published for BTCL South-East Zone, including Chattogram, Cumilla, Noakhali, Feni, Cox’s Bazar and the Chittagong Hill Tracts in Bangladesh.
Use +880 23 followed by the subscriber number; remove the domestic trunk prefix where applicable.
No. It describes a numbering-plan association, while portability, forwarding and internet calling can separate a number from the caller’s current location.