Area Code +880-31-(670000...689999) located in Chittagong, Chittagong (10), more detail is as below. Place International Dialing Code : 880 International Prefix : 00 National Prefix : 0 National Destination Code : 31 Subscriber Number From : 670000 Subscriber Number To : 689999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 8 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : BTTB Click here to buy Bangladesh Area Code Database Other Information Language Code : bn (Bengali) Country Number : 50 (Bangladesh) Country Code : BD (Bangladesh) Region Code : 10 Region Name : Chittagong City : Chittagong Timezone : Asia/Dhaka Coordinated Universal Time : +06:00 Daylight Saving Time : No National Significant Number Minimum Length : 8 Latitude : 22.3700 Longitude : 91.8000 ‹ previous : +880-31-(650000...659999) next › : +880-31-(710000...729999) Dialling Instructions For trunk calls: 0 31 670000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 880 31 670000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 670000 ~ 689999 (Count: 20,000) Example: +880-31-670000 / 00880-31-670000 (031-670000 / 0-31-670000) +880-31-670001 / 00880-31-670001 (031-670001 / 0-31-670001) +880-31-670002 / 00880-31-670002 (031-670002 / 0-31-670002) +880-31-670003 / 00880-31-670003 (031-670003 / 0-31-670003) +880-31-670004 / 00880-31-670004 (031-670004 / 0-31-670004) ...+880-31-xxxxxx / 00880-31-xxxxxx (031-xxxxxx / 0-31-xxxxxx) ...+880-31-689995 / 00880-31-689995 (031-689995 / 0-31-689995) +880-31-689996 / 00880-31-689996 (031-689996 / 0-31-689996) +880-31-689997 / 00880-31-689997 (031-689997 / 0-31-689997) +880-31-689998 / 00880-31-689998 (031-689998 / 0-31-689998) +880-31-689999 / 00880-31-689999 (031-689999 / 0-31-689999)