Area Code +359-51-(370000...379999) located in Kalojan, Varna (03), more detail is as below. Place International Dialing Code : 359 International Prefix : 00 National Prefix : 0 National Destination Code : 51 Subscriber Number From : 370000 Subscriber Number To : 379999 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 : BTC Click here to buy Bulgaria Area Code Database Other Information Language Code : bg (Bulgarian) Country Number : 100 (Bulgaria) Country Code : BG (Bulgaria) Region Code : 03 Region Name : Varna City : Kalojan Timezone : Europe/Sofia Coordinated Universal Time : +02:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 8 Latitude : 43.4300 Longitude : 27.4100 ‹ previous : +359-51-(360000...369999) next › : +359-51-(380000...389999) Dialling Instructions For trunk calls: 0 51 370000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 359 51 370000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 370000 ~ 379999 (Count: 10,000) Example: +359-51-370000 / 00359-51-370000 (051-370000 / 0-51-370000) +359-51-370001 / 00359-51-370001 (051-370001 / 0-51-370001) +359-51-370002 / 00359-51-370002 (051-370002 / 0-51-370002) +359-51-370003 / 00359-51-370003 (051-370003 / 0-51-370003) +359-51-370004 / 00359-51-370004 (051-370004 / 0-51-370004) ...+359-51-xxxxxx / 00359-51-xxxxxx (051-xxxxxx / 0-51-xxxxxx) ...+359-51-379995 / 00359-51-379995 (051-379995 / 0-51-379995) +359-51-379996 / 00359-51-379996 (051-379996 / 0-51-379996) +359-51-379997 / 00359-51-379997 (051-379997 / 0-51-379997) +359-51-379998 / 00359-51-379998 (051-379998 / 0-51-379998) +359-51-379999 / 00359-51-379999 (051-379999 / 0-51-379999)