Area Code +381-721-(10100...10109) located in Machine to Machine Communications, more detail is as below. Place International Dialing Code : 381 International Prefix : 00 National Prefix : 0 National Destination Code : 721 Subscriber Number From : 10100 Subscriber Number To : 10109 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 8 Number Type : S (Special) Carrier Name : TELEKOM SRBIJA Click here to buy Serbia Area Code Database Other Information Language Code : sr (Serbian) Country Number : 688 (Serbia) Country Code : RS (Serbia) City : Machine to Machine Communications Timezone : Europe/Belgrade Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 8 Latitude : 44.8000 Longitude : 20.4700 ‹ previous : +381-721-(10090...10099) next › : +381-721-(10110...10119) Dialling Instructions For trunk calls: 0 721 10100 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 381 721 10100 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 10100 ~ 10109 (Count: 10) Example: +381-721-10100 / 00381-721-10100 (0721-10100 / 0-721-10100) +381-721-10101 / 00381-721-10101 (0721-10101 / 0-721-10101) +381-721-10102 / 00381-721-10102 (0721-10102 / 0-721-10102) +381-721-10103 / 00381-721-10103 (0721-10103 / 0-721-10103) +381-721-10104 / 00381-721-10104 (0721-10104 / 0-721-10104) ...+381-721-xxxxx / 00381-721-xxxxx (0721-xxxxx / 0-721-xxxxx) ...+381-721-10105 / 00381-721-10105 (0721-10105 / 0-721-10105) +381-721-10106 / 00381-721-10106 (0721-10106 / 0-721-10106) +381-721-10107 / 00381-721-10107 (0721-10107 / 0-721-10107) +381-721-10108 / 00381-721-10108 (0721-10108 / 0-721-10108) +381-721-10109 / 00381-721-10109 (0721-10109 / 0-721-10109)