Area Code +31-45-(6310000...6319999) located in Heerlen, Limburg (LI), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 45 Subscriber Number From : 6310000 Subscriber Number To : 6319999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Tritone Telecom B.V. Click here to buy Netherlands Area Code Database Other Information Language Code : nl (Dutch) Country Number : 528 (Netherlands) Country Code : NL (Netherlands) Region Code : LI Region Name : Limburg City : Heerlen Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 50.8800 Longitude : 5.9800 ‹ previous : +31-45-(5900000...5909999) next › : +31-45-(6450000...6459999) Dialling Instructions For trunk calls: 0 45 6310000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 45 6310000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6310000 ~ 6319999 (Count: 10,000) Example: +31-45-6310000 / 0031-45-6310000 (045-6310000 / 0-45-6310000) +31-45-6310001 / 0031-45-6310001 (045-6310001 / 0-45-6310001) +31-45-6310002 / 0031-45-6310002 (045-6310002 / 0-45-6310002) +31-45-6310003 / 0031-45-6310003 (045-6310003 / 0-45-6310003) +31-45-6310004 / 0031-45-6310004 (045-6310004 / 0-45-6310004) ...+31-45-xxxxxxx / 0031-45-xxxxxxx (045-xxxxxxx / 0-45-xxxxxxx) ...+31-45-6319995 / 0031-45-6319995 (045-6319995 / 0-45-6319995) +31-45-6319996 / 0031-45-6319996 (045-6319996 / 0-45-6319996) +31-45-6319997 / 0031-45-6319997 (045-6319997 / 0-45-6319997) +31-45-6319998 / 0031-45-6319998 (045-6319998 / 0-45-6319998) +31-45-6319999 / 0031-45-6319999 (045-6319999 / 0-45-6319999)