Area Code +31-45-(4000000...4009999) 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 : 4000000 Subscriber Number To : 4009999 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 : KPN 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-(3720000...3720999) next › : +31-45-(4040000...4049999) Dialling Instructions For trunk calls: 0 45 4000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 45 4000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4000000 ~ 4009999 (Count: 10,000) Example: +31-45-4000000 / 0031-45-4000000 (045-4000000 / 0-45-4000000) +31-45-4000001 / 0031-45-4000001 (045-4000001 / 0-45-4000001) +31-45-4000002 / 0031-45-4000002 (045-4000002 / 0-45-4000002) +31-45-4000003 / 0031-45-4000003 (045-4000003 / 0-45-4000003) +31-45-4000004 / 0031-45-4000004 (045-4000004 / 0-45-4000004) ...+31-45-xxxxxxx / 0031-45-xxxxxxx (045-xxxxxxx / 0-45-xxxxxxx) ...+31-45-4009995 / 0031-45-4009995 (045-4009995 / 0-45-4009995) +31-45-4009996 / 0031-45-4009996 (045-4009996 / 0-45-4009996) +31-45-4009997 / 0031-45-4009997 (045-4009997 / 0-45-4009997) +31-45-4009998 / 0031-45-4009998 (045-4009998 / 0-45-4009998) +31-45-4009999 / 0031-45-4009999 (045-4009999 / 0-45-4009999)