Area Code +31-45-(5730000...5739999) 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 : 5730000 Subscriber Number To : 5739999 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-(5720000...5729999) next › : +31-45-(5740000...5749999) Dialling Instructions For trunk calls: 0 45 5730000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 45 5730000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5730000 ~ 5739999 (Count: 10,000) Example: +31-45-5730000 / 0031-45-5730000 (045-5730000 / 0-45-5730000) +31-45-5730001 / 0031-45-5730001 (045-5730001 / 0-45-5730001) +31-45-5730002 / 0031-45-5730002 (045-5730002 / 0-45-5730002) +31-45-5730003 / 0031-45-5730003 (045-5730003 / 0-45-5730003) +31-45-5730004 / 0031-45-5730004 (045-5730004 / 0-45-5730004) ...+31-45-xxxxxxx / 0031-45-xxxxxxx (045-xxxxxxx / 0-45-xxxxxxx) ...+31-45-5739995 / 0031-45-5739995 (045-5739995 / 0-45-5739995) +31-45-5739996 / 0031-45-5739996 (045-5739996 / 0-45-5739996) +31-45-5739997 / 0031-45-5739997 (045-5739997 / 0-45-5739997) +31-45-5739998 / 0031-45-5739998 (045-5739998 / 0-45-5739998) +31-45-5739999 / 0031-45-5739999 (045-5739999 / 0-45-5739999)