Area Code +31-45-(5660000...5669999) 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 : 5660000 Subscriber Number To : 5669999 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-(5650000...5659999) next › : +31-45-(5670000...5679999) Dialling Instructions For trunk calls: 0 45 5660000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 45 5660000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5660000 ~ 5669999 (Count: 10,000) Example: +31-45-5660000 / 0031-45-5660000 (045-5660000 / 0-45-5660000) +31-45-5660001 / 0031-45-5660001 (045-5660001 / 0-45-5660001) +31-45-5660002 / 0031-45-5660002 (045-5660002 / 0-45-5660002) +31-45-5660003 / 0031-45-5660003 (045-5660003 / 0-45-5660003) +31-45-5660004 / 0031-45-5660004 (045-5660004 / 0-45-5660004) ...+31-45-xxxxxxx / 0031-45-xxxxxxx (045-xxxxxxx / 0-45-xxxxxxx) ...+31-45-5669995 / 0031-45-5669995 (045-5669995 / 0-45-5669995) +31-45-5669996 / 0031-45-5669996 (045-5669996 / 0-45-5669996) +31-45-5669997 / 0031-45-5669997 (045-5669997 / 0-45-5669997) +31-45-5669998 / 0031-45-5669998 (045-5669998 / 0-45-5669998) +31-45-5669999 / 0031-45-5669999 (045-5669999 / 0-45-5669999)