Area Code +31-71-(3690000...3699999) located in Leiden, Zuid-Holland (ZH), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 71 Subscriber Number From : 3690000 Subscriber Number To : 3699999 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 : ZH Region Name : Zuid-Holland City : Leiden Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.1600 Longitude : 4.4900 ‹ previous : +31-71-(3680000...3689999) next › : +31-71-(4004000...4008999) Dialling Instructions For trunk calls: 0 71 3690000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 71 3690000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3690000 ~ 3699999 (Count: 10,000) Example: +31-71-3690000 / 0031-71-3690000 (071-3690000 / 0-71-3690000) +31-71-3690001 / 0031-71-3690001 (071-3690001 / 0-71-3690001) +31-71-3690002 / 0031-71-3690002 (071-3690002 / 0-71-3690002) +31-71-3690003 / 0031-71-3690003 (071-3690003 / 0-71-3690003) +31-71-3690004 / 0031-71-3690004 (071-3690004 / 0-71-3690004) ...+31-71-xxxxxxx / 0031-71-xxxxxxx (071-xxxxxxx / 0-71-xxxxxxx) ...+31-71-3699995 / 0031-71-3699995 (071-3699995 / 0-71-3699995) +31-71-3699996 / 0031-71-3699996 (071-3699996 / 0-71-3699996) +31-71-3699997 / 0031-71-3699997 (071-3699997 / 0-71-3699997) +31-71-3699998 / 0031-71-3699998 (071-3699998 / 0-71-3699998) +31-71-3699999 / 0031-71-3699999 (071-3699999 / 0-71-3699999)