Area Code +31-50-(4020000...4029999) located in Groningen, Groningen (GR), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 50 Subscriber Number From : 4020000 Subscriber Number To : 4029999 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 : GR Region Name : Groningen City : Groningen Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 53.2100 Longitude : 6.5700 ‹ previous : +31-50-(3704000...3704999) next › : +31-50-(4030000...4039999) Dialling Instructions For trunk calls: 0 50 4020000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 50 4020000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4020000 ~ 4029999 (Count: 10,000) Example: +31-50-4020000 / 0031-50-4020000 (050-4020000 / 0-50-4020000) +31-50-4020001 / 0031-50-4020001 (050-4020001 / 0-50-4020001) +31-50-4020002 / 0031-50-4020002 (050-4020002 / 0-50-4020002) +31-50-4020003 / 0031-50-4020003 (050-4020003 / 0-50-4020003) +31-50-4020004 / 0031-50-4020004 (050-4020004 / 0-50-4020004) ...+31-50-xxxxxxx / 0031-50-xxxxxxx (050-xxxxxxx / 0-50-xxxxxxx) ...+31-50-4029995 / 0031-50-4029995 (050-4029995 / 0-50-4029995) +31-50-4029996 / 0031-50-4029996 (050-4029996 / 0-50-4029996) +31-50-4029997 / 0031-50-4029997 (050-4029997 / 0-50-4029997) +31-50-4029998 / 0031-50-4029998 (050-4029998 / 0-50-4029998) +31-50-4029999 / 0031-50-4029999 (050-4029999 / 0-50-4029999)