Area Code +31-50-(3704000...3704999) 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 : 3704000 Subscriber Number To : 3704999 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 : Vodafone Libertel 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-(3690000...3699999) next › : +31-50-(4020000...4029999) Dialling Instructions For trunk calls: 0 50 3704000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 50 3704000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3704000 ~ 3704999 (Count: 1,000) Example: +31-50-3704000 / 0031-50-3704000 (050-3704000 / 0-50-3704000) +31-50-3704001 / 0031-50-3704001 (050-3704001 / 0-50-3704001) +31-50-3704002 / 0031-50-3704002 (050-3704002 / 0-50-3704002) +31-50-3704003 / 0031-50-3704003 (050-3704003 / 0-50-3704003) +31-50-3704004 / 0031-50-3704004 (050-3704004 / 0-50-3704004) ...+31-50-xxxxxxx / 0031-50-xxxxxxx (050-xxxxxxx / 0-50-xxxxxxx) ...+31-50-3704995 / 0031-50-3704995 (050-3704995 / 0-50-3704995) +31-50-3704996 / 0031-50-3704996 (050-3704996 / 0-50-3704996) +31-50-3704997 / 0031-50-3704997 (050-3704997 / 0-50-3704997) +31-50-3704998 / 0031-50-3704998 (050-3704998 / 0-50-3704998) +31-50-3704999 / 0031-50-3704999 (050-3704999 / 0-50-3704999)