Area Code +31-172-(728000...728999) located in Alphen aan den Rijn, Zuid-Holland (ZH), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 172 Subscriber Number From : 728000 Subscriber Number To : 728999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Voiceworks 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 : Alphen aan den Rijn Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.1300 Longitude : 4.6600 ‹ previous : +31-172-(727000...727999) next › : +31-172-(729000...729999) Dialling Instructions For trunk calls: 0 172 728000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 172 728000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 728000 ~ 728999 (Count: 1,000) Example: +31-172-728000 / 0031-172-728000 (0172-728000 / 0-172-728000) +31-172-728001 / 0031-172-728001 (0172-728001 / 0-172-728001) +31-172-728002 / 0031-172-728002 (0172-728002 / 0-172-728002) +31-172-728003 / 0031-172-728003 (0172-728003 / 0-172-728003) +31-172-728004 / 0031-172-728004 (0172-728004 / 0-172-728004) ...+31-172-xxxxxx / 0031-172-xxxxxx (0172-xxxxxx / 0-172-xxxxxx) ...+31-172-728995 / 0031-172-728995 (0172-728995 / 0-172-728995) +31-172-728996 / 0031-172-728996 (0172-728996 / 0-172-728996) +31-172-728997 / 0031-172-728997 (0172-728997 / 0-172-728997) +31-172-728998 / 0031-172-728998 (0172-728998 / 0-172-728998) +31-172-728999 / 0031-172-728999 (0172-728999 / 0-172-728999)