Area Code +31-20-(2310000...2319999) located in Amsterdam, Noord-Holland (NH), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 20 Subscriber Number From : 2310000 Subscriber Number To : 2319999 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 : Hilf Telecom 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 : NH Region Name : Noord-Holland City : Amsterdam Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.3700 Longitude : 4.8900 ‹ previous : +31-20-(2300000...2309999) next › : +31-20-(2320000...2329999) Dialling Instructions For trunk calls: 0 20 2310000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 20 2310000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2310000 ~ 2319999 (Count: 10,000) Example: +31-20-2310000 / 0031-20-2310000 (020-2310000 / 0-20-2310000) +31-20-2310001 / 0031-20-2310001 (020-2310001 / 0-20-2310001) +31-20-2310002 / 0031-20-2310002 (020-2310002 / 0-20-2310002) +31-20-2310003 / 0031-20-2310003 (020-2310003 / 0-20-2310003) +31-20-2310004 / 0031-20-2310004 (020-2310004 / 0-20-2310004) ...+31-20-xxxxxxx / 0031-20-xxxxxxx (020-xxxxxxx / 0-20-xxxxxxx) ...+31-20-2319995 / 0031-20-2319995 (020-2319995 / 0-20-2319995) +31-20-2319996 / 0031-20-2319996 (020-2319996 / 0-20-2319996) +31-20-2319997 / 0031-20-2319997 (020-2319997 / 0-20-2319997) +31-20-2319998 / 0031-20-2319998 (020-2319998 / 0-20-2319998) +31-20-2319999 / 0031-20-2319999 (020-2319999 / 0-20-2319999)