Area Code +31-10-(4000000...4009999) located in Rotterdam, Zuid-Holland (ZH), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 10 Subscriber Number From : 4000000 Subscriber Number To : 4009999 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 : Rotterdam Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 51.9200 Longitude : 4.4700 ‹ previous : +31-10-(3700000...3709999) next › : +31-10-(4010000...4019999) Dialling Instructions For trunk calls: 0 10 4000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 10 4000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4000000 ~ 4009999 (Count: 10,000) Example: +31-10-4000000 / 0031-10-4000000 (010-4000000 / 0-10-4000000) +31-10-4000001 / 0031-10-4000001 (010-4000001 / 0-10-4000001) +31-10-4000002 / 0031-10-4000002 (010-4000002 / 0-10-4000002) +31-10-4000003 / 0031-10-4000003 (010-4000003 / 0-10-4000003) +31-10-4000004 / 0031-10-4000004 (010-4000004 / 0-10-4000004) ...+31-10-xxxxxxx / 0031-10-xxxxxxx (010-xxxxxxx / 0-10-xxxxxxx) ...+31-10-4009995 / 0031-10-4009995 (010-4009995 / 0-10-4009995) +31-10-4009996 / 0031-10-4009996 (010-4009996 / 0-10-4009996) +31-10-4009997 / 0031-10-4009997 (010-4009997 / 0-10-4009997) +31-10-4009998 / 0031-10-4009998 (010-4009998 / 0-10-4009998) +31-10-4009999 / 0031-10-4009999 (010-4009999 / 0-10-4009999)