Area Code +31-10-(8440000...8449999) 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 : 8440000 Subscriber Number To : 8449999 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 : UPC Nederland 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-(8430000...8439999) next › : +31-10-(8450000...8459999) Dialling Instructions For trunk calls: 0 10 8440000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 10 8440000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 8440000 ~ 8449999 (Count: 10,000) Example: +31-10-8440000 / 0031-10-8440000 (010-8440000 / 0-10-8440000) +31-10-8440001 / 0031-10-8440001 (010-8440001 / 0-10-8440001) +31-10-8440002 / 0031-10-8440002 (010-8440002 / 0-10-8440002) +31-10-8440003 / 0031-10-8440003 (010-8440003 / 0-10-8440003) +31-10-8440004 / 0031-10-8440004 (010-8440004 / 0-10-8440004) ...+31-10-xxxxxxx / 0031-10-xxxxxxx (010-xxxxxxx / 0-10-xxxxxxx) ...+31-10-8449995 / 0031-10-8449995 (010-8449995 / 0-10-8449995) +31-10-8449996 / 0031-10-8449996 (010-8449996 / 0-10-8449996) +31-10-8449997 / 0031-10-8449997 (010-8449997 / 0-10-8449997) +31-10-8449998 / 0031-10-8449998 (010-8449998 / 0-10-8449998) +31-10-8449999 / 0031-10-8449999 (010-8449999 / 0-10-8449999)