Area Code +31-15-(7400000...7400999) located in Delft, Zuid-Holland (ZH), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 15 Subscriber Number From : 7400000 Subscriber Number To : 7400999 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 : I4IP 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 : Delft Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.0100 Longitude : 4.3600 ‹ previous : +31-15-(7370000...7379999) next › : +31-15-(7440000...7440999) Dialling Instructions For trunk calls: 0 15 7400000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 15 7400000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7400000 ~ 7400999 (Count: 1,000) Example: +31-15-7400000 / 0031-15-7400000 (015-7400000 / 0-15-7400000) +31-15-7400001 / 0031-15-7400001 (015-7400001 / 0-15-7400001) +31-15-7400002 / 0031-15-7400002 (015-7400002 / 0-15-7400002) +31-15-7400003 / 0031-15-7400003 (015-7400003 / 0-15-7400003) +31-15-7400004 / 0031-15-7400004 (015-7400004 / 0-15-7400004) ...+31-15-xxxxxxx / 0031-15-xxxxxxx (015-xxxxxxx / 0-15-xxxxxxx) ...+31-15-7400995 / 0031-15-7400995 (015-7400995 / 0-15-7400995) +31-15-7400996 / 0031-15-7400996 (015-7400996 / 0-15-7400996) +31-15-7400997 / 0031-15-7400997 (015-7400997 / 0-15-7400997) +31-15-7400998 / 0031-15-7400998 (015-7400998 / 0-15-7400998) +31-15-7400999 / 0031-15-7400999 (015-7400999 / 0-15-7400999)