Area Code +31-15-(7830000...7839999) 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 : 7830000 Subscriber Number To : 7839999 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 : VoipZeker 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-(7820000...7829999) next › : +31-15-(7850000...7859999) Dialling Instructions For trunk calls: 0 15 7830000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 15 7830000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7830000 ~ 7839999 (Count: 10,000) Example: +31-15-7830000 / 0031-15-7830000 (015-7830000 / 0-15-7830000) +31-15-7830001 / 0031-15-7830001 (015-7830001 / 0-15-7830001) +31-15-7830002 / 0031-15-7830002 (015-7830002 / 0-15-7830002) +31-15-7830003 / 0031-15-7830003 (015-7830003 / 0-15-7830003) +31-15-7830004 / 0031-15-7830004 (015-7830004 / 0-15-7830004) ...+31-15-xxxxxxx / 0031-15-xxxxxxx (015-xxxxxxx / 0-15-xxxxxxx) ...+31-15-7839995 / 0031-15-7839995 (015-7839995 / 0-15-7839995) +31-15-7839996 / 0031-15-7839996 (015-7839996 / 0-15-7839996) +31-15-7839997 / 0031-15-7839997 (015-7839997 / 0-15-7839997) +31-15-7839998 / 0031-15-7839998 (015-7839998 / 0-15-7839998) +31-15-7839999 / 0031-15-7839999 (015-7839999 / 0-15-7839999)