Area Code +31-15-(7810000...7810999) 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 : 7810000 Subscriber Number To : 7810999 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 : KeenSystems 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-(7800000...7809999) next › : +31-15-(7820000...7829999) Dialling Instructions For trunk calls: 0 15 7810000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 15 7810000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7810000 ~ 7810999 (Count: 1,000) Example: +31-15-7810000 / 0031-15-7810000 (015-7810000 / 0-15-7810000) +31-15-7810001 / 0031-15-7810001 (015-7810001 / 0-15-7810001) +31-15-7810002 / 0031-15-7810002 (015-7810002 / 0-15-7810002) +31-15-7810003 / 0031-15-7810003 (015-7810003 / 0-15-7810003) +31-15-7810004 / 0031-15-7810004 (015-7810004 / 0-15-7810004) ...+31-15-xxxxxxx / 0031-15-xxxxxxx (015-xxxxxxx / 0-15-xxxxxxx) ...+31-15-7810995 / 0031-15-7810995 (015-7810995 / 0-15-7810995) +31-15-7810996 / 0031-15-7810996 (015-7810996 / 0-15-7810996) +31-15-7810997 / 0031-15-7810997 (015-7810997 / 0-15-7810997) +31-15-7810998 / 0031-15-7810998 (015-7810998 / 0-15-7810998) +31-15-7810999 / 0031-15-7810999 (015-7810999 / 0-15-7810999)