Area Code +31-15-(7997000...7997999) 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 : 7997000 Subscriber Number To : 7997999 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 : OPTA 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-(7996000...7996999) next › : +31-15-(7998000...7998999) Dialling Instructions For trunk calls: 0 15 7997000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 15 7997000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7997000 ~ 7997999 (Count: 1,000) Example: +31-15-7997000 / 0031-15-7997000 (015-7997000 / 0-15-7997000) +31-15-7997001 / 0031-15-7997001 (015-7997001 / 0-15-7997001) +31-15-7997002 / 0031-15-7997002 (015-7997002 / 0-15-7997002) +31-15-7997003 / 0031-15-7997003 (015-7997003 / 0-15-7997003) +31-15-7997004 / 0031-15-7997004 (015-7997004 / 0-15-7997004) ...+31-15-xxxxxxx / 0031-15-xxxxxxx (015-xxxxxxx / 0-15-xxxxxxx) ...+31-15-7997995 / 0031-15-7997995 (015-7997995 / 0-15-7997995) +31-15-7997996 / 0031-15-7997996 (015-7997996 / 0-15-7997996) +31-15-7997997 / 0031-15-7997997 (015-7997997 / 0-15-7997997) +31-15-7997998 / 0031-15-7997998 (015-7997998 / 0-15-7997998) +31-15-7997999 / 0031-15-7997999 (015-7997999 / 0-15-7997999)