Area Code +31-15-(7998000...7998999) 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 : 7998000 Subscriber Number To : 7998999 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-(7997000...7997999) next › : +31-15-(7999000...7999999) Dialling Instructions For trunk calls: 0 15 7998000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 15 7998000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7998000 ~ 7998999 (Count: 1,000) Example: +31-15-7998000 / 0031-15-7998000 (015-7998000 / 0-15-7998000) +31-15-7998001 / 0031-15-7998001 (015-7998001 / 0-15-7998001) +31-15-7998002 / 0031-15-7998002 (015-7998002 / 0-15-7998002) +31-15-7998003 / 0031-15-7998003 (015-7998003 / 0-15-7998003) +31-15-7998004 / 0031-15-7998004 (015-7998004 / 0-15-7998004) ...+31-15-xxxxxxx / 0031-15-xxxxxxx (015-xxxxxxx / 0-15-xxxxxxx) ...+31-15-7998995 / 0031-15-7998995 (015-7998995 / 0-15-7998995) +31-15-7998996 / 0031-15-7998996 (015-7998996 / 0-15-7998996) +31-15-7998997 / 0031-15-7998997 (015-7998997 / 0-15-7998997) +31-15-7998998 / 0031-15-7998998 (015-7998998 / 0-15-7998998) +31-15-7998999 / 0031-15-7998999 (015-7998999 / 0-15-7998999)