Area Code +31-23-(2051000...2051999) located in Haarlem, Noord-Holland (NH), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 23 Subscriber Number From : 2051000 Subscriber Number To : 2051999 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 : Motto Voip 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 : NH Region Name : Noord-Holland City : Haarlem Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.3800 Longitude : 4.6400 ‹ previous : +31-23-(2050000...2050999) next › : +31-23-(2060000...2069999) Dialling Instructions For trunk calls: 0 23 2051000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 23 2051000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2051000 ~ 2051999 (Count: 1,000) Example: +31-23-2051000 / 0031-23-2051000 (023-2051000 / 0-23-2051000) +31-23-2051001 / 0031-23-2051001 (023-2051001 / 0-23-2051001) +31-23-2051002 / 0031-23-2051002 (023-2051002 / 0-23-2051002) +31-23-2051003 / 0031-23-2051003 (023-2051003 / 0-23-2051003) +31-23-2051004 / 0031-23-2051004 (023-2051004 / 0-23-2051004) ...+31-23-xxxxxxx / 0031-23-xxxxxxx (023-xxxxxxx / 0-23-xxxxxxx) ...+31-23-2051995 / 0031-23-2051995 (023-2051995 / 0-23-2051995) +31-23-2051996 / 0031-23-2051996 (023-2051996 / 0-23-2051996) +31-23-2051997 / 0031-23-2051997 (023-2051997 / 0-23-2051997) +31-23-2051998 / 0031-23-2051998 (023-2051998 / 0-23-2051998) +31-23-2051999 / 0031-23-2051999 (023-2051999 / 0-23-2051999)