Area Code +31-523-(230000...239999) located in Hardenberg, Overijssel (OV), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 523 Subscriber Number From : 230000 Subscriber Number To : 239999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : KPN 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 : OV Region Name : Overijssel City : Hardenberg Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.5800 Longitude : 6.6200 ‹ previous : +31-523-(210000...219999) next › : +31-523-(240000...249999) Dialling Instructions For trunk calls: 0 523 230000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 523 230000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 230000 ~ 239999 (Count: 10,000) Example: +31-523-230000 / 0031-523-230000 (0523-230000 / 0-523-230000) +31-523-230001 / 0031-523-230001 (0523-230001 / 0-523-230001) +31-523-230002 / 0031-523-230002 (0523-230002 / 0-523-230002) +31-523-230003 / 0031-523-230003 (0523-230003 / 0-523-230003) +31-523-230004 / 0031-523-230004 (0523-230004 / 0-523-230004) ...+31-523-xxxxxx / 0031-523-xxxxxx (0523-xxxxxx / 0-523-xxxxxx) ...+31-523-239995 / 0031-523-239995 (0523-239995 / 0-523-239995) +31-523-239996 / 0031-523-239996 (0523-239996 / 0-523-239996) +31-523-239997 / 0031-523-239997 (0523-239997 / 0-523-239997) +31-523-239998 / 0031-523-239998 (0523-239998 / 0-523-239998) +31-523-239999 / 0031-523-239999 (0523-239999 / 0-523-239999)