Area Code +31-521-(370000...379999) located in Steenwijk, Drenthe (DR), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 521 Subscriber Number From : 370000 Subscriber Number To : 379999 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 : DR Region Name : Drenthe City : Steenwijk Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.7900 Longitude : 6.1200 ‹ previous : +31-521-(360000...369999) next › : +31-521-(380000...389999) Dialling Instructions For trunk calls: 0 521 370000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 521 370000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 370000 ~ 379999 (Count: 10,000) Example: +31-521-370000 / 0031-521-370000 (0521-370000 / 0-521-370000) +31-521-370001 / 0031-521-370001 (0521-370001 / 0-521-370001) +31-521-370002 / 0031-521-370002 (0521-370002 / 0-521-370002) +31-521-370003 / 0031-521-370003 (0521-370003 / 0-521-370003) +31-521-370004 / 0031-521-370004 (0521-370004 / 0-521-370004) ...+31-521-xxxxxx / 0031-521-xxxxxx (0521-xxxxxx / 0-521-xxxxxx) ...+31-521-379995 / 0031-521-379995 (0521-379995 / 0-521-379995) +31-521-379996 / 0031-521-379996 (0521-379996 / 0-521-379996) +31-521-379997 / 0031-521-379997 (0521-379997 / 0-521-379997) +31-521-379998 / 0031-521-379998 (0521-379998 / 0-521-379998) +31-521-379999 / 0031-521-379999 (0521-379999 / 0-521-379999)