Area Code +31-33-(4400000...4400999) located in Amersfoort, Utrecht (UT), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 33 Subscriber Number From : 4400000 Subscriber Number To : 4400999 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 : InterConnect Services 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 : UT Region Name : Utrecht City : Amersfoort Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 52.1600 Longitude : 5.3900 ‹ previous : +31-33-(4340000...4349999) next › : +31-33-(4450000...4459999) Dialling Instructions For trunk calls: 0 33 4400000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 33 4400000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4400000 ~ 4400999 (Count: 1,000) Example: +31-33-4400000 / 0031-33-4400000 (033-4400000 / 0-33-4400000) +31-33-4400001 / 0031-33-4400001 (033-4400001 / 0-33-4400001) +31-33-4400002 / 0031-33-4400002 (033-4400002 / 0-33-4400002) +31-33-4400003 / 0031-33-4400003 (033-4400003 / 0-33-4400003) +31-33-4400004 / 0031-33-4400004 (033-4400004 / 0-33-4400004) ...+31-33-xxxxxxx / 0031-33-xxxxxxx (033-xxxxxxx / 0-33-xxxxxxx) ...+31-33-4400995 / 0031-33-4400995 (033-4400995 / 0-33-4400995) +31-33-4400996 / 0031-33-4400996 (033-4400996 / 0-33-4400996) +31-33-4400997 / 0031-33-4400997 (033-4400997 / 0-33-4400997) +31-33-4400998 / 0031-33-4400998 (033-4400998 / 0-33-4400998) +31-33-4400999 / 0031-33-4400999 (033-4400999 / 0-33-4400999)