 | NORD VEI & ASFALT AS | 930215996 | BALSFJORD |
| NORDVEST ELEKTRO DRIFT AS | 996901939 | VOLDA |
| NORDVEST MILJØ AS | 984070640 | ÅLESUND |
| NORDVEST MONTASJE AS | 930772925 | KINN |
| NORDWAY AS | 814460142 | NES |
| NORE BYGG AS | 981611535 | NORE OG UVDAL |
| NOREFJELLHYTTA AS | 880333402 | SIGDAL |
| NORE LAFT AS | 984106424 | NORE OG UVDAL |
| NOR-EL AS | 990574855 | TROMSØ |
| NOREL AS | 994952676 | OSLO |
| NORELCO AS ELEKTRO ENTREPRENØR | 947630261 | OSLO |
| NORELCO ELEKTRO AS | 985690960 | KARMØY |
| NORENBERG OLE MADS | 870124392 | LUSTER |
| NOREST BYGG AS | 999601413 | RINGSAKER |
| NORE VVS AS | 815075692 | OSLO |
| NORFAS AS | 926832158 | DRAMMEN |
| NORGE BYGG AS | 922741549 | BÆRUM |
| NORGESBYGG AS | 913541952 | FAUSKE |
| NORGESBYGG SØR AS | 996835804 | LINDESNES |
| NORGES ELEKTRO AS | 987767855 | TØNSBERG |
| NORGES GEOTEKNISKE INSTITUTT AS | 932089114 | OSLO |
| NORGESHUS AS | 948490412 | MELHUS |
| NORGESHUS AUSTEVOLL AS | 926952536 | AUSTEVOLL |
| NORGESHUS EGERSUND AS | 990016763 | EIGERSUND |
| NORGESHUS JR BYGG AS | 934138341 | HÅ |
| NORGESHUS MESTERBYGG SUNNHORDLAND AS | 997715926 | BØMLO |
| NORGESHUS NAUSTDAL BYGG AS | 958949383 | SUNNFJORD |
| NORGESHUS Ø-BYGG AS | 923347542 | HALDEN |
| NORGESHUS OPPDAL BYGG AS | 918320806 | OPPDAL |
| NORGESHUS RYFYLKE AS | 989324381 | STRAND |
| NORGESHUS STS AS | 927859971 | STJØRDAL |
| NORGES RØRLEGGERBEDRIFT AS | 993770000 | ENEBAKK |
| NORGES TAK & BLIKK AS | 832738662 | OSLO |
| NORGESTAK NORDLAND AS | 917454981 | RANA |
| NORGESTAK TRØNDELAG AS | 915320813 | VERDAL |
| NORGESTAK TRONDHEIM AS | 924513632 | VERDAL |
| NORGESTAK VEST AS | 833995642 | VERDAL |
| NORGES VASSDRAGS- OG ENERGIDIREKTORAT (NVE) | 970205039 | OSLO |
| NORGRAV AS | 924778377 | BÆRUM |
| NORHAGEN MUR AS | 913666712 | BÆRUM |
| NORHEAT AS | 917733953 | RINGSAKER |
| NORHEIMS HUS AS | 928569055 | MODUM |
| NORHEIMSUND ELEKTRO AS | 981187474 | KVAM |
| NORICKON SERVICE AS | 930594504 | OSLO |
| NORMA GEOSYSTEMS AS | 825831622 | ASKER |
| NORMAN BYGG AS | 999506771 | BERGEN |
| NORMANN ETEK AS | 920566065 | INDRE ØSTFOLD |
| NORM AS | 991131752 | RINGERIKE |
| NORNEBYGG AS | 927665875 | LYNGDAL |
| NORNES BETONG AS | 928724166 | VOSS |