 | NILSEN FLIS OG HÅNDVERKSERVICE AS | 920438504 | BODØ |
| NILSEN HARRY A | 970337954 | RANA |
| NILSEN MASKIN AS | 874433292 | VEGÅRSHEI |
| NILSEN & SOLBERG BYGGSERVICE AS | 913150848 | BERGEN |
| NILSEN & STURE BETONG AS | 986481729 | ASKØY |
| NILSEN VENTILASJON AS | 995234548 | ARENDAL |
| NILSEN VVS AS | 913509811 | ASKØY |
| NILS INGE TJELTA AS | 863233062 | SOLA |
| NILS JR FREY | 970326170 | KRISTIANSUND |
| NILS KALDAHL ANLEGG & TRANSPORT AS | 886833172 | NAMSOS |
| NILS LØFF AS | 983976956 | KONGSBERG |
| NILS OMA MASKIN AS | 920734170 | TIME |
| NILS REIME MASKIN AS | 987709111 | HÅ |
| NILSSON AS | 983494226 | BODØ |
| NILSSON HARAS AS | 919546646 | SORTLAND |
| NILSSON MO AS | 986444327 | RANA |
| NILS TORE AAMODT | 970156097 | HAMAR |
| NIMBUS GOTELE AS | 895204862 | OSLO |
| NINO RØRLEGGER AS | 923843175 | OSLO |
| NIPEDAL TAK OG MEMBRAN AS | 932481588 | VENNESLA |
| NITTEDAL RØRLEGGERBEDRIFT AS | 916998767 | LILLESTRØM |
| NIVAA AS | 835781372 | OSLO |
| NIVÅBYGG AS | 919290757 | LILLESTRØM |
| NJS BYGGSERVICE AS | 916538235 | RINGERIKE |
| NK ENTREPRENØR AS | 821095352 | OSLO |
| NL ARKITEKTUR AS | 931120174 | RINGERIKE |
| NLI ELEKTROSYSTEMER AS | 989042335 | TØNSBERG |
| NLI ENGINEERING AS | 887994722 | TØNSBERG |
| NMC RØRSERVICE AS | 933639711 | OSLO |
| NM RØR AS | 996798011 | OSLO |
| NMS EIENDOM BERGEN AS | 922179611 | BERGEN |
| NO ARKITEKTER AS | 935632625 | OSLO |
| NOA VVS AS | 915448941 | STORD |
| NOBERG ENTREPRENØR AS | 935338077 | ULLENSAKER |
| NOBI BYGG OG BETONG AS | 931491865 | VOSS |
| NO BYGG AS | 814968502 | SKIEN |
| NODDELAND BYGG | 984607245 | FROLAND |
| NODE RÅDGIVENDE INGENIØRER AS | 919853557 | BERGEN |
| NO DIG VESTFOLD AS | 921359721 | LARVIK |
| NOG ENTREPRENØR AS | 930512524 | VOLDA |
| NØKKEL-FERDIG DRIFT AS | 933592499 | HOLMESTRAND |
| NØKLAND BYGGSERVICE | 933617882 | LINDESNES |
| NØKLAND RØRLEGGERSERVICE AS | 915514758 | LYNGDAL |
| NOLA HUS AS | 998501288 | TRONDHEIM |
| NOMELAND MASKIN AS | 988044946 | VALLE |
| NOPEK ELEKTRO AS | 968958356 | LIER |
| NORACTOR AS | 930846589 | LILLESTRØM |
| NOR-ANDREW BYGG AS | 924542705 | MOSS |
| NORAVIND BYGG AS | 928823695 | ØYGARDEN |
| NORAX TYNSET AS | 984697082 | TYNSET |
| NORBECK ENTREPRENØR AS | 933455211 | OPPDAL |
| NORBYGG AS | 923728902 | SARPSBORG |
| NORBYGG TRONDHEIM AS | 920335772 | TRONDHEIM |
| NORCONSULT NORGE AS | 962392687 | BÆRUM |
| NORDAL BYGG AS | 936957781 | ALVER |
| NORDAL BYGGSERVICE AS | 917698953 | TØNSBERG |
| NORDAL MASKIN AS | 990800421 | LOM |
| NORDAN RUBICON AS | 971112298 | KLEPP |
| NORD ARKITEKTUR AS | 986692959 | BÆRUM |
| NORDÅS BETONGFORM AS | 917109524 | EIGERSUND |
| NORDASFALT AS | 950501480 | BODØ |
| NORDÅS TØMRERSERVICE AS | 922339090 | VEFSN |
| NORDAVIND ARKITEKTUR AS | 924489235 | TRONDHEIM |
| NORDBÆK BYGG AS | 820978382 | OSLO |
| NORDBALTIC AS | 935329167 | ÅLESUND |
| NORD-BERG AS | 959618267 | ULSTEIN |
| NORDBØ BYGG AS | 912792730 | STAVANGER |
| NORDBOHUS ASKER OG BÆRUM AS | 979222793 | ASKER |
| NORDBOHUS BYGGSERVICE AS | 838064132 | VERDAL |
| NORDBOHUS INNLANDET AS | 996600319 | GJØVIK |
| NORDBOHUS KONGSVINGER AS | 969041006 | KONGSVINGER |
| NORDBOHUS MODUM AS | 989717588 | MODUM |
| NORDBOHUS ROMERIKE AS | 921744099 | LILLESTRØM |
| NORDBOHUS SKIEN AS | 934541715 | SKIEN |
| NORDBOHUS SOGN AS | 982725216 | SOGNDAL |
| NORDBOHUS TG BYGG AS | 913459555 | TYSVÆR |
| NORDBØ MASKIN AS | 969042088 | ASKER |
| NORDBØ MASKIN AS | 912628930 | KVITSØY |
| NORDBØ OG SEGLEM AS | 966891483 | HAUGESUND |
| NORD BYGG & BETONG AS | 897153602 | PORSANGER |
| NORDBY MASKIN AS | 957804438 | NANNESTAD |
| NORDEC OY NUF | 922573972 | |
| NORDEN BYGGTJENESTE AS | 814108252 | STANGE |
| NORDENGEN AS | 931561537 | NANNESTAD |
| NORDFJORD HUS AS | 921174152 | STRYN |
| NORDFJORD TAKST CONSULTING AS | 813059282 | STAD |
| NORDFJORD VEGSERVICE AS | 998014166 | STAD |
| NORD-FUND AS | 932272199 | ÅFJORD |
| NORDHAUG MASKIN AS | 943812578 | SØRREISA |
| NORDHAVN BYGG AS | 980405648 | SARPSBORG |
| NORDHEIM VVS AS | 986426159 | ÅL |
| NORDHORDLAND GRUNN OG BETONG AS | 990193975 | ALVER |
| NORDIC BULK AS | 966950420 | SANDNES |
| NORDIC BYGGPARTNER AS | 925677531 | MOSS |
| NORDIC ENTREPRENØR AS | 926590464 | TRONDHEIM |
| NORDIC HEATSYSTEMS AS | 917506825 | KRISTIANSAND |
| NORDIC MRO AS | 812219162 | NORDRE FOLLO |
| NORDIC OFFICE OF ARCHITECTURE AS | 920013899 | OSLO |
| NORDIC SAFETY ENGINEERING AS | 925296236 | ASKER |
| NORDIC SPECIAL PROJECT AS | 929255372 | SARPSBORG |