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| JOHN'S MUR OG GRAVESERVICE AS | 983779247 | NES |
| JOHNSON CONTROLS NORWAY AS | 940729092 | OSLO |
| JOHNSRUD ANLEGGSDRIFT AS | 993946206 | DRAMMEN |
| JOHS E ØVSTHUS AS | 979502486 | VOSS |
| JOHS J SYLTERN AS | 816510872 | ÅFJORD |
| JOHS. RØGELSTAD MASKIN AS | 990337896 | ETNE |
| JOHS SÆLEN & SØNN AS | 856409252 | BJØRNAFJORDEN |
| JOKERHUS BYGG AS | 974988577 | STAVANGER |
| JØLLE & KRISTENSEN AS | 916872860 | TRONDHEIM |
| JØLSTAD MASKIN AS | 929228251 | NESODDEN |
| JØLSTER BETONGBYGG AS | 981902467 | SUNNFJORD |
| JØLSTER BYGG OG INTERIØR AS | 933532496 | SUNNFJORD |
| JOMEK SVEIS AS | 992256001 | GJERDRUM |
| J.O. MOEN ANLEGG AS | 981240839 | RAUMA |
| JONARK AS | 992618590 | NAMSOS |
| JON ARNE LANGØRGEN AS | 913561090 | TRONDHEIM |
| JON ARNE SEKSE | 914626765 | ULLENSVANG |
| JON AS | 971194456 | TRONDHEIM |
| JONAS ENGESETER | 916257635 | SOGNDAL |
| JONASSEN RØRSERVICE AS | 984223722 | HAMMERFEST |
| JON DAHLE BYGG AS | 980285286 | GJERDRUM |
| JONDAL BYGG AS | 919913894 | ULLENSVANG |
| JONDAL MASKIN & TRANSPORT AS | 999562787 | ULLENSVANG |
| JON ERIK MEDALEN | 971507594 | SIGDAL |
| JONES ARKITEKTER AS | 943567042 | BÆRUM |
| JON HAUGLAND BYGG AS | 925795097 | ASKER |
| JON HILLESTAD | 855078392 | SOGNDAL |
| JØNHOLT GRAVESERVICE V/ROY JØNHO | 969964023 | PORSGRUNN |
| JON L SÆTER AS | 974495929 | SUNNDAL |
| JONNY LARSEN RØRLEGGERBEDRIFT AS | 980169421 | DRAMMEN |
| JONNY LILLESTRØM AS | 885271022 | GJERDRUM |
| JON SÆTER AS | 912531147 | KRISTIANSUND |
| JØNSBERG VENTILASJON AS | 914974127 | SALTDAL |
| JON'S BYGG OG TAKST AS | 924324309 | LOM |
| JON STRAND AS | 984867212 | SØR-FRON |
| JON TORE SAND AS | 819154082 | ASKER |
| JOP BYGG AS | 830466142 | ALTA |
| JORA MASKIN AS | 981888057 | DOVRE |
| JORDALEN ENTREPRENØR AS | 975930017 | VOSS |
| JORDALEN MASKIN AS | 895454532 | VOSS |
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| JØRN GARVIK | 994279750 | SANDNES |
| JØRN KONRAD BYE AS | 998014867 | KRØDSHERAD |
| JØRN NIKOLAISEN | 996784754 | HAMAR |