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| J.G TRANSPORT & ENTREPRENØR AS | 927447134 | GRAN |
| JH PROSJEKT AS | 823829582 | GRAN |
| JHS CONSTRUCTION AS | 990768617 | LARVIK |
| JIBO CONSULT JOHN INGVALD ØKLAND | 994820419 | BERGEN |
| JI BYGG AS | 971066571 | VESTBY |
| JIM HÅRE BYGGTJENESTER AS | 943512000 | SIGDAL |
| J JOHNSEN & SØNNER AS | 913206339 | STAVANGER |
| J&J RØR SERVICE AS | 931537695 | BÆRUM |
| JK ANLEGG AS | 916723091 | GJØVIK |
| JK.ARKITEKTUR AS | 988287644 | STORD |
| JK BYGG AS | 911824779 | HARSTAD |
| JK BYGGTEKNIKK AS | 913459288 | VERDAL |
| JK ENTREPRENØR AS | 925752401 | OSLO |
| J K PEDERSEN BYGG OG VEDLIKEHOLD | 891133502 | STAD |
| JKR JAN KIHM RØRMONTASJE AS | 945401532 | OSLO |
| J. KVALVÅGNES AS | 992551631 | SVEIO |
| JL HYTTEBYGGEREN AS | 998376394 | NESBYEN |
| JM ANLEGG AS | 818445962 | HUSTADVIKA |
| JM ANLEGGSERVICE AS | 926880012 | SULA |
| JMB PROSJEKT AS | 921336055 | ASKER |
| JM BYGG AS | 936116760 | ASKØY |
| JM FØRE AS | 928461904 | NARVIK |
| JMG BYGG AS | 935214130 | HÅ |
| JM HANSEN AS | 995306433 | TROMSØ |
| JM HANSEN MIDT AS | 992090006 | STEINKJER |
| JM JENSSEN MASKIN AS | 995198789 | SALANGEN |
| JMM BYGG AS | 923239693 | ALTA |
| JMS MASKIN AS | 954466132 | TROMSØ |
| JN RØRSERVICE AS | 998727855 | ASKER |
| JOAR BYGG AS | 926935364 | HÅ |
| JOB ARKITEKTER AS | 964500002 | STAVANGER |
| JODA AS | 915800424 | NORDRE FOLLO |
| JOHAN BREKKA ENTREPRENØRFIRMA AS | 951067660 | KRAGERØ |
| JOHAN EEK-LARSEN AS | 925786470 | BERGEN |
| JOHANNESSEN AS | 922636761 | TRONDHEIM |
| JOHANNESSEN OG HAGEN AS | 976203453 | TRONDHEIM |
| JOHANSEN BAD OG RØRSERVICE AS | 990718245 | OSLO |
| JOHANSEN BYGG & EIENDOM AS | 923143629 | FROGN |
| JOHANSEN MASKIN AS | 986016074 | HEMNES |
| JOHANSEN RØR AS | 926590588 | ETNE |
| JOHANSEN RØRLEGGERSERVICE AS | 997082680 | VESTVÅGØY |
| JOHANSEN RØR OG ANLEGG | 826793082 | STANGE |
| JOHANSEN VVS AS | 979212445 | OSLO |
| JOHANSSON BYGG SERVICE | 929508319 | BERGEN |
| JOHAN WESTLIE & SØNNER AS | 955663578 | MARKER |
| JOHN ANDREASSEN | 992957344 | HJARTDAL |
| JOHN DYRUD MASKIN | 977490863 | VESTRE TOTEN |
| JOHN FADUM AS | 911557622 | TØNSBERG |
| JOHN GALTEN AS | 983792324 | ÅMOT |
| JOHN GJERNES | 970554092 | RISØR |
| JOHN HAGEN AS | 915611133 | PORSGRUNN |
| JOHN HOLVIK AS | 978678882 | SUNNFJORD |
| JOHN JOHNSEN AS | 998131111 | ÅMOT |
| JOHN KILDAL & SØNNER AS | 886846142 | MELØY |
| JOHN KLEVELAND AS | 924536403 | SKIEN |
| JOHN LIEN RØRLEGGERBEDRIFT AS | 934092090 | RINGEBU |
| JOHN MAGNE RIKOLL TØMRERMESTER | 888625402 | GRAN |
| JOHN MARTINSEN BYGG AS | 981882288 | HADSEL |
| JOHNNY JENSEN AS | 941441769 | KRAGERØ |
| JOHNNY LARSEN AS | 974484684 | VEFSN |
| JOHN RUNAR MYDLAND | 922240345 | SOKNDAL |
| JOHN SAGMO AS | 982437636 | NAMSSKOGAN |
| JOHNSEN & ENGER BYGGSERVICE AS | 929150716 | ØVRE EIKER |
| JOHNSEN ENTREPRENØR AS | 994593161 | BÆRUM |
| JOHNSEN GLASS VINDUSFABRIKK AS | 985195455 | ØYGARDEN |
| JOHNSEN MASKIN | 930884758 | MELHUS |
| JOHNSEN RØRSERVICE AS | 918446370 | BERGEN |
| 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 |
| JOMÅS & BRINGSVERD AS | 832541222 | FROLAND |
| JOMEK SVEIS AS | 992256001 | GJERDRUM |
| J.O. MOEN AS | 980405419 | RAUMA |
| JON ARNE LANGØRGEN AS | 913561090 | TRONDHEIM |
| JON ARNE SEKSE | 914626765 | ULLENSVANG |
| JON AS | 971194456 | TRONDHEIM |
| JONAS ENGESETER | 916257635 | SOGNDAL |
| JONASSEN RØRSERVICE AS | 984223722 | HAMMERFEST |
| JONAS THOR AS | 929468880 | STAVANGER |
| JON DAHLE BYGG AS | 980285286 | GJERDRUM |
| JONDAL BYGG AS | 919913894 | ULLENSVANG |
| JONDAL MASKIN & TRANSPORT AS | 999562787 | ULLENSVANG |
| 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 TUVSJØEN AS | 992831855 | HOLE |
| JON SÆTER AS | 912531147 | KRISTIANSUND |