 | JADARHUS BYGG AS | 991478442 | STAVANGER |
| JÆGER BRUDVIK ARKITEKTER AS | 920379664 | OSLO |
| JÆR-BYGG AS | 925350281 | TIME |
| JÆRCONSULT AS | 889958022 | TIME |
| JÆREN GRAVESERVICE AS | 916524927 | KLEPP |
| JÆRENTREPRENØR ANLEGG AS | 930022837 | HÅ |
| JÆRENTREPRENØR AS | 995817969 | HÅ |
| JÆRHUS Livar Mauland | 969083981 | TIME |
| JÆRMESTER AS | 979541902 | HÅ |
| JÆRPROSJEKT AS | 931710036 | SANDNES |
| JÆRTAKST AS | 997695798 | TIME |
| JÆR TRE AS | 917118167 | HÅ |
| JAGLASS AS | 918975101 | FREDRIKSTAD |
| JAHN BRÅTVEIT | 994285084 | LYNGDAL |
| JAHR TRANSPORT AS | 976500997 | NANNESTAD |
| JAKHELLN ENTREPRENØR AS | 977199190 | LILLESTRØM |
| JAKOB EIMHJELLEN | 977265312 | GLOPPEN |
| JAKOBSEN RØR AS | 913341686 | LINDESNES |
| JAKSA TØMRER & BAD AS | 927167956 | LILLESTRØM |
| J.A LARSEN RØRLEGGERSERVICE | 921889267 | VESTBY |
| JAMO ENTREPRENØR AS | 920053572 | EIDSVOLL |
| JAMTVEIT ENTREPRENØR AS | 930186309 | NOTODDEN |
| JAN ANDERSEN & SØNN AS BYGG OG TØMRERMESTER | 961499429 | HALDEN |
| JAN ANDERS HANSEN | 881322862 | INDRE ØSTFOLD |
| Jan Bauck Arkitektkontor A/S | 945847085 | OSLO |
| JAN DYBEDAL HANSEN | 970322531 | INDRE ØSTFOLD |
| JAN EDVARDSEN AS | 937867956 | SARPSBORG |
| JAN EIVIND ELLEFSEN | 865024312 | TØNSBERG |
| JAN E LARSEN AS | 920974074 | FLEKKEFJORD |
| JAN ERIK BRENNE AS | 913099745 | BÆRUM |
| JAN ERIK HAGELUND AS | 989560913 | RINGSAKER |
| JAN ERIK JOHNSRUD AS | 988037648 | BÆRUM |
| JAN-ERIK OLSEN KJØKKEN OG GLASS AS | 910824368 | PORSGRUNN |
| JAN HASLESTAD GRAVING & TRANSPORT AS | 977058422 | TØNSBERG |
| JAN HAUGEN AS | 880476262 | DOVRE |
| JAN HVAMBSAL AS | 939210709 | KONGSBERG |
| JAN HYSTAD | 970382097 | RAKKESTAD |
| JAN I BYGG AS | 926826034 | EIDSVOLL |
| JAN INGE HØYDAL AS | 911879239 | SOGNDAL |
| JAN KÅRE EIDE | 987130083 | FJORD |
| JAN MILJE MASKIN AS | 917206627 | TYSVÆR |
| JAN NOVAK | 970322442 | INDRE ØSTFOLD |
| JAN OG JO ELEKTRO AS | 982699185 | OSLO |
| JAN OLE VATNE | 987139749 | IVELAND |
| JAN ØVSTEBØ | 986961798 | KVINNHERAD |
| JAN-ROGER BIRKELUND AS | 892320632 | TØNSBERG |
| JANSEN FRERIKSEN VVS TEKNIKK AS | 998151724 | DRANGEDAL |
| JANS HAGESERVICE AS | 950169354 | BERGEN |
| JAN TERJE BERLANDSTVEIT | 970390987 | BJØRNAFJORDEN |
| JAN TORE TØMTE TRANSPORT OG GRAVING AS | 911762242 | HURDAL |