 | 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 |
| JANS BYGGESERVICE & SØNN AS | 914724759 | MOSS |
| 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 |
| JAN TORE TØNNESSEN | 925629812 | BJERKREIM |
| JAR ANLEGG AS | 992451440 | HOLMESTRAND |
| JARLE BJØRNERUD AS | 919293012 | NORDRE LAND |
| JARLE NES | 812222112 | VINDAFJORD |
| JARLE NORDJORDET | 979557175 | VINJE |
| JARLE SÆTRA AS | 981440528 | KONGSBERG |
| JARL INGE HAUKÅS | 970063072 | HUSTADVIKA |
| JARLSBERG BYGG AS | 923708707 | TØNSBERG |
| JARO AS | 976241053 | ALTA |
| J.A.RØRSERVICE AS | 912258408 | NORDRE FOLLO |
| JAROTECH AS | 989161083 | ASKER |
| JAR RØRTEKNIKK AS | 914750970 | BÆRUM |
| JAR-TEK RØR AS | 941173675 | BÆRUM |
| JASS BYGG AS | 925111147 | LILLESTRØM |
| JÅSUND BYGG | 955196848 | SOLA |
| JATBYGG AS | 920709206 | KRISTIANSAND |
| JATEC AS | 960853687 | HAUGESUND |
| JATRE AS | 945735406 | HUSTADVIKA |
| JAVA ENTREPRENØR AS | 979687699 | OSLO |
| JB5 BYGG AS | 928923290 | IVELAND |
| J BARLIEN TRANSPORT AS | 920634060 | OVERHALLA |
| JB BYGG AS | 989769707 | SØR-VARANGER |
| JB ELEKTRO AS | 999027903 | NORDREISA |
| J. B KRISTIANSEN AS | 929086740 | NES |
| JBM AS | 826529032 | NANNESTAD |
| JBS INNEKLIMA AS | 921425945 | STAVANGER |
| JBYGG AS | 922632030 | DRAMMEN |