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| 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 |
| JCDECAUX NORGE AS | 976555988 | OSLO |
| JCL BYGG AS | 911712504 | LIER |
| JE-BYGG AS | 928969053 | SANDEFJORD |
| JE HAFNOR AS | 989140531 | SANDNES |
| JEISTAD ENTREPRENØR AS | 920044956 | LILLEHAMMER |
| JELØY VVS AS | 917631735 | MOSS |
| JELSNES FLIS OG BAD AS | 918416714 | INDRE ØSTFOLD |
| JEMO ENTREPRENØR AS | 920246354 | SKIEN |
| JE NORDNES TRANSPORT AS | 925579521 | TRYSIL |
| JENS ARNE DELERUD | 899154592 | AURSKOG-HØLAND |
| JENSEN BLIKK OG VENTILASJON AS | 974212536 | LIER |
| JENSEN BYGG TEAM AS | 966572434 | RINGERIKE |
| JENSEN ELEKTRISKE AS | 950233486 | TROMSØ |
| JENSEN & HAMMERSBØEN AS | 823829582 | GRAN |
| JENSEN METALLINDUSTRI AS | 986333606 | BERGEN |
| JENSEN RØRSERVICE AS | 922099081 | JEVNAKER |
| JENSEN & SKODVIN ARKITEKTER AS | 927333244 | OSLO |
| JENSENS RØRLEGGERSERVICE AS | 914460859 | NORDRE FOLLO |
| JENSEN VVS AS | 993443808 | LØRENSKOG |
| JENS GERLACH SØRENSEN AS | 943650756 | TIME |
| JENSHUS MASKIN AS | 931758276 | RINGSAKER |
| JENS JOHAN OLSTAD | 969215136 | GJERDRUM |
| JENS PETTER ZETLITZ AS | 987662867 | TØNSBERG |
| JENSSEN ENTREPRENØR AS | 991521453 | NARVIK |
| JENS TANGEN BYGG OG VEDLIKEHOLD AS | 921669100 | ALSTAHAUG |
| JENS TREIDER SIVILARKITEKT MNAL | 970145214 | OSLO |
| JERNBETONG AS | 980835855 | MELHUS |
| JERSTAD VVS AS | 929395492 | KRISTIANSAND |
| JESS-BYGG AS | 912048039 | TYNSET |
| JESSEN RØR AS | 927345315 | HAMARØY |
| JESSHEIM RØRLEGGERBEDRIFT AS | 928520919 | ULLENSAKER |