 | DAHLEN VVS AS | 923875778 | LEVANGER |
| DAHLE RØRSERVICE AS | 996872181 | INDRE FOSEN |
| DAHL & JENSEN BYGG AS | 918330844 | NITTEDAL |
| DAHLMAN ANLEGG OG BORING AS | 933498204 | HOLMESTRAND |
| DAHLMANN BYGGTEKNIKK | 912282627 | ØVRE EIKER |
| DAHL-SUNDAL INGENIØRTJENESTER AS | 998182824 | ØVRE EIKER |
| DAKARK AS | 976598407 | GISKE |
| DAK & INGENIØRTJENESTER AS | 998902134 | ASKER |
| DAKS AS | 989524682 | SOLA |
| DALANE ANLEGGSERVICE AS | 890779832 | EIGERSUND |
| DALBU BYGG AS | 932314517 | BERGEN |
| DALE ANLEGG AS | 913849493 | SKIEN |
| DALE ANLEGGSGARTNER AS | 811810622 | HARSTAD |
| DALE MASKIN AS | 986724265 | OPPDAL |
| DALE MASKIN OG UTLEIGE AS | 995302101 | ALVER |
| DALEN KRISTOFFER | 970302360 | FITJAR |
| DALEN RØR AS | 923107363 | TOKKE |
| DALE RØR AS | 974527413 | SUNNFJORD |
| DALSBYGDA GRAVESERVICE ANS | 988707813 | OS (INNLANDET) |
| DALSEGG RØRLEGGERSERVICE AS | 912155420 | TYNSET |
| DAMI AS | 998031605 | ASKER |
| DAMMYR BYGG AS | 990927200 | FREDRIKSTAD |
| DAMSGÅRD BRANNSIKRING AS | 919334495 | BERGEN |
| DAN BLIKK AS | 968850601 | OSLO |
| DANIEL JAKOBSEN MASKIN AS | 919638036 | ALTA |
| DANIEL PLURA SNEKKERSERVICE AS | 823131542 | HITRA |
| DANIELSEN OG MURIQI BYGG AS | 927172259 | KRISTIANSAND |
| DANOR ELEKTRO AS | 982891523 | OSLO |
| DARAK DESIGN Dag Wirak | 951438707 | GRIMSTAD |
| DARK ARKITEKTER AS | 913659023 | OSLO |
| DARK BERGEN AS | 924729686 | BERGEN |
| DARK FREDRIKSTAD AS | 916322925 | FREDRIKSTAD |
| DARK MATTER AS | 915855849 | LØRENSKOG |
| DARK STAVANGER AS | 921629559 | STAVANGER |
| DATEK INSTALLASJON AS | 916110529 | OSLO |
| DATELCO AS | 968366076 | OSLO |
| DAVID ANDERSEN | 970429409 | HOLMESTRAND |
| DAVID BYGG AS | 975966844 | ASKER |
| DAVIK ALLSERVICE v/Bjørn Forsberg | 988664030 | BREMANGER |
| DAVMAR SERVICES AS | 929265513 | SANDEFJORD |
| DAVOR KNEZEVIC | 989292145 | SKAUN |
| DAXARO ARKITEKTUR AS | 925580910 | KONGSBERG |
| DBB AS | 930564788 | HAUGESUND |
| DB BYGG AS | 920254179 | INDRE ØSTFOLD |
| DBYGG AS | 911839768 | LUNNER |
| DC BYGG SERVICE AS | 929405196 | ØYER |
| DE BYGG AS | 927033747 | HAMMERFEST |
| DECO NORGE AS | 916204078 | MOSKENES |
| DE ELEKTRO AS | 989119621 | OSLO |
| DEGERUD TØMRERSERVICE AS | 997817982 | NESODDEN |