 | CSP AS | 914539552 | ALTA |
| CS VARME OG ENERGI TEKNIKK AS | 897175622 | BÆRUM |
| CURVE STUDIO AS | 928603180 | FÆRDER |
| CV SERVICE AS | 929637275 | NORDRE FOLLO |
| CW RØR AS | 825346392 | NITTEDAL |
| CZECH PRO TEAM AS | 913259122 | OSLO |
| DABYGG AS | 921360371 | ELVERUM |
| DACO MEKANISKE AS | 983643566 | SOGNDAL |
| DAFRO AS | 990118124 | SKAUN |
| DAGALI BIL & MASKIN Lars Aasberg | 870966512 | HOL |
| DAGALI VVS AS | 998396506 | HOL |
| DAG ARNE NILSEN AVD. KONGSBERG AS | 895595012 | KONGSBERG |
| DAGESTAD MEKANISKE VERKSTED AS | 970975969 | RINGSAKER |
| DAGFINN OLSEN AS | 984829515 | GJØVIK |
| DAGFIN SKAAR AS | 982310482 | KRISTIANSAND |
| DAGS MASKIN AS | 950429992 | SYKKYLVEN |
| DAHLE BLIKK AS | 976081684 | TRONDHEIM |
| DAHLE MASKIN AS | 926403591 | STRAND |
| DAHLE MEK. VERKSTED AS | 989461346 | BERGEN |
| DAHLEN OPPMÅLING AS | 930671029 | RINGSAKER |
| DAHLEN VVS AS | 923875778 | LEVANGER |
| DAHLE RØRSERVICE AS | 996872181 | INDRE FOSEN |
| DAHL & JENSEN BYGG AS | 918330844 | NITTEDAL |
| 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 & VVS 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 |