 | ROGNLI BYGG AS | 918617973 | HVALER |
| ROGNSTAD BYGGTEKNIKK AS | 913139763 | ULLENSAKER |
| ROGNSTAD VVS AS | 979938217 | HURDAL |
| ROGSTAD & ODDEN AS | 919695803 | FOLLDAL |
| ROHA AS | 933880818 | ASKER |
| ROJO ARKITEKTER AS | 951770930 | TRONDHEIM |
| RØKENES AS | 966550015 | ALTA |
| R O LARSEN MASKIN AS | 998431735 | TØNSBERG |
| ROLF ANDREASSEN AS | 865473362 | FREDRIKSTAD |
| ROLF B. MOBERG CAND.PHILOL./ARCHITECT WITH LICENSE IN NORWAY. ACCORDIONIMPORT. | 929105702 | BERGEN |
| Rolf Døli A/S | 946943967 | SØR-ODAL |
| ROLF GROHS AS | 916076770 | SKIEN |
| ROLF KRISTIANSEN | 955216849 | FROGN |
| ROLF LEVORSEN AS | 879637732 | NORE OG UVDAL |
| ROLF OG RONNY MASKIN AS | 981439821 | TRYSIL |
| ROLF OLAV KNUTSEN | 991009647 | FROLAND |
| ROLFS GRAVING OG PLANERING AS | 927886278 | SKIEN |
| ROLV EIDE AS | 988367060 | ØYGARDEN |
| ROLVSØY BYGG AS | 995698323 | SARPSBORG |
| ROMARHEIM ENTREPRENØR AS | 997050789 | ALVER |
| ROMERIKE ANLEGGSDRIFT AS | 964460469 | ULLENSAKER |
| ROMERIKE BAD AS | 999198570 | ULLENSAKER |
| ROMERIKE ELEKTRO AS | 976494881 | ULLENSAKER |
| ROMERIKE GEOTEKNIKK AS | 926732617 | LILLESTRØM |
| ROMERIKE GRAVING OG TRANSPORT V/PER-CHRISTIAN AAS | 969098865 | ULLENSAKER |
| ROMERIKE HUS AS | 891141092 | RÆLINGEN |
| ROMERIKE MASKIN AS | 985479569 | NES |
| ROMERIKE OPPMÅLING AS | 979376499 | LILLESTRØM |
| ROMERIKE PIPE SERVICE AS | 920248772 | NANNESTAD |
| ROMERIKE PROFILTEKNIKK AS | 971163364 | LILLESTRØM |
| ROMERIKE RØRLEGGERBEDRIFT AS | 990122792 | ULLENSAKER |
| ROMERIKE TAK OG MEMBRAN AS | 931710346 | GJERDRUM |
| ROMRISS AS | 921283555 | BERGEN |
| ROMSDAL ANLEGG AS | 924086866 | MOLDE |
| ROMSDAL MASKIN AS | 991897321 | MOLDE |
| ROMSLY AS | 930687391 | AURSKOG-HØLAND |
| ROM SPRINKLER AS | 916567367 | SKIEN |
| RØNAAS ENTREPRENØR AS | 920976077 | NES |
| RONDANE ENTREPRENØR AS | 988850306 | SØR-FRON |
| RONDANE OPPMÅLING AS | 922256640 | SEL |
| RONGVE BYGG | 981889770 | VOSS |
| RONGVE OG FYLLING ELEKTRO AS | 994034529 | ÅLESUND |
| RØNNESTAD & BJØRSVIK AS | 979487754 | BERGEN |
| RØNNING ANLEGG AS | 889255722 | VESTBY |
| RØNNING ANLEGGSTJENESTER | 970386858 | ORKLAND |
| RØNNING ELEKTRO AS | 915581714 | STAVANGER |
| RØNNINGEN BYGGTJENESTER AS | 925773840 | NORDRE LAND |
| RØNNINGEN KJELL VICTOR | 970300600 | ELVERUM |
| RØNNINGEN MASKIN AS | 988132020 | NES |
| RØNNING ENTREPRENØR AS | 992046996 | ASKER |