 | ROLV EIDE AS | 988367060 | ØYGARDEN |
| ROLV SNARE AS | 932106817 | KONGSVINGER |
| 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 FASADE AS | 934186087 | GJERDRUM |
| 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 |
| RØNNING INDRELID AS | 956990726 | ØVRE EIKER |
| RONNY MOLDESTAD | 969938839 | KARMØY |
| RONNY'S MASKIN AS | 912212041 | HOL |
| RONNY TENNFJORD AS | 927892235 | ÅLESUND |
| RØN VVS AS | 979517130 | VESTRE SLIDRE |
| RØR 24 AS | 920851622 | ÅLESUND |
| RØR COMFORT AS | 974382687 | STAVANGER |
| RØRCOMPANIET AS | 989707833 | SARPSBORG |
| RØRCONSULT AS | 979645236 | OSLO |
| RØREKSPERT1 AS | 918336303 | TRONDHEIM |
| RØR EKSPERTEN AS | 929229681 | VENNESLA |
| RØREN OG KRISTIANSEN AS | 914822343 | DRAMMEN |
| RØRENTREPRENØR DAN BERG AS | 924664223 | ALTA |
| RØRENTREPRENØREN AS | 926708023 | OSLO |
| RØRFAG TROMSØ AS | 925076392 | TROMSØ |