 | 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'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 |
| RØRFIX AS | 813034492 | NORDRE FOLLO |
| RØRFUNN AS | 974437589 | TRONDHEIM |
| RØR GRUPPEN AS | 924759593 | OSLO |
| RØRGUTTAN AS | 989567128 | VADSØ |
| RØRHEIM MASKIN AS | 961374235 | STAVANGER |
| RØRHJELP AS | 996740323 | NORDRE FOLLO |
| RØRHJELPEN AS | 915789978 | FREDRIKSTAD |
| RØRINOR AS | 999600034 | TROMSØ |
| RØR I SØR AS | 879688302 | KRISTIANSAND |
| RØRKOMPANIET AS | 981521439 | BERGEN |
| RØRKOMPANIET AS | 963328389 | ASKER |
| RØRKOMPANIET EFT. AS | 987132574 | MALVIK |
| RØRKUNNSKAP AS | 927246724 | LILLESTRØM |
| RØRLEGEN VVS AS | 926741853 | BERGEN |
| RØRLEGGAR HARALD STARHEIM | 965088512 | FJORD |
| RØRLEGGAR NILS TORGRIMSEN AS | 977355737 | VINDAFJORD |
| RØRLEGGER 123 AS | 927187086 | LILLESTRØM |
| RØRLEGGER 1 AS | 984072368 | TRONDHEIM |
| RØRLEGGER 1 KRISTIANSUND AS | 990514232 | KRISTIANSUND |
| RØRLEGGER 1 MOLDE AS | 812573942 | MOLDE |
| RØRLEGGER 1 OSLO AS | 996313212 | OSLO |
| RØRLEGGER 1 SUNNDALSRØR AS | 982156033 | SUNNDAL |
| RØRLEGGER 24 - 7 AS | 996923568 | OSLO |
| RØRLEGGER365 AS | 925947180 | VESTNES |
| RØRLEGGER ALF LARSEN AS | 981446313 | HAUGESUND |
| RØRLEGGERANE AS | 928010031 | HAUGESUND |
| RØRLEGGER ASGEIR HOLE AS | 927989751 | STRANDA |
| RØRLEGGER BERGAN AS | 928643026 | KONGSBERG |
| RØRLEGGER BERGEN AS | 999246079 | BERGEN |
| RØRLEGGER BERNTSEN AS | 960515978 | HAMMERFEST |