 | FREDRIKSTAD VENTILASJONS- OG BLIKKENSLAGERFORRETNING AS | 911829614 | FREDRIKSTAD |
| FREKHAUG BYGG AS | 928050963 | BERGEN |
| FREMI V/ FRODE FREMMERLID | 912166805 | ÅLESUND |
| FREMST AS | 922941653 | DRAMMEN |
| FREMTIDENS FUNDAMENT AS | 930208361 | AURSKOG-HØLAND |
| FRENCH TOUCH Piombino | 987952563 | SANDEFJORD |
| FRESVIK PRODUKT AS | 922582270 | VIK |
| FRETLAND BYGG AS | 941511732 | LÆRDAL |
| FRIER BYGGSERVICE AS | 919910666 | BAMBLE |
| FRIGAARD ENTREPRENØR AS | 929576462 | SARPSBORG |
| FRIIS ARKITEKTER AS | 979906986 | NORE OG UVDAL |
| FRISTAD ELEKTRO AS | 957892752 | FJALER |
| FRISTED ARKITEKTER AS | 998403804 | ASKER |
| FRISVOLL ANLEGG | 919938714 | RAUMA |
| FRITT SPENN AS | 933698076 | SELBU |
| FRODE BRING | 981059492 | NORD-AURDAL |
| FRODE GRANDETRØ AS | 996836061 | SKAUN |
| FRODE HALBERG AS | 998576318 | ELVERUM |
| FRODE JOHANSEN AS | 922711291 | ØRLAND |
| FRODE SUNDSBY | 970967397 | AURE |
| FRØILAND BYGG AS | 984042426 | STAVANGER |
| FROLAND BYGGESERVICE AS | 933321584 | FROLAND |
| FRON BYGG AS | 922624461 | NORD-FRON |
| FRONTA AS | 897768232 | STORD |
| FRONTA BYGG AS | 923144919 | STORD |
| FRONT BYGG ROGALAND AS | 925702498 | SANDNES |
| FRONT ELEKTRO AS | 917442932 | NORDRE FOLLO |
| FRONT ENTREPRENØR AS | 980049159 | OSLO |
| FRØSLID MASKIN AS | 933216497 | NORDRE LAND |
| FROSTAD MASKIN OG TRANSPORT AS | 930161667 | ÅLESUND |
| FROSTA MASKINSERVICE AS | 992737832 | FROSTA |
| FROST ARKITEKTER AS | 914016762 | OSLO |
| FROSTA VVS AS | 992358815 | FROSTA |
| FROSTH INGENIØRER AS | 948333562 | MÅLSELV |
| FRØYLAND ELEKTRO AS | 968989847 | HAUGESUND |
| FRUSTØL AS | 935665264 | KRISTIANSAND |
| FRYA GRUSTAK AS | 927451867 | RINGEBU |
| FRYA STAV & LAFT AS | 814586782 | SØR-FRON |
| FRYDENLUND VVS AS | 983482007 | HOL |
| FS MUR AS | 915622690 | KRISTIANSAND |
| FS PROSJEKT Frode Skrindsrud | 996452662 | ØYSTRE SLIDRE |
| FT-BYGG AS | 916450044 | KRISTIANSAND |
| FT KLIMA AS | 825140832 | SANDEFJORD |
| FT MASKIN AS | 826335122 | KLEPP |
| FUGLESANGDAHL AS | 991836330 | STEINKJER |
| FUGLESTEG AS | 817464912 | LUSTER |
| FUHR BYGG AS | 998885353 | LUSTER |
| FULL-BYGGEKONTROLL AS | 828650262 | ORKLAND |
| FULSAAS MASKIN AS | 831224762 | ROLLAG |
| FUNDAMENTERING AS | 979838336 | TRONDHEIM |