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| FIRESAFE AS | 958249799 | LØRENSKOG |
| FIRING & THORSEN AS | 986237356 | HORTEN |
| FISKAA MASKIN AS | 991347852 | VANYLVEN |
| FISKÅ MASKIN AS | 992711418 | STRAND |
| FISKEBECK HANDVERK AS | 980440044 | SØR-VARANGER |
| FISKVIK ENTREPRENØR AS | 912126293 | TYNSET |
| FIVE ELEKTRO AS | 971227435 | DRAMMEN |
| FIX RØR AS | 999551416 | NORDRE FOLLO |
| FJÆREKILEN ENTREPRENØR AS | 927980991 | SKIEN |
| FJÆRLI BYGG AS | 919263784 | VESTNES |
| FJELDÅSHEIM & NILSEN AS | 911922347 | OSLO |
| FJELD HÅNDVERK AS | 822674682 | AURSKOG-HØLAND |
| FJELDHEIM ANLEGG AS | 914385776 | KONGSBERG |
| FJELDHEIM ENTREPRENØR AS | 927362635 | MODUM |
| FJELDHØI BYGG AS | 919345543 | HALDEN |
| FJELDSETH AS | 939351191 | TRONDHEIM |
| FJELLBORG ENTREPRENØR AS | 917992924 | LYNGDAL |
| FJELL-BYGG AS | 989143700 | ØYSTRE SLIDRE |
| FJELLE OG DAHLE AS | 993561932 | FREDRIKSTAD |
| FJELLESTAD & HEGGLAND AS | 883638972 | KRISTIANSAND |
| FJELL & GRUNNTEKNIKK AS | 926848399 | ÅFJORD |
| FJELLHAMAR BYGG AS | 997990676 | LØRENSKOG |
| FJELLHEIM DRIFT OG SERVICE AS | 912672662 | NAMSOS |
| FJELLHEIM-MASKIN AS | 913988027 | SANDNES |
| FJELLIA AS | 920151507 | AURSKOG-HØLAND |
| FJELLKNATT ARKITEKTSTUDIO AS | 919419776 | SENJA |
| FJELL- OG ANLEGGSTEKNIKK AS | 927459701 | HORTEN |
| FJELL OG MASKIN AS | 987965991 | BODØ |
| FJELLSKAR BYGG AS | 917616817 | HOLMESTRAND |
| FJELL-SUPPORT AS | 929706021 | RANA |
| FJOGSTAD-HUS AS | 983815308 | SANDNES |
| FJORD ANLEGG AS | 921215037 | SANDEFJORD |
| FJORD BASE AS | 939535977 | KINN |
| FJORDEN ELEKTRO AS | 921342047 | SANDEFJORD |
| FJORDEN RØRLEGGERSERVICE AS | 930048151 | SANDEFJORD |
| FJORDEN VVS AS | 999161995 | HVALER |
| FJORD INGENIØRER AS | 912716694 | SØR-VARANGER |
| FJORDPIPE AS | 992137266 | KINN |
| F JØRGENSEN AS | 952183729 | HALDEN |
| FJØSSYSTEMER BYGG AS | 975807371 | RINGEBU |
| FJOTLAND ENTREPRENØR AS | 930702668 | SANDNES |
| FK BYGG AS | 990767564 | SANDEFJORD |
| FKD AS | 988725722 | DRAMMEN |
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| FLAA VVS AS | 987256117 | KRISTIANSAND |
| FLAGE MASKIN AS | 983389627 | VOSS |
| FLAGET AS | 994496166 | ØVRE EIKER |