 | ALVDAL GRAVESERVICE AS | 988414352 | ALVDAL |
| ALVDAL RØR AS | 918359303 | ALVDAL |
| ALVDAL TAKST AS | 893784292 | ALVDAL |
| ALVER ELEKTRO AS | 928901548 | ALVER |
| ALVER FLIS AS | 933176215 | ALVER |
| ALVERSUND MASKINSTASJON AS | 937664044 | ALVER |
| ALVØEN SERVICE AS | 918864741 | BERGEN |
| ÄLVSBYHUS NORGE AS | 975955885 | MOSS |
| A MARKUSSEN AS | 835000702 | NARVIK |
| AMBER BYGG AS | 927533146 | INDRE ØSTFOLD |
| AMBERG NORGE AS | 899162722 | LIER |
| AM BYGG AS | 989557580 | ÅFJORD |
| AM BYGG & INTERIØR AS | 919295678 | LILLESTRØM |
| AMDAHL STRØM & CAPPELEN ARKITEKTER AS | 974227932 | OSLO |
| AMDAL ELEKTRO AS | 982122996 | OVERHALLA |
| ÅMDAL MASKIN AS | 990059624 | ØRSTA |
| A-MEMBRAN AS | 998823951 | OSLO |
| ÅMLI BYGG AS | 989110233 | ÅMLI |
| ÅMLI MESTERBYGG AS | 911881594 | ÅMLI |
| AM-SERVICE AS | 921092598 | TRONDHEIM |
| AMTEDAL & HANSEN ARKITEKTKONTOR AS | 982193664 | KRISTIANSAND |
| AMUNDSEN BYGG AS | 928625788 | BAMBLE |
| AMUNDSEN RØR AS | 913018486 | BODØ |
| AMUNDSEN TAKST AS | 989658034 | ASKER |
| AMUND VOLEHAUGEN | 898811352 | NORDRE LAND |
| A. M. VIK AS | 977458412 | VANYLVEN |
| A NAGEL ALNE AS | 942265344 | VINDAFJORD |
| ANBUDSBYGG.NO DØNNESSEN | 996466485 | ULLENSAKER |
| AN BYGG AS | 997425103 | NANNESTAD |
| ANDÅS BYGG AS | 919441992 | KRISTIANSAND |
| ANDÅS RØR AS | 986085882 | KRISTIANSAND |
| ANDBERG-MOUM AS | 925342831 | OSLO |
| ANDENÆS VVS AS | 963031130 | OSLO |
| ANDERSEN BAD & BOLIG AS | 925193860 | OSLO |
| ANDERSEN & BAKKE ENTREPRENØRFORRETNING AS | 957875580 | FÆRDER |
| ANDERSEN BYGGTEKNISK KONSULENT | 933590046 | TRONDHEIM |
| ANDERSEN FONTANA AS | 848049182 | ASKER |
| ANDERSEN & KNOPH AS | 915987915 | SANDEFJORD |
| ANDERSEN & LJOSHEIM BYGG AS | 998737133 | BERGEN |
| ANDERSEN OG BERG CONSULT AS | 923398899 | HALDEN |
| ANDERSEN OG HOFSLUNDSENGEN BYGG AS | 980694437 | SOGNDAL |
| ANDERSEN OG LARSEN RØRLEGGERBEDRIFT AS | 915223907 | OSLO |
| ANDERSEN & SØNN RØRLEGGERFORRETNING AS | 942032846 | ASKØY |
| ANDERS & FRODE BYGG AS | 997655753 | TRYSIL |
| ANDERS JOHNSEN AS | 934195698 | OSLO |
| ANDERSLAND BYGG AS | 978659500 | TYSNES |
| ANDERS O GREVSTAD AS | 977052033 | BERGEN |
| ANDERSSEN LIV FREDRIKKE | 970120394 | BERGEN |
| ANDERS STIEN AS | 913350162 | OSLO |
| ANDØY INSTALLASJON AS | 930618802 | ANDØY |