 | ARNE NILSEN BYGGESERVICE AS | 814334252 | FÆRDER |
| ARNE NYHEIM RØRLEGGERSERVICE AS | 879956242 | GAUSDAL |
| Arne Olav Lund A/S | 914004330 | LARVIK |
| ARNE OLSBAKK TRANSPORT AS | 979532679 | STOR-ELVDAL |
| ARNE PETTERSEN AS | 919165847 | TANA |
| Arne Rød & CO AS | 919700572 | SANDEFJORD |
| ARNESEN FRØHAUG BETONGENTREPRENØR AS | 997319907 | BÆRUM |
| ARNESEN RØR AS | 996726436 | ALTA |
| ARNESTAD FLIS | 995894025 | SULA |
| ARNE STORRUSTE | 976620461 | SØR-AURDAL |
| ARNE TØRÅSEN AS | 981413172 | TRYSIL |
| ARNE VISTAD VÅGSLID | 988344125 | TOKKE |
| ARNFINN FJUKSTAD | 969184419 | NÆRØYSUND |
| ARNSTEIN STOREBRAATEN | 969146304 | GOL |
| ARNTSEN BYGG AS | 928052257 | SANDEFJORD |
| ARNT SERIGSTAD MASKIN AS | 995652404 | TIME |
| ARNT-VIDAR JENSEN | 976146093 | BALSFJORD |
| AROS ARKITEKTER AS | 999655114 | SANDNES |
| ARR ARKITEKTER AS | 919816260 | RINGSAKER |
| ARRO ELEKTRO AS | 979538480 | DRAMMEN |
| ÅRSETH ELEKTRO AS | 948109298 | BERGEN |
| ÅRSLAND MASKIN AS | 889884452 | HÅ |
| ÅRSTAD BYGG AS | 987542691 | BERGEN |
| ART ARKITEKTER OG INGENIØRER AS | 840324532 | ÅLESUND |
| ART-BYGG OG ANLEGG AS | 921666659 | SARPSBORG |
| ARTEC AS | 841756142 | BERGEN |
| ARTHUR J THORSEN AS | 916733224 | BERGEN |
| ARTIC BYGGTEKNIKK JAN NIKOLAI PEDERSEN | 971021853 | HAMMERFEST |
| ARTIKON AS | 922217424 | SULA |
| ARTTECH ENTREPRENØR AS | 918371818 | RINGSAKER |
| ARUNAS AS | 997378636 | EIDSVOLL |
| ARVE EIDE AS | 999639240 | ØRLAND |
| ARVE FRAFJORD GRAVING OG TRANSPORT | 942354533 | SOLA |
| ARVE GRINDHEIM ENTREPRENØR AS | 898269752 | AURLAND |
| ARVE HAGEN AS | 998491487 | RINGSAKER |
| ARVE KJÆRLAND GRAVING/SPRENGING | 970051813 | KVINNHERAD |
| ARVE MATHIAS AARØEN | 969631008 | STRYN |
| ARVESEN BYGG AS | 915931456 | SKIEN |
| ARVE SKREDE | 970339140 | STRYN |
| ARVE STÅLE OLSEN AS | 946832359 | LARVIK |
| ARVID ELLINGSEN AS | 996012174 | LINDESNES |
| ARVID HANSTAD AS | 929706706 | STANGE |
| ARVID THOMASSEN GRAVESERVICE AS | 923544682 | ALTA |
| ARW ENTREPRENØR AS | 913150325 | TRONDHEIM |
| ASAK ANLEGG AS | 939947914 | LILLESTRØM |
| ÅSANE BYGGMESTERFORRETNING AS | 962116663 | BERGEN |
| ÅSANE RØRLEGGERSERVICE AS | 916643950 | BERGEN |
| ÅSANE TEKNISKE GRUPPE RØR AS | 927435632 | BERGEN |
| ÅSANE VENTILASJON AS | 813592592 | BERGEN |
| ASAP RØRSERVICE AS | 912273911 | BÆRUM |