| ASKER TAKSTFIRMA AS | 989041592 | ASKER |
| ASKER TØMRERMESTERBEDRIFT AS | 920649718 | ASKER |
| ASKESTAD-AAS ELEKTRO AS | 981975731 | ASKER |
| ASKIM ENTREPRENØR AS | 976115295 | INDRE ØSTFOLD |
| ASKIM LANTTO ARKITEKTER MNAL AS | 980442047 | OSLO |
| ASKIM MEKANISKE VERKSTED AS | 993298255 | INDRE ØSTFOLD |
| ASKIM & MYSEN RØR AS | 980236226 | INDRE ØSTFOLD |
| ÅS KOMMUNE | 964948798 | ÅS |
| AS KONGSVINGER RØRLEGGERSERVICE | 963915411 | KONGSVINGER |
| ASKØY-BERGEN ELEKTRO AS | 857884922 | ASKØY |
| ASKØY RØRSERVICE AS | 925901520 | ASKØY |
| ASKØY TØMRERSERVICE AS | 920485367 | ASKØY |
| ASKVIK BYGGTJENESTER AS | 915977561 | SANDNES |
| ASKVOLL TRANSPORT OG ENTREPENØRSERVISE Sissel Mjåseth | 992583274 | ASKVOLL |
| ASK VVS AS | 828660152 | NORDRE FOLLO |
| AS LINNES | 941870600 | OSLO |
| AS LØTEN ELEKTRO | 929316606 | HAMAR |
| AS MAJETIC RØR OG BYGG | 913318439 | LIER |
| ASMALØY BYGG AS | 914827191 | HVALER |
| ÅSMUND PETTERSEN & SØNN AS | 916881029 | JEVNAKER |
| AS NORSAND | 924590300 | STAD |
| AS NYMO | 914853052 | GRIMSTAD |
| AS OSCAR SUNDQUIST | 916425023 | SØR-VARANGER |
| ASPÅS MASKIN AS | 930598372 | VERDAL |
| A/S Pettersson & Gjellesvik's Elektriske Installasjonsforretning. | 915211631 | BERGEN |
| ASPIRA AS | 916718969 | OSLO |
| ASPLAN VIAK AS | 910209205 | BÆRUM |
| AS REALBYGG | 950525932 | OSLO |
| AS REIERSEN VVS | 929189175 | KRISTIANSAND |
| AS RØRLEGGER | 939353224 | TRONDHEIM |
| AS RØRLEGGER | 815589602 | OSLO |
| ÅS RØRLEGGERBEDRIFT AS | 947941755 | ÅS |
| AS RØYSELAND MASKIN | 915232663 | LYNGDAL |
| AS RYFYLKE TRELAST | 915536999 | STRAND |
| ASSEMBLIN AS | 965808752 | DRAMMEN |
| ASSEMBLIN VENTILASJON AS | 965123385 | DRAMMEN |
| ÅSSIDEN RØR AS | 980419258 | DRAMMEN |
| AS SØREIDE VVS | 963930194 | VOSS |
| A/S SørMek | 947038400 | LINDESNES |
| AS STAFF & SØNNER | 916176333 | ØSTRE TOTEN |
| A/STAB AS | 984548648 | BERGEN |
| ASTAD ARKITEKTUR AS | 920575307 | OSLO |
| AS TOFT MESTERRØR | 917037809 | ØYGARDEN |
| ASTRA BYGG & ENTREPRENØR AS | 978712967 | STEINKJER |
| ASTRAKOM AS | 980507653 | BÆRUM |
| A SVELA MASKIN AS | 919993626 | TIME |
| AS WATT | 958862431 | BÆRUM |
| ASW BYGG AS | 916747772 | BERGEN |
| ATAM AS | 929578171 | OSLO |
| A. TANGEN AS | 926704834 | RINGERIKE |