 | WS MASKIN & TRANSPORT AS | 984337647 | HARSTAD |
 | WSP NORGE AS | 881894742 | OSLO |
 | WWRØRLEGGER AS | 834137852 | ULLENSAKER |
 | WWW.KONSTRUKSJON.COM TØRSET | 987032758 | SKAUN |
 | WYX AS | 923809503 | MOSS |
 | X5 ELEKTRO AS | 979705883 | ALTA |
 | X BETONG AS | 912156494 | ÅLESUND |
 | XBO EIENDOMSUTVIKLING AS | 927716232 | STAVANGER |
 | XBYGG V/LUND | 919798262 | FARSUND |
 | XFORM AS | 992186909 | SUNNFJORD |
 | XK ENTREPRENØR AS | 995109409 | OSLO |
 | XL-BYGG MATHISEN & CO AS | 997645359 | ALTA |
 | XPERT INSTALLASJON AS | 981574036 | TØNSBERG |
 | XT BYGG OG DRIFT AS | 917859965 | PORSGRUNN |
 | XYLEM WATER SOLUTIONS NORGE AS | 918088067 | LILLESTRØM |
 | YC AMUNDRUD AS | 925552550 | ELVERUM |
 | YJ BYGG AS | 930871575 | ASKØY |
 | YM CONSULT AS | 823242832 | OSLO |
 | YMRO AS | 927210142 | OSLO |
 | YRAN & DAHLE ARKITEKTER AS | 926515608 | OSLO |
 | YR ARKITEKTER AS | 818946422 | BERGEN |
 | YSADESIGN AS | 853606162 | OSLO |
 | YSSEN AS | 898803902 | LILLESTRØM |
 | YTREDAL DIREKTE | 920698964 | SUNNFJORD |
 | YTRELAND AS | 933731855 | KARMØY |
 | YTTERDAHL AS | 929572912 | FARSUND |
 | YTTERLI MASKIN AS | 829513722 | RAUMA |
 | Z 1 STREK AS | 979574096 | NARVIK |
 | ZAZA TIMBER CONSTRUCTION | 826544902 | |
 | Z BYGG AS | 926177265 | LILLESTRØM |
 | ZEINER BOLIG HÅNDVERK AS | 948974487 | FÆRDER |
 | ZENITH ELEKTRO AS | 930349607 | SULA |
 | ZENTRA AS | 993077755 | BERGEN |
 | ZETHUS AS | 913941241 | ASKER |
 | ZIS AS | 914876877 | FREDRIKSTAD |
 | ZL BYGG AS | 924365935 | MELHUS |
 | ZM RØR AS | 998740533 | SURNADAL |