 | THOMASSEN BYGG AS | 991281959 | SALANGEN |
| THOMASSEN RØR AS | 818952872 | LILLESAND |
| THON & CO AS | 935062691 | MODUM |
| THON MASKIN AS | 925389269 | NORD-AURDAL |
| THORALF MYHRE AS | 917871167 | SANDNES |
| THORBJØRNSEN RØR AS | 929066014 | NORDRE FOLLO |
| THORE KNUTSEN MASKIN OG TRANSPORT AS | 991327495 | TYSVÆR |
| THORE LUNDHAGEN GRAVING/TRANSPORT | 992240911 | LILLESTRØM |
| THORE MAGNUSSEN OG SØNN AS | 975950824 | VESTVÅGØY |
| THORENDAHL AS | 963265433 | OSLO |
| THOR ENGINEERING AS | 914464676 | ÅSNES |
| THORGERSEN BYGG OG BETONG | 988084883 | KARMØY |
| THOR GJUL AS | 989995332 | ØRLAND |
| THOR HARTVIG LUNDE | 989503693 | TVEDESTRAND |
| THOR HÅVARD TORP GRAVING & TRANSPORT | 970938699 | FREDRIKSTAD |
| THØRING & SØNNER AS | 933396347 | LESJA |
| THOR MAGNE HANSEN & SØNN AS | 985826617 | LYNGDAL |
| THORMODSÆTER ENTREPRENØR AS | 993578258 | KVINNHERAD |
| THOR MYRVANG GRAVEFIRMA AS | 919798726 | RINGERIKE |
| THORNSTRÖM BROOKFIELD ARKITEKTER AS | 929631897 | BERGEN |
| THORP INGE | 970020136 | BÆRUM |
| THORSEN & MARCUSSEN AS | 944225633 | FÆRDER |
| THORSHAUG RØR AS | 931032399 | LILLESTRØM |
| THORSNES BYGG TB AS | 926940791 | OSLO |
| THOR STEINAR BYGGTJENESTER AS | 979713126 | STAVANGER |
| THORSTEINSEN ENTREPRENØR AS | 816119812 | BERGEN |
| THORVALD HANSEN AS | 895877972 | GRIMSTAD |
| THORVALDSEN OG HARLEM RØR AS | 930841757 | FREDRIKSTAD |
| THOR WIKE & Co AS | 960957334 | HOLMESTRAND |
| TH.S.ENTREPRENØR AS | 923185844 | LILLESTRØM |
| THUNBERG ENTREPRENØR AS | 913827139 | LARVIK |
| THUVE'N ANLEGG & BANE AS | 913714377 | STANGE |
| THV AS | 997448227 | HÆGEBOSTAD |
| T. I. LARSEN RØRLEGGER AS | 991445404 | KRISTIANSAND |
| TILLER-VIMEK AS | 980043959 | SØR-FRON |
| TILSETH AS | 979579330 | VOLDA |
| TIMBERBYGG AS | 922577021 | TRONDHEIM |
| TIME ALUMINIUM AS | 986482229 | SANDNES |
| TIME ELEKTRO AS | 960016785 | TIME |
| TIND1 AS | 989892991 | BÆRUM |
| TINDE HYTTER AS | 985135282 | NORD-FRON |
| TINE SA | 947942638 | OSLO |
| TINGVOLL ELEKTRO AS | 977540771 | TINGVOLL |
| TINGVOLL RØR AS | 980866998 | TINGVOLL |
| TINNES-MORK MASKIN | 945777834 | HORTEN |
| TINNOSET BYGG OG LAFT AS | 992849339 | NOTODDEN |
| TIPPETUE ARKITEKTER AS | 980043924 | BERGEN |
| TITAN BYGG AS | 921542887 | NORDKAPP |
| TIVETA AS | 998718724 | OSLO |
| TIVETA BETONG AS | 920756395 | OSLO |