 | TH BLIKK AS | 912783537 | RANA |
| TH BYGG AS | 933591220 | BRØNNØY |
| TH DØRA AS | 929306503 | DRAMMEN |
| THERMA INDUSTRI AS | 991863796 | OSLO |
| THERMA KULDE AS | 917216401 | OSLO |
| THERMAX AS | 984757514 | TØNSBERG |
| THERMICA AS | 997933273 | LIER |
| THERMO CONTROL AS | 979439334 | NORDRE FOLLO |
| THERMO CONTROL NORD AS | 846202552 | HARSTAD |
| THERWATT AS | 937099789 | SKIPTVET |
| THE WAGONSHED PROJECT AS | 928079325 | KONGSBERG |
| THINGBØ RØRSERVICE AS | 927410613 | SANDNES |
| THINGSTAD BJØRN | 971653493 | ÅMOT |
| THISGAARD BYGG AS | 935032458 | SANDEFJORD |
| TH. JOHANSEN & SØNNER AS | 935721652 | RINGSAKER |
| TH KOLBEINSEN INSTALLASJON AS | 976038266 | KARMØY |
| TH MASKIN AS | 998557976 | HEMSEDAL |
| THOEN MASKIN AS | 995352605 | ÅL |
| THØGERSEN BYGG OG DRIFT | 930694339 | AURSKOG-HØLAND |
| T HOLMEIDE & SØNNER AS ENTREPRENØRFORRETNING | 944229264 | LIER |
| THOMAS DALEN GRAVING & TRANSPORT AS | 937563248 | STRAND |
| THOMASSEN ARKITEKTKONTOR AS | 963092229 | OSLO |
| 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 |
| 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 |
| THOR GJUL AS | 989995332 | ØRLAND |
| THOR GUNDERSEN AS | 987147407 | HAMAR |
| THØRING & SØNNER AS | 933396347 | LESJA |
| THOR MAGNE HANSEN & SØNN AS | 985826617 | LYNGDAL |
| THORMODSÆTER ENTREPRENØR AS | 993578258 | KVINNHERAD |
| THORNSTRÖM BROOKFIELD ARKITEKTER AS | 929631897 | BERGEN |
| 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 |
| THOR WIKE & Co AS | 960957334 | HOLMESTRAND |
| TH.S.ENTREPRENØR AS | 923185844 | LILLESTRØM |
| THUNBERG ENTREPRENØR AS | 913827139 | LARVIK |
| 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 | ASKER |
| TINDE HYTTER AS | 985135282 | NORD-FRON |
| TINE SA | 947942638 | OSLO |
| TINGVOLL ELEKTRO AS | 977540771 | TINGVOLL |
| TINGVOLL RØR AS | 980866998 | TINGVOLL |
| TINNES-MORK MASKIN AS | 936083765 | HORTEN |
| TIPPETUE ARKITEKTER AS | 980043924 | BERGEN |
| TITAN BYGG AS | 921542887 | NORDKAPP |
| TIVETA AS | 998718724 | OSLO |
| TIVETA BETONG AS | 920756395 | OSLO |
| T-J BYGG AS | 927534363 | ALTA |
| TJENESTESERVICE AS | 919322519 | LIERNE |
| TJØME RØRSERVICE AS | 985471304 | FÆRDER |
| T.JØRGENSEN BYGG AS | 922851859 | GRIMSTAD |
| TK-BYGG AS | 920899994 | VANG |
| TK BYGGTEAM AS | 927608480 | ØVRE EIKER |
| TK ELEVATOR NORWAY AS | 828447742 | OSLO |
| TK HOME SOLUTIONS NV FILIAL NORGE NUF | 915103197 | OSLO |
| TK MASKINDRIFT AS | 916867433 | FREDRIKSTAD |
| TK RØRLEGGERSERVICE AS | 919854898 | SANDNES |
| TK RØRTEKNIKK AS | 997990897 | OSLO |
| TK RULLETRAPPER AS | 947218476 | OSLO |
| TKS BYGG AS | 971077921 | SANDEFJORD |
| TKS HEIS AS | 978681239 | HÅ |
| TKT INNEKLIMA AS | 923792333 | PORSGRUNN |
| TL BOLIG AS | 921955723 | INDRE ØSTFOLD |
| T.L BYGG AS | 919059044 | HAMAR |
| T LEER BYGGSERVICE AS | 919999977 | SIGDAL |
| TL MASKIN AS | 993642193 | NORDRE LAND |
| TLS ELEKTRO AS | 920416721 | LIER |
| TMA BYGG AS | 927181622 | RÅDE |
| TM ANLEGGSERVICE AS | 928990907 | ALTA |
| TM BETONG AS | 991654887 | DRANGEDAL |
| TM BYGGSERVICE AS | 926311158 | SANDNES |
| TM BYGGSYSTEM AS | 928067572 | FREDRIKSTAD |
| TM BYGGTEK AS | 913071409 | GJESDAL |
| TMC BYGG AS | 918852166 | LILLESTRØM |
| TM NORD BYGG AS | 829566192 | KVÆFJORD |
| T.M. RØR AS | 890451462 | OSLO |
| TMT GRUPPEN AS | 936418090 | NORDRE FOLLO |
| T N SERVICE AS | 927870932 | BERGEN |
| TN VARMETEKNIKK AS | 918646663 | INDRE ØSTFOLD |
| TOBB BYGGDRIFT AS | 985171076 | TRONDHEIM |
| TOC AS | 996672840 | KRISTIANSAND |
| TØCKSFORS RØRTJENESTE T ANDERSSON | 935079446 | INDRE ØSTFOLD |
| TOFIRE AS | 987363738 | KRISTIANSAND |