| Business | Phone |
| Us Faa 4215 Will Clayton Pkwy, Houston 77032 | (281) 209-8600 |
| Us Federal Aviation Adm 3838 N Sam Houston Pkwy E 510, Houston 77032 | (281) 372-6900 |
| Us Flight Standards District 12000 Aerospace Ave 400, Houston 77034 | (281) 929-7000 |
| Office Of Pipeline Safety 2320 La Branch St 2100, Houston 77004 | (713) 718-3746 |
| Transportation Dept 7721 Washington Ave, Houston 77007 | (713) 802-5000 |
| Railroad Commission 1706 Seamist Dr 501, Houston 77008 | (713) 869-5001 |
| Transportation Dept Mntnc 8301 Hempstead Rd, Houston 77008 | (713) 869-1985 |
| Transportation Dept 6810 Old Katy Rd, Houston 77024 | (713) 802-5321 |
| Transportation Dept 7303 Mesa Dr, Houston 77028 | (713) 636-7400 |
| Port Of Houston Auth Police 111 East Loop N, Houston 77029 | (713) 670-2400 |
| Us Transportation Dept 9640 Clinton Dr, Houston 77029 | (713) 671-5100 |
| Transportation Dept Mntnc 702 Fm 1959 Rd, Houston 77034 | (281) 464-5540 |
| Us Transportation Dept 1178 Ellington Fld, Houston 77034 | (281) 481-0025 |
| Us Transportation Dept 8902 Paul B Koonce St, Houston 77061 | (713) 644-5332 |
| Public Safety Dept 12220 S Gessner Dr, Houston 77071 | (713) 773-3334 |
| Transportation Dept 10000 Northwest Fwy 105, Houston 77092 | (713) 681-6637 |