| Business | Phone |
| Transportation Dept 1049 E Northwest Hwy, Des Plaines 60016 | (847) 296-5991 |
| Us Flight Standards 2300 E Devon Ave, Des Plaines 60018 | (847) 294-7252 |
| Us Maritime Adm 2860 S River Rd 185, Des Plaines 60018 | (847) 298-4535 |
| Us Faa 333 E Touhy Ave, Des Plaines 60018 | (847) 824-3866 |
| Us Transportation Dept 2300 E Devon Ave, Des Plaines 60018 | (847) 294-8600 |