| Business | Phone |
| Geological Oil & Gas Div 625 N 4th St, Baton Rouge 70802 | (225) 342-5523 |
| Health Standards 1801 N 4th St, Baton Rouge 70802 | (225) 342-9901 |
| Information Services 755 N 3rd St, Baton Rouge 70802 | (225) 342-4199 |
| Information Services Data Ctr 1800 N 3rd St, Baton Rouge 70802 | (225) 342-5165 |
| Information Systems 1051 N 3rd St, Baton Rouge 70802 | (225) 342-5393 |
| Public Safety Communications 7667 Independence Blvd, Baton Rouge 70806 | (225) 925-6003 |
| Public Service Commissioner 301 Main St, Baton Rouge 70801 | (225) 326-6000 |
| Telecommunications Dept 150 3rd St, Baton Rouge 70801 | (225) 342-6600 |
| Telecommunications Management 150 3rd St, Baton Rouge 70801 | (225) 342-1000 |
| Telecommunications Management 1801 N 3rd St, Baton Rouge 70802 | (225) 219-4860 |
| Statewide Information Systems 1201 N 3rd St 2-19, Baton Rouge 70802 | (225) 342-0900 |