| Business | Phone |
| Telecommunications Division 611 W Ottawa St, Lansing 48933 | (517) 373-0785 |
| Communications & Education Ofc 525 W Allegan St 6th, Lansing 48933 | (517) 241-7397 |
| Computing & Telecommunications 611 W Ottawa St, Lansing 48933 | (517) 241-2024 |
| Public Service Commission 6545 Mercantile Way 7, Lansing 48911 | (517) 241-6180 |
| Information Technology Sltns 320 S Walnut St, Lansing 48933 | (517) 373-8816 |