| Business | Phone |
| Hooker County Extension Office Mullen 69152 | (308) 546-2310 |
| Hooker County Fair Board Mullen 69152 | (308) 546-2657 |
| Hooker County Historical Annex Mullen 69152 | (308) 546-2323 |
| Hooker County Roads Dept S Highway 97, Mullen 69152 | (308) 546-2730 |