| Business | Phone |
| Communications Workers-America 408 Hemphill St, Hattiesburg 39401 | (601) 582-7861 |
| Ibew 5405 U S Highway 49, Hattiesburg 39401 | (601) 544-3700 |
| Ibew 990 Hardy St, Hattiesburg 39401 | (601) 543-0861 |
| Teamsters Local Union 606 W 7th St, Hattiesburg 39401 | (601) 582-9310 |