| 1-320th Field Artillery Regiment | Commander | 798-9024 | |
| 1-320th Field Artillery Regiment | Executive Officer | 412-4201 | |
| 1-320th Field Artillery Regiment | Command Sergeant Major | 798-7050 | |
| 1-320th Field Artillery Regiment | FRSA | 412-3558 | |
| 1-320th Field Artillery Regiment | S1 Officer/ NCOIC | 798-7487/412-8231 | |
| 1-320th Field Artillery Regiment | S2/ NCOIC | 412-4937/4188 | |
| 1-320th Field Artillery Regiment | S3 Officer | 412-4194 | |
| 1-320th Field Artillery Regiment | Asst S3 | 412-4183 | |
| 1-320th Field Artillery Regiment | S4 NCOIC | 798-9415 | |
| 1-320th Field Artillery Regiment | S6 NCOIC | 798-2969 | |
| 1-320th Field Artillery Regiment | Frago/ Chemo/ Radar/ DTMS | 412-4178 | |
| 1-320th Field Artillery Regiment | Land/ Ammo | 412-4184 | |
| 1-320th Field Artillery Regiment | Schools | 412-4181 | |
| 1-320th Field Artillery Regiment | MEDO | 798--5423 | |
| 1-320th Field Artillery Regiment | BN Chaplain | 798-5641 | |
| 1-320th Field Artillery Regiment | HHB Commander | 412-9035 | |
| 1-320th Field Artillery Regiment | HHB First Sergeant | 798-9061 | |
| 1-320th Field Artillery Regiment | HHB Training | 412-3436 | |
| 1-320th Field Artillery Regiment | HHB Supply/Arms Room | 798-7721 | |
| 1-320th Field Artillery Regiment | A\1-320 Commander | 412-4505 | |
| 1-320th Field Artillery Regiment | A\1-320 First Sergeant | 412-4505 | |
| 1-320th Field Artillery Regiment | A\1-320 Executive Officer | 412-4506 | |
| 1-320th Field Artillery Regiment | A\1-320 Supply/ Arms Room | 412-4789 | |
| 1-320th Field Artillery Regiment | A\1-320 Training | 412-4455 | |
| 1-320th Field Artillery Regiment | B\1-320 Commander | 412-8755 | |
| 1-320th Field Artillery Regiment | B\1-320 First Sergeant | 412-8754 | |
| 1-320th Field Artillery Regiment | B\1-320 Executive Officer | 412-8756 | |
| 1-320th Field Artillery Regiment | B\1-320 Training | 412-4455 | |
| 1-320th Field Artillery Regiment | B\1-320 Supply/Arms Room | 412-5480 | |
| 1-320th Field Artillery Regiment | G\1-320 Commander | 798-4921 | |
| 1-320th Field Artillery Regiment | G\1-320 Executive Officer | 412-4162 | |
| 1-320th Field Artillery Regiment | G\1-320 First Sergeant | 412-4133 | |
| 1-320th Field Artillery Regiment | G/1-320 BTN Notor SGT/ Dispatcher/ Training Room | 412-6189 | |