| Code Value | Definition |
|---|---|
| A | Port of Entry (POE) |
| B | BOP |
| C | REGIONAL SERVICE CENTER |
| D | District |
| E | Sector |
| F | FCO |
| G | Region |
| H | Hearing |
| I | Training |
| K | Deferred Inspections |
| M | Enforcement Support Activity |
| N | Non-Specific (for unknown agencies) |
| O | ORI |
| R | EOIR |
| S | Station |
| T | Docket Control Office |
| U | Sub-Office |
| V | Preinspections Office |
| W | ICE SAC Office |
| X | ICE Sub-Office (ASAC, AIRG, RAC, RA) |
| Z | Other |