The following Location Codes have been designated inactive due to lack of use and are no longer valid for use with the contest. They are provided here for historical reference and for retirees who may wish to petition for their re-activation.
| Code | Name |
|---|---|
| AT | Atlanta |
| BB | PLPM Transmission Equipment |
| CA | California Service Center |
| CE | Central Regional Center |
| CI | Cincinnati Service Center |
| CN | Connecticut Service Center |
| CQ | Dublin Natl Training Ctr |
| DA | Dallas Service Center |
| DQ | NY Comm Product Center |
| EA | Eastern Regional Center |
| HQ | Western Electric Headquarters |
| ID | Indiana Service Center |
| IL | AT&T Illinois Services |
| KA | Kansas City Service Center |
| LA | Southern California Service Ctr |
| MD | Morris Township Facility |
| MI | Miami Service Center |
| MN | Michigan Service Center |
| MP | Minneapolis Service Center |
| MR | Mountain NE Region |
| MS | Northwest Bell Inst |
| NA | Nashville Service Center |
| NE | Northeast Regional Center |
| NO | New Orleans Service Center |
| NR | New River Valley Works |
| OA | Omaha Works |
| PA | Pennsylvania Service Center |
| PC | Pacific Regional Center |
| PD | Oregon Service Center |
| PH | Phoenix Works |
| PX | Phoenix Works |
| QJ | C&P Telephone of Virginia |
| QK | Ameritech Services |
| RG | Richmond Works |
| SE | Idaho Service Center |
| SL | Salt Lake City Service Center |
| SN | San Leonardo Service Center |
| SP | Shreveport Works |
| SY | Syracuse Center |
| TT | Teletype Corp-Skokie |
| TY | Teletype Cork-Little Rock |
| VL | Vandenburg Labs |
| WA | Washington DC Service Center |
| WL | Winston-Salem Shops |
| WR | Winston-Salem-Bell Labs |