| Code | Geographic Level |
|---|---|
| BG | Block Group |
| CBSA | Core Based Statistical Area |
| CO | County or equivalent |
| CT | Census Tract |
| DMAR | Designated Market Area Region (Nielsen TV Penetration Area) |
| MCD | Minor Civil Division |
| PL | Place |
| ST | State and District of Columbia |
| USA | United States |
| ZIP | ZIP Code |