| ALASKA | 37AK | BIG MOUNTAIN |
| ARKANSAS | 37T | CALICO ROCK-IZARD CO |
| MISSOURI | 37M | HORNERSVILLE MEM |
| MONTANA | 37S | FORT PECK |
| NEBRASKA | 37V | ARAPAHOE MUNI |
| NORTH DAKOTA | 37N | RIVERDALE GARRISON DAM RECREATIONAL AIRPARK |
| OHIO | 37I | TROY SKYPARK |
| OKLAHOMA | 37K | BURNEYVILLE FALCONHEAD |
| TEXAS | 37F | MUNDAY MUNI |
| TEXAS | 37X | WALLER SKYDIVE HOUSTON |