The US Air Force followed the YH-21 order with an order for 38 H-21As [51-1523..15269 and 52-8487..8492]. The last six H-21As were delivered to the Royal Canadian Air Force. 
List of Operators of H-21A |
| Years | Model | Org | |
|---|---|---|---|
| 1952/74 | H-21 |  US Air Force | |
| 1955- | H-21 |  Royal Canadian Air Force (1945-1968) |
Global Distribution of H-21A |
|
Construction Numbers |
| C/N | Year | History | ||
|---|---|---|---|---|
| 12 | 51-15249,N9719Z | |||
| 31 | 52-8488,9611 | |||
