03803 is the ZIP Code for The Air National Guard in Portsmouth, New Hampshire. 03803 is entirely within Rockingham County. Regionally, it is located in the Southern New Hampshire Region.
| ZIP Code Name | Portsmouth |
| Organization | The Air National Guard |
| Primary County | Rockingham County |
| ZIP Code Type | Unique |
| Current Time | EDT |
| Coordinates | 43.08955002,-70.81704712 |
| Adjacent ZIP Codes | |
| Region | Southern New Hampshire Region |
| Metropolitan/Micropolitan Stat Area | Boston-Cambridge-Newton, MA-NH |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |