| Callsign | KR4MSM |
|---|---|
| Radio Service | HA - Amateur |
| License Status | A - Active |
| Grant Date | 2026-06-09 |
| Effective Date | 2026-08-10 |
| Expire Date | 2036-06-09 |
| Cancel Date | |
| Last Action Date | 2026-08-10 |
| End Date | 2036-06-09 |
| Available Date | 2038-06-10 |
| Applicant Type | I - Individual |
| Entity Name | Airhart, John W |
| Street Address / Locality | 420 Center St N Vienna, VA 221804109 |
| County | Fairfax County |
| Zip Location | 38°53'43.6"N 77°15'22.1"W |
| Maidenhead | FM18iv |
| FRN | 0038458543 |
| Licensee ID/SGIN | L03052753 / 000 |
| Licensee Class | G - General |
| Callsign Group | D - 2x3 |
| ULS/Geo Region | 4 / 4 / VA |
| Prev Callsign / Prev Class | T - Technician |
| Next Callsign | |
| Trustee Callsign / Trustee Name | |
| Vanity Type | |
| ULS File Number | 0012147195 |
| Phonetic weight / Morse weight | 12 / 64 |
Administrative History
| Action Date | Action Type |
|---|---|
| 2026-06-09 | SYSGRT - New Systematic Call Sign Assigned |
| 2026-06-09 | LIISS - License Issued |
| 2026-08-10 | LIMOD - License Modified |