| Callsign | KR4MTK |
|---|---|
| Radio Service | HA - Amateur |
| License Status | A - Active |
| Grant Date | 2026-06-10 |
| Effective Date | 2026-06-22 |
| Expire Date | 2036-06-10 |
| Cancel Date | |
| Last Action Date | 2026-06-22 |
| End Date | 2036-06-10 |
| Available Date | 2038-06-11 |
| Applicant Type | I - Individual |
| Entity Name | Herrera, Mark R |
| Street Address / Locality | 4702 Tipton Ln Alexandria, VA 223102065 |
| County | Fairfax County |
| Zip Location | 38°47'04.8"N 77°07'19.9"W |
| Maidenhead | FM18ks |
| FRN | 0038494415 |
| Licensee ID/SGIN | L03052757 / 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 | 0012088127 |
| Phonetic weight / Morse weight | 12 / 64 |
Administrative History
| Action Date | Action Type |
|---|---|
| 2026-06-10 | SYSGRT - New Systematic Call Sign Assigned |
| 2026-06-10 | LIISS - License Issued |
| 2026-06-11 | LIAUA - Administrative Update Applied |
| 2026-06-22 | LIMOD - License Modified |