| Callsign | KO4YDO |
|---|---|
| Radio Service | HA - Amateur |
| License Status | A - Active |
| Grant Date | 2022-02-28 |
| Effective Date | 2026-09-21 |
| Expire Date | 2032-02-28 |
| Cancel Date | |
| Last Action Date | 2026-09-21 |
| End Date | 2032-02-28 |
| Available Date | 2034-03-01 |
| Applicant Type | I - Individual |
| Entity Name | Vander Bloomen, Mark J |
| Street Address / Locality | 805 Monroe St SW Apt 641 Huntsville, AL 35801 |
| County | Madison County |
| Zip Location | 34°43'31.0"N 86°33'39.1"W |
| Maidenhead | EM64rr |
| FRN | 0031815970 |
| Licensee ID/SGIN | L02531274 / 000 |
| Licensee Class | G - General |
| Callsign Group | D - 2x3 |
| ULS/Geo Region | 4 / 4 / AL |
| Prev Callsign / Prev Class | T - Technician |
| Next Callsign | |
| Trustee Callsign / Trustee Name | |
| Vanity Type | |
| ULS File Number | 0012191498 |
| Phonetic weight / Morse weight | 12 / 80 |
Administrative History
| Action Date | Action Type |
|---|---|
| 2022-02-28 | SYSGRT - New Systematic Call Sign Assigned |
| 2022-02-28 | LIISS - License Issued |
| 2024-02-24 | LIAUA - Administrative Update Applied |
| 2024-02-24 | LIAUA - Administrative Update Applied |
| 2025-09-27 | LIAUA - Administrative Update Applied |
| 2026-09-21 | LIMOD - License Modified |