| Callsign | KR4JSR |
|---|---|
| Radio Service | HA - Amateur |
| License Status | C - Canceled |
| Grant Date | 2026-02-12 |
| Effective Date | 2026-03-09 |
| Expire Date | 2036-02-12 |
| Cancel Date | 2026-03-31 |
| Last Action Date | 2026-03-31 |
| End Date | 2026-03-31 |
| Available Date | 2028-04-01 |
| Applicant Type | I - Individual |
| Entity Name | Sylvester, Christopher |
| Street Address / Locality | 119 Prairie Dr Louisville, KY 402296132 |
| County | Jefferson County |
| Zip Location | 38°05'22.2"N 85°39'14.0"W |
| Maidenhead | EM78ec |
| FRN | 0037929130 |
| Licensee ID/SGIN | L03011335 / 000 |
| Licensee Class | G - General |
| Callsign Group | D - 2x3 |
| ULS/Geo Region | 4 / 4 / KY |
| Prev Callsign / Prev Class | T - Technician |
| Next Callsign | W3CMS |
| Trustee Callsign / Trustee Name | |
| Vanity Type | |
| ULS File Number | 0011939127 |
| Phonetic weight / Morse weight | 16 / 70 |
Administrative History
| Action Date | Action Type |
|---|---|
| 2026-02-12 | SYSGRT - New Systematic Call Sign Assigned |
| 2026-02-12 | LIISS - License Issued |
| 2026-03-09 | LIMOD - License Modified |
| 2026-03-31 | LICAN - License Canceled |
FCC comments
| 2026-03-31 | Issued vanity call sign. |