| Callsign | KR4OK |
|---|---|
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2018-09-25 |
| Effective Date | 2025-07-25 |
| Expire Date | 2028-12-23 |
| Cancel Date | |
| Last Action Date | 2025-07-25 |
| End Date | 2028-12-23 |
| Available Date | 2030-12-24 |
| Applicant Type | I - Individual |
| Entity Name | ALDERFER, JEFFREY M |
| Street Address / Locality | 223 American Way #104 Harleysville, PA 19438 |
| County | Montgomery County |
| Zip Location | 40°16'10.0"N 75°23'24.0"W |
| Maidenhead | FN20hg |
| FRN | 0004008108 |
| Licensee ID/SGIN | L00279150 / 000 |
| Licensee Class | A - Advanced |
| Callsign Group | B - 2x2 |
| ULS/Geo Region | 4 / 3 / PA |
| Prev Callsign / Prev Class | K3JMA T - Technician |
| Next Callsign | WA4JMA K3JMA |
| Trustee Callsign / Trustee Name | |
| Vanity Type | A - Former Holder |
| ULS File Number | |
| Phonetic weight / Morse weight | 11 / 62 |
Administrative History
| Action Date | Action Type |
|---|---|
| 2008-12-23 | LIISS - License Issued |
| 2008-12-23 | VANGRT - Vanity Call Sign Assigned |
| 2018-09-25 | LIREN - License Renewed |
| 2021-08-23 | LIAUA - Administrative Update Applied |
| 2021-08-25 | LIAUA - Administrative Update Applied |
| 2025-07-25 | LIAUA - Administrative Update Applied |
| 2025-07-25 | LIAUA - Administrative Update Applied |
| 2025-07-25 | LIAUA - Administrative Update Applied |