| Callsign | K4RCP |
| Radio Service | HV - Vanity |
| License Status | E - Expired |
| Grant Date | 2006-11-03 |
| Effective Date | 2006-11-03 |
| Expire Date | 2016-11-03 |
| Cancel Date | 2018-11-06 |
| Last Action Date | 2018-11-06 |
| End Date | 2016-11-03 |
| Available Date | 2018-12-07 |
| Applicant Type | I - Individual |
| Entity Name | CASWELL, MARK K |
| Street Address / Locality | 11911-66th St No #430 Largo, FL 33773 |
| County | Pinellas County |
| Zip Location | 27°52'56.3"N 82°45'21.3"W |
| Maidenhead | EL87ov |
| FRN | 0003076437 |
| Licensee ID/SGIN | L00180451 / 000 |
| Licensee Class | G - General |
| Callsign Group | C - 1x3 |
| ULS/Geo Region | 4 / 4 / FL |
| Prev Callsign / Prev Class | KF4RCP P - Technician Plus |
| Next Callsign | |
| Trustee Callsign / Trustee Name | |
| Vanity Type | E - By List |
| ULS File Number | |
| Phonetic weight / Morse weight | 11 / 64 |