| Callsign | K4HTO |
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2021-02-04 |
| Effective Date | 2021-02-04 |
| Expire Date | 2031-04-26 |
| Cancel Date | |
| Last Action Date | 2024-03-18 |
| End Date | 2031-04-26 |
| Available Date | 2033-04-27 |
| Applicant Type | B - Amateur Club |
| Entity Name | HOWARD W MASTERMAN MEMORIAL ARC |
| Street Address / Locality | 212 Melodie Lane Pierson, FL 32180 |
| County | Volusia County |
| Zip Location | 29°14'10.7"N 81°23'48.1"W |
| Maidenhead | EL99hf |
| FRN | 0004199774 |
| Licensee ID/SGIN | L00297426 / 000 |
| Licensee Class | |
| Callsign Group | C - 1x3 |
| ULS/Geo Region | 4 / 4 / FL |
| Prev Callsign / Prev Class | KJ4ZYY |
| Next Callsign | |
| Trustee Callsign / Trustee Name | W7IMP MASTERMAN, JACK H |
| Vanity Type | D - In Memoriam (Club) |
| ULS File Number | 0009402741 |
| Phonetic weight / Morse weight | 10 / 56 |