| Callsign | KY4DX |
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2017-01-06 |
| Effective Date | 2017-01-06 |
| Expire Date | 2027-02-12 |
| Cancel Date | |
| Last Action Date | 2024-03-13 |
| End Date | 2027-02-12 |
| Available Date | 2029-02-13 |
| Applicant Type | B - Amateur Club |
| Entity Name | DERBY CITY DX ASSOCIATION |
| Street Address / Locality | 5504 DATURA LN LOUISVILLE, KY 40258 |
| County | Jefferson County |
| Zip Location | 38°08'46.6"N 85°52'40.5"W |
| Maidenhead | EM78bd |
| FRN | 0015910417 |
| Licensee ID/SGIN | L01229077 / 000 |
| Licensee Class | |
| Callsign Group | B - 2x2 |
| ULS/Geo Region | 4 / 4 / KY |
| Prev Callsign / Prev Class | KF4NNY |
| Next Callsign | |
| Trustee Callsign / Trustee Name | K4TXJ VAUGHAN, JAMES C |
| Vanity Type | F - By List (Club) |
| ULS File Number | 0007612859 |
| Phonetic weight / Morse weight | 10 / 66 |