| Callsign | K4US |
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2017-05-05 |
| Effective Date | 2022-11-09 |
| Expire Date | 2027-06-03 |
| Cancel Date | |
| Last Action Date | 2024-03-18 |
| End Date | 2027-06-03 |
| Available Date | 2029-06-04 |
| Applicant Type | B - Amateur Club |
| Entity Name | MOUNT VERNON AMATEUR RADIO CLUB |
| Street Address / Locality | PO Box 7234 Alexandria, VA 22307 |
| County | Fairfax County |
| Zip Location | 38°46'19.2"N 77°03'26.2"W |
| Maidenhead | FM18ls |
| FRN | 0005385331 |
| Licensee ID/SGIN | L00410179 / 000 |
| Licensee Class | |
| Callsign Group | A - 1x2 |
| ULS/Geo Region | 4 / 4 / VA |
| Prev Callsign / Prev Class | KE4ZXV |
| Next Callsign | |
| Trustee Callsign / Trustee Name | K3XEC Tagliamonte, Paul R |
| Vanity Type | D - In Memoriam (Club) |
| ULS File Number | 0010272587 |
| Phonetic weight / Morse weight | 10 / 44 |