| Callsign | KC1SF |
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2025-04-01 |
| Effective Date | 2025-04-21 |
| Expire Date | 2035-04-28 |
| Cancel Date | |
| Last Action Date | 2025-04-21 |
| End Date | 2035-04-28 |
| Available Date | 2037-04-29 |
| Applicant Type | B - Amateur Club |
| Entity Name | Special Forces Brothers Amateur Radio Club |
| Street Address / Locality | 17 Perkins Rd MIDDLETON, MA 01949 |
| County | Essex County |
| Zip Location | 42°36'37.8"N 71°00'25.6"W |
| Maidenhead | FN42lo |
| FRN | 0024497638 |
| Licensee ID/SGIN | L01935285 / 000 |
| Licensee Class | |
| Callsign Group | B - 2x2 |
| ULS/Geo Region | 1 / 1 / MA |
| Prev Callsign / Prev Class | KC1DOA |
| Next Callsign | |
| Trustee Callsign / Trustee Name | KM6OP COAD, JON L |
| Vanity Type | F - By List (Club) |
| ULS File Number | 0011537134 |
| Phonetic weight / Morse weight | 10 / 66 |