S21ALT — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving S21ALT, decoded by SO8OO in southeastern Poland. 223 indexed activity records, involving 20m. Heard between 2026-07-15 and 2026-07-29.
These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.
Overview
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with S21ALT in decoded directed-looking exchanges:
Observed FT8 exchanges
S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.
| Time UTC | Band | S21ALT S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-29 17:47 | 20m | - / -15 | G6GA | -6 / - | 9 | Partial capture |
| 07-29 17:12 | 20m | - / - | PD1ADA | -14 / - | 4 | Partial capture |
| 07-29 16:40 | 20m | - / -19 | R4HJN | -6 / - | 4 | Partial capture |
| 07-29 16:40 | 20m | - / -7 | YU7YZ | 0 / - | 5 | ✓ Closing fragment |
| 07-29 16:39 | 20m | - / -16 | S59A | -3 / - | 3 | ✓ Closing fragment |
| 07-29 16:35 | 20m | - / - | YU7YZ | +1 / - | 6 | Partial capture |
| 07-29 16:32 | 20m | - / - | R4HJN | -8 / - | 10 | Partial capture |
| 07-29 16:31 | 20m | - / - | M0KZC/P | -8 / - | 2 | Partial capture |
| 07-29 16:31 | 20m | - / -16 | S59A | +2 / - | 2 | Partial capture |
| 07-29 16:23 | 20m | - / - | RW6MDU | -4 / - | 2 | Partial capture |
| 07-29 16:23 | 20m | - / - | R4HJN | -2 / - | 8 | Partial capture |
| 07-29 16:03 | 20m | - / - | RN3OG | -12 / - | 3 | Partial capture |
| 07-29 16:02 | 20m | - / - | RA3THN | -7 / - | 3 | Partial capture |
| 07-29 15:59 | 20m | - / - | UW5ESX | -6 / - | 2 | Partial capture |
| 07-29 15:58 | 20m | - / - | DL1CF | +4 / - | 11 | Partial capture |
| 07-29 15:57 | 20m | - / - | RA6AVP | -18 / - | 4 | Partial capture |
| 07-29 15:53 | 20m | - / -13 | EB5AFK | -14 / - | 3 | Partial capture |
| 07-29 15:52 | 20m | - / - | UW5ESX | -7 / - | 2 | Partial capture |
| 07-29 15:32 | 20m | - / - | R3TIT | -8 / - | 2 | Partial capture |
| 07-29 15:31 | 20m | - / - | 9A3K | +6 / - | 2 | Partial capture |
| 07-28 14:36 | 20m | - / +1 | UG4L | -8 / - | 3 | ✓ Closing fragment |
| 07-21 16:14 | 20m | - / - | EA5RU | 0 / - | 4 | Partial capture |
| 07-21 16:12 | 20m | - / - | R7RBE | -4 / - | 3 | Partial capture |
| 07-21 16:08 | 20m | - / - | F1PFU | -16 / - | 5 | Partial capture |
| 07-21 16:07 | 20m | - / - | GM4SUF | -10 / - | 2 | Partial capture |
| 07-21 16:04 | 20m | - / - | GM4SUF | -6 / - | 2 | Partial capture |
| 07-21 16:02 | 20m | - / -19 | HG2DX | +9 / - | 2 | Partial capture |
| 07-21 16:01 | 20m | - / - | LZ1BT | -12 / - | 4 | Partial capture |
| 07-21 16:00 | 20m | - / - | IV3UWA/0 | +1 / - | 9 | Partial capture |
| 07-21 15:59 | 20m | - / - | DL1R | 0 / - | 8 | Partial capture |
| 07-21 15:40 | 20m | - / - | RY6O | -17 / - | 2 | Partial capture |
| 07-21 14:37 | 20m | - / -18 | YO4NT | +7 / - | 2 | Partial capture |
| 07-21 00:21 | 20m | - / -11 | 9A5E | -13 / - | 3 | ✓ Closing fragment |
| 07-19 18:36 | 20m | - / - | IZ2EID | -1 / - | 7 | Partial capture |
| 07-19 17:55 | 20m | - / -18 | S57AM | -17 / - | 2 | Partial capture |
| 07-16 16:39 | 20m | - / -23 | DL6LAG | -10 / - | 9 | Partial capture |
| 07-16 16:16 | 20m | - / - | IU5RTR | -4 / - | 2 | Partial capture |
| 07-15 18:01 | 20m | - / - | RK3AQ | -12 / - | 2 | ✓ Closing fragment |
| 07-15 17:59 | 20m | - / -10 | R7AZ | -8 / - | 2 | Partial capture |
| 07-15 17:52 | 20m | - / - | DL6LAG | -4 / - | 6 | Partial capture |
| 07-15 17:37 | 20m | - / -14 | UA3SAO | -13 / - | 2 | Partial capture |
| 07-15 17:21 | 20m | - / - | UA9FAR | -10 / - | 2 | Partial capture |
| 07-15 17:19 | 20m | - / - | OZ1BUR | -10 / - | 2 | ✓ Closing fragment |
| 07-15 17:08 | 20m | - / - | HA2AI | -1 / - | 9 | Partial capture |
| 07-15 17:07 | 20m | - / - | RK3AQ | -18 / - | 4 | Partial capture |
| 07-15 16:28 | 20m | - / -12 | EA7ALL | -8 / - | 6 | ✓ Closing fragment |
| 07-15 16:27 | 20m | - / - | DL1VJL | +2 / - | 5 | Partial capture |
| 07-15 16:26 | 20m | - / - | DL8UVG | +5 / - | 2 | Partial capture |
| 07-15 16:26 | 20m | - / - | F1NQP | -8 / - | 2 | Partial capture |
| 07-15 16:25 | 20m | - / - | DL5XU | -1 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 164245 +4 2521 S21ALT YU7YZ R-07 (x2) 171215 -16 2034 S21ALT PD1ADA JO21 (x4) 174745 -5 1024 S21ALT G6GA IO82 (x9)
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee