C31KC — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving C31KC, decoded by SO8OO in southeastern Poland. 2,381 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 88 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-05.
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.
SO8OO decoded 2,381 FT8 messages attributed to C31KC as the transmitting token by decoded message structure across 88 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (46%), followed by 80 m (29%) and 40 m (16%). Most decodes (58%) fell within the six-hour window 20:00-02:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.
Overview
Bands
Last attributed message: 2026-10-05 06:37 UTC
Observed FT8 message patterns
- Attributed sample
- 2,381 messages
- Active dates
- 88 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -20 to -3.4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 737, moderate (-15 to -9 dB) 976, strong (≥ -8 dB) 668.
WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with C31KC in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to C31KC
The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.
- Attributed locator
- JN02 · 1,467 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,792 km (approx.)
- Last such locator decoded
- 2026-10-05 06:37 UTC
A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.
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 | C31KC S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-05 07:34 | 40m | - / -19 | HF5W | +3 / - | 2 | Partial capture |
| 10-05 07:34 | 40m | - / - | IK8DYE | -19 / - | 3 | Partial capture |
| 10-05 06:39 | 40m | - / - | DL3NAA | -6 / - | 2 | Partial capture |
| 10-05 06:35 | 40m | -19 / - | AM5CV | - / - | 4 | Partial capture |
| 10-05 06:33 | 40m | - / - | IK2ZJR | +3 / - | 13 | Partial capture |
| 10-05 06:32 | 40m | -10 / - | AO5CV | - / - | 5 | Partial capture |
| 10-05 06:28 | 40m | - / - | I0XVZ | -17 / - | 3 | Partial capture |
| 10-05 06:27 | 40m | - / - | PD3JW | -5 / - | 4 | Partial capture |
| 10-05 06:26 | 40m | - / - | IK2ZJR | +5 / - | 6 | Partial capture |
| 10-05 06:24 | 40m | -9 / - | AO5CV | - / - | 8 | Partial capture |
| 10-05 06:21 | 40m | - / - | IK1HGE | -4 / - | 4 | Partial capture |
| 10-05 06:14 | 40m | - / - | OE5RLP | +10 / - | 52 | Partial capture |
| 10-05 05:52 | 80m | - / - | S59YL | +9 / - | 3 | Partial capture |
| 10-05 05:50 | 80m | - / - | DO1FZL | -13 / - | 3 | Partial capture |
| 10-05 05:49 | 80m | - / - | DO4DXA | +3 / - | 3 | Partial capture |
| 10-05 05:49 | 80m | - / - | G0CUZ | -24 / - | 4 | Partial capture |
| 10-05 05:49 | 80m | - / - | ON6CQ | -24 / - | 2 | Partial capture |
| 10-05 05:48 | 80m | - / -20 | DO7RMS | +2 / - | 3 | ✓ Closing fragment |
| 10-05 03:50 | 80m | -15 / - | KB3VNG | - / - | 2 | Partial capture |
| 10-05 03:40 | 80m | -16 / - | N0BUZ | - / -19 | 2 | Partial capture |
| 10-05 02:55 | 80m | -15 / - | N4BWW | - / - | 2 | Partial capture |
| 10-05 02:50 | 80m | - / - | DH1TS | +2 / - | 3 | Partial capture |
| 10-05 02:50 | 80m | - / - | SV8TOZ | -3 / - | 3 | Partial capture |
| 10-05 02:43 | 80m | - / - | SV8TOZ | -4 / - | 2 | Partial capture |
| 10-05 02:39 | 80m | - / - | HA8LD | -1 / - | 3 | Partial capture |
| 10-05 02:35 | 80m | +6 / -20 | KV3R | -11 / -12 | 14 | ✓ Full exchange observed |
| 10-05 02:34 | 80m | - / - | SV8TOZ | -7 / - | 6 | Partial capture |
| 10-05 02:34 | 80m | - / -16 | SM7WNM | -10 / - | 2 | Partial capture |
| 10-04 23:48 | 160m | -17 / - | LZ2IP | - / - | 3 | Partial capture |
| 10-04 23:37 | 80m | - / - | DO4DXA | +14 / - | 4 | Partial capture |
| 10-04 23:35 | 80m | -16 / -14 | SQ9JTI | -1 / -15 | 5 | ✓ Full exchange observed |
| 10-04 06:23 | 40m | - / - | IU2OQT | +1 / - | 14 | Partial capture |
| 10-04 06:15 | 80m | - / -10 | Z62NS | -16 / - | 2 | ✓ Closing fragment |
| 10-04 06:12 | 80m | - / -10 | F1NQP | -8 / - | 3 | ✓ Closing fragment |
| 10-04 06:05 | 80m | - / - | G8AJM | -8 / - | 3 | ✓ Closing fragment |
| 10-04 05:43 | 80m | - / -12 | KO8SCA | -11 / - | 5 | ✓ Closing fragment |
| 10-04 04:59 | 80m | - / -16 | SQ7OBB | -10 / - | 2 | Partial capture |
| 10-04 04:46 | 80m | - / -12 | M9DNC | -10 / - | 2 | ✓ Closing fragment |
| 10-04 04:45 | 80m | - / - | DO7HZ | -13 / - | 3 | Partial capture |
| 10-04 04:44 | 80m | - / - | SP9HAB | 0 / - | 3 | Partial capture |
| 10-04 04:43 | 80m | - / -15 | LY8O | +2 / - | 4 | ✓ Closing fragment |
| 10-04 04:43 | 80m | - / - | UT1XU | -1 / - | 3 | Partial capture |
| 10-04 01:03 | 40m | +1 / - | 7Z1DS | - / - | 4 | Partial capture |
| 10-04 00:55 | 40m | +3 / - | 3Z4DX | - / +1 | 3 | ✓ Closing fragment |
| 10-04 00:54 | 40m | - / -16 | UK8OM | -9 / - | 3 | Partial capture |
| 10-04 00:53 | 40m | 0 / -8 | R9MJ | -3 / - | 4 | ✓ Closing observed |
| 10-03 23:00 | 80m | - / - | GW4HZA | -13 / - | 3 | Partial capture |
| 10-03 22:59 | 80m | -8 / -16 | SP4MSY | +11 / -19 | 3 | ✓ Full exchange observed |
| 10-03 22:58 | 80m | - / - | M0MLS | -4 / - | 4 | Partial capture |
| 10-03 22:56 | 80m | - / - | DL3XRZ | -13 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 063930 +10 692 C31KC OE5RLP JN77 063930 +8 2592 C31KC IK2ZJR JN45 063930 -7 2477 C31KC DL3NAA JN38 064000 +13 692 C31KC OE5RLP JN77 064000 -5 2477 C31KC DL3NAA JN38 064030 +12 692 C31KC OE5RLP JN77 (x5) 073415 -19 1219 C31KC IK8DYE JN71 073415 +3 2569 C31KC HF5W -19 (x2) 073615 -18 1207 C31KC IK8DYE JN71 (x2)
UTC dB Audio Message 054900 +7 395 C31KC DO7RMS 73 054930 -24 1263 C31KC G0CUZ IO82 054930 +3 506 C31KC DO4DXA JN58 055000 -24 1568 C31KC ON6CQ JO11 055000 -22 1264 C31KC G0CUZ IO82 055000 +6 506 C31KC DO4DXA JN58 055000 -8 1502 C31KC DO1FZL JO50 055030 +0 506 C31KC DO4DXA JN58 055030 -18 1502 C31KC DO1FZL JO50 055100 -24 1264 C31KC G0CUZ IO82 055100 -14 1502 C31KC DO1FZL JO50 055230 +6 1805 C31KC S59YL JN65 (x3) 060700 -4 751 C31KC AN5CV RR73
UTC dB Audio Message 035500 -16 1395 C31KC SV4FFK -16 (x2) 035815 +19 2580 C31KC DL3IAE -18 (x2) 040230 -24 1467 LA6YEA C31KC JN02 040315 +22 2735 C31KC E73S JN92 (x3) 212415 -16 1471 C31KC IK8INR JN70 (x4) 234845 -21 1477 LZ2IP C31KC JN02 (x3)
UTC dB Audio Message 202915 -13 1527 C31KC SM1NJC JO97 202930 -16 1529 CQ C31KC JN02 202945 -14 1527 C31KC SM1NJC JO97 203000 -17 1529 CQ C31KC JN02 203015 -14 1528 C31KC DL9YBH JO42 (x2) 203045 -13 1528 C31KC DL4HTK JO51 203100 -12 1529 C31KC DL9YBH JO42 203115 -9 1528 C31KC DL4HTK JO51 (x2) 203215 -20 1529 C31KC DL9YBH JO42 (x5)
UTC dB Audio Message 183445 -4 1884 C31KC AO5FSB RR73 183500 +2 1555 AO5FSB C31KC 73 183745 +0 1555 7X3WPL C31KC JN02 (x3) 183900 -1 1106 C31KC 7X3WPL -07 183915 -5 1555 7X3WPL C31KC R+14 183930 -8 1106 C31KC 7X3WPL -07 183945 -3 1555 7X3WPL C31KC R+14 184000 -10 1106 C31KC 7X3WPL -07 184015 -2 1555 7X3WPL C31KC R+14 184030 -9 1106 C31KC 7X3WPL RRR 184045 -4 1555 7X3WPL C31KC 73 122715 -4 1553 RI1FJL C31KC JN02 (x2)
UTC dB Audio Message 133300 -7 1337 C31KC DF7EE JO40 133330 -8 1473 C31KC DG2SAT 73 133330 -7 1099 C31KC DF8KI JO30 133330 -6 1337 C31KC DF7EE JO40 133400 -8 1099 C31KC DF8KI JO30 133400 -11 1337 C31KC DF7EE JO40 (x5) 143500 -11 2429 C31KC IK6CGO JN63 (x3) 145930 -13 2642 C31KC HB9FAN JN46 (x2)
Decoder S/N history by band
Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.
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