ZL4KX — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving ZL4KX, decoded by SO8OO in southeastern Poland. 295 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 31 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-22.
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 295 FT8 messages attributed to ZL4KX as the transmitting token by decoded message structure across 31 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (56%), followed by 80 m (26%) and 40 m (17%). Most decodes (51%) 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 -10 dB.
Overview
Bands
Last attributed message: 2026-10-22 05:25 UTC
Observed FT8 message patterns
- Attributed sample
- 295 messages
- Active dates
- 31 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -17 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 45, moderate (-15 to -9 dB) 146, strong (≥ -8 dB) 104.
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 ZL4KX 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 ZL4KX
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
- RE54 · 120 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 17,677 km (approx.)
- Last such locator decoded
- 2026-10-22 05:25 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 | ZL4KX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-22 08:47 | 40m | - / - | PA3GAE | -15 / - | 3 | Partial capture |
| 10-22 05:26 | 40m | - / - | F4NGR | -10 / - | 4 | Partial capture |
| 10-22 05:25 | 40m | - / - | HB9AMO | -11 / - | 2 | Partial capture |
| 10-17 06:17 | 60m | - / -11 | LA9GX | -3 / - | 4 | ✓ Closing fragment |
| 10-17 06:16 | 60m | - / - | DL6ZXG | +9 / - | 2 | Partial capture |
| 10-17 06:14 | 60m | - / - | IK5ZPV | -13 / - | 10 | Partial capture |
| 10-17 06:13 | 60m | - / -18 | DK1BN | +16 / - | 2 | ✓ Closing fragment |
| 10-15 18:54 | 40m | - / - | UA3ZNQ | -10 / - | 3 | Partial capture |
| 10-15 18:52 | 40m | - / - | RX3AEX | -6 / - | 3 | Partial capture |
| 10-15 18:50 | 40m | - / - | RC6OG | -5 / - | 8 | Partial capture |
| 10-15 18:49 | 40m | - / - | DL0BSO | -10 / - | 2 | Partial capture |
| 10-15 18:48 | 40m | - / -5 | GU4WRP | -5 / - | 2 | ✓ Closing fragment |
| 10-15 18:48 | 40m | - / - | IU1DOF | -2 / - | 2 | Partial capture |
| 10-15 18:22 | 40m | - / - | DM4GG | +10 / - | 2 | Partial capture |
| 10-15 18:21 | 40m | - / - | IZ5MMT | -1 / - | 2 | Partial capture |
| 10-15 18:20 | 40m | - / - | DL6MRM | +3 / - | 3 | Partial capture |
| 10-15 18:20 | 40m | - / - | PE1NPS | -7 / - | 3 | Partial capture |
| 10-15 18:20 | 40m | - / -9 | DF1IH | -2 / - | 5 | Partial capture |
| 10-15 18:19 | 40m | - / -8 | OH3OJ | +9 / - | 2 | ✓ Closing fragment |
| 10-15 18:17 | 40m | - / - | GM4FDM | +1 / - | 4 | Partial capture |
| 10-15 18:17 | 40m | - / -10 | R3LDK | -14 / - | 5 | Partial capture |
| 10-15 18:12 | 40m | - / -18 | 4X6ZK | -10 / - | 3 | ✓ Closing fragment |
| 10-15 18:12 | 40m | - / -22 | DA1MN | -1 / - | 3 | Partial capture |
| 10-15 17:57 | 40m | - / - | GM4FDM | -2 / - | 2 | Partial capture |
| 10-15 17:56 | 40m | - / - | R1BDX | -8 / - | 4 | Partial capture |
| 10-15 17:56 | 40m | - / - | UB6OFG | -7 / - | 3 | Partial capture |
| 10-15 17:56 | 40m | - / -15 | RA6BL | +3 / - | 4 | Partial capture |
| 10-15 17:55 | 40m | - / -12 | G4OFR | -5 / - | 4 | ✓ Closing fragment |
| 10-15 17:55 | 40m | - / - | YO8AAZ | -6 / - | 6 | Partial capture |
| 10-15 17:40 | 40m | - / -21 | RU4SO | -9 / - | 2 | Partial capture |
| 10-15 17:40 | 40m | - / - | RA6BL | +2 / - | 5 | Partial capture |
| 10-15 17:39 | 40m | - / - | OK1UG | +5 / - | 4 | Partial capture |
| 10-15 17:38 | 40m | - / -15 | IK3MLF | -10 / - | 10 | Partial capture |
| 10-15 17:38 | 40m | - / - | RZ4FWA | -18 / - | 3 | Partial capture |
| 10-15 17:38 | 40m | - / - | YO2NAA | +3 / - | 6 | Partial capture |
| 10-15 17:37 | 40m | - / - | SP2SGZ | 0 / - | 2 | Partial capture |
| 10-14 19:18 | 40m | - / - | GW4NOO | -14 / - | 2 | Partial capture |
| 10-13 19:42 | 40m | - / - | G4SFS | -11 / - | 5 | Partial capture |
| 10-13 19:42 | 40m | - / -12 | LX1JX | +8 / - | 4 | ✓ Closing fragment |
| 10-13 19:38 | 40m | - / -11 | RY7G | -8 / - | 9 | ✓ Closing fragment |
| 10-13 19:38 | 40m | - / -15 | UA3GX | -5 / - | 5 | ✓ Closing fragment |
| 10-13 19:35 | 40m | - / - | G7KHF | +4 / - | 2 | Partial capture |
| 10-13 19:34 | 40m | - / - | RA3ZH | +3 / - | 4 | Partial capture |
| 10-13 19:33 | 40m | - / - | UA3GX | -8 / - | 6 | Partial capture |
| 10-13 19:31 | 40m | - / -21 | DF1OLS | 0 / - | 4 | ✓ Closing fragment |
| 10-13 19:29 | 40m | - / - | RA3ZH | +9 / - | 5 | Partial capture |
| 10-13 19:28 | 40m | - / -8 | DF7FO | 0 / - | 5 | ✓ Closing fragment |
| 10-13 19:25 | 40m | - / - | UB1CCL | 0 / - | 3 | Partial capture |
| 10-13 19:23 | 40m | - / - | RA3ZH | +1 / - | 2 | Partial capture |
| 10-13 19:23 | 40m | - / -9 | RM3DA | -4 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 185330 -4 2082 ZL4KX RC6OG KN98 (x2) 185430 -10 1279 ZL4KX UA3ZNQ KO81 (x3) 052500 -9 2350 ZL4KX HB9AMO JN36 052515 -18 2092 TO4A ZL4KX RE54 052530 -13 2349 ZL4KX HB9AMO JN36 052600 -10 1542 ZL4KX F4NGR JN33 (x4) 084730 -17 934 ZL4KX PA3GAE JO21 (x3)
UTC dB Audio Message 061445 -13 1087 ZL4KX IK5ZPV JN53 (x5) 061645 +10 2540 ZL4KX DL6ZXG JO51 061715 -5 747 ZL4KX LA9GX JO59 061715 -12 1086 ZL4KX IK5ZPV JN53 061715 +8 2540 ZL4KX DL6ZXG JO51 061745 -1 747 ZL4KX LA9GX JO59 061745 -15 1086 ZL4KX IK5ZPV JN53 061815 -3 747 ZL4KX LA9GX R-11 061815 -14 1086 ZL4KX IK5ZPV JN53 061845 -4 747 ZL4KX LA9GX 73 061845 -12 1086 ZL4KX IK5ZPV JN53
UTC dB Audio Message 064145 +0 1905 ZL4KX ON8DM JO10 062945 -8 1686 ZL4KX EA6Y JM19 (x2) 063045 -6 2406 ZL4KX F1RHS R-05 063045 -12 1686 ZL4KX EA6Y JM19 063115 -7 2405 ZL4KX F1RHS 73 063115 -12 1686 ZL4KX EA6Y JM19 (x3) 063245 -15 952 ZL4KX F4LZZ RR73 063245 -14 1685 ZL4KX EA6Y JM19 (x3) 063415 -18 1779 ZL4KX ON8DM JO10 063415 -13 1686 ZL4KX EA6Y 73
UTC dB Audio Message 035445 +13 2485 ZL4KX R6FY LN05 (x2) 035515 -2 466 ZL4KX <...> -15 035545 -8 1074 ZL4KX RK4H LO53 035545 +9 2485 ZL4KX R6FY LN05 035545 -5 465 <ZL4KX> EY35S RR73 035615 +3 560 ZL4KX RW9WT LO64 035615 -3 1074 ZL4KX RK4H LO53 035615 +7 2485 ZL4KX R6FY LN05 035645 +10 560 ZL4KX RW9WT LO64 035645 -3 464 ZL4KX EY35S RR73 035645 -1 319 ZL4KX 4L7T LN21 035745 +2 3012 ZL4KX R4RM LO55 035745 +0 319 ZL4KX 4L7T LN21 (x2)
UTC dB Audio Message 214000 -13 1393 ZL4KX PA5VL -15 214630 -19 2264 ZL4KX PA3BQC JO22 (x4) 214900 -23 1393 ZL4KX PA5VL -10 (x4) 211345 -21 2112 ZL4KX I5IAR JN53 (x2) 204145 -19 2381 ZL4KX G6CUT IO90 211315 -15 880 DO7BE ZL4KX RR73 212145 -17 1060 SP2TQQ ZL4KX RR73 212245 -17 1060 DL2TOS ZL4KX RR73
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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