4Z5MY — 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 4Z5MY, decoded by SO8OO in southeastern Poland. 447 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 25 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-31.
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 447 FT8 messages attributed to 4Z5MY as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (99%), followed by 10 m (1%). Most decodes (95%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (76%); the estimated median was -4 dB.
Overview
Bands
Last attributed message: 2026-10-31 10:10 UTC
Observed FT8 message patterns
- Attributed sample
- 447 messages
- Active dates
- 25 UTC dates
- Estimated median S/N
- -4 dB
- Estimated 10th-90th percentile
- -11 to +5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 105, strong (≥ -8 dB) 339.
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 4Z5MY 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 4Z5MY
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
- KM71 · 114 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,325 km (approx.)
- Last such locator decoded
- 2026-10-31 10:10 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 | 4Z5MY S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-31 10:08 | 10m | -5 / -15 | RA9ACA | -11 / - | 2 | ✓ Closing observed |
| 10-31 08:56 | 10m | - / -22 | CT7BRV | 0 / - | 6 | Partial capture |
| 08-28 20:04 | 20m | - / -9 | IZ4JMA | -5 / - | 3 | ✓ Closing fragment |
| 08-28 19:55 | 20m | -12 / - | <...> | - / -14 | 2 | Partial capture |
| 08-28 19:51 | 20m | -11 / - | WA3AEP | - / -16 | 2 | Partial capture |
| 08-27 20:46 | 20m | -12 / - | WB3JSW | - / -15 | 2 | Partial capture |
| 08-27 20:41 | 20m | -8 / - | PD4FL | -6 / -19 | 2 | Partial capture |
| 08-27 20:39 | 20m | -10 / -13 | IU1DXU | -7 / - | 10 | ✓ Closing observed |
| 08-27 20:36 | 20m | -9 / - | JA0CFA | - / -19 | 2 | ✓ Closing fragment |
| 08-27 20:34 | 20m | -10 / - | JH5AVM | - / -13 | 3 | ✓ Closing fragment |
| 08-27 20:31 | 20m | -12 / - | OH5YL | - / -12 | 2 | ✓ Closing fragment |
| 08-27 20:06 | 20m | -11 / - | OE8PPL | - / -12 | 2 | ✓ Closing fragment |
| 08-27 19:58 | 20m | - / - | DH2RL | -7 / - | 3 | Partial capture |
| 08-27 19:58 | 20m | - / - | F4EGM | +12 / - | 2 | Partial capture |
| 08-26 19:55 | 20m | -10 / -8 | RI1FJL | -9 / -18 | 2 | Partial capture |
| 08-26 19:53 | 20m | -12 / - | F4JZW | +1 / -14 | 4 | Partial capture |
| 08-24 06:41 | 20m | - / -12 | IS0AFM | -13 / - | 6 | Partial capture |
| 08-23 20:19 | 20m | +5 / - | II7MGBR | - / -11 | 5 | Partial capture |
| 08-23 20:16 | 20m | +10 / - | YT1VDA | - / -7 | 3 | Partial capture |
| 08-23 20:14 | 20m | +10 / - | TA1GRH | - / -17 | 3 | ✓ Closing fragment |
| 08-23 20:10 | 20m | +8 / -19 | VE3ARF | -13 / -18 | 6 | ✓ Full exchange observed |
| 08-23 20:08 | 20m | +6 / - | ER3BN | - / -11 | 4 | Partial capture |
| 08-23 20:04 | 20m | +5 / - | DL3EBJ | - / -12 | 2 | ✓ Closing fragment |
| 08-23 20:02 | 20m | 0 / - | ON4DS | -4 / -12 | 3 | ✓ Closing observed |
| 08-23 20:00 | 20m | -2 / - | G8WVB | - / -10 | 3 | Partial capture |
| 08-23 19:52 | 20m | - / -20 | PD3FR | +7 / - | 3 | ✓ Closing fragment |
| 08-23 19:47 | 20m | - / -28 | G8GDS | +2 / - | 3 | Partial capture |
| 08-23 08:48 | 20m | - / -16 | EN35UKR | -15 / - | 2 | Partial capture |
| 08-22 19:51 | 20m | +7 / -20 | R7ZY | +3 / - | 2 | ✓ Closing observed |
| 08-22 19:43 | 20m | - / - | G7MYR | -7 / - | 4 | Partial capture |
| 08-22 19:43 | 20m | -12 / -20 | DH7ULX | +8 / - | 5 | ✓ Closing observed |
| 08-22 07:29 | 20m | - / -8 | F4UJU | +14 / - | 4 | ✓ Closing fragment |
| 08-21 20:06 | 20m | -5 / - | KZ2I | - / -19 | 2 | Partial capture |
| 08-21 19:48 | 20m | -11 / -13 | AH2O | -7 / -15 | 7 | ✓ Full exchange observed |
| 08-21 19:38 | 20m | -18 / - | XU7O | - / -23 | 2 | Partial capture |
| 08-21 19:28 | 20m | -8 / -11 | EA2BHE | +1 / -12 | 4 | ✓ Full exchange observed |
| 08-20 13:27 | 20m | - / -21 | UA1OJL | -10 / - | 3 | ✓ Closing fragment |
| 08-19 20:01 | 20m | -7 / - | F4ACR | +9 / -16 | 3 | Partial capture |
| 08-19 19:31 | 20m | - / -17 | PY7XC | -10 / - | 2 | ✓ Closing fragment |
| 08-14 20:01 | 20m | - / - | M7MHI | -8 / - | 3 | Partial capture |
| 08-14 19:47 | 20m | - / -12 | EC3A | -12 / - | 2 | Partial capture |
| 08-14 19:40 | 20m | - / -15 | EC3A | -16 / - | 2 | Partial capture |
| 08-14 19:37 | 20m | - / -18 | EG2FPA | -2 / - | 2 | Partial capture |
| 08-11 19:37 | 20m | - / -8 | EA1FAW | -10 / - | 2 | ✓ Closing fragment |
| 08-11 19:34 | 20m | - / -6 | SP4TKA | +4 / - | 2 | ✓ Closing fragment |
| 08-11 19:33 | 20m | - / - | PD9JPV | -6 / - | 3 | Partial capture |
| 08-09 19:48 | 20m | - / -17 | EA1KCU | -6 / - | 2 | ✓ Closing fragment |
| 08-09 19:45 | 20m | - / -13 | CT2GFJ | -6 / - | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 135400 -8 2882 CQ 4Z5MY KM71 a1 085615 -3 966 4Z5MY CT7BRV R-22 (x6) 100630 -4 2883 CQ 4Z5MY KM71 100815 -11 1743 4Z5MY RA9ACA R-15 100830 -5 2884 RA9ACA 4Z5MY RR73 101000 -7 2884 CQ 4Z5MY KM71
UTC dB Audio Message 195200 -2 801 4Z5MY R6DZR R-20 195045 -1 1120 4Z5MY RA6FCU R-10
UTC dB Audio Message 204600 -13 2980 WB3JSW 4Z5MY -15 (x2) 194900 -8 2991 CQ 4Z5MY KM71 195015 -7 539 4Z5MY IZ4JMA JN54 195015 -9 2989 CQ 4Z5MY KM71 (x2) 195115 -10 2988 WA3AEP 4Z5MY -16 (x2) 195515 -11 2984 <...> 4Z5MY -14 (x2) 195700 -11 2247 4Z5MY G8ANJ IO91 200445 +1 966 4Z5MY IZ4JMA R-09 (x3) 200900 -14 2979 M0GLV 4Z5MY -21
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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