4Z4DX — 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 4Z4DX, decoded by SO8OO in southeastern Poland. 802 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 90 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-05.
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 802 FT8 messages attributed to 4Z4DX as the transmitting token by decoded message structure across 90 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (42%), followed by 40 m (40%) and 60 m (8%). The busiest six-hour window was 00:00-06:00 UTC, containing 45% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.
Overview
Bands
Last attributed message: 2026-11-05 03:13 UTC
Observed FT8 message patterns
- Attributed sample
- 802 messages
- Active dates
- 90 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -21 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 273, moderate (-15 to -9 dB) 308, strong (≥ -8 dB) 221.
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 4Z4DX 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 4Z4DX
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
- KM72 · 503 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,224 km (approx.)
- Last such locator decoded
- 2026-11-05 03:13 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 | 4Z4DX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-04 19:20 | 40m | -13 / -15 | HB9ELE | +4 / - | 6 | ✓ Closing observed |
| 11-04 01:54 | 40m | - / -2 | OS4K | -17 / - | 3 | Partial capture |
| 11-04 01:54 | 40m | -13 / - | WB8YJF | - / 0 | 2 | ✓ Closing fragment |
| 11-03 17:45 | 40m | - / -14 | ES2AJ | +15 / - | 2 | Partial capture |
| 11-03 01:58 | 80m | - / +2 | LZ911TD | -12 / - | 2 | Partial capture |
| 11-02 21:22 | 40m | - / -11 | MI0TBE | -15 / - | 3 | Partial capture |
| 11-02 21:03 | 40m | -14 / +5 | VI40EUDXF | -8 / -2 | 4 | Partial capture |
| 11-02 20:40 | 40m | - / -17 | PF40EUDXF | -9 / - | 2 | Partial capture |
| 11-02 16:35 | 40m | -14 / - | RC8SAB | - / -10 | 3 | ✓ Closing fragment |
| 11-02 16:18 | 40m | -9 / -2 | PF40EUDXF | -8 / -8 | 6 | Partial capture |
| 11-01 00:56 | 40m | -17 / - | KW4BY | - / - | 2 | Partial capture |
| 10-31 20:07 | 40m | -11 / - | I/KF0SPC | - / +2 | 3 | Partial capture |
| 10-31 20:03 | 40m | -6 / - | M5WJF | - / - | 2 | Partial capture |
| 10-31 19:50 | 40m | -2 / - | RC2GB | - / - | 2 | Partial capture |
| 10-31 19:47 | 40m | -2 / - | EG5TES | - / - | 3 | Partial capture |
| 10-31 17:27 | 40m | -18 / - | TC0TR | - / +4 | 3 | ✓ Closing fragment |
| 10-29 22:12 | 40m | -11 / - | GD3SKZ | - / - | 2 | Partial capture |
| 10-29 22:08 | 40m | -22 / - | BI1LWV | - / -19 | 2 | Partial capture |
| 10-29 21:48 | 40m | -7 / - | TC9ATA | - / -8 | 3 | ✓ Closing fragment |
| 10-28 19:22 | 60m | - / -10 | EH6DSY | -15 / - | 2 | ✓ Closing fragment |
| 10-28 19:16 | 60m | - / -10 | IQ0AAI | -6 / - | 2 | ✓ Closing fragment |
| 10-28 19:14 | 80m | - / -12 | TC1TR | +4 / - | 2 | ✓ Closing fragment |
| 10-28 15:56 | 40m | - / -10 | TC1TR | -11 / - | 3 | ✓ Closing fragment |
| 10-27 04:21 | 60m | - / -8 | IN3IZQ | -14 / - | 10 | Partial capture |
| 10-27 04:17 | 60m | - / -10 | HB9DBM | +10 / - | 2 | ✓ Closing fragment |
| 10-27 04:14 | 60m | - / -21 | SM7NDX | -12 / - | 3 | ✓ Closing fragment |
| 10-27 04:02 | 40m | -4 / - | P4/WE9V | - / - | 2 | Partial capture |
| 10-27 03:29 | 60m | - / -15 | N1DG | -8 / - | 4 | ✓ Closing fragment |
| 10-27 03:29 | 60m | - / - | SM3ULU | -10 / - | 2 | Partial capture |
| 10-27 03:21 | 40m | -22 / - | 7P8GE | - / -11 | 3 | Partial capture |
| 10-26 17:53 | 60m | - / -10 | LZ1GC | +4 / - | 5 | ✓ Closing fragment |
| 10-26 17:52 | 60m | - / -19 | LZ26IPA | -16 / - | 4 | ✓ Closing fragment |
| 10-26 04:26 | 40m | -13 / -9 | TO4A | 0 / -7 | 7 | ✓ Full exchange observed |
| 10-25 22:46 | 60m | - / -7 | PA4PA | -2 / - | 2 | Partial capture |
| 10-25 22:38 | 60m | -24 / -6 | EI6IZ | -18 / -25 | 4 | Partial capture |
| 10-25 22:24 | 40m | -10 / - | BH3FZG | - / - | 4 | Partial capture |
| 10-25 22:22 | 40m | -10 / - | BG2GWN | - / -3 | 2 | ✓ Closing fragment |
| 10-25 22:20 | 40m | -12 / - | JN7JPK | - / -8 | 3 | Partial capture |
| 10-25 22:06 | 40m | -10 / - | OE3UKW | - / -4 | 2 | ✓ Closing fragment |
| 10-25 22:05 | 40m | -10 / - | MI0TBE | - / -10 | 3 | Partial capture |
| 10-25 21:52 | 40m | -4 / -13 | 5B/ES5RY | -10 / -13 | 5 | Partial capture |
| 10-25 21:49 | 40m | -15 / - | BH3FZG | - / - | 2 | Partial capture |
| 10-25 21:42 | 40m | -8 / - | TA2PYZ | - / -16 | 4 | ✓ Closing fragment |
| 10-25 21:41 | 40m | -16 / -9 | EG46PPA | +5 / -7 | 3 | Partial capture |
| 10-25 21:38 | 40m | -12 / - | EU7FBB | - / - | 2 | ✓ Closing fragment |
| 10-25 21:36 | 40m | -19 / - | SN9Q | - / -7 | 3 | ✓ Closing fragment |
| 10-25 21:34 | 40m | -11 / - | MW0USK | - / - | 3 | ✓ Closing fragment |
| 10-25 21:15 | 40m | 0 / - | RD0L/P | - / -5 | 2 | ✓ Closing fragment |
| 10-17 19:28 | 40m | -15 / -1 | IK1MJK/P | -2 / - | 3 | Partial capture |
| 10-17 19:22 | 40m | -7 / - | S79VU | - / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 015530 -11 1090 4X5CG 4Z4DX -11 015545 -17 1931 4Z4DX OS4K -02 015745 -17 1317 4Z4DX GM6URC -10 192030 +11 594 4Z4DX HB9ELE JN47 (x5) 192245 -13 594 HB9ELE 4Z4DX RR73 192845 -6 339 A60FD/14 4Z4DX KM72 192945 -9 339 VJ6X 4Z4DX KM72 194715 -22 1894 TC9TR 4Z4DX R-15 203045 -12 516 DD3ZZ 4Z4DX KM72 031345 -15 1091 N4NF 4Z4DX KM72 034045 -14 1075 4Z4DX HA8IB -11
UTC dB Audio Message 003615 -18 1286 9H6C 4Z4DX R-08 003715 -22 1606 GI4SNA 4Z4DX KM72 003730 -6 1606 4Z4DX GI4SNA -20 003730 +0 1455 4Z4DX F4NGR JN33 003800 -3 1606 4Z4DX GI4SNA RR73 003800 -2 1455 4Z4DX F4NGR JN33 003815 -23 1605 GI4SNA 4Z4DX 73 003830 +1 1455 4Z4DX F4NGR JN33 012430 -3 1203 4Z4DX RK4CH -11 191400 +6 1252 4Z4DX TC1TR -12 (x2) 203045 -3 1252 4Z4DX LZ7MM -15 015830 -8 1552 4Z4DX LZ911TD +02 (x2) 020030 -15 2296 4Z4DX R7KKO -19
UTC dB Audio Message 062700 -9 2438 4Z4DX DN9OPA JN38 (x2) 085600 -13 1879 4Z4DX II7MGMU -12 090130 -5 681 TC4ATA 4Z4DX KM72 090445 -10 1194 RT8T 4Z4DX KM72 111600 +2 1027 RK2Y 4Z4DX KM72 113445 -1 983 <...> 4Z4DX KM72
UTC dB Audio Message 041815 +11 594 4Z4DX HB9DBM RR73 042115 -14 1430 4Z4DX IN3IZQ -08 (x10) 191630 -6 605 4Z4DX IQ0AAI -10 (x2) 192200 -14 1003 4Z4DX EH6DSY -10 (x2)
UTC dB Audio Message 172545 -6 951 4Z4DX M7VME -17 (x3) 150915 -18 1388 CT1END/P 4Z4DX KM72 (x2) 083430 -17 635 4Z4DX 8Z1IT -07 030015 -13 885 4Z4DX A61SD -21 (x5) 060330 -17 1579 <...> 4Z4DX KM72 (x3) 122830 -19 1509 IU4SQE 4Z4DX KM72
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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