5Z4VJ — 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 5Z4VJ, decoded by SO8OO in southeastern Poland. 14,309 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 79 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-11-03.
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 14,309 FT8 messages attributed to 5Z4VJ as the transmitting token by decoded message structure across 79 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (73%), followed by 10 m (13%) and 40 m (12%). Most decodes (52%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-11-03 11:14 UTC
Observed FT8 message patterns
- Attributed sample
- 14,309 messages
- Active dates
- 79 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -17 to +5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2,265, moderate (-15 to -9 dB) 5,154, strong (≥ -8 dB) 6,890.
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 5Z4VJ 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 5Z4VJ
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
- KI88 · 8,281 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 5,901 km (approx.)
- Last such locator decoded
- 2026-11-03 11:13 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 | 5Z4VJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-03 11:53 | 10m | - / - | IC8BNR | -18 / - | 2 | Partial capture |
| 11-03 11:48 | 10m | - / -9 | IW8XLD | -11 / - | 4 | ✓ Closing fragment |
| 11-03 11:13 | 10m | -18 / - | SV7LYG | - / - | 2 | ✓ Closing fragment |
| 11-03 07:46 | 10m | -18 / - | UA3SCF | - / -13 | 2 | ✓ Closing fragment |
| 11-03 07:34 | 10m | - / +9 | SQ8DPZ | -20 / - | 2 | ✓ Closing fragment |
| 10-31 23:27 | 40m | - / - | EA6ABF | +10 / - | 4 | Partial capture |
| 10-31 23:26 | 40m | - / -23 | CT2JTN | +3 / - | 10 | Partial capture |
| 10-31 23:23 | 40m | - / -22 | EB3DIM | 0 / - | 2 | Partial capture |
| 10-31 23:20 | 40m | - / - | M9WDW | -8 / - | 6 | Partial capture |
| 10-31 23:19 | 40m | - / - | M0DPK | -12 / - | 5 | Partial capture |
| 10-31 23:18 | 40m | - / -8 | G3FCA | -4 / - | 6 | Partial capture |
| 10-31 23:15 | 40m | - / - | F4NFM | -13 / - | 4 | Partial capture |
| 10-31 23:14 | 40m | - / -5 | ON5UN | -10 / - | 4 | Partial capture |
| 10-31 23:12 | 40m | - / - | M0PFX | -12 / - | 5 | Partial capture |
| 10-31 23:11 | 40m | - / - | MW7RHR | -7 / - | 3 | Partial capture |
| 10-31 23:00 | 40m | - / -24 | IW8RRF | -2 / - | 2 | Partial capture |
| 10-31 22:58 | 40m | - / - | EA1EYG | 0 / - | 2 | Partial capture |
| 10-31 22:57 | 40m | - / - | EB5GIE | -6 / - | 2 | Partial capture |
| 10-31 22:54 | 40m | - / - | EA2ADP | -8 / - | 2 | Partial capture |
| 10-31 17:07 | 40m | - / - | RW3XZ | +4 / - | 5 | Partial capture |
| 10-31 17:04 | 40m | - / - | RW3XZ | +6 / - | 2 | Partial capture |
| 10-31 16:59 | 40m | - / -16 | F4JKT | -12 / - | 4 | Partial capture |
| 10-31 16:45 | 40m | - / - | RW3XZ | +4 / - | 4 | Partial capture |
| 10-31 16:45 | 40m | - / -15 | DL8GAM | -4 / - | 3 | Partial capture |
| 10-31 16:41 | 40m | - / - | RW3XZ | -4 / - | 2 | Partial capture |
| 10-31 16:35 | 40m | - / - | RW3XZ | +2 / - | 2 | Partial capture |
| 10-31 15:55 | 40m | - / - | IZ8EOB | -18 / - | 4 | Partial capture |
| 10-31 15:49 | 40m | - / - | RD7O | -11 / - | 3 | Partial capture |
| 10-31 15:46 | 40m | - / - | DH9DR | +7 / - | 4 | Partial capture |
| 10-31 15:36 | 40m | - / -17 | RC2DT | -9 / - | 3 | Partial capture |
| 10-31 15:33 | 40m | - / -15 | RC2DT | -12 / - | 2 | Partial capture |
| 10-31 15:32 | 40m | - / -5 | SM4UEF | +6 / - | 3 | ✓ Closing fragment |
| 10-30 17:54 | 40m | - / - | LZ4DPB | -12 / - | 2 | Partial capture |
| 10-30 17:48 | 40m | - / - | PD1EN | -10 / - | 3 | Partial capture |
| 10-30 17:48 | 40m | - / - | RU3ACV | -14 / - | 4 | Partial capture |
| 10-30 17:41 | 40m | - / - | RA6OB | -7 / - | 5 | Partial capture |
| 10-29 19:20 | 80m | - / -21 | DO5OT | +23 / - | 7 | Partial capture |
| 10-29 19:19 | 80m | - / - | F4VTR | -9 / - | 2 | Partial capture |
| 10-29 19:18 | 80m | - / - | SV1DKR | -17 / - | 13 | Partial capture |
| 10-29 19:15 | 80m | - / -15 | IZ0DXD | -2 / - | 5 | Partial capture |
| 10-29 19:14 | 80m | - / - | SN9Q | +16 / - | 7 | Partial capture |
| 10-29 19:14 | 80m | - / -21 | DO5OT | +20 / - | 3 | Partial capture |
| 10-29 19:11 | 80m | - / - | IU6KKW | -3 / - | 4 | Partial capture |
| 10-29 19:09 | 80m | - / -18 | R7CD | -7 / - | 2 | Partial capture |
| 10-29 19:09 | 80m | - / - | SQ7BFC | +18 / - | 6 | Partial capture |
| 10-29 19:07 | 80m | - / - | UA9LT | -18 / - | 2 | Partial capture |
| 10-29 19:07 | 80m | - / - | IK1MJL | -4 / - | 3 | Partial capture |
| 10-29 19:06 | 80m | - / - | SV1DKR | -12 / - | 3 | Partial capture |
| 10-29 19:04 | 80m | - / - | IU6KKW | -10 / - | 2 | Partial capture |
| 10-29 19:03 | 80m | - / - | RA3SI | -10 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 073430 -20 2125 5Z4VJ SQ8DPZ RR73 074400 -18 2344 R1BZ 5Z4VJ R-01 074600 -18 2344 UA3SCF 5Z4VJ R-13 (x2) 075115 -19 2344 TA2NEH 5Z4VJ KI88 105945 -18 2344 <...> 5Z4VJ R-12 111115 -18 2344 UA4UK 5Z4VJ KI88 111345 -19 2344 SV7LYG 5Z4VJ KI88 (x2) 114830 -8 1076 5Z4VJ IW8XLD -09 (x4) 115330 -14 1605 5Z4VJ IC8BNR JN60 (x2)
UTC dB Audio Message 192200 -23 1804 5Z4VJ SV1DKR KM18 192200 +4 829 5Z4VJ IK5CHL JN53 192230 -15 1804 5Z4VJ SV1DKR KM18 192230 +6 2452 5Z4VJ IK5CHL JN53 192300 -20 1804 5Z4VJ SV1DKR KM18 192300 -1 2452 5Z4VJ IK5CHL JN53 192330 -15 1804 5Z4VJ SV1DKR KM18 192330 +4 2452 5Z4VJ IK5CHL JN53 192330 +24 2906 5Z4VJ DO5OT JO62 192400 -16 1804 5Z4VJ SV1DKR KM18 192400 +24 2906 5Z4VJ DO5OT JO62 192430 -17 1803 5Z4VJ SV1DKR KM18 192430 +23 2906 5Z4VJ DO5OT JO62 192700 -11 1804 5Z4VJ SV1DKR KM18 044430 -3 1205 5Z4VJ IT9BYL RR73
UTC dB Audio Message 232430 +3 2621 5Z4VJ EB3DIM -21 232630 +4 239 5Z4VJ CT2JTN IN50 232700 +11 2582 5Z4VJ EA6ABF JM19 232700 +5 239 5Z4VJ CT2JTN IN50 232730 +11 2581 5Z4VJ EA6ABF JM19 (x2) 232800 +7 240 5Z4VJ CT2JTN R-23 232830 +10 2581 5Z4VJ EA6ABF JM19 232830 +6 240 5Z4VJ CT2JTN R-23 (x7)
UTC dB Audio Message 215300 +1 1816 5Z4VJ IW8RQA JM88 (x2) 215400 -6 2280 5Z4VJ ON7NQ JO21 215400 -12 1816 5Z4VJ IW8RQA JM88 215430 -3 2280 5Z4VJ ON7NQ JO21 215500 -1 2502 5Z4VJ IW8RQA JM88 (x4) 215630 +4 355 5Z4VJ EI4KF IO54 215700 -11 1774 5Z4VJ YU1LD KN04 (x5)
UTC dB Audio Message 211830 -7 377 5Z4VJ GM0DEQ IO75 (x2) 204345 -1 1065 5Z4VJ IW7EGY JN80 (x2)
UTC dB Audio Message 202815 -2 2369 M3BWF 5Z4VJ KI88 202830 -7 2156 5Z4VJ M3BWF -10 202845 -2 2369 M3BWF 5Z4VJ R-16 202900 +0 2157 5Z4VJ M3BWF RR73 202915 +2 2370 M3BWF 5Z4VJ R-16 202930 +3 2157 5Z4VJ M3BWF RR73 202945 +2 2370 M3BWF 5Z4VJ R-16 203000 +2 2157 5Z4VJ M3BWF RR73 203030 +3 2369 VE3MJM 5Z4VJ KI88 (x5) 203300 +2 2370 JH1GZE 5Z4VJ KI88 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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