4Z5NN — 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 4Z5NN, decoded by SO8OO in southeastern Poland. 898 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 30 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-11-06.
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 898 FT8 messages attributed to 4Z5NN as the transmitting token by decoded message structure across 30 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (74%), followed by 80 m (11%) and 60 m (9%). Most decodes (65%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (60%); the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-11-06 07:46 UTC
Observed FT8 message patterns
- Attributed sample
- 898 messages
- Active dates
- 30 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -15.7 to -0.1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 91, moderate (-15 to -9 dB) 265, strong (≥ -8 dB) 542.
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 4Z5NN 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 4Z5NN
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 · 514 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,325 km (approx.)
- Last such locator decoded
- 2026-11-06 07:46 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 | 4Z5NN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-06 07:44 | 10m | +7 / - | IT9LPO | - / -6 | 2 | ✓ Closing fragment |
| 11-06 07:43 | 10m | +4 / - | DO3NN | - / -13 | 2 | ✓ Closing fragment |
| 11-06 07:41 | 10m | +6 / - | JA5XAE | - / -13 | 2 | ✓ Closing fragment |
| 11-06 07:40 | 10m | +6 / - | UB3BCT | - / -8 | 2 | ✓ Closing fragment |
| 11-06 07:35 | 10m | -8 / - | <...> | - / -14 | 3 | Partial capture |
| 11-06 05:35 | 40m | - / - | PD8HUB | 0 / - | 7 | Partial capture |
| 11-06 05:32 | 40m | - / -15 | F5OEQ | -10 / - | 2 | Partial capture |
| 11-06 05:19 | 40m | - / - | F6FDY | -10 / - | 3 | Partial capture |
| 11-06 05:18 | 40m | -12 / - | RA6FTH | -15 / -13 | 4 | ✓ Closing observed |
| 11-06 05:17 | 40m | - / - | G8GRG | -8 / - | 2 | Partial capture |
| 11-06 05:10 | 40m | -6 / - | W5AJ | - / -18 | 3 | ✓ Closing fragment |
| 11-06 05:05 | 40m | -9 / - | K0FLY | - / -18 | 4 | ✓ Closing fragment |
| 11-06 05:02 | 40m | -11 / - | K0SRL | - / -13 | 3 | ✓ Closing fragment |
| 11-02 15:43 | 80m | - / - | DO5ALO | +6 / - | 2 | Partial capture |
| 11-02 15:36 | 80m | - / -14 | YO5QDI | +4 / - | 3 | ✓ Closing fragment |
| 11-02 15:35 | 80m | - / -13 | RW3QW | -7 / - | 2 | ✓ Closing fragment |
| 11-01 23:53 | 80m | - / - | OM2WQ | +14 / - | 2 | Partial capture |
| 11-01 23:50 | 80m | - / - | EB5CS | -21 / - | 2 | Partial capture |
| 11-01 23:49 | 160m | - / - | DG5PW | -10 / - | 3 | Partial capture |
| 11-01 23:45 | 80m | -8 / -4 | LA4NM | -6 / -20 | 3 | ✓ Full exchange observed |
| 11-01 23:44 | 80m | - / - | DG5PW | -7 / - | 4 | Partial capture |
| 11-01 23:41 | 80m | - / -13 | ON8FAB | -8 / - | 5 | Partial capture |
| 11-01 23:39 | 80m | - / - | R4FDK | -8 / - | 4 | Partial capture |
| 11-01 23:36 | 80m | - / - | 9A2WA | -12 / - | 4 | Partial capture |
| 11-01 23:35 | 80m | - / -15 | UA3IAP | +3 / - | 3 | ✓ Closing fragment |
| 11-01 23:33 | 80m | - / - | DO1OAS | +2 / - | 4 | Partial capture |
| 11-01 23:25 | 80m | - / -14 | DN2MM | +6 / - | 3 | Partial capture |
| 11-01 23:25 | 80m | - / -2 | IK4TVP | 0 / - | 5 | Partial capture |
| 11-01 23:22 | 80m | -7 / -20 | DO3OK | -5 / -18 | 7 | ✓ Full exchange observed |
| 11-01 23:22 | 80m | -6 / -7 | OT1V | -4 / -18 | 9 | ✓ Full exchange observed |
| 11-01 23:19 | 80m | -8 / - | F4FCH | - / -12 | 2 | ✓ Closing fragment |
| 11-01 23:18 | 80m | - / - | DL9KM | 0 / - | 6 | Partial capture |
| 11-01 23:18 | 80m | -8 / -18 | G8OO | -2 / -17 | 5 | ✓ Full exchange observed |
| 11-01 23:17 | 80m | - / - | DO1OAS | +2 / - | 3 | Partial capture |
| 11-01 23:16 | 80m | - / -14 | F1PBZ | +10 / - | 3 | Partial capture |
| 11-01 23:15 | 80m | -10 / -9 | YT1DDL | -2 / -15 | 4 | ✓ Full exchange observed |
| 11-01 20:53 | 80m | - / - | US7UK | +6 / - | 2 | ✓ Closing fragment |
| 11-01 20:49 | 80m | - / -17 | SP9YGD | +5 / - | 3 | ✓ Closing fragment |
| 11-01 20:48 | 80m | - / - | OE1SSA | -2 / - | 2 | Partial capture |
| 11-01 20:46 | 80m | - / - | SP9YGD | +4 / - | 2 | Partial capture |
| 11-01 20:38 | 80m | - / - | HF5A | +11 / - | 3 | Partial capture |
| 10-31 03:56 | 80m | - / - | ON8WR | -9 / - | 3 | Partial capture |
| 10-31 03:55 | 80m | - / - | 9A2WA | -18 / - | 5 | Partial capture |
| 10-31 03:55 | 80m | - / - | DO1OAS | -8 / - | 4 | Partial capture |
| 10-31 03:52 | 80m | - / - | YO8XFU | -16 / - | 3 | Partial capture |
| 10-31 03:47 | 80m | - / - | DL6LG | -14 / - | 3 | Partial capture |
| 10-31 03:46 | 80m | -3 / -6 | F4CTJ | +6 / -16 | 9 | ✓ Full exchange observed |
| 10-31 03:46 | 80m | - / -10 | SP9YGD | +11 / - | 3 | ✓ Closing fragment |
| 10-31 03:44 | 80m | - / -14 | 9A6KBQ | +6 / - | 2 | ✓ Closing fragment |
| 10-31 03:44 | 80m | - / -6 | F1PBZ | +14 / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 073715 -11 1200 <...> 4Z5NN R-14 073945 +6 687 JH7NVJ 4Z5NN RR73 074015 +2 687 CQ 4Z5NN KM71 074045 +7 687 UB3BCT 4Z5NN -08 (x2) 074145 +6 687 JA5XAE 4Z5NN -13 (x2) 074245 +0 687 CQ 4Z5NN KM71 074315 +1 687 DO3NN 4Z5NN -13 (x2) 074415 +2 687 CQ 4Z5NN KM71 074445 +6 687 IT9LPO 4Z5NN R-06 (x2) 074615 +5 687 HA8HA 4Z5NN RR73 074645 -1 686 CQ 4Z5NN KM71
UTC dB Audio Message 052045 -12 555 CQ 4Z5NN KM71 (x2) 053230 -11 635 4Z5NN F5OEQ R-15 (x2) 053500 -1 1542 4Z5NN PD8HUB JO21 (x3) 053600 -4 1110 4Z5NN F4ELU RR73 053630 +2 1542 4Z5NN PD8HUB JO21 053700 -11 1771 4Z5NN RJ3DC KO95 053700 +5 1542 4Z5NN PD8HUB JO21 (x3) 054015 -14 603 CQ 4Z5NN KM71 (x2)
UTC dB Audio Message 235200 -2 594 CQ 4Z5NN KM71 (x3) 235345 +14 1279 4Z5NN OM2WQ JN88 (x2) 153500 -13 737 4Z5NN RX7O RR73 153530 -8 1200 4Z5NN RW3QW -13 (x2) 153630 +4 1045 4Z5NN YO5QDI KN17 (x3) 153815 -10 500 CQ 4Z5NN KM71 (x2) 154300 +7 500 4Z5NN DO5ALO JN68 (x2)
UTC dB Audio Message 234915 -8 594 4Z5NN DG5PW JO30 (x3)
UTC dB Audio Message 211330 +11 528 4Z5NN OZ6P R-13 211345 -8 528 OZ6P 4Z5NN RR73 211400 +12 528 4Z5NN OZ6P 73 211415 -7 528 CQ 4Z5NN KM71 211430 +7 2689 4Z5NN HB9PLH -15 211445 -5 528 HB9PLH 4Z5NN R-17 211500 +0 2689 4Z5NN HB9PLH RR73 211515 -8 528 HB9PLH 4Z5NN 73 211545 -3 528 SP9HAB 4Z5NN -16 211600 -7 1614 4Z5NN ER1CW KN47 211615 -7 528 SP9HAB 4Z5NN RR73 211645 -5 528 ER1CW 4Z5NN -09 211700 -14 1614 4Z5NN ER1CW R-03 211715 -8 528 ER1CW 4Z5NN RR73 211730 -13 1614 4Z5NN ER1CW 73
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.
Explore CW reception at SO8OOFT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee