4Z1RZ — 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 4Z1RZ, decoded by SO8OO in southeastern Poland. 429 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 54 UTC dates in the available aggregate history. Observed between 2026-06-06 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 429 FT8 messages attributed to 4Z1RZ as the transmitting token by decoded message structure across 54 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (71%), followed by 40 m (12%) and 60 m (10%). Most decodes (73%) fell within the six-hour window 01:00-07:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -4.7 dB.
Overview
Bands
Last attributed message: 2026-11-03 20:13 UTC
Observed FT8 message patterns
- Attributed sample
- 429 messages
- Active dates
- 54 UTC dates
- Estimated median S/N
- -4.7 dB
- Estimated 10th-90th percentile
- -14 to +8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 113, strong (≥ -8 dB) 286.
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 4Z1RZ 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 4Z1RZ
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 · 12 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,224 km (approx.)
- Last such locator decoded
- 2026-11-03 20:12 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 | 4Z1RZ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-03 20:21 | 80m | - / - | DO1MDO | -4 / - | 4 | Partial capture |
| 11-03 20:20 | 80m | - / - | DL9ATW | +7 / - | 2 | Partial capture |
| 11-03 20:20 | 80m | - / - | UX5UO | +8 / - | 2 | Partial capture |
| 11-03 20:19 | 80m | - / -8 | IK1MJK | +2 / - | 2 | ✓ Closing fragment |
| 11-03 20:17 | 80m | - / -13 | UX7QV | -8 / - | 3 | ✓ Closing fragment |
| 11-03 20:17 | 60m | - / - | ON7VN | -14 / - | 2 | Partial capture |
| 11-03 20:15 | 80m | - / -4 | OE8TED | +26 / - | 2 | ✓ Closing fragment |
| 11-03 20:13 | 60m | - / - | DK6AH | -12 / - | 3 | Partial capture |
| 11-03 20:12 | 60m | 0 / - | G0AZH | - / -19 | 2 | ✓ Closing fragment |
| 11-03 20:12 | 60m | - / - | G8OO | +1 / - | 9 | Partial capture |
| 11-03 20:12 | 60m | - / - | DL7ARV | -12 / - | 7 | Partial capture |
| 11-03 20:10 | 60m | - / - | IU1VJP | -14 / - | 4 | Partial capture |
| 11-03 20:09 | 60m | -13 / -4 | SM2LKW | -8 / - | 3 | ✓ Closing observed |
| 11-03 20:09 | 60m | -7 / -13 | VE1YX | -15 / -18 | 7 | ✓ Full exchange observed |
| 11-03 20:07 | 60m | -6 / - | CT1DIZ | -18 / -8 | 3 | ✓ Closing observed |
| 11-01 03:53 | 60m | +10 / - | KZ4NS | - / -14 | 2 | ✓ Closing fragment |
| 11-01 03:51 | 60m | +2 / -13 | 4X1UF | -2 / -18 | 4 | ✓ Full exchange observed |
| 11-01 03:46 | 80m | +2 / +6 | DO1ID | +12 / -13 | 4 | ✓ Full exchange observed |
| 11-01 03:44 | 80m | 0 / -8 | 9A4ZM | +13 / - | 4 | ✓ Closing observed |
| 11-01 03:44 | 80m | - / - | G8OO | -9 / - | 6 | Partial capture |
| 11-01 03:43 | 80m | -1 / - | F4CTJ | - / -14 | 3 | ✓ Closing fragment |
| 10-26 15:17 | 40m | -10 / - | UB6HWF | -10 / - | 4 | ✓ Closing observed |
| 10-26 15:13 | 40m | -14 / - | HL5BMX | - / -16 | 2 | Partial capture |
| 10-25 04:00 | 40m | - / - | F5PBG | -9 / - | 2 | Partial capture |
| 10-25 04:00 | 40m | - / - | F5MXH | +6 / - | 2 | Partial capture |
| 10-25 03:59 | 40m | -2 / - | TJ1GD | - / -16 | 2 | ✓ Closing fragment |
| 10-25 03:57 | 40m | -7 / - | K3VZ | - / -14 | 4 | ✓ Closing fragment |
| 10-25 03:54 | 40m | - / - | UR9QQ | -13 / - | 2 | Partial capture |
| 10-23 04:19 | 80m | -15 / - | 4X1UF | - / +5 | 2 | ✓ Closing fragment |
| 10-23 04:19 | 80m | - / -10 | SV2DCD | +6 / - | 2 | Partial capture |
| 10-23 04:14 | 80m | -22 / -3 | LZ936BA | -12 / -9 | 2 | Partial capture |
| 10-23 04:06 | 80m | -16 / -11 | F1PBZ | +11 / -7 | 5 | ✓ Full exchange observed |
| 10-23 04:03 | 80m | -20 / 0 | E75FM | -11 / -15 | 2 | Partial capture |
| 10-23 04:00 | 80m | -14 / -11 | HB9CXZ | -4 / -15 | 4 | ✓ Full exchange observed |
| 10-23 04:00 | 80m | - / -13 | UT5MB | -1 / - | 4 | ✓ Closing fragment |
| 10-23 03:59 | 80m | -14 / -3 | 9A6OY | +4 / -5 | 3 | ✓ Full exchange observed |
| 10-22 18:53 | 80m | - / - | DK1MCS | +2 / - | 3 | Partial capture |
| 10-22 18:52 | 80m | - / - | LY1DY | +15 / - | 2 | Partial capture |
| 10-22 18:51 | 80m | - / -11 | RU9CK | -13 / - | 2 | Partial capture |
| 10-22 18:51 | 80m | - / - | UR5KC | +4 / - | 3 | Partial capture |
| 10-22 18:49 | 80m | - / -10 | HG0NPJ | +5 / - | 4 | Partial capture |
| 10-22 18:48 | 80m | - / -14 | RX3ASQ | +2 / - | 2 | ✓ Closing fragment |
| 10-22 18:46 | 60m | -11 / 0 | E74K | -14 / -6 | 3 | ✓ Full exchange observed |
| 10-22 18:44 | 60m | - / - | LZ1QV | -6 / - | 2 | Partial capture |
| 10-22 18:44 | 60m | -14 / -12 | ON6LEO | +7 / - | 4 | ✓ Closing observed |
| 10-22 18:42 | 60m | -17 / -7 | EA8AE | -18 / -19 | 5 | ✓ Full exchange observed |
| 10-22 18:38 | 60m | -11 / - | OH3MB | -8 / -9 | 3 | ✓ Closing observed |
| 10-15 22:51 | 40m | - / 0 | F1PBZ | +2 / - | 4 | Partial capture |
| 10-15 22:50 | 40m | - / - | DL3MIB | -2 / - | 7 | Partial capture |
| 10-15 22:50 | 40m | - / - | G6PZ | -7 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 201745 -12 2620 4Z1RZ UX7QV KN29 (x3) 201915 +13 2586 4Z1RZ OE5EYM JN68 201945 -3 2618 4Z1RZ IK1MJK R-08 (x2) 202045 +9 425 4Z1RZ UX5UO KO50 202045 +11 301 4Z1RZ DL9ATW JO61 202115 +6 424 4Z1RZ UX5UO KO50 202115 -12 921 4Z1RZ JA9BFN PM86 202115 -2 1946 4Z1RZ DO1MDO JO50 202145 +3 235 4Z1RZ DL9ATW JO61 202215 -6 1946 4Z1RZ DO1MDO JO50 (x3)
UTC dB Audio Message 201400 -15 1182 4Z1RZ DL7ARV JO62 201400 -11 2419 4Z1RZ DK6AH JN48 201430 +1 642 4Z1RZ G8OO JO02 201430 -13 1181 4Z1RZ DL7ARV JO62 201430 -11 2419 4Z1RZ DK6AH JN48 201500 -4 2666 4Z1RZ IU1VJP JO30 201500 +2 642 4Z1RZ G8OO JO02 201500 -12 1182 4Z1RZ DL7ARV JO62 201530 +1 642 4Z1RZ G8OO JO02 201530 -15 1182 4Z1RZ DL7ARV JO62 201600 +3 642 4Z1RZ G8OO JO02 201600 -6 1182 4Z1RZ DL7ARV JO62 201630 +1 643 4Z1RZ G8OO JO02 201700 -14 695 4Z1RZ ON7VN JO21 (x2)
UTC dB Audio Message 035915 -3 603 TJ1GD 4Z1RZ -16 (x2) 040000 +9 604 4Z1RZ F5MXH JN07 040015 -6 887 K3VZ 4Z1RZ 73 040030 -10 937 4Z1RZ F5PBG IN78 040030 +4 604 4Z1RZ F5MXH JN07 040100 -8 937 4Z1RZ F5PBG IN78 040130 -3 2545 KP3U 4Z1RZ -18 151345 -13 2525 HL5BMX 4Z1RZ -16 (x3) 151730 -10 2628 4Z1RZ UB6HWF LN04 (x3) 151945 -10 2628 UB6HWF 4Z1RZ RR73
UTC dB Audio Message 040100 -6 2009 K7ZV 4Z1RZ -15 (x4) 055915 +14 993 4Z1RZ IZ8EYN -06 (x7) 060500 +7 477 DL1TJ 4Z1RZ -11 (x4)
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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