4Z4MU — 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 4Z4MU, decoded by SO8OO in southeastern Poland. 380 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 49 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-11-01.
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 380 FT8 messages attributed to 4Z4MU as the transmitting token by decoded message structure across 49 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (44%), followed by 20 m (43%) and 40 m (13%). The busiest six-hour window was 18:00-00:00 UTC, containing 44% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.
Overview
Bands
Last attributed message: 2026-11-01 02:44 UTC
Observed FT8 message patterns
- Attributed sample
- 380 messages
- Active dates
- 49 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -21 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 117, moderate (-15 to -9 dB) 168, strong (≥ -8 dB) 95.
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 4Z4MU 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 4Z4MU
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 · 12 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,325 km (approx.)
- Last such locator decoded
- 2026-10-28 18:16 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 | 4Z4MU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-01 02:33 | 80m | -13 / -8 | DL3MIB | +16 / - | 4 | ✓ Closing observed |
| 11-01 02:31 | 80m | - / -22 | KO1K | -7 / - | 4 | ✓ Closing fragment |
| 10-28 23:58 | 80m | -11 / -9 | ON8WR | +6 / -15 | 6 | ✓ Full exchange observed |
| 10-28 23:58 | 80m | -15 / - | TA1MB | -8 / -16 | 4 | ✓ Closing observed |
| 10-28 23:57 | 80m | -22 / -8 | IK6GTF | +3 / -11 | 13 | ✓ Full exchange observed |
| 10-28 23:55 | 80m | -12 / -9 | DJ8KM | +3 / -21 | 13 | ✓ Full exchange observed |
| 10-28 23:53 | 80m | -12 / -22 | TF4M | -3 / -17 | 5 | ✓ Full exchange observed |
| 10-28 23:43 | 80m | -6 / - | TF4M | - / -17 | 4 | Partial capture |
| 10-28 23:28 | 40m | -10 / -19 | HI8J | -10 / -21 | 4 | ✓ Full exchange observed |
| 10-28 23:21 | 80m | - / - | F5MXH | -8 / - | 2 | Partial capture |
| 10-28 23:20 | 80m | -16 / - | A92AE | - / -9 | 3 | ✓ Closing fragment |
| 10-28 23:17 | 80m | -11 / - | UN0GY | - / -17 | 3 | ✓ Closing fragment |
| 10-28 23:13 | 80m | - / -11 | EA1IOK | -4 / - | 7 | ✓ Closing fragment |
| 10-28 18:29 | 40m | -8 / - | JG3LGD | - / -11 | 2 | Partial capture |
| 10-26 00:39 | 40m | - / -14 | CT7BRV | -7 / - | 2 | ✓ Closing fragment |
| 10-25 23:50 | 80m | -18 / -12 | EA9ADC | -12 / -13 | 9 | ✓ Full exchange observed |
| 10-25 23:41 | 80m | - / -11 | EA7ATM | -7 / - | 3 | ✓ Closing fragment |
| 10-25 23:38 | 80m | - / -5 | CT7AUT | -16 / - | 4 | ✓ Closing fragment |
| 10-25 23:33 | 80m | -16 / -8 | EA8AJ | -8 / - | 3 | ✓ Closing observed |
| 10-25 23:29 | 40m | -18 / - | VO1FE | - / -17 | 2 | Partial capture |
| 10-20 01:34 | 40m | -13 / - | R2EA/M | - / -4 | 2 | Partial capture |
| 10-20 01:31 | 40m | -9 / -13 | KW4BY | -7 / -16 | 6 | ✓ Full exchange observed |
| 10-20 01:28 | 40m | -9 / - | 7P8GE | - / -10 | 3 | Partial capture |
| 10-18 01:44 | 40m | -14 / - | WB4KTF | - / -15 | 3 | Partial capture |
| 10-18 01:10 | 40m | -3 / -15 | HI8ML | +7 / - | 6 | ✓ Full exchange observed |
| 10-18 01:08 | 40m | -18 / - | EY7BM | - / -13 | 3 | Partial capture |
| 10-15 01:51 | 40m | -10 / - | VP2MAW | - / -11 | 3 | Partial capture |
| 10-15 01:48 | 40m | -20 / - | N9TR | - / -20 | 3 | Partial capture |
| 10-15 01:47 | 40m | -14 / - | SP5MXZ | - / -16 | 2 | ✓ Closing fragment |
| 10-15 01:46 | 40m | -16 / -5 | EP2AES | -12 / - | 3 | ✓ Closing observed |
| 10-06 02:14 | 80m | -16 / - | W3DIY | - / -17 | 2 | Partial capture |
| 10-06 02:13 | 80m | -12 / - | SP4DLD | -14 / -16 | 3 | ✓ Closing observed |
| 10-06 02:11 | 80m | -20 / - | KY2J | - / -22 | 2 | Partial capture |
| 10-06 02:02 | 80m | -22 / -14 | OK1JAZ | +6 / -15 | 7 | ✓ Full exchange observed |
| 10-06 02:02 | 80m | -17 / -22 | Z61DX | +2 / -15 | 3 | ✓ Full exchange observed |
| 10-06 01:58 | 80m | - / 0 | LY5A | +10 / - | 2 | ✓ Closing fragment |
| 10-06 01:57 | 80m | - / -14 | EC5M | -7 / - | 2 | ✓ Closing fragment |
| 09-29 18:27 | 80m | - / -20 | HA1BF | +11 / - | 2 | ✓ Closing fragment |
| 09-28 19:03 | 80m | - / -20 | OH3FM | +2 / - | 3 | Partial capture |
| 09-28 18:46 | 40m | -7 / -11 | LB7ZG | 0 / - | 3 | ✓ Full exchange observed |
| 09-28 18:40 | 160m | - / -22 | SV2GJV | +12 / - | 2 | Partial capture |
| 09-28 18:31 | 80m | - / -12 | R6OU | -6 / - | 2 | ✓ Closing fragment |
| 09-22 20:55 | 80m | - / - | SM3ULU | -12 / - | 2 | Partial capture |
| 09-22 20:53 | 80m | - / -2 | IZ7ECL | 0 / - | 2 | Partial capture |
| 09-22 20:51 | 80m | - / -14 | RA1WU | +11 / - | 2 | ✓ Closing fragment |
| 09-22 20:51 | 80m | -20 / -5 | DG3YEV | +9 / -16 | 8 | ✓ Full exchange observed |
| 09-22 20:48 | 80m | -13 / - | F5BZB | - / -8 | 2 | Partial capture |
| 09-22 20:46 | 80m | -15 / - | ZX2LTY | - / -21 | 2 | Partial capture |
| 09-22 19:26 | 80m | -18 / - | R7KKO | - / -21 | 2 | Partial capture |
| 09-22 19:23 | 80m | -3 / - | R4GM | +15 / -12 | 5 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 000145 -21 2379 IK6GTF 4Z4MU -11 000200 +6 1252 4Z4MU IK6GTF R-08 000215 -22 2379 IK6GTF 4Z4MU RR73 000230 +1 1252 4Z4MU IK6GTF 73 023145 -9 301 4Z4MU KO1K R-22 (x4) 023315 +20 1983 4Z4MU DL3MIB JN57 (x2) 023400 -13 313 DL3MIB 4Z4MU RR73 023415 +13 1983 4Z4MU DL3MIB 73 023615 -13 1911 4Z4MU EC3A RR73 024100 -13 919 N2OO 4Z4MU R-11 (x2)
UTC dB Audio Message 000330 -10 469 W1JBD 4Z4MU -20 003945 -6 739 4Z4MU CT7BRV R-14 (x2) 161015 -20 1726 EX7CQ 4Z4MU R-13 162015 -3 2893 A92AE 4Z4MU +02 162415 -18 2342 R6FGF 4Z4MU R-08 181645 -11 903 FK8HA 4Z4MU KM71 182930 -9 2951 JG3LGD 4Z4MU -11 (x2) 183130 -23 1970 JA7YAA 4Z4MU R-17 232415 -17 2225 TN8GD 4Z4MU RR73 232845 -10 2490 HI8J 4Z4MU -21 232900 -9 2480 4Z4MU HI8J R-19 232915 -11 2489 HI8J 4Z4MU RR73 232930 -10 2480 4Z4MU HI8J 73
UTC dB Audio Message 184045 +12 893 4Z4MU SV2GJV R-22 (x2)
UTC dB Audio Message 054145 +0 1101 4Z4MU SV1MOZ KM17 (x3) 054300 -20 1579 SV1MOZ 4Z4MU +13 054315 +3 1100 4Z4MU SV1MOZ KM17 (x2) 195900 -9 1121 CS8ABF 4Z4MU -06 (x2) 200000 -14 1121 K4ZO 4Z4MU -10 200200 -14 1142 W3FOX 4Z4MU -10 (x3) 201445 -6 730 W1AW/2 4Z4MU -16 (x3)
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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