IZ3ZMC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN55

Receiver-side FT8 activity involving IZ3ZMC, decoded by SO8OO in southeastern Poland. 31 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-11.

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 31 FT8 messages attributed to IZ3ZMC as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (61%), followed by 20 m (23%) and 10 m (16%). Several six-hour UTC windows tied for the largest share (52%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

31
Messages attributed
12
UTC dates decoded
16
Active 15-min windows
-8 dB
Estimated median S/N

Bands

40m · 19 20m · 7 10m · 5
First attributed message: 2026-06-08
Last attributed message: 2026-09-11 18:34 UTC

Observed FT8 message patterns

Attributed sample
31 messages
Active dates
12 UTC dates
Estimated median S/N
-8 dB
Estimated 10th-90th percentile
-18 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 16.

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 IZ3ZMC 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 IZ3ZMC

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
JN55 · 4 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
945 km (approx.)
Last such locator decoded
2026-09-11 18:34 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 UTCBandIZ3ZMC S/NCounterpartCounterpart S/NMsgsCapture
09-11 18:34 40m -12 / -2 F1UNR -6 / - 7 Partial capture
09-06 05:15 40m - / - PE1NPS -4 / - 3 Partial capture
09-06 05:12 40m -8 / - Z62NS -6 / -6 4 ✓ Full exchange observed
09-06 05:02 40m -7 / - J88IH - / -18 3 Partial capture
09-06 04:59 40m -8 / - PV8AJ - / -12 2 ✓ Closing fragment
09-02 16:58 40m -13 / -3 DL3EBJ -2 / -3 7 Partial capture
09-02 01:00 40m - / -11 4X1UF +3 / - 2 ✓ Closing fragment
08-30 06:56 20m - / -10 TF5B -11 / - 3 ✓ Closing fragment
08-29 07:28 20m -13 / - EB1DJ - / -7 2 ✓ Closing fragment
08-29 05:40 20m - / -7 YO4GIY -7 / - 2 Partial capture
07-10 00:05 40m - / -6 5B4AMM +2 / - 2 ✓ Closing fragment
07-09 23:58 40m -4 / - 4L7T - / -14 2 ✓ Closing fragment
07-04 05:29 20m - / -6 F6HUK -8 / - 2 Partial capture
07-04 05:12 20m - / -6 F6HUK -16 / - 5 Partial capture
07-03 04:24 20m - / -17 EA1FAC -8 / - 2 Partial capture
07-03 04:23 20m - / -8 SV5BYP -3 / - 3 Partial capture
06-28 15:59 10m -8 / - PW8BR - / -15 2 Partial capture
06-26 21:03 40m - / -17 IQ7KM -14 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
051215  -9 1406  Z62NS IZ3ZMC -06
051230  -5 1405  IZ3ZMC Z62NS R+11
051245  -8 1406  Z62NS IZ3ZMC RR73
051300  -6 1406  IZ3ZMC Z62NS 73
051515  -5 1685  EG9FMS IZ3ZMC RR73
051530  -1 2390  IZ3ZMC PE1NPS JO22 (x3)
183400 -12 2229  F1UNR IZ3ZMC JN55
183415  +0 2229  IZ3ZMC F1UNR -02 (x6)
20m 
UTC    dB Audio  Message
053215  -8 1068  IZ3ZMC F6HUK R-06
042615 -18  979  SQ5OVL IZ3ZMC RR73
151400 -16 1464  OK2MKJ IZ3ZMC -07
053200  -6 1982  IZ3ZMC YO4GIY -11
053915  +3 1703  IZ3ZMC LZ1ZF -16
054030 -10 1982  IZ3ZMC YO4GIY -07 (x3)
072830  -8 1478  EB1DJ IZ3ZMC -07 (x2)
065600 -13 1762  IZ3ZMC TF5B R-10 (x3)
065830  -6 1505  IZ3ZMC ER1CW R-15
070000 -11 1761  TF5B IZ3ZMC -18
10m 
UTC    dB Audio  Message
155900  -6 1772  PW8BR IZ3ZMC -15 (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.

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