US4EX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Ukraine Locator transmitted in a decoded message: KN78

Receiver-side FT8 activity involving US4EX, decoded by SO8OO in southeastern Poland. 189 related FT8 messages, 1 CQ messages, observed on 80m, 20m, 10m, across 16 UTC dates. Heard between 2026-06-01 and 2026-08-22.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

189
Related messages
1
CQ messages
16
UTC dates heard
-7 dB
Mean decoder S/N

Bands

80m 20m 10m
First seen: 2026-06-01
Last seen: 2026-08-22 22:36 UTC

Frequent QSO partners observed at SO8OO

Stations US4EX worked most often, as logged from our receiver:

Activity Heatmap

Locator transmitted by US4EX

Approximate centre of KN78, decoded 2026-08-23 03:03 UTC. A transmitted locator is not proof of the operator's permanent location.

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 UTCBandUS4EX S/NCounterpartCounterpart S/NMsgsCapture
08-23 00:35 20m - / -17 K1CPJ -10 / - 3 Partial capture
08-22 23:40 20m - / -16 N3YPL 0 / - 3 ✓ Closing fragment
08-22 23:34 20m - / -17 K3STL -6 / - 2 Partial capture
08-22 22:41 20m -14 / - K3ZK - / - 2 Partial capture
08-22 22:36 20m -8 / - K3ZK - / - 2 Partial capture
08-22 22:30 20m -7 / - EA8DNB - / - 3 Partial capture
08-22 22:22 20m -5 / - K3ZK - / - 2 Partial capture
08-22 22:15 20m -6 / - K3ZK - / - 2 Partial capture
08-22 22:08 20m +3 / - KX4DRT - / -7 8 ✓ Closing fragment
08-22 22:07 20m - / - W2BCC -11 / - 4 Partial capture
08-22 22:02 20m -6 / - KD2WRM - / -18 9 ✓ Closing fragment
08-22 21:53 20m -7 / - KR3Y - / - 7 Partial capture
08-22 21:46 20m -9 / - N1SK - / -9 12 Partial capture
08-22 21:42 20m -2 / - BA8BLK - / - 6 Partial capture
08-22 21:35 20m -10 / - N1SK - / - 8 Partial capture
08-22 21:15 20m 0 / - TA3KJ - / - 11 Partial capture
08-22 20:56 20m -3 / -24 CO8LY -15 / -19 27 ✓ Full exchange observed
08-22 20:50 20m 0 / - 9K2KU - / - 8 Partial capture
08-22 20:41 20m -3 / - CO8LY - / - 9 Partial capture
08-22 20:35 20m 0 / - 9K2KU - / -23 11 Partial capture
08-22 20:32 20m +5 / - JE2GEG - / -9 3 ✓ Closing fragment
08-22 20:27 20m 0 / - K0BFG - / -6 10 ✓ Closing fragment
08-22 20:15 20m -6 / - BD8ELZ - / - 10 Partial capture
08-22 20:15 20m - / - EA3AAY -3 / - 4 Partial capture
08-22 20:10 20m -2 / - WV2B - / -6 10 ✓ Closing fragment
08-22 20:05 20m +4 / - TJ1GD - / -11 4 ✓ Closing fragment
08-22 19:50 20m +5 / - TA3KJ - / - 10 Partial capture
08-22 19:44 20m +1 / - D2UY +4 / +2 2 ✓ Closing observed
08-22 19:39 20m -5 / - EX7CQ - / -7 5 Partial capture
08-22 19:36 20m -6 / - EX7CQ - / - 2 Partial capture
08-22 19:34 20m -2 / - TL8GD - / -16 3 ✓ Closing fragment
08-22 19:30 20m -6 / - EA8DOY - / - 4 Partial capture
08-22 19:08 20m +1 / - FG4AO - / - 8 Partial capture
08-22 18:59 20m 0 / - EA8AFB - / - 10 Partial capture
08-22 18:43 20m -2 / - YB2FAJ - / - 8 Partial capture
08-22 18:37 20m -3 / - K0BFG - / - 4 Partial capture
08-19 14:02 10m - / -3 OE4DJN -7 / - 2 ✓ Closing fragment
08-17 11:47 10m -6 / - <...> - / -3 8 Partial capture
08-01 18:51 20m -4 / - BG7WJH - / - 5 Partial capture
08-01 18:45 20m -6 / - BG7WJH - / - 6 Partial capture
08-01 18:39 20m - / -7 GJ0KYZ +1 / - 5 Partial capture
08-01 18:38 20m -4 / - 9J2FI - / -14 3 ✓ Closing fragment
08-01 18:31 20m -14 / - UN3QA - / -12 3 Partial capture
07-25 15:48 10m +10 / - PQ1I - / -7 4 Partial capture
07-19 05:37 20m -12 / - K9STL - / - 5 Partial capture
07-19 05:26 20m -14 / - K9STL - / - 4 Partial capture
07-19 05:17 20m -12 / - K9STL - / - 2 Partial capture
07-19 05:06 20m -5 / - KD3ACB - / -19 4 Partial capture
07-19 04:56 20m -17 / - TA4KO - / - 6 Partial capture
07-19 04:08 20m - / -12 TA9MEB -20 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
223145  -7 1574  EA8DNB US4EX KN78
223645  -6 1283  K3ZK US4EX KN78 (x4)
224345 -14 1284  HC7AE US4EX KN78
233400  -6  874  US4EX K3STL -17 (x2)
234000  -1 2504  US4EX N3YPL -16 (x3)
003500  -8 2554  US4EX K1CPJ -17 (x3)
030330  -7 1957  8Z1IT US4EX KN78
10m 
UTC    dB Audio  Message
155045  +8 2543  PQ1I US4EX R-07
114415 -11  905  <...> US4EX KN78 (x9)
115245 -11 2623  CT2KCK US4EX -12
130030 -24 1435  <...> US4EX KN78
142215  -4  632  YE1AJE US4EX KN78
140215  -6  420  US4EX OE4DJN -03 (x2)
80m 
UTC    dB Audio  Message
172945 -15 1683  VJ2L US4EX KN78 (x8)
173430 -10 1938  US4EX DK7ZT -14 (x3)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.