KO4O — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM64

Receiver-side FT8 activity involving KO4O, decoded by SO8OO in southeastern Poland. 42 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-28.

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 42 FT8 messages attributed to KO4O as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

42
Messages attributed
6
UTC dates decoded
13
Active 15-min windows
-15 dB
Estimated median S/N

Bands

20m · 42
First attributed message: 2026-06-09
Last attributed message: 2026-08-28 01:01 UTC

Observed FT8 message patterns

Attributed sample
42 messages
Active dates
6 UTC dates
Estimated median S/N
-15 dB
Estimated 10th-90th percentile
-20 to -12 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 22, strong (≥ -8 dB) 0.

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 KO4O in decoded directed-looking exchanges:

Most frequent locator attributed to KO4O

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
EM64 · 38 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,314 km (approx.)
Last such locator decoded
2026-08-28 01:01 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 UTCBandKO4O S/NCounterpartCounterpart S/NMsgsCapture
09-08 05:50 80m - / -17 F4UJU -18 / - 10 ✓ Closing fragment
08-28 19:44 20m - / -2 K1CXW -17 / - 3 Partial capture
08-28 02:52 20m - / -20 9K2MP -13 / - 2 Partial capture
08-28 00:58 20m -18 / - CE1JS - / - 7 Partial capture
08-28 00:44 20m -21 / - S57TW - / - 4 Partial capture
08-27 13:23 20m - / -25 F6ARS -2 / - 3 ✓ Closing fragment
08-27 01:45 20m - / -15 XQ1KK -5 / - 5 Partial capture
08-24 21:18 20m - / - EA7KVL -13 / - 4 Partial capture
08-20 23:57 20m - / -14 7Z1BQ -10 / - 3 Partial capture
08-20 00:48 20m - / -13 F1PBZ +1 / - 4 Partial capture
08-08 22:03 20m - / -18 EB7HQE 0 / - 2 Partial capture
08-05 21:50 20m - / -15 DL6MRM -6 / - 3 ✓ Closing fragment
08-05 05:36 40m - / - LX1NO -20 / - 5 Partial capture
08-02 04:55 40m - / -16 DF7FZ -3 / - 5 ✓ Closing fragment
08-02 04:42 40m - / - F4DIA -14 / - 4 Partial capture
08-02 04:42 40m - / 0 DF8RU -7 / - 6 Partial capture
08-02 04:30 40m - / - DH5BM -9 / - 9 Partial capture
08-02 04:10 40m - / - DF3MC -5 / - 10 Partial capture
08-02 04:09 40m - / -4 PA2AT -16 / - 2 ✓ Closing fragment
07-28 03:26 40m - / - M0LEX -19 / - 2 Partial capture
07-18 00:39 20m - / -17 KE4EB -15 / - 4 Partial capture
07-16 00:22 20m - / -14 5B4AMM -20 / - 2 ✓ Closing fragment
07-13 05:26 40m - / -24 OE9DAI -10 / - 9 Partial capture
07-13 05:13 40m - / - OE9DAI -14 / - 4 Partial capture
07-13 04:24 40m - / -22 OK1XD 0 / - 4 ✓ Closing fragment
07-13 04:20 40m - / -25 IU0NAD -16 / - 4 Partial capture
07-13 04:16 40m - / - IU0NAD -16 / - 2 Partial capture
07-13 04:12 40m - / - OK1UG +1 / - 4 Partial capture
07-13 03:48 40m - / - YO9IAB -6 / - 2 Partial capture
07-13 03:43 40m - / -13 IQ4JO -19 / - 3 ✓ Closing fragment
07-13 03:40 40m - / -15 DG1KPC -14 / - 2 ✓ Closing fragment
07-13 03:32 40m - / -24 IQ4JO -16 / - 3 Partial capture
07-13 02:16 20m - / -19 RA6MQ -14 / - 2 ✓ Closing fragment
07-11 02:20 20m - / - DL1R 0 / - 3 Partial capture
07-10 00:59 20m - / - EB4DMH -12 / - 2 ✓ Closing fragment
07-07 04:41 40m - / - DF3MC -12 / - 8 Partial capture
07-07 04:15 40m - / -15 F4LNM -15 / - 3 Partial capture
07-04 03:23 40m - / -5 TM2WWA -16 / - 2 ✓ Closing fragment
06-30 01:02 20m - / - DL1R +1 / - 5 Partial capture
06-29 21:58 20m - / -13 DK2LG -5 / - 4 Partial capture
06-29 04:41 20m - / -11 M9VVE -5 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
044445 -14 1246  KO4O F4DIA JN36
044445  -5 1534  KO4O DF8RU R+00
044615 -15 1214  KO4O OZ1HYM RR73
045545  -3  868  KO4O DF7FZ JN48 (x5)
053630 -18 1584  KO4O LX1NO JN39 (x5)
053400  -3 2839  KO4O EA5IT IM99
014445  -5  658  KO4O KP4LCA -13
80m 
UTC    dB Audio  Message
055000 -20 1401  KO4O F4UJU JN06 (x10)
20m 
UTC    dB Audio  Message
004615 -20 1315  S57TW KO4O EM64
005800 -17 1314  CE1JS KO4O EM64 (x7)
025200 -17 1081  KO4O 9K2MP -20 (x2)
175000 -13  816  KO4O EA8DOY -16
184230 -24 1428  KO4O K1CXW -07 (x4)

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