S55X — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovenia Most frequent locator attributed to this token: JN76

Receiver-side FT8 activity involving S55X, decoded by SO8OO in southeastern Poland. 13,828 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 60 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-06.

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 13,828 FT8 messages attributed to S55X as the transmitting token by decoded message structure across 60 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (75%), followed by 20 m (13%) and 40 m (12%). Most decodes (51%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -4 dB.

Overview

13,828

Messages attributed

UTC dates decoded

870

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 10,325 40m · 1,675 20m · 1,828

First attributed message: 2026-06-08
Last attributed message: 2026-10-06 05:24 UTC

Observed FT8 message patterns

Attributed sample: 13,828 messages
Active dates: 60 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -17.8 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,918, moderate (-15 to -9 dB) 2,295, strong (≥ -8 dB) 9,615.

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 S55X in decoded directed-looking exchanges:

F1PBZ · France ×3 IZ5RKH · Italy ×3 IK4LZH · Italy ×2 DL1FAM · Fed. Rep. of Germany ×2 F6HRP · France ×2 HB9ELE · Switzerland ×2 IV3DSG · Italy ×2 IW0FGX · Italy ×2 R5AV · European Russia ×2 DG5PW · Fed. Rep. of Germany ×2 HA7JDU · Hungary ×2 SO1O · Poland ×2

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 S55X

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: JN76 · 13,352 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 631 km (approx.)
Last such locator decoded: 2026-10-06 05:24 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	S55X S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-06 05:24	80m	- / -11	YO3YX	-12 / -	2	Partial capture
10-06 05:22	80m	- / -	YT3MD	-4 / -	3	Partial capture
10-06 04:46	80m	- / -	DO5PY	-7 / -	5	Partial capture
10-06 04:46	80m	- / -	SP3TD	-14 / -	2	Partial capture
10-06 04:29	80m	-1 / +5	F4NGR	-10 / -18	5	✓ Full exchange observed
10-06 04:21	80m	- / -	SQ2BXI	-20 / -	2	Partial capture
10-06 04:07	80m	- / -23	YO4GOU	-8 / -	2	Partial capture
10-06 03:40	80m	- / -8	HB9AWS	+1 / -	4	✓ Closing fragment
10-06 03:34	80m	+5 / -6	DO1FHQ	0 / -15	9	✓ Full exchange observed
10-06 03:22	80m	-2 / -	YO5OAI	- / -15	2	✓ Closing fragment
10-06 02:26	80m	-7 / +1	DL4DP	-6 / -19	7	✓ Full exchange observed
10-06 02:12	80m	- / -	DL4DP	-13 / -	2	Partial capture
10-06 01:55	80m	- / -	YO6DBA	-5 / -	3	Partial capture
10-06 01:09	80m	- / -	ON4MAP	-17 / -	5	Partial capture
10-05 17:40	80m	- / -	RK4F	0 / -	2	Partial capture
10-05 05:41	80m	- / -	DG5PW	-17 / -	5	Partial capture
10-05 05:40	80m	- / -	DK3WL	-12 / -	4	Partial capture
10-05 05:26	80m	- / -	DK3MM	-5 / -	6	Partial capture
10-05 05:26	80m	- / -	EA1AHP	-21 / -	3	Partial capture
10-05 05:16	80m	- / -	HA9OA	+5 / -	3	Partial capture
10-05 05:14	80m	- / -	SM5CBM	+2 / -	2	Partial capture
10-05 05:13	80m	- / -	DK3WL	-14 / -	2	Partial capture
10-05 04:54	80m	- / -	DO1FZL	-1 / -	3	Partial capture
10-05 04:50	80m	- / -	SP3TD	-2 / -	2	Partial capture
10-05 04:26	80m	- / -	OM8BCD	-1 / -	2	✓ Closing fragment
10-05 04:09	80m	0 / +3	IQ2AAH	-6 / -16	5	✓ Full exchange observed
10-05 04:04	80m	- / -	DO5PY	-13 / -	3	Partial capture
10-05 04:04	80m	- / -	M7KEV	-8 / -	11	Partial capture
10-05 03:31	80m	- / -	DL3HN	-7 / -	7	Partial capture
10-05 03:25	80m	- / -	CT2GQA	-15 / -	3	Partial capture
10-05 03:18	80m	- / -	DL9KV	+1 / -	3	Partial capture
10-05 03:10	80m	- / -	DL3HN	-9 / -	2	Partial capture
10-05 03:09	80m	- / -	CT2GQA	-18 / -	6	Partial capture
10-05 03:00	80m	- / -	CT2GQA	-17 / -	5	Partial capture
10-05 02:52	80m	- / -	CT2GQA	-8 / -	5	Partial capture
10-05 02:46	80m	- / +3	DL1VVQ	+4 / -	2	Partial capture
10-05 02:46	80m	- / -23	OH6IH	-13 / -	2	Partial capture
10-05 02:44	80m	- / -	SV8TOZ	-1 / -	2	Partial capture
10-05 02:32	80m	- / -	RA6Z	-12 / -	2	Partial capture
10-05 02:20	80m	- / -13	R6ZB	-6 / -	3	Partial capture
10-05 02:09	80m	- / -3	SM7WNM	-1 / -	2	Partial capture
10-05 02:08	80m	- / -13	OH6IH	-8 / -	2	Partial capture
10-05 02:00	80m	- / -	YO5CN	-11 / -	2	Partial capture
10-05 01:55	80m	- / -5	SM7WNM	-2 / -	2	Partial capture
10-05 01:34	80m	- / -	F6FHZ	-19 / -	3	Partial capture
10-05 01:22	80m	- / -	EI3CTB	-8 / -	15	Partial capture
10-05 01:18	80m	- / -	G7OOD	0 / -	2	Partial capture
10-05 01:15	80m	- / -	F6FHZ	-20 / -	4	Partial capture
10-05 01:04	80m	- / -	IU5SCG	-7 / -	5	Partial capture
10-05 00:47	80m	+2 / -1	SP7CS	+7 / -13	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
050915  -4 1508  CQ S55X JN76 (x8)
052230 -12 1508  S55X YT3MD KN04 (x3)
052400 -15 1746  S55X YO3YX -11
052415  -2 1507  CQ S55X JN76
052430 -10 1746  S55X YO3YX -05
052445  -2 1507  CQ S55X JN76

60m

UTC    dB Audio  Message
044100 -19 1537  S55X EA3CUU JN12
233100 -15 1537  S55X DG5PW JO30 (x4)
181130 -22 1540  S55X IU1XBD JN35
212930  -8 1537  S55X DG5PW JO30 (x4)

160m

UTC    dB Audio  Message
192330 -11 1500  S55X DK7ZT -01 (x5)
003430  +6  815  S55X R7CD KN94 (x3)
183900 +12 1002  S55X 9A5AGY JN65 (x2)

40m

UTC    dB Audio  Message
221930  -8 2346  S55X RD3FY KO85 (x3)
230000  -8 1026  S55X G5IAN -07 (x2)
231200 -23 1765  S55X GX7RAF/P IO91 (x2)
232930 -13 1678  S55X GM0OPS IO75 (x3)
004900 -24 1542  S55X EA2DYB R-05
050845 -17 1544  CQ S55X JN76 (x4)

20m

UTC    dB Audio  Message
233130  -8 1568  CQ S55X JN76 (x9)
062700 -22 1442  S55X EA3RO JN11 (x3)
064000  -5 1570  S55X F1ROA JN05 (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.

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