WB5XX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM33

Receiver-side FT8 activity involving WB5XX, decoded by SO8OO in southeastern Poland. 1 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-20.

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 1 FT8 messages attributed to WB5XX as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The available sample contains attributed decodes on 20 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

S/N pattern not inferred

Bands

20m · 1

First attributed message: 2026-08-20
Last attributed message: 2026-08-20 21:12 UTC

Observed FT8 message patterns

Attributed sample: 1 messages
Active dates: 1 UTC dates
S/N summary: Too few decodes
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with WB5XX in decoded directed-looking exchanges:

OD5ET · Lebanon ×2 5Z4VJ · Kenya DL3HN · Fed. Rep. of Germany G4UJS · England HB9SZV · Switzerland IK2XDF · Italy ON1JP · Belgium SV5BYP · Dodecanese UT7UJ · Ukraine

Most frequent locator attributed to WB5XX

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: EM33
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,742 km (approx.)
Last such locator decoded: 2026-08-20 21:12 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	WB5XX S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-31 20:26	20m	- / -	EA7ALL	+1 / -	3	Partial capture
08-31 20:20	20m	- / -	EA7ALL	+1 / -	7	Partial capture
08-31 20:20	20m	- / -15	G3BAM	0 / -	3	Partial capture
08-31 20:16	20m	- / -	MI7XHT	-6 / -	2	Partial capture
08-31 20:12	20m	- / -10	F4NBB	-1 / -	5	Partial capture
08-31 20:12	20m	- / -	M9KTM	+1 / -	7	Partial capture
08-31 20:11	20m	- / -	MI7XHT	-11 / -	3	Partial capture
08-30 23:26	40m	- / -	G5TV	-15 / -	2	Partial capture
08-30 22:19	20m	- / -16	7Z1DM	-11 / -	3	Partial capture
08-30 22:17	20m	- / -	KS4OT	-9 / -	4	Partial capture
08-30 22:12	20m	- / -1	5Z4VJ	-9 / -	6	✓ Closing fragment
08-30 14:04	20m	- / -18	G4UJS	+10 / -	3	✓ Closing fragment
08-30 13:51	20m	- / -	GW0NPL	-7 / -	3	Partial capture
08-30 06:59	40m	- / -	ON3CCM	-16 / -	3	Partial capture
08-30 06:52	40m	- / -	ON3CCM	-14 / -	6	Partial capture
08-29 01:42	60m	- / -	US2YW	+2 / -	3	Partial capture
08-29 01:40	60m	- / -	YO6LM	+2 / -	4	Partial capture
08-29 01:39	60m	- / -	IT9VCE	-6 / -	6	Partial capture
08-29 00:54	40m	- / -	PA1PXL	-6 / -	3	Partial capture
08-29 00:52	40m	- / -18	ON1JP	-16 / -	3	Partial capture
08-29 00:50	40m	- / -	DJ0MAB	+2 / -	8	Partial capture
08-20 21:44	20m	- / +9	M0SLI	-13 / -	2	Partial capture
08-20 21:41	20m	- / +4	K1CXS	-2 / -	3	Partial capture
08-20 21:38	20m	- / -	PD4PMS	-4 / -	5	Partial capture
08-20 21:38	20m	- / -	IK4LZH	-4 / -	3	Partial capture
08-20 21:31	20m	- / -	G0RVY	-14 / -	2	Partial capture
08-20 21:31	20m	- / -	PD4PMS	-4 / -	2	Partial capture
08-20 21:31	20m	- / -	TA3NK	+1 / -	2	Partial capture
08-20 21:30	20m	- / -	HB9SKP	-8 / -	4	Partial capture
08-20 21:22	20m	- / -	DC5RE	-11 / -	2	Partial capture
08-20 21:22	20m	- / -	IK4LZH	-9 / -	3	Partial capture
08-20 21:19	20m	- / -15	OD5ET	+13 / -	3	✓ Closing fragment
08-20 21:18	20m	- / -	IK4LZH	0 / -	2	Partial capture
08-20 21:12	20m	- / -	TA3NK	-1 / -	2	Partial capture
08-20 21:01	20m	- / -5	UT7UJ	+22 / -	2	✓ Closing fragment
08-20 20:58	20m	- / -18	IS0KNG	-2 / -	8	Partial capture
08-20 20:58	20m	- / -	PA4RFS	-11 / -	16	Partial capture
08-19 23:18	20m	- / -	EA7LGM	+17 / -	9	Partial capture
08-19 23:12	20m	- / -	EA7LGM	+17 / -	3	Partial capture
08-19 23:12	20m	- / -8	DL3HN	-2 / -	7	✓ Closing fragment
08-14 22:49	20m	- / -5	SV5BYP	-16 / -	4	✓ Closing fragment
08-11 21:40	20m	- / -	PE1ALU	-12 / -	2	Partial capture
08-11 21:37	20m	- / -	DL4KSD	-6 / -	2	Partial capture
08-11 21:37	20m	- / -	PD0RCQ	-1 / -	5	Partial capture
08-11 21:33	20m	- / -	EC5M	-5 / -	6	Partial capture
08-11 21:33	20m	- / -	IK4LZH	-6 / -	3	Partial capture
08-11 21:31	20m	- / -15	F1ODM	-8 / -	3	Partial capture
08-11 21:30	20m	- / -	EA1FUB	-13 / -	4	Partial capture
08-11 21:26	20m	- / -6	HB9SZV	-5 / -	3	✓ Closing fragment
07-28 09:43	20m	- / -	DL1R	0 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
201730 +11  921  WB5XX F4NBB -10
201945 -11  923  WB5XX IT9CCB JM77
202015  -1  574  WB5XX G3BAM -15 (x2)
202045  -6  921  WB5XX EA7ALL IM88
202115  -1  575  WB5XX G3BAM -15
202115  -3  921  WB5XX EA7ALL IM88 (x9)

40m

UTC    dB Audio  Message
005445 -11 2116  WB5XX PA1PXL JO21 (x2)
011230  -6 1291  WB5XX RJ6L KN97
065200 -11 1251  WB5XX ON3CCM JO10 (x6)
065530 -18  904  WB5XX F1PSX JN08
065930 -16 1251  WB5XX ON3CCM JO10 (x3)
232615 -16 1852  WB5XX G5TV IO93 (x2)

60m

UTC    dB Audio  Message
013900  -5  844  WB5XX IT9VCE JM77 (x3)
014030  +1 2195  WB5XX YO6LM KN25
014030  -6  844  WB5XX IT9VCE JM77
014100  +0 2195  WB5XX YO6LM KN25
014200  +0 1029  WB5XX US2YW KN28
014230  +5 2195  WB5XX YO6LM KN25
014230  +3 1029  WB5XX US2YW KN28
014230  -7  844  WB5XX IT9VCE JM77
014300  +4 2195  WB5XX YO6LM KN25
014300  +4 1029  WB5XX US2YW KN28
014300  -5  844  WB5XX IT9VCE JM77

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