S56UVB — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving S56UVB, decoded by SO8OO in southeastern Poland. 1,905 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-15.

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 1,905 FT8 messages attributed to S56UVB as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 40 m (21%) and 80 m (4%). Most decodes (100%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (84%); the estimated median was +1.3 dB.

Overview

1,905

Messages attributed

UTC dates decoded

152

Active 15-min windows

+1.3 dB

Estimated median S/N

Bands

80m · 79 40m · 397 20m · 1,415 10m · 14

First attributed message: 2026-06-06
Last attributed message: 2026-09-15 21:08 UTC

Observed FT8 message patterns

Attributed sample: 1,905 messages
Active dates: 28 UTC dates
Estimated median S/N: +1.3 dB
Estimated 10th-90th percentile: -11 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 71, moderate (-15 to -9 dB) 230, strong (≥ -8 dB) 1,604.

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 S56UVB in decoded directed-looking exchanges:

EA4IVO · Spain ×2 M0LHJ · England ×2 ON5LC · Belgium ×2 UA4FKT · European Russia ×2 2E0DGP · England 5B4ARQ · Cyprus 7Z1BQ · Saudi Arabia 9J2FI · Zambia BA4IAW · China BG7MOM · China BG7ZHS · China BG8HNC · China

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 S56UVB

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 · 1,206 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 631 km (approx.)
Last such locator decoded: 2026-09-15 21:06 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	S56UVB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 21:07	80m	+5 / -2	HF100PKP	-2 / -1	2	Partial capture
09-15 21:04	80m	+1 / -	II7IAME	- / -	2	Partial capture
09-15 21:01	80m	-12 / 0	II6IALU	-8 / -4	3	Partial capture
09-15 20:56	80m	-14 / -	II6IGTO	- / -10	4	Partial capture
09-15 20:55	80m	+4 / +2	II9IAGM	+4 / -5	2	Partial capture
09-15 20:53	80m	-4 / -13	3Z100PKP	+8 / -6	3	Partial capture
09-15 20:52	80m	+4 / -	IK8PLJ	- / -10	2	✓ Closing fragment
09-15 19:21	40m	- / -3	F4HEA	-3 / -	2	Partial capture
09-15 19:08	40m	-5 / -	II6IALU	- / -	3	Partial capture
09-15 19:03	40m	+13 / -	TN8GD	- / -	9	Partial capture
09-15 18:56	40m	+4 / -	F5OYA/P	- / -15	6	Partial capture
09-15 18:54	40m	+10 / -	RA3VAN	+4 / -8	4	✓ Closing observed
08-31 17:52	40m	0 / -	R9FAK	- / -	2	Partial capture
08-31 17:49	40m	+3 / -	G4YAN	-2 / -11	4	✓ Closing observed
08-31 17:48	40m	+4 / 0	DL9KM	-2 / 0	4	✓ Full exchange observed
08-31 17:47	40m	+7 / -	F8GAF	-11 / -2	3	✓ Closing observed
08-31 17:46	40m	- / -	G4YAN	-3 / -	2	Partial capture
08-31 17:46	40m	+10 / -5	ON5LC	-14 / -1	3	✓ Full exchange observed
08-31 17:45	40m	+12 / -13	F1PBZ	-4 / -	4	✓ Closing observed
08-31 17:41	40m	+9 / -1	EA2AUK	-7 / -	5	✓ Closing observed
08-31 17:40	40m	+2 / -4	SQ6PM	+3 / -8	6	✓ Full exchange observed
08-31 17:37	40m	+4 / -	EA7KPC	- / -19	4	✓ Closing fragment
08-30 21:00	40m	+6 / -	RU6FK	- / -	2	Partial capture
08-30 20:56	40m	+2 / -	OE5OEL	- / -14	9	✓ Closing fragment
08-30 20:49	40m	+3 / -	VK6BAD	- / -18	7	Partial capture
08-30 20:43	40m	+3 / -	JA4FDZ	- / -	4	Partial capture
08-30 20:42	40m	-1 / -	DL80NRW	- / -	2	Partial capture
08-30 20:41	40m	-4 / -	EW8AAC	0 / -9	3	✓ Closing observed
08-30 20:34	40m	-1 / -	MW7HZQ	- / -14	12	✓ Closing fragment
08-30 20:33	40m	0 / -	R2FDP	- / -14	3	✓ Closing fragment
08-30 20:25	40m	+6 / -	GM3AND	- / -3	15	Partial capture
08-30 20:22	40m	0 / -	IR7MGGC	- / -11	3	Partial capture
08-30 20:20	40m	+3 / -	PC9K	- / -11	3	✓ Closing fragment
08-30 20:17	40m	+6 / -	IZ8PPI	- / -13	4	Partial capture
08-30 20:12	40m	+2 / -	ON3EBR	- / -11	7	Partial capture
08-30 20:10	40m	+3 / -	PD2WCW	- / -15	3	✓ Closing fragment
08-30 19:16	20m	+7 / -6	EI2KXB	-5 / -24	9	✓ Full exchange observed
08-30 18:55	20m	- / -10	EA4IVO	-10 / -	5	✓ Closing fragment
08-30 18:35	20m	-12 / -	OH8MXJ	- / -	2	✓ Closing fragment
08-30 18:34	20m	-4 / -	R4AFR	- / -14	3	✓ Closing fragment
08-30 18:28	20m	-1 / -	UR5HAN	- / -	10	Partial capture
08-30 18:20	20m	-3 / -	BG7BVP	- / +2	12	Partial capture
08-30 18:19	20m	-8 / -	HG0NPJ	- / -	3	Partial capture
08-29 21:02	20m	- / -14	7Z1BQ	-6 / -	4	✓ Closing fragment
08-29 20:14	20m	+1 / -	WC2P	- / -	10	Partial capture
08-29 20:08	20m	+6 / -	BG8HNC	- / -15	12	✓ Closing fragment
08-29 20:06	20m	+15 / -	LY5J	- / -	5	Partial capture
08-29 20:03	20m	-4 / -	LU9XJR	- / -	2	Partial capture
08-29 20:01	20m	+4 / -	F6FWS	- / -	3	Partial capture
08-29 19:55	20m	+3 / -	RL4R	- / -	11	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
190445 +16  592  TN8GD S56UVB JN76 (x6)
190845  +2 2729  II6IALU S56UVB JN76 (x3)
191600  +0 2729  S56UVB II6IALU -16
192100  -3  567  S56UVB F4HEA JN37 (x2)
193700  -5 1095  S56UVB GJ0KYZ RR73
195830  -8 1164  S56UVB AM26CEUTA +03
212630 -14 3003  S56UVB RA9SBN RR73

80m

UTC    dB Audio  Message
205400  +8 1415  S56UVB 3Z100PKP -13
205415  -3 1414  3Z100PKP S56UVB R-06
205530  +4  646  S56UVB II9IAGM +02
205545  +4  646  II9IAGM S56UVB R-05
205645  -7 1611  II6IGTO S56UVB JN76 (x4)
210115 -14 2107  II6IALU S56UVB JN76
210130  -8 2107  S56UVB II6IALU +00
210145  -9 2107  II6IALU S56UVB R-04
210430  +5 1375  II7IAME S56UVB JN76 (x2)
210745  -2 1263  S56UVB HF100PKP -02
210800  +5 1262  HF100PKP S56UVB R-01

20m

UTC    dB Audio  Message
183645 -11 2826  OH8MXJ S56UVB 73
185500  -8  995  S56UVB EA4IVO -10 (x5)
191600  -6  361  S56UVB EI2KXB -06
191615  -2  360  EI2KXB S56UVB JN76
191630  -8  360  S56UVB EI2KXB -08
191745  +1  360  EI2KXB S56UVB R-24 (x2)
191830  -1  361  S56UVB EI2KXB RR73
191845 +17  360  EI2KXB S56UVB R-24 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee