S51UN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovenia Locator transmitted in a decoded message: JN75

Receiver-side FT8 activity involving S51UN, decoded by SO8OO in southeastern Poland. 373 related FT8 messages, 2 CQ messages, observed on 40m, 20m, 10m, across 54 UTC dates. Heard between 2026-06-03 and 2026-08-23.

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

373

Related messages

CQ messages

UTC dates heard

-9 dB

Mean decoder S/N

Bands

40m 20m 10m

First seen: 2026-06-03
Last seen: 2026-08-23 19:35 UTC

Frequent QSO partners observed at SO8OO

Stations S51UN worked most often, as logged from our receiver:

R3HX · European Russia ×3 DL9KM · Fed. Rep. of Germany ×2 UB3AYQ · European Russia ×2 R6DZR · European Russia ×2 Z62NS · Republic of Kosovo ×2 RZ4FWA · European Russia ×2 R3YAR · European Russia ×2 UN8DSW · Kazakhstan ×2 UB1OBV · European Russia ×2 RA9ACA · Asiatic Russia ×2 RL3F · European Russia ×2 TN8GD · Republic of the Congo ×2

Activity Heatmap

Locator transmitted by S51UN

Approximate centre of JN75, decoded 2026-08-23 21:42 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 UTC	Band	S51UN S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 21:41	40m	+3 / -	OZ/DB1LBS	- / -	2	Partial capture
08-23 21:27	40m	-1 / -2	R8CW/4	+2 / -13	16	Partial capture
08-23 21:22	40m	-1 / -22	RA4PIS	-2 / -15	10	✓ Full exchange observed
08-22 20:59	40m	+4 / -	4X4ZP	- / -	2	Partial capture
08-22 20:57	40m	-4 / -	R3NCG	- / -14	2	✓ Closing fragment
08-21 20:39	40m	+6 / -	PY1GB	- / -	2	Partial capture
08-21 20:25	40m	+2 / -14	R7OQ	-11 / -2	5	✓ Full exchange observed
08-21 20:21	40m	- / -8	EW8AAC	-6 / -	2	Partial capture
08-21 20:18	40m	-4 / -5	EW8AAC	-5 / -	3	Partial capture
08-21 20:12	40m	-8 / -	F4MSA	- / -17	3	✓ Closing fragment
08-21 20:02	40m	-9 / -	UB4HVA	- / -	2	Partial capture
08-20 20:49	40m	+4 / -	R3PLN/P	- / -	2	Partial capture
08-20 18:25	40m	0 / -16	R4FV	+6 / -2	4	✓ Full exchange observed
08-20 18:20	40m	-6 / -	DB3MAX	-6 / -4	3	Partial capture
08-20 18:19	40m	-10 / -4	R3YAR	+2 / -7	5	✓ Full exchange observed
08-20 18:18	40m	-8 / -	RK3AW	- / -15	2	✓ Closing fragment
08-20 18:15	40m	-9 / -14	R1IV	-6 / -9	4	✓ Full exchange observed
08-20 18:10	40m	+4 / -14	R4UR	-3 / -5	5	✓ Full exchange observed
08-20 18:07	40m	0 / -	R3PLN/P	- / -	3	Partial capture
08-20 17:53	20m	-5 / -12	RT4A	+4 / -	3	✓ Closing observed
08-20 17:45	20m	-2 / -	5B4ARQ	- / -	2	Partial capture
08-19 20:33	40m	-16 / -	R8LCI	- / -15	6	Partial capture
08-19 20:25	40m	-19 / -	R8LCI	- / -	3	Partial capture
08-19 20:17	40m	-13 / -	BG4UCZ	- / -	2	Partial capture
08-19 20:12	40m	-12 / -	JH5LCN	- / -12	4	✓ Closing fragment
08-19 19:52	40m	-10 / -	JH1CTV	- / -18	4	Partial capture
08-19 19:50	40m	-16 / -	A45XO	- / -15	3	✓ Closing fragment
08-19 19:48	40m	-11 / -4	R5AN	-10 / -2	5	✓ Full exchange observed
08-19 19:42	40m	-9 / -	JH5LCN	- / -	2	Partial capture
08-18 20:42	40m	- / -1	RJ6ON	-10 / -	2	✓ Closing fragment
08-18 20:20	40m	-18 / -	BG7BVI	- / -	2	Partial capture
08-18 20:15	40m	-12 / -	BG7BVI	- / -	2	Partial capture
08-18 16:49	40m	-10 / -	RA3LCI	- / -16	5	✓ Closing fragment
08-18 16:47	40m	-8 / -10	RD7LC	-7 / -4	5	✓ Full exchange observed
08-15 21:20	40m	-17 / -	R1OA	- / -18	3	✓ Closing fragment
08-15 21:15	40m	-12 / -	R1OA	- / -9	2	Partial capture
08-15 21:08	40m	-9 / 0	R50RKZ	-8 / -9	5	✓ Full exchange observed
08-15 21:03	40m	-17 / -	RW3C/P	- / -5	3	✓ Closing fragment
08-15 20:44	40m	-19 / -3	R3ES	-10 / -16	5	✓ Full exchange observed
08-15 14:16	20m	-12 / -	UA1AOF	- / -	2	Partial capture
08-15 14:06	20m	-18 / -	UB3AYQ	- / -14	5	✓ Closing fragment
08-14 21:34	40m	-16 / -14	R2DX	-13 / -14	3	✓ Full exchange observed
08-14 21:25	40m	-16 / -	R1WCK	- / -7	2	✓ Closing fragment
08-14 21:15	40m	-5 / -	RK3DSW	- / -12	4	✓ Closing fragment
08-14 21:12	40m	-6 / -9	UA3QQG	-14 / -14	4	✓ Full exchange observed
08-14 21:04	40m	-14 / -	ON1JP	- / -13	2	✓ Closing fragment
08-14 21:02	40m	-12 / -	RN3RHQ	- / -15	2	✓ Closing fragment
08-14 20:59	40m	-11 / -	4S7LGT	- / -	2	Partial capture
08-14 20:58	40m	-14 / -	BA4IE	- / -	2	Partial capture
08-14 20:49	40m	-17 / -5	RY4ABB	-21 / -8	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
212945  -8  639  R8CW/4 S51UN JN75 (x2)
213030  +4  638  S51UN R8CW/4 -02 (x2)
213115  -3  639  R8CW/4 S51UN R-13 (x5)
213430  +1  638  S51UN R8CW/4 -06
213445  +2  638  R8CW/4 S51UN JN75
213500  +2  638  S51UN R8CW/4 -06
213515  +1  638  R8CW/4 S51UN R-12
214130  +4 1060  OZ/DB1LBS S51UN JN75 (x2)

20m

UTC    dB Audio  Message
141130  -8  970  RK4PR S51UN JN75
141415 -14 1220  R4HHN S51UN JN75
141615 -13 1107  UA1AOF S51UN JN75 (x2)
174515  -3 1256  5B4ARQ S51UN JN75 (x2)
175345  -5 1871  RT4A S51UN JN75
175400  +4 1869  S51UN RT4A -12 (x2)
175715  -6 2322  UA6ADU S51UN JN75
195415  -4 1955  6K5XZE S51UN JN75
181745 -10 1225  R2ZJT S51UN JN75
181845  -1 1780  YC1FEY S51UN -12
182500  +2  633  RW6PA S51UN JN75
122945  -8 1778  RD3TOK S51UN JN75

10m

UTC    dB Audio  Message
130900  +5 1863  S51UN UR4QWW KN77 (x3)
191445 -19 1777  EA8UP S51UN JN75
134345 -21 1980  RV3AMV S51UN 73
134545 -21 1980  DH2DAM S51UN RRR
134715 -20 1980  DL0FTT S51UN RRR
135145 -18 1722  RW3XB S51UN JN75 (x5)
095915 -17 2022  R5MA S51UN JN75 (x3)

Decoder S/N history by band

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