S57CT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovenia Locator transmitted in a decoded message: JN76

Receiver-side FT8 activity involving S57CT, decoded by SO8OO in southeastern Poland. 299 related FT8 messages, observed on 80m, 40m, 20m, across 49 UTC dates. Heard between 2026-05-26 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.

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

Overview

299

Related messages

CQ messages

UTC dates heard

-6 dB

Mean decoder S/N

Bands

80m 20m 40m

First seen: 2026-05-26
Last seen: 2026-08-23 13:26 UTC

Frequent QSO partners observed at SO8OO

Stations S57CT worked most often, as logged from our receiver:

IQ2PV · Italy ×2 US1VAA · Ukraine ×2 DG1KFR · Fed. Rep. of Germany ×2 IQ0VT · Italy ×2 DL4QB · Fed. Rep. of Germany ×2 DL2VN · Fed. Rep. of Germany MM3WYM · Scotland DL3BH · Fed. Rep. of Germany 2D0VPS/P · Isle of Man MI7DKR · Northern Ireland SQ2BXI · Poland IW8PQ · Italy

Activity Heatmap

Locator transmitted by S57CT

Approximate centre of JN76, decoded 2026-08-23 15:10 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	S57CT S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 15:26	20m	- / +6	GU0UVH	-4 / -	2	Partial capture
08-23 15:13	20m	- / -	ON1AJ	-11 / -	2	Partial capture
08-23 15:10	20m	-15 / +2	F1THK	+2 / 0	5	✓ Full exchange observed
08-22 20:55	20m	-5 / -3	D2UY	+8 / -	3	✓ Closing observed
08-14 08:49	20m	- / -8	M7OFN	-9 / -	3	✓ Closing fragment
08-13 18:12	80m	-2 / +1	YT2ZE	+7 / -	7	✓ Full exchange observed
08-13 18:11	80m	+10 / -	DO8JB	- / -18	3	✓ Closing fragment
08-13 18:09	80m	-9 / -3	US1VAA	+13 / +7	5	✓ Full exchange observed
08-13 18:07	80m	-3 / +4	YU7AS	0 / +7	4	✓ Full exchange observed
08-13 18:05	80m	+4 / -	DO9FR	-14 / -5	4	✓ Closing observed
08-12 09:10	20m	+4 / +7	PD7RF	+2 / -	5	✓ Full exchange observed
08-12 09:04	20m	+2 / -	YO9IAB	-7 / -	3	✓ Closing observed
08-12 09:03	20m	-22 / -7	PA0HCL	-19 / +6	4	✓ Full exchange observed
08-12 09:01	20m	-4 / -	EA5BH	- / -	4	Partial capture
08-12 08:57	20m	+3 / -	SP2SGZ	- / -3	2	Partial capture
08-12 08:56	20m	-2 / -	SP3GTP	- / -11	3	✓ Closing fragment
08-11 11:18	20m	-16 / -	<...>	- / -	2	Partial capture
08-11 10:25	20m	-4 / -	<...>	- / -3	5	Partial capture
08-11 09:19	20m	0 / -	HA7JLR	- / +2	4	Partial capture
08-11 09:17	20m	-21 / -	SV0LS	- / -	2	Partial capture
08-11 09:12	20m	-12 / -	F4JVF	- / -	2	Partial capture
08-11 09:11	20m	+3 / -	OE8DDX	- / -	2	Partial capture
08-11 09:08	20m	-18 / -	PD0MNO	- / +1	2	✓ Closing fragment
08-10 07:41	20m	-8 / -	PD0U	- / -6	3	✓ Closing fragment
08-10 07:38	20m	+10 / -9	DJ7TO	+14 / -	3	Partial capture
08-10 07:36	20m	+4 / -	LA2PIA	- / -5	2	✓ Closing fragment
08-10 07:32	20m	-4 / -4	YO6LM	-5 / +5	8	✓ Full exchange observed
08-10 07:31	20m	-10 / -	<...>	- / -	2	Partial capture
08-10 07:29	20m	-9 / -	PD0SF	- / -14	3	✓ Closing fragment
08-10 07:26	20m	+2 / -	YO1BRANCUSI	+7 / +10	3	Partial capture
08-10 07:24	20m	+6 / -	OK5AW	- / -	3	✓ Closing fragment
08-10 07:21	20m	+3 / -9	F4MSA	-17 / +1	2	Partial capture
08-09 06:15	20m	- / -	ON8PR	-23 / -	2	✓ Closing fragment
08-06 15:47	40m	-16 / -	IU1DSU	- / +2	2	Partial capture
08-06 15:44	40m	-6 / -	DL1TJ	- / -21	4	✓ Closing fragment
08-06 15:42	40m	-16 / -	SQ9AWN	- / +1	3	✓ Closing fragment
08-06 15:41	40m	-10 / -	G7EVY	- / -	3	Partial capture
08-06 15:38	40m	-13 / -	DK4RH	- / -	3	Partial capture
08-06 15:33	40m	-15 / -	F4FSY	- / +2	3	✓ Closing fragment
08-05 06:48	40m	-17 / -9	DL2VN	-18 / -1	3	✓ Full exchange observed
08-05 06:42	40m	-11 / 0	SQ2BXI	-6 / +7	3	✓ Full exchange observed
08-05 06:32	40m	-21 / -	SM7JKW	- / -10	3	✓ Closing fragment
08-04 11:58	20m	- / -1	ON7USB	-15 / -	2	Partial capture
08-01 08:56	20m	-24 / +2	DK4BP	-19 / -	3	✓ Closing observed
08-01 08:52	20m	-8 / -	G1JMD	- / -18	3	✓ Closing fragment
07-31 05:42	20m	+4 / -	EA1AXX	- / -	2	✓ Closing fragment
07-31 05:40	20m	-13 / -	F5NKX	- / -	2	Partial capture
07-31 05:39	20m	-8 / -	M0LAD	- / +6	2	Partial capture
07-31 05:38	20m	-17 / -	K9STL	- / -6	2	✓ Closing fragment
07-30 06:04	40m	-18 / -	IZ7KGB	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
085100  -6  505  S57CT M7OFN 73
085900 -22 1904  S57CT ON5MX +12
205515  -5 2617  D2UY S57CT JN76
205530  +9 2618  S57CT D2UY -03 (x2)
151015 -19 2410  F1THK S57CT JN76
151030  +0 2410  S57CT F1THK +02
151045 -14 2410  F1THK S57CT R+00
151100  +5 2410  S57CT F1THK RR73
151115 -13 2410  F1THK S57CT 73
151330 -14 1217  S57CT ON1AJ JO20 (x2)
151730  -1  829  S57CT G3PMY +02
152615  -5  898  S57CT GU0UVH +06 (x2)

80m

UTC    dB Audio  Message
180900 -15 1141  US1VAA S57CT JN76
180915 +14 1142  S57CT US1VAA -03
180930  -2 1140  US1VAA S57CT R+07
180945 +12 1142  S57CT US1VAA RR73
181000  -9 1140  US1VAA S57CT 73
181100  +8  424  DO8JB S57CT -18 (x3)
181230  +0 1539  YT2ZE S57CT JN76
181245  +5 1541  S57CT YT2ZE +01
181300  -3 1539  YT2ZE S57CT R+13
181315  +7 1540  S57CT YT2ZE RR73
181330  +3 1539  YT2ZE S57CT R+13
181345  +8 1540  S57CT YT2ZE RR73
181400  -6 1539  YT2ZE S57CT 73

40m

UTC    dB Audio  Message
153900 -11  872  DK4RH S57CT JN76
153930 -11 2466  DH0AS S57CT R-08
154045 -15 2465  S57CT UA4FKT LO23
154100 -11 1036  G7EVY S57CT JN76 (x3)
154230 -14 1354  SQ9AWN S57CT JN76 (x3)
154400  +2  585  DL1TJ S57CT JN76 (x4)
154700 -14 1187  IU1DSU S57CT JN76 (x2)

Decoder S/N history by band

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