ISUB/IT9ACJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy

Receiver-side FT8 activity involving ISUB/IT9ACJ, decoded by SO8OO in southeastern Poland. 105 FT8 messages attributed to this token as transmitter, on 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-10-01 and 2026-10-04.

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 105 FT8 messages attributed to ISUB/IT9ACJ as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (91%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (68%); the estimated median was -17 dB.

Overview

105

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

40m · 105

First attributed message: 2026-10-01
Last attributed message: 2026-10-04 16:53 UTC

Observed FT8 message patterns

Attributed sample: 105 messages
Active dates: 4 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -21 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 71, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 5.

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 ISUB/IT9ACJ in decoded directed-looking exchanges:

F5PBG · France G0RVY · England

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.

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	ISUB/IT9ACJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-04 21:35	40m	- / +3	DG5LP	+8 / -	2	Partial capture
10-04 20:36	40m	- / -7	RA6AR	-6 / -	2	Partial capture
10-04 19:47	40m	- / +3	RL3QGD	-17 / -	5	Partial capture
10-04 16:51	40m	- / -2	OK1FKY	-5 / -	3	Partial capture
10-04 07:43	40m	- / -	SQ2PHC	-8 / -	2	Partial capture
10-03 22:43	40m	-18 / -	UA9SY	- / -14	2	Partial capture
10-03 15:39	40m	- / -	DD3ZZ	-5 / -	2	Partial capture
10-03 08:00	40m	- / -	IZ0MQN	-19 / -	5	Partial capture
10-03 06:38	40m	- / -12	US1MM	-8 / -	2	Partial capture
10-03 06:30	40m	- / -7	SQ9KWY	-1 / -	2	Partial capture
10-03 06:24	40m	- / -	IZ2BKU	-3 / -	2	Partial capture
10-03 06:08	40m	- / -	UX7QV	0 / -	7	Partial capture
10-03 05:13	40m	- / -	DM1EE	-19 / -	3	Partial capture
10-03 05:10	40m	- / -4	SV2HXV	-14 / -	3	Partial capture
10-03 03:18	40m	- / -	IK6DLK	-16 / -	2	Partial capture
10-02 22:51	40m	- / +1	RA4CGX	-15 / -	2	Partial capture
10-02 21:18	40m	- / -	DL1SVI	-17 / -	3	Partial capture
10-02 21:13	40m	- / -	PD0LH	-12 / -	2	Partial capture
10-02 21:06	40m	- / -	MW7RHR	-13 / -	3	Partial capture
10-02 20:27	40m	- / -	RN6HK	-10 / -	2	Partial capture
10-02 20:26	40m	-1 / -6	G0UDE	-14 / -	3	Partial capture
10-02 20:13	40m	-17 / -	F5PBG	-6 / -	2	✓ Closing observed
10-02 19:50	40m	-13 / -	<...>	- / -	2	✓ Closing fragment
10-02 19:47	40m	- / -	DK4RH	-10 / -	7	Partial capture
10-02 19:44	40m	- / -	F5PBG	-5 / -	2	Partial capture
10-02 19:10	40m	- / -	EA5GO	-3 / -	5	Partial capture
10-02 17:52	40m	- / -14	UA3PAB	+8 / -	2	Partial capture
10-02 17:42	40m	- / -8	S59WT	-9 / -	2	Partial capture
10-02 17:42	40m	- / -1	YL3KZ	+1 / -	2	Partial capture
10-02 17:32	40m	-14 / -2	EB1ESK	-17 / -2	3	Partial capture
10-02 17:28	40m	- / -11	9A2KO	-8 / -	2	Partial capture
10-02 17:20	40m	- / -2	F6FHZ	-18 / -	3	Partial capture
10-02 15:41	40m	- / -9	R6OE	-12 / -	3	Partial capture
10-02 15:31	40m	- / -	DD9PN	-12 / -	2	Partial capture
10-02 14:38	40m	- / -	IU7QBB	-12 / -	2	Partial capture
10-02 12:14	40m	- / -	PD0DEX	-20 / -	3	Partial capture
10-02 08:29	40m	- / -13	DG3AWN	-14 / -	3	Partial capture
10-02 07:18	40m	- / -	IV3CLI	-4 / -	3	Partial capture
10-02 07:13	40m	- / -	IV3CLI	-3 / -	6	Partial capture
10-02 06:00	40m	- / -	DL7AOM	-8 / -	2	Partial capture
10-02 05:52	40m	- / -	UR1HR	-8 / -	2	Partial capture
10-02 05:52	40m	- / -	IU3VQA	-19 / -	8	Partial capture
10-02 05:41	40m	- / -	SP1MGM	-9 / -	3	Partial capture
10-02 05:05	40m	- / -1	YL3AKH	0 / -	4	Partial capture
10-02 04:41	40m	- / -25	R3YK	-13 / -	7	Partial capture
10-01 22:35	40m	-16 / -	<...>	- / -	2	✓ Closing fragment
10-01 22:32	40m	- / -	VO1ACZ	-19 / -	3	Partial capture
10-01 21:58	40m	-15 / -	<...>	- / -	7	✓ Closing fragment
10-01 21:49	40m	- / -	PD1HBL	-12 / -	7	Partial capture
10-01 20:44	40m	- / -14	EI4JFB	-3 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
165100  -3  942  ISUB/IT9ACJ OK1FKY JO70 (x3)
165345  -7  942  TA2EE ISUB/IT9ACJ -14
194745 -15 1537  ISUB/IT9ACJ RL3QGD KO91 (x5)
201430 -11 1909  ISUB/IT9ACJ UR4LJ KO80
203630  -8  943  ISUB/IT9ACJ RA6AR KN93 (x2)
213545  +8  940  ISUB/IT9ACJ DG5LP JN48 (x2)
033830  +1  740  ISUB/IT9ACJ UT2AU KO61

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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