IZ3ZUS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN65

Receiver-side FT8 activity involving IZ3ZUS, decoded by SO8OO in southeastern Poland. 101 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-15.

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 101 FT8 messages attributed to IZ3ZUS as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (98%), followed by 20 m (2%). Several six-hour UTC windows tied for the largest share (99%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

101

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 99 20m · 2

First attributed message: 2026-06-07
Last attributed message: 2026-08-15 21:17 UTC

Observed FT8 message patterns

Attributed sample: 101 messages
Active dates: 7 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -22 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 57, moderate (-15 to -9 dB) 38, strong (≥ -8 dB) 6.

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 IZ3ZUS in decoded directed-looking exchanges:

F6ARS · France ×2 R5AV · European Russia ×2 SP5GEO · Poland ×2 PD1ALW · Netherlands PD1HTW · Netherlands CT1BFP · Portugal DG1KPC · Fed. Rep. of Germany DK6WS · Fed. Rep. of Germany DL8GBR · Fed. Rep. of Germany F1ODM · France F4ACR · France F4HSB · France

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 IZ3ZUS

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: JN65 · 55 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 821 km (approx.)
Last such locator decoded: 2026-08-15 21:17 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	IZ3ZUS S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-16 09:07	10m	- / -19	PD1ALW	-9 / -	2	✓ Closing fragment
08-15 21:17	80m	-17 / -16	DG0LFG	+6 / -	3	Partial capture
08-15 21:13	80m	-24 / -	DO1DQ	- / -15	4	Partial capture
08-15 20:32	20m	- / -15	GB2EL	-15 / -	4	Partial capture
08-15 20:27	20m	- / -13	F4ACR	0 / -	3	✓ Closing fragment
08-15 20:16	20m	- / -5	MM0GTU	-3 / -	2	✓ Closing fragment
08-08 22:06	80m	- / -13	DL2VEL	-3 / -	3	✓ Closing fragment
08-08 20:53	20m	- / +8	PI4DX	-16 / -	2	✓ Closing fragment
08-08 15:26	20m	- / -14	M9VVE	-12 / -	3	✓ Closing fragment
08-08 15:17	20m	- / +1	F4HSB	-2 / -	3	✓ Closing fragment
08-08 15:14	20m	- / -	G0CMQ	-13 / -	2	Partial capture
08-08 14:41	20m	- / +7	F6ARS	+7 / -	3	✓ Closing fragment
08-08 14:38	20m	- / -	F6ARS	+12 / -	2	✓ Closing fragment
08-07 09:12	10m	- / -9	SV8DJW	-16 / -	2	Partial capture
08-07 07:38	20m	- / -8	R50RKZ	+8 / -	2	✓ Closing fragment
08-05 20:54	80m	-20 / -	SV3DCX	+2 / -	3	✓ Closing observed
08-05 20:52	80m	-17 / -11	DM2RM	+18 / -3	6	✓ Full exchange observed
08-05 13:19	20m	- / -7	G7EVY	-10 / -	2	✓ Closing fragment
08-05 09:11	20m	- / -20	SM3MLX	-18 / -	2	Partial capture
08-05 08:54	20m	- / -13	OZ6P	-2 / -	2	✓ Closing fragment
08-01 18:45	80m	- / -15	IK2VFR/P	-18 / -	2	✓ Closing fragment
07-31 20:54	80m	-18 / -17	RL2F	-2 / -8	8	✓ Full exchange observed
07-31 20:49	80m	-7 / -14	SP5GEO	+5 / -12	5	✓ Full exchange observed
07-31 20:45	80m	-20 / -24	UA4FKT	+8 / -	4	✓ Closing observed
07-31 20:43	80m	-17 / -	S55P	- / -22	5	✓ Closing fragment
07-31 20:39	80m	-17 / -	SV9MBH	-16 / -19	5	Partial capture
07-31 20:35	80m	-20 / -23	SQ4FAE/P	0 / -15	7	✓ Full exchange observed
07-31 20:30	80m	-15 / -	UT5ZC	- / -	4	Partial capture
07-31 20:27	80m	-17 / -9	OK7GU	+19 / +1	5	✓ Full exchange observed
07-31 20:26	80m	-18 / -17	5P1KZX	-6 / -17	5	✓ Full exchange observed
07-31 20:25	80m	-22 / -19	DB3OI	+3 / -9	4	✓ Full exchange observed
07-31 20:23	80m	-18 / -	T77R	-12 / -8	4	✓ Closing observed
07-31 19:06	20m	- / -15	TN8GD	-4 / -	2	✓ Closing fragment
07-31 11:31	20m	- / -11	OE1AES	-11 / -	2	Partial capture
07-31 11:27	20m	- / -17	M7NXS	-22 / -	2	Partial capture
07-31 07:19	20m	- / -11	F1PBZ	+6 / -	2	Partial capture
07-30 20:34	60m	- / -19	LB5WB	0 / -	2	✓ Closing fragment
07-30 20:29	60m	- / -2	DJ2KP	-10 / -	2	✓ Closing fragment
07-30 08:21	20m	- / +1	PA0GDL	-13 / -	2	Partial capture
07-30 08:18	20m	- / -	PD3LKN	-20 / -	2	✓ Closing fragment
07-30 08:11	20m	- / -11	PD3PAM	-16 / -	8	Partial capture
07-30 08:00	20m	- / -13	M3BGE	-13 / -	3	✓ Closing fragment
07-30 07:56	20m	- / -	DG1KPC	-11 / -	2	✓ Closing fragment
07-28 20:32	80m	-16 / -	DL4BCY	-18 / -21	5	Partial capture
07-28 20:30	80m	-10 / -	DO6TG	- / -18	2	✓ Closing fragment
07-28 20:25	80m	-13 / -13	DL8RBR	-3 / 0	7	✓ Full exchange observed
07-28 20:22	80m	-11 / -13	DL1NEO	+10 / -	5	Partial capture
07-28 20:20	80m	-12 / -14	DO7LIA	+1 / -4	5	✓ Full exchange observed
07-28 20:15	80m	-19 / -21	IU8PML	-12 / -11	5	✓ Full exchange observed
07-28 20:14	80m	-19 / -24	OZ3AT	+5 / -	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
160045 -23 1372  IZ3ZUS IT9KVQ R-01
165915 -18 1478  IZ3ZUS EA6TU -01
170145 -21 1364  IZ3ZUS R5AV RR73
205345 -16 2255  IZ3ZUS PI4DX +08 (x2)
201600  -3  873  IZ3ZUS MM0GTU -05 (x2)
202700  -3 1354  IZ3ZUS F4ACR IN96 (x3)
203230  -9 1144  IZ3ZUS GB2EL -15 (x4)
162030 -12 1348  IZ3ZUS II7MGMU +06

10m

UTC    dB Audio  Message
075215 -11  995  IZ3ZUS PD1HTW -10 (x2)
091200 -20 1766  IZ3ZUS SV8DJW -09 (x2)
090745  -8 1205  IZ3ZUS PD1ALW -19 (x2)

80m

UTC    dB Audio  Message
205530  +2  797  IZ3ZUS SV3DCX RR73
205545 -20 1345  SV3DCX IZ3ZUS 73
205730  +5  728  IZ3ZUS DO3VE -13
220630  -1 1451  IZ3ZUS DL2VEL -13 (x3)
221345 -24 1301  DP6K/P IZ3ZUS JN65
221600  +5 1852  IZ3ZUS DP6K/P RR73
211330 -24 1298  DO1DQ IZ3ZUS JN65 (x4)
211730 -17 1349  DG0LFG IZ3ZUS JN65
211815 +10 1218  IZ3ZUS DG0LFG -16 (x2)

60m

UTC    dB Audio  Message
202945 -11 1426  IZ3ZUS DJ2KP -02 (x2)
203415  +0 1009  IZ3ZUS LB5WB -19 (x2)

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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