IZ4TNN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IZ4TNN, decoded by SO8OO in southeastern Poland. 99 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 14 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-18.

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 99 FT8 messages attributed to IZ4TNN as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (32%), followed by 80 m (31%) and 10 m (23%). Most decodes (69%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 31 40m · 13 20m · 32 10m · 23

First attributed message: 2026-06-08
Last attributed message: 2026-09-18 02:15 UTC

Observed FT8 message patterns

Attributed sample: 99 messages
Active dates: 14 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -16 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 40, strong (≥ -8 dB) 49.

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 IZ4TNN in decoded directed-looking exchanges:

JA4LXY · Japan JE6WOQ · Japan PP2RR · Brazil VK4XA · Australia P40AA · Aruba AD8J · United States F5PBG · France KP4LCA · Puerto Rico RC9WC · Asiatic Russia DJ7XY · Fed. Rep. of Germany DO1FFO · Fed. Rep. of Germany DO1OAS · Fed. Rep. of Germany

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 IZ4TNN

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: JN54 · 51 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-09-18 02:15 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	IZ4TNN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 02:39	40m	- / 0	RC9WC	-10 / -	2	✓ Closing fragment
09-18 02:38	40m	- / -3	F5PBG	-8 / -	2	✓ Closing fragment
09-18 02:34	40m	- / -10	KP4LCA	-10 / -	2	✓ Closing fragment
09-18 02:34	40m	- / -12	W3DFX	-22 / -	2	Partial capture
09-18 02:22	80m	- / -5	OK1HEH	+2 / -	4	✓ Closing fragment
09-18 02:18	80m	- / -5	OK1HEH	-3 / -	3	Partial capture
09-18 02:14	80m	-8 / -	K6UFO	- / -	3	Partial capture
09-18 02:11	80m	-8 / -4	RA2FCF	+4 / -3	7	✓ Full exchange observed
09-18 02:10	80m	-13 / -11	R3PLN	+2 / -	4	Partial capture
09-18 02:09	80m	- / +7	ON1JP	-20 / -	5	Partial capture
09-18 02:09	80m	- / -	ON4MAP	-16 / -	2	Partial capture
09-18 02:08	80m	-10 / +1	PI4DX	+7 / -8	6	✓ Full exchange observed
09-18 02:07	80m	- / -2	ON3MOH	-10 / -	2	Partial capture
09-02 09:31	10m	-8 / -	VK4XA	- / -4	4	✓ Closing fragment
09-02 09:29	10m	-10 / -	JE6WOQ	- / -3	4	✓ Closing fragment
09-02 09:27	10m	-9 / -	JE6HOG	- / -	2	Partial capture
09-02 09:25	10m	-6 / -	JE6WOQ	- / -	2	Partial capture
09-02 09:21	10m	-10 / -	JA4LXY	- / -	4	✓ Closing fragment
08-30 17:34	20m	- / -	R7OV	-6 / -	2	Partial capture
08-30 17:33	20m	- / -	DL8YBL	+1 / -	2	Partial capture
08-29 07:11	20m	- / -	EA5HM	-4 / -	5	Partial capture
08-29 07:08	20m	- / -1	VK3EVE	-12 / -	2	Partial capture
08-07 06:28	20m	- / +6	P40AA	-11 / -	3	✓ Closing fragment
08-06 05:13	20m	- / -	EA5HM	-18 / -	4	Partial capture
07-28 02:03	40m	-7 / -	PY5QW	- / -10	3	Partial capture
07-28 02:01	40m	-7 / -	NC3S	- / -	2	Partial capture
07-28 01:55	80m	-4 / -4	DJ7XY	-11 / -4	7	✓ Full exchange observed
07-28 01:51	80m	-4 / 0	DO1OAS	+1 / -	4	✓ Closing observed
07-28 01:51	80m	-6 / -10	UA6AR	+13 / -6	5	✓ Full exchange observed
07-28 01:47	80m	-8 / -11	DO1FFO	-4 / -6	6	✓ Full exchange observed
07-28 01:47	80m	- / -	UX7QV	+9 / -	2	Partial capture
07-28 01:47	80m	-5 / -	DO9BAU	+15 / 0	9	✓ Closing observed
07-28 01:39	40m	-10 / -11	AD8J	-20 / -8	6	✓ Full exchange observed
07-28 01:37	40m	-4 / -	KA1ERL	- / -	2	Partial capture
07-22 16:51	10m	-15 / -	PP2RR	- / -8	3	✓ Closing fragment
07-13 15:27	20m	-14 / -	OS4K	- / -11	3	Partial capture
07-13 15:26	20m	-8 / -	OH6IH	- / -11	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
014145 -15 1686  AD8J IZ4TNN R-08 (x2)
020115  -7 1692  NC3S IZ4TNN JN54 (x2)
020300  -7 1691  PY5QW IZ4TNN JN54 (x3)
023415 -24 1886  IZ4TNN W3DFX -12
023415 -10  659  IZ4TNN KP4LCA -10 (x2)
023515 -20 1886  IZ4TNN W3DFX -12
023845  -3 1529  IZ4TNN F5PBG R-03 (x2)
023945  -9 2238  IZ4TNN RC9WC +00 (x2)

80m

UTC    dB Audio  Message
021215  +3 1452  IZ4TNN RA2FCF R-14
021230  -8 1627  RA2FCF IZ4TNN R-03
021230  +2  745  IZ4TNN R3PLN -11
021245  -1 1452  IZ4TNN RA2FCF RR73
021300  -7 1627  RA2FCF IZ4TNN RR73
021400  +0 1627  K6UFO IZ4TNN JN54 (x3)
021800  -3 1757  IZ4TNN OK1HEH -05 (x7)

10m

UTC    dB Audio  Message
092245 -13 1987  JA4LXY IZ4TNN JN54 (x2)
092530  -6 2006  JE6WOQ IZ4TNN JN54 (x2)
092700  -8 2031  JR4ABB IZ4TNN -14
092730  -9 2042  JE6HOG IZ4TNN JN54 (x2)
092930 -10 1879  JE6WOQ IZ4TNN JN54 (x4)
093145  -6 1914  VK4XA IZ4TNN JN54 (x4)

20m

UTC    dB Audio  Message
062830 -10 1510  IZ4TNN P40AA +06 (x3)
070845 -13 1566  IZ4TNN VK3EVE -01 (x2)
071145  -6 1527  IZ4TNN EA5HM IM99 (x5)
173215  -1 1501  CQ IZ4TNN JN54
173300  +2 1685  IZ4TNN DL8YBL JO31 (x2)
173400  -7 1500  IZ4TNN R7OV KN87 (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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