IZ4TNN — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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. 151 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 19 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-17.

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 151 FT8 messages attributed to IZ4TNN as the transmitting token by decoded message structure across 19 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (34%), followed by 40 m (30%) and 20 m (21%). Most decodes (74%) 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 -8 dB.

Overview

151

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 51 40m · 45 20m · 32 10m · 23

First attributed message: 2026-06-08
Last attributed message: 2026-10-17 23:13 UTC

Observed FT8 message patterns

Attributed sample: 151 messages
Active dates: 19 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -15 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 88.

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 VK4XA · Australia A61DD · United Arab Emirates BG0FQU · China F5PBG · France KP4LCA · Puerto Rico PV8AJ · Brazil RC9WC · Asiatic Russia W4PSK · United States 9H6C · Malta DL4DP · 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 · 76 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-17 23:09 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
10-17 23:11	40m	-15 / -14	A61DD	-14 / -	5	✓ Full exchange observed
10-17 23:09	40m	-14 / -	TJ1GD	- / -	2	Partial capture
10-17 23:07	40m	-16 / -	YO6LM	- / +2	2	Partial capture
10-17 23:04	40m	-16 / -	BG0FQU	- / -13	4	✓ Closing fragment
10-13 01:29	80m	- / -	IU2THY	+17 / -	3	Partial capture
10-13 01:29	80m	+1 / +2	SP1MGM	+13 / -13	6	✓ Full exchange observed
10-13 01:27	80m	+8 / -1	F5PBG	+4 / -8	2	Partial capture
10-13 01:23	80m	- / -	DF4WQ	+6 / -	5	Partial capture
10-13 01:23	80m	-9 / -5	DL4DP	+2 / -13	4	✓ Closing observed
10-13 01:22	80m	-5 / -	GM6URC	-2 / -15	4	✓ Closing observed
10-13 01:20	80m	-3 / -4	ON4MAP	-10 / -7	7	✓ Full exchange observed
10-12 02:52	80m	- / -7	G8KHF	+3 / -	4	✓ Closing fragment
10-12 02:49	80m	- / -10	GM6URC	-11 / -	3	Partial capture
10-12 02:49	80m	- / -	IK4TVP	+8 / -	3	✓ Closing fragment
10-12 02:48	80m	- / +9	9H6C	-6 / -	3	✓ Closing fragment
10-09 05:05	40m	+2 / -	N0BUZ	- / -	2	Partial capture
10-02 01:24	80m	-2 / -9	SP5MXZ	+9 / -10	7	✓ Full exchange observed
10-02 01:20	80m	- / -9	SM7TZK	0 / -	3	Partial capture
10-02 01:06	40m	-8 / -	XE1RK	- / -	2	Partial capture
10-02 01:04	40m	-7 / -	NF6P	- / -	2	Partial capture
10-02 01:03	40m	+4 / -	VA2PM	- / -	2	Partial capture
10-01 04:24	80m	- / -14	F1PBZ	-2 / -	2	Partial capture
10-01 04:08	40m	0 / -9	PV8AJ	-14 / -14	5	✓ Full exchange observed
10-01 04:07	40m	+1 / -	K5HQ	- / -	3	Partial capture
10-01 04:04	40m	-2 / -	W4PSK	-7 / -14	6	✓ Full exchange observed
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

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
011245 -24 1737  IZ4TNN SV5AZK KM46
230445 -16 1567  BG0FQU IZ4TNN -13 (x4)
230700 -13 1773  IZ4TNN RZ4FWA LO23
230715 -18 1566  YO6LM IZ4TNN +02 (x2)
230915 -13 1566  TJ1GD IZ4TNN JN54 (x2)
231115 -14  974  IZ4TNN A61DD -14 (x3)
231300 -15 1565  A61DD IZ4TNN RR73
231315 -14  974  IZ4TNN A61DD 73

80m

UTC    dB Audio  Message
012645  +4 2030  CQ IZ4TNN JN54                        a1
012700  +4 2030  IZ4TNN PC2J JO22
012700  +2 1503  IZ4TNN F4HKP JN18
012715  +8 2030  F5PBG IZ4TNN -08
012730  +4 2030  IZ4TNN F5PBG R-01
012845  +5 1815  CQ IZ4TNN JN54
012900  +8 1816  IZ4TNN SP1MGM JO73
012900 +18 2716  IZ4TNN IU2THY JN45
012915  -1 1816  SP1MGM IZ4TNN -13
012930 +17 1816  IZ4TNN SP1MGM R+02
012930 +17 2716  IZ4TNN IU2THY JN45
012945  +3 1818  SP1MGM IZ4TNN R-13
013000 +13 1816  IZ4TNN SP1MGM RR73
013000 +17 2716  IZ4TNN IU2THY JN45
013015  +1 1819  SP1MGM IZ4TNN 73

60m

UTC    dB Audio  Message
041800  -7  596  IZ4TNN MI0NWA -04

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
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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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