IU5KZF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IU5KZF, decoded by SO8OO in southeastern Poland. 126 FT8 messages attributed to this token as transmitter, on 80m, 60m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-08-29.

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 126 FT8 messages attributed to IU5KZF as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (79%), followed by 80 m (21%). Most decodes (83%) fell within the six-hour window 21:00-03:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (86%); the estimated median was -19 dB.

Overview

126

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

80m · 27 60m · 99

First attributed message: 2026-06-25
Last attributed message: 2026-08-29 22:26 UTC

Observed FT8 message patterns

Attributed sample: 126 messages
Active dates: 7 UTC dates
Estimated median S/N: -19 dB
Estimated 10th-90th percentile: -23 to -15 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 108, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 0.

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 IU5KZF in decoded directed-looking exchanges:

DC6KW · Fed. Rep. of Germany ×2 9A5TW · Croatia DF6QN · Fed. Rep. of Germany DG4BZ · Fed. Rep. of Germany DG5PW · Fed. Rep. of Germany DK2MAX · Fed. Rep. of Germany DK3GI · Fed. Rep. of Germany DL1MEV · Fed. Rep. of Germany DL7UFN · Fed. Rep. of Germany EC5M · Spain ER1CW · Moldova HB9RB · Switzerland

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 IU5KZF

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: JN53 · 106 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-08-29 22:26 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	IU5KZF S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 22:02	60m	-17 / -	DC6KW	- / -	3	✓ Closing fragment
08-29 21:58	60m	-20 / -3	DC6KW	-10 / -	2	✓ Closing observed
08-29 21:49	60m	-23 / -	EA7Z	-14 / -4	4	Partial capture
08-29 21:26	60m	- / -15	LY5O	+3 / -	3	✓ Closing fragment
08-29 21:16	60m	- / -20	OZ0A	-5 / -	3	✓ Closing fragment
08-29 21:04	60m	-16 / -7	9A5TW	+4 / -4	4	✓ Full exchange observed
08-29 21:00	60m	- / -8	DK3GI	+8 / -	3	✓ Closing fragment
08-29 20:56	60m	- / -5	DL1MEV	-3 / -	3	✓ Closing fragment
08-29 20:49	60m	-16 / -	HB9RB	+6 / -3	3	✓ Closing observed
08-29 20:46	60m	- / -	DL9KM	-17 / -	2	Partial capture
08-29 20:45	60m	- / -16	DG5PW	-9 / -	3	✓ Closing fragment
08-28 22:32	60m	- / -	DL9KM	-15 / -	5	Partial capture
08-28 22:12	60m	- / -19	IK8WCP	-19 / -	3	✓ Closing fragment
08-28 20:49	60m	- / -20	YO3APJ	+13 / -	3	✓ Closing fragment
08-28 20:43	60m	- / -	PC9K	-16 / -	3	Partial capture
08-28 20:41	60m	- / -21	SP6BCC	0 / -	2	✓ Closing fragment
08-28 20:38	60m	- / -13	IN3UFW	-15 / -	2	✓ Closing fragment
08-28 20:35	60m	- / -9	OE1TKS	-5 / -	3	✓ Closing fragment
08-28 20:30	60m	- / -10	OE6TNO	-8 / -	2	✓ Closing fragment
08-25 21:25	80m	- / -23	OZ5AGJ	-2 / -	2	Partial capture
08-25 21:21	80m	- / -21	EA5HM	-12 / -	5	✓ Closing fragment
08-25 20:29	60m	- / -11	DK2MAX	-7 / -	3	✓ Closing fragment
08-25 20:15	60m	- / -15	DF6QN	+1 / -	3	✓ Closing fragment
07-25 15:55	10m	- / -	PD1HPB	-21 / -	4	Partial capture
07-23 22:23	80m	-24 / -8	OE2AGZ	-10 / -	5	✓ Closing observed
07-23 22:20	80m	-22 / -6	IQ4JO	+4 / 0	5	✓ Full exchange observed
07-23 22:16	60m	- / -6	OK1TRJ	-6 / -	3	✓ Closing fragment
07-23 21:54	60m	-18 / -	S56FPW	-13 / -2	2	Partial capture
07-23 21:30	60m	-24 / -7	ON6LR	-18 / -	3	✓ Closing observed
07-23 21:29	60m	-23 / -	YL3NU	-11 / -	2	✓ Closing observed
07-18 22:13	80m	-22 / -	TN8GD	- / -	2	Partial capture
06-30 03:12	60m	-19 / -8	DL7UFN	-7 / -	4	✓ Closing observed
06-30 03:04	60m	-19 / -	NR0Q	- / -	3	Partial capture
06-30 02:28	60m	- / -8	IW8PQ	-13 / -	3	✓ Closing fragment
06-30 02:26	60m	-19 / -	LY3BRA	- / -	2	Partial capture
06-30 02:23	60m	-16 / -8	OZ3AEV	-5 / -2	4	✓ Full exchange observed
06-30 02:14	60m	-18 / -	KC5RCT	- / -	2	Partial capture
06-30 01:11	60m	- / -	DL9KM	-15 / -	7	Partial capture
06-29 01:50	80m	-17 / -	CS2WWA	- / -	3	Partial capture
06-29 01:47	80m	-16 / -6	TM2WWA	+5 / 0	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
215000 -13 1517  IU5KZF EA7Z IM67
215015 -23 1518  EA7Z IU5KZF -04 (x2)
215215 -18 1518  CQ IU5KZF JN53 (x5)
215830 -10 1517  IU5KZF DC6KW R-03
215845 -20 1516  DC6KW IU5KZF RR73 (x4)
221245 -16 1514  CQ IU5KZF JN53 (x2)

80m

UTC    dB Audio  Message
222345  -8 1657  IU5KZF OE2AGZ JN67 (x4)
222600 -24 1416  OE2AGZ IU5KZF RR73
222630 -16 1416  CQ IU5KZF JN53
211815 -23 1603  IU5KZF DK8UU JN48
212115 -14 1166  IU5KZF EA5HM IM99 (x5)
212530 -22 1410  CQ IU5KZF JN53                        a1
212545  -5 1410  IU5KZF OZ5AGJ JO47 (x2)

10m

UTC    dB Audio  Message
155545 -20 1478  IU5KZF PD1HPB JO22 (x4)

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.

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