IZ5RKH — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving IZ5RKH, decoded by SO8OO in southeastern Poland. 1,044 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 17 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-08.

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 1,044 FT8 messages attributed to IZ5RKH as the transmitting token by decoded message structure across 17 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (62%), followed by 40 m (37%) and 60 m (0%). Most decodes (62%) fell within the six-hour window 08:00-14:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,044

Messages attributed

UTC dates decoded

131

Active 15-min windows

-10 dB

Estimated median S/N

Bands

60m · 5 40m · 391 20m · 648

First attributed message: 2026-06-07
Last attributed message: 2026-09-08 16:35 UTC

Observed FT8 message patterns

Attributed sample: 1,044 messages
Active dates: 17 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -19 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 218, moderate (-15 to -9 dB) 392, strong (≥ -8 dB) 434.

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 IZ5RKH in decoded directed-looking exchanges:

HA1BF · Hungary ×5 F4HSB · France ×4 PD2WL · Netherlands ×4 PD0TDK · Netherlands ×3 HA1ZW · Hungary ×3 PD4RJ · Netherlands ×3 G4YLJ · England ×3 DL1UDO · Fed. Rep. of Germany ×3 IZ7FLN · Italy ×3 DB2VS · Fed. Rep. of Germany ×2 F5RRS · France ×2 DA1LEO · Fed. Rep. of Germany ×2

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 IZ5RKH

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 · 587 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-09-08 16:35 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	IZ5RKH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 16:27	40m	0 / -	DL7UWR	-14 / -9	4	✓ Closing observed
09-08 16:24	40m	+4 / -	SP0YAGI	- / -15	2	Partial capture
09-08 16:21	40m	-4 / -5	ON3DWD	-10 / -8	6	✓ Full exchange observed
09-08 16:20	40m	-4 / -	DJ0MAB	-6 / 0	3	✓ Full exchange observed
09-08 16:17	40m	0 / -	9A5MP	- / -15	4	✓ Closing fragment
09-08 16:15	40m	+2 / +6	DF6TG	-15 / -7	5	✓ Full exchange observed
09-08 16:13	40m	+2 / -	ON3DWD	- / -13	2	Partial capture
09-08 16:11	40m	- / -	DF5DY	+6 / -	2	Partial capture
09-08 16:11	40m	- / -	R9FDE	-11 / -	3	Partial capture
09-08 16:08	40m	- / -7	F1PBZ	-4 / -	2	Partial capture
09-08 16:07	40m	-4 / -	F4DVP	- / -	2	Partial capture
09-08 16:05	40m	-1 / -	M0DSK	- / -	3	Partial capture
09-08 16:01	40m	-2 / -	F5RMK	- / -12	6	✓ Closing fragment
09-08 15:59	40m	+6 / -	IW0FGX	-7 / +8	4	✓ Closing observed
09-08 15:58	40m	0 / -	IZ1CRA	- / -1	3	✓ Closing fragment
09-08 15:55	40m	-3 / -	ON3CCM	- / -	3	✓ Closing fragment
09-08 15:54	40m	-3 / -	SP8WB	- / -9	3	✓ Closing fragment
09-08 08:50	40m	-7 / -	OE3FVU	- / -	3	Partial capture
09-08 08:47	40m	-7 / -5	OK1UBB	-3 / 0	8	✓ Full exchange observed
09-08 08:39	40m	-12 / -	OE3FVU	- / -	2	Partial capture
09-08 08:36	40m	-6 / -	IU8TIT	- / -	2	Partial capture
09-08 08:33	40m	-14 / -	PD0TDK	- / -11	4	✓ Closing fragment
09-08 08:31	40m	-10 / -	IT9FEG	- / -22	2	✓ Closing fragment
09-08 08:30	40m	-18 / -	PD0A	- / -7	3	✓ Closing fragment
09-08 08:09	40m	-14 / -	OK3MB	- / -	3	Partial capture
09-08 08:06	40m	-17 / -	M0CKX	- / -22	2	Partial capture
09-08 08:05	40m	-14 / -	G5STU	- / -	2	Partial capture
09-08 08:01	40m	-14 / -	M0CKX	- / -19	4	✓ Closing fragment
09-08 07:58	40m	-7 / -	EH3PDA	- / -	3	✓ Closing fragment
09-08 07:56	40m	- / -2	DF1IH	+2 / -	4	Partial capture
09-08 07:54	40m	-14 / -	GJ0KYZ	- / +7	3	✓ Closing fragment
09-08 07:52	40m	- / -	DF1IH	+2 / -	2	Partial capture
09-08 07:52	40m	-14 / -	G4RIQ	- / +4	3	✓ Closing fragment
09-08 07:42	40m	-12 / -	DM3PT	- / -	2	Partial capture
09-08 07:38	40m	-10 / -	ON8HW	- / -	3	Partial capture
09-08 07:36	40m	-9 / -	PD1RGW	- / -	3	Partial capture
09-08 07:34	40m	-4 / -	F1HFP	-20 / +10	3	✓ Closing observed
09-08 07:30	40m	-10 / -	F5RRS	-22 / -	4	✓ Closing observed
09-08 07:22	40m	-9 / -2	YO5OSF	-5 / +5	7	✓ Full exchange observed
09-08 07:22	40m	-9 / -	IZ7FLN	- / -2	2	✓ Closing fragment
09-08 07:21	40m	-9 / +1	SP3DOF	-8 / -23	8	✓ Full exchange observed
09-08 07:19	40m	-9 / -	DL9FFM	-21 / +2	4	✓ Closing observed
08-28 17:53	40m	- / -	HB9FGO	+1 / -	28	Partial capture
08-28 17:29	40m	-2 / -	DA1LEO	- / -	2	✓ Closing fragment
08-28 17:25	40m	+6 / -	IU1WKA	- / -	2	Partial capture
08-28 17:21	40m	+1 / +3	IU2SLI	-10 / -6	6	✓ Full exchange observed
08-28 17:08	60m	-16 / -	OK2RM	- / -	2	✓ Closing fragment
08-28 17:06	60m	- / -10	DD6ZV	0 / -	3	✓ Closing fragment
08-28 17:01	60m	- / -1	IU0KNS	-14 / -	4	✓ Closing fragment
08-28 17:01	60m	-20 / -	F5RMK	- / -9	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
162130 -10 1539  IZ5RKH ON3DWD JO10 (x2)
162215  -5 1538  ON3DWD IZ5RKH -08
162230 -10 1539  IZ5RKH ON3DWD R-05
162245  -3 1538  ON3DWD IZ5RKH RR73
162300  -9 1538  IZ5RKH ON3DWD 73
162415  +7 1138  SP0YAGI IZ5RKH JN53 (x2)
162730 -14 1340  IZ5RKH DL7UWR JO62 (x2)
162815  +1 1340  DL7UWR IZ5RKH -09 (x2)
163445  -1 1340  CQ IZ5RKH JN53 (x3)

60m

UTC    dB Audio  Message
170100 -21 1531  F5RMK IZ5RKH R-09 (x2)
170145 -13 1146  IZ5RKH IU0KNS JN62 (x4)
170645  -1 1146  IZ5RKH DD6ZV JO62 (x3)
170800 -10 1145  CQ IZ5RKH JN53
170830 -17 1737  OK2RM IZ5RKH JN53 (x2)

20m

UTC    dB Audio  Message
124215 +14 2656  IZ5RKH PD2WL +05
124230  -7  977  F4MZI IZ5RKH R-21
124245  -3  977  IZ5RKH F4MZI RR73
124245 +14 2656  IZ5RKH PD2WL +05
124300  -2  977  F4MZI IZ5RKH RR73
124315 +18 2656  IZ5RKH PD2WL +05
124330  -7  977  CQ IZ5RKH JN53
124345 +15 2656  IZ5RKH PD2WL +05
124400  -6 1549  CQ IZ5RKH JN53
124415 +18 2656  IZ5RKH PD2WL +05
124430  -5 1714  <...> IZ5RKH JN53
124445 +18 2656  IZ5RKH PD2WL +01
124500 -12 1562  <...> IZ5RKH JN53
124545 +16 2656  IZ5RKH PD2WL -01 (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.

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