ON4DN — 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: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON4DN, decoded by SO8OO in southeastern Poland. 804 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 57 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-22.

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 804 FT8 messages attributed to ON4DN as the transmitting token by decoded message structure across 57 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 60 m (33%) and 20 m (10%). Most decodes (55%) fell within the six-hour window 04:00-10:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

804

Messages attributed

UTC dates decoded

161

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 63 60m · 268 40m · 392 20m · 81

First attributed message: 2026-06-07
Last attributed message: 2026-10-22 15:30 UTC

Observed FT8 message patterns

Attributed sample: 804 messages
Active dates: 57 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -13 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 53, moderate (-15 to -9 dB) 391, strong (≥ -8 dB) 360.

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 ON4DN in decoded directed-looking exchanges:

DL7UKM · Fed. Rep. of Germany ×2 OK1MDX · Czech Republic ×2 DL2AOM · Fed. Rep. of Germany ×2 DL7FE · Fed. Rep. of Germany ×2 IV3DSG · Italy ×2 DL9KM · Fed. Rep. of Germany EA5KCE · Spain F8WAJ · France S57BTI · Slovenia SA3SWE · Sweden TI5RR · Costa Rica 3Z0L · Poland

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 ON4DN

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: JO20 · 567 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,194 km (approx.)
Last such locator decoded: 2026-10-22 15:30 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	ON4DN S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 15:27	40m	- / -8	OK2CNI	+3 / -	3	✓ Closing fragment
10-22 15:24	40m	- / -1	OH3MB	-4 / -	3	✓ Closing fragment
10-22 15:18	40m	- / -5	ON7PR	-4 / -	3	✓ Closing fragment
10-20 06:29	60m	- / -6	HA5UK	+6 / -	2	✓ Closing fragment
10-20 06:18	60m	-7 / -	SP2WIL	- / -3	2	✓ Closing fragment
10-20 06:17	60m	-6 / -	G0JDK	-5 / +8	5	✓ Full exchange observed
10-20 05:54	60m	-8 / -	ON1JP	- / -15	2	✓ Closing fragment
10-20 05:51	60m	-4 / -	KD3CLB	- / -15	2	✓ Closing fragment
10-20 05:49	60m	-4 / -	IZ8EYN	-14 / -	5	✓ Closing observed
10-16 15:35	40m	-4 / -	F5OYA/P	- / -9	2	Partial capture
10-16 06:15	60m	-2 / -	<...>	- / +2	2	Partial capture
10-16 06:12	60m	- / 0	F5OYA/P	-18 / -	2	Partial capture
10-16 05:57	80m	-22 / -	DO2SGW	- / -21	2	✓ Closing fragment
10-16 05:52	80m	-20 / +1	DL2BCY	-7 / +1	4	✓ Full exchange observed
10-16 05:31	80m	-24 / -18	DJ7XY	-17 / -16	5	✓ Full exchange observed
10-16 05:11	60m	-10 / -	VP2MAW	- / -	12	Partial capture
10-16 05:04	60m	- / -1	F/PA2JWN	+3 / -	4	✓ Closing fragment
10-16 05:03	60m	-2 / -9	EA3CUU	0 / -24	6	✓ Full exchange observed
10-16 04:53	60m	0 / -7	YO4BEW	-6 / -24	5	✓ Full exchange observed
10-16 04:50	60m	-4 / -	SP8V	- / -19	2	✓ Closing fragment
10-14 15:39	40m	-5 / -5	IU8RFW	-16 / -8	8	✓ Full exchange observed
10-14 15:38	40m	-3 / -	ON6KHI	-14 / -	5	✓ Full exchange observed
10-14 15:32	40m	-3 / -	M/K4NAS	- / -7	3	Partial capture
10-14 15:31	40m	-2 / -16	RM1B	-3 / -24	7	✓ Full exchange observed
10-14 15:28	40m	-7 / 0	PD0DEX	-10 / -	5	✓ Full exchange observed
10-14 15:15	40m	-2 / -4	DH5IS	-8 / -16	5	✓ Full exchange observed
10-13 13:53	40m	- / -12	DJ3HB	-4 / -	2	✓ Closing fragment
10-11 06:54	60m	- / +6	IK3VUT	-5 / -	3	✓ Closing fragment
10-11 05:49	60m	- / -10	IU5SCG	-14 / -	2	✓ Closing fragment
10-10 13:37	40m	- / -1	OE3UKW	0 / -	3	✓ Closing fragment
10-10 13:36	40m	- / -	SQ1MNG	-7 / -	2	Partial capture
10-10 11:30	40m	- / +1	SP3NJ	-10 / -	2	✓ Closing fragment
10-10 11:17	40m	- / -	IZ4AIF	-2 / -	4	Partial capture
10-10 10:55	40m	- / +5	DD3ZZ	-16 / -	2	Partial capture
09-18 11:35	40m	- / -19	HA3HZ	-10 / -	6	Partial capture
09-18 06:15	40m	- / -	F4BYA	+2 / -	2	Partial capture
09-18 05:55	60m	-22 / -	F6ICX	-12 / -	3	✓ Full exchange observed
09-18 05:50	60m	- / -12	IV3DSG	+7 / -	3	✓ Closing fragment
09-18 05:48	60m	-22 / +6	DJ1NE	-14 / -	3	✓ Closing observed
09-17 18:31	80m	-6 / -6	DO8JB	-3 / -5	4	✓ Full exchange observed
09-17 18:31	80m	- / -2	DO9MH	-1 / -	3	✓ Closing fragment
09-17 13:39	40m	- / -2	DL3DQL/P	+6 / -	2	✓ Closing fragment
09-17 13:32	40m	- / +3	OP4F	-22 / -	2	Partial capture
09-16 17:32	60m	-9 / -1	DD1UN	-8 / -3	6	✓ Closing observed
09-16 17:31	60m	- / -12	GX3RAF/P	-11 / -	3	✓ Closing fragment
09-16 17:27	60m	-8 / -6	HA7UL	-8 / -2	5	✓ Full exchange observed
09-16 17:20	60m	- / -	DM2HW	-10 / -	3	✓ Closing fragment
09-15 16:56	60m	-11 / +5	DL5NON	-6 / +3	4	✓ Full exchange observed
09-15 05:58	80m	- / -	DO2KTE	+4 / -	2	✓ Closing fragment
09-15 05:41	80m	- / -4	DF2NV	+8 / -	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
151230  -5  491  CQ ON4DN JO20
151330  -6  491  F4NJU ON4DN RR73
151500  -9  491  CQ ON4DN JO20
151845  -7  491  ON4DN ON7PR JO20 (x3)
152145 -13 1020  ON4DN G0JDK IO93
152415  -3 2017  ON4DN OH3MB KP20 (x3)
152600  -4  492  CQ ON4DN JO20
152715  +5 2581  ON4DN OK2CNI JN79 (x3)
153000  -5  491  CQ ON4DN JO20

60m

UTC    dB Audio  Message
061800  -5  519  ON4DN G0JDK R+14
061815  -7  451  G0JDK ON4DN RR73
061830  -3  519  ON4DN G0JDK 73
061845  -6  451  SP2WIL ON4DN -03 (x2)
062015 -10  451  CQ ON4DN JO20 (x5)
062900  +7 1173  ON4DN HA5UK -06 (x2)
063145 -11  476  CQ ON4DN JO20                         a1 (x3)

80m

UTC    dB Audio  Message
055315 -21 1362  DL2BCY ON4DN RR73
055545 -23 1625  CQ ON4DN JO20 (x2)
055715 -24 1624  DO2SGW ON4DN -21 (x2)
055915 -24 1624  CQ ON4DN JO20 (x9)
060745 -19 1015  DL0MFX ON4DN JO20

160m

UTC    dB Audio  Message
201900 -10 1953  ON4DN 9A4ZM JN86

20m

UTC    dB Audio  Message
084245  -7  409  EA5KCE ON4DN R-08 (x2)
084345  -8  409  EA3ISA ON4DN -17
084445  -4  409  F4JYA/P ON4DN JO20
084845 -10  353  F8WAJ ON4DN JO20 (x2)
085000  +0  353  ON4DN F8WAJ 73
085200  -4  307  <...> ON4DN JO20 (x3)
085400  -6  307  TI5RR ON4DN JO20 (x3)
085545  -6  306  M8JJS ON4DN JO20 (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