ON4CFC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving ON4CFC, decoded by SO8OO in southeastern Poland. 302 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 16 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-21.

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 302 FT8 messages attributed to ON4CFC as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 20 m (21%) and 10 m (7%). Most decodes (51%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (62%); the estimated median was -7 dB.

Overview

302

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 8 40m · 208 20m · 64 10m · 22

First attributed message: 2026-06-06
Last attributed message: 2026-09-21 06:07 UTC

Observed FT8 message patterns

Attributed sample: 302 messages
Active dates: 16 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -18 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 45, moderate (-15 to -9 dB) 71, strong (≥ -8 dB) 186.

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 ON4CFC in decoded directed-looking exchanges:

F4PCM · France CT7AXN · Portugal DL7GAL · Fed. Rep. of Germany DM1RG · Fed. Rep. of Germany DM5KK · Fed. Rep. of Germany EA3CFV · Spain EA3HMM · Spain EA5PS · Spain EA7UW · Spain EU6KA · Belarus F1IQH · France F1PBZ · France

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 ON4CFC

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: JO21 · 198 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-09-21 06:06 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	ON4CFC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 06:06	40m	-11 / -	VE9LS	- / -9	3	✓ Closing fragment
09-21 06:04	40m	-8 / -12	SP5DUJ	-23 / -25	2	Partial capture
09-21 06:03	40m	-4 / -9	SP4MPH	+4 / -	3	✓ Closing observed
09-21 05:59	40m	-8 / -	SQ8ECJ	-18 / -4	3	✓ Closing observed
09-21 05:57	40m	-12 / -8	EU6KA	-5 / -17	5	✓ Full exchange observed
09-21 05:57	40m	-8 / -	EA3CFV	- / -10	2	✓ Closing fragment
09-21 05:54	40m	-8 / -18	RK3DJW	-7 / -14	4	✓ Full exchange observed
09-21 05:53	40m	-5 / -	SQ6PZL	- / -10	2	Partial capture
09-21 05:49	40m	- / -16	RK3DJW	-6 / -	3	Partial capture
09-21 05:48	40m	- / -	IU8DON	-12 / -	2	Partial capture
09-21 05:47	40m	-8 / -	CT7AXN	- / -14	2	✓ Closing fragment
09-21 05:47	40m	- / +7	GJ0KYZ	-4 / -	2	Partial capture
09-21 05:43	40m	- / -10	EA5PS	-12 / -	2	✓ Closing fragment
09-21 05:30	40m	- / -5	IK4CBO	0 / -	2	✓ Closing fragment
09-21 05:28	40m	-5 / -5	IZ4AIF	+7 / -4	7	✓ Full exchange observed
09-20 07:10	40m	- / -20	PD7LJ	-18 / -	2	✓ Closing fragment
09-20 07:05	40m	- / -16	OM6AKO	-18 / -	5	Partial capture
09-20 06:57	40m	-9 / -7	I4WQH	-2 / -	3	✓ Full exchange observed
09-20 06:51	40m	-10 / +2	II6IALU	-12 / -8	4	Partial capture
09-20 06:50	40m	-16 / -2	F1IQH	-14 / -	3	✓ Closing observed
09-19 06:58	40m	- / -	DL7ARV	+9 / -	7	Partial capture
09-19 06:53	40m	-23 / -1	DM5KK	+2 / -	5	✓ Closing observed
09-19 06:48	40m	-20 / -	SA4AGM	-17 / -7	3	✓ Closing observed
09-19 06:47	40m	-18 / -21	DM1RG	-1 / +8	5	✓ Full exchange observed
09-19 06:45	40m	-18 / -12	ON8PR	-15 / -18	4	✓ Full exchange observed
09-19 06:41	40m	-22 / +5	F1PBZ	-14 / -	4	✓ Full exchange observed
09-19 06:38	40m	-22 / -5	DL7GAL	-2 / +10	6	✓ Full exchange observed
09-19 06:38	40m	-19 / -6	IK4TVP	-3 / -	3	✓ Closing observed
09-17 08:27	40m	-10 / -	R3WDW/P	- / -	2	Partial capture
09-17 08:24	40m	-10 / -	UA9JTJ/9	- / -	4	Partial capture
09-13 11:33	40m	-7 / -	YO3FVR/P	- / -	3	Partial capture
09-13 01:25	40m	- / -4	R5AV	-20 / -	2	✓ Closing fragment
08-01 14:37	20m	- / -	F4PCM	-10 / -	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
055845 -11  795  EU6KA ON4CFC RR73
055900  -5 1679  ON4CFC EU6KA 73
055915 -13  796  CQ ON4CFC JO21
055945  -8  795  SQ8ECJ ON4CFC -04 (x2)
060030 -18  797  ON4CFC SQ8ECJ 73
060300  +7  308  ON4CFC SP4MPH -09 (x2)
060345  -4  796  SP4MPH ON4CFC 73
060430 -23 1858  ON4CFC SP5DUJ R-12
060445  -8  795  SP5DUJ ON4CFC -25
060630 -10  795  VE9LS ON4CFC JO21 (x3)
060730 -23 1858  ON4CFC SP5DUJ RRR

20m

UTC    dB Audio  Message
143130 -24 1516  CQ ON4CFC JO21
143715  -8 1515  ON4CFC F4PCM JN23 (x2)
143900 -21 1515  CQ ON4CFC JO21 (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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