F4BJN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN25

Receiver-side FT8 activity involving F4BJN, decoded by SO8OO in southeastern Poland. 7,436 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 65 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-30.

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 7,436 FT8 messages attributed to F4BJN as the transmitting token by decoded message structure across 65 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (62%), followed by 10 m (34%) and 40 m (4%). The busiest six-hour window was 16:00-22:00 UTC, containing 44% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

7,436

Messages attributed

UTC dates decoded

1,074

Active 15-min windows

-11 dB

Estimated median S/N

Bands

60m · 35 40m · 281 20m · 4,616 10m · 2,504

First attributed message: 2026-06-06
Last attributed message: 2026-08-30 13:05 UTC

Observed FT8 message patterns

Attributed sample: 7,436 messages
Active dates: 65 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -19.3 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,888, moderate (-15 to -9 dB) 2,737, strong (≥ -8 dB) 2,811.

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 F4BJN in decoded directed-looking exchanges:

4X5UK · Israel ×2 PS7KM · Brazil ×2 R6ZAJ · European Russia ×2 R7KGB · European Russia ×2 EA5SA · Spain ×2 M1GTR · England ×2 R4RY · European Russia ×2 R6SJ · European Russia ×2 HA7KJ · Hungary LU7WDM · Argentina LA1QAA · Norway G3ZDF · England

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 F4BJN

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: JN25 · 6,254 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,346 km (approx.)
Last such locator decoded: 2026-08-30 12:09 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	F4BJN S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 12:04	10m	-22 / -	OE3EVB	- / -	8	Partial capture
08-30 12:00	10m	-18 / -	4O6BLM	- / -	2	Partial capture
08-30 09:46	10m	-24 / -	ZS6BJU	- / -	2	Partial capture
08-28 07:50	10m	-23 / -4	DH3MFW	-10 / +3	5	✓ Full exchange observed
08-28 07:37	10m	-20 / -	ON6AA	- / -	2	Partial capture
08-28 07:17	10m	-22 / -	ON6AA	- / -	2	Partial capture
08-22 17:26	10m	-23 / -	PU3ULT	- / -18	4	Partial capture
08-22 12:29	10m	-15 / -	DO6ZZ	- / -	3	Partial capture
08-22 10:19	10m	-12 / -	LA8QW	- / -	2	Partial capture
08-22 10:13	10m	-13 / -	M7NTL	- / -	5	Partial capture
08-22 10:02	10m	-15 / -	OZ8ABA	- / -	3	Partial capture
08-22 09:57	10m	-12 / -	OZ8ABA	- / -	3	Partial capture
08-22 09:47	10m	-14 / -	OZ8ABA	- / -	5	Partial capture
08-22 09:26	10m	-19 / -	OK1MAT	- / -	2	Partial capture
08-22 09:16	10m	-18 / -	DG6IJM	- / -	3	✓ Closing fragment
08-22 09:10	10m	-13 / -	OK1STK	- / -	3	✓ Closing fragment
08-22 09:06	10m	-21 / -	SP6ZJB	- / -	4	Partial capture
08-22 09:03	10m	-14 / -	SQ2HL	- / -	5	Partial capture
08-22 08:58	10m	-18 / -	IU6UAM	- / -6	2	Partial capture
08-22 08:47	10m	-21 / -	IK6GTF	- / -	6	Partial capture
08-22 08:42	10m	-20 / -	SP8BQL	- / -	5	Partial capture
08-22 08:38	10m	-24 / -6	II7MGMU	-21 / -	2	Partial capture
08-22 08:28	10m	-14 / -	SQ9OE	- / -22	2	Partial capture
08-22 07:17	10m	-18 / -	SP1MWA	- / -	2	Partial capture
08-22 07:05	10m	-17 / -	IZ7BAS	- / -	4	Partial capture
08-21 16:29	10m	- / -2	DG0MG	-13 / -	3	✓ Closing fragment
08-21 15:40	10m	- / -16	PD4FLD	-20 / -	2	✓ Closing fragment
08-21 12:43	10m	-22 / -	DD4UG	- / -12	2	Partial capture
08-21 12:09	10m	-18 / -	YT6AAA	- / +7	3	✓ Closing fragment
08-21 11:59	10m	-22 / -1	DO5WG	-20 / -	4	✓ Full exchange observed
08-21 11:39	10m	-22 / -	S55KC	- / -	2	✓ Closing fragment
08-21 11:35	10m	-22 / -	F4LVS	- / -	2	Partial capture
08-21 11:31	10m	-20 / -	PD3ROB	- / +1	4	Partial capture
08-21 11:22	10m	-24 / -	EA7KNR	- / -	5	Partial capture
08-21 11:19	10m	-22 / -	R6WA	- / -	2	Partial capture
08-21 10:28	10m	-22 / -	<...>	- / -	4	Partial capture
08-21 07:54	10m	- / -23	R7RAG	-4 / -	2	✓ Closing fragment
08-20 16:07	10m	- / -	IW8XLD	-18 / -	2	Partial capture
08-20 07:28	10m	-23 / -	IV3VFP	- / -	2	Partial capture
08-20 07:18	10m	-18 / -	IZ3ERM	- / -	4	Partial capture
08-20 06:59	10m	-18 / -	SQ8OAU	- / -	4	Partial capture
08-20 06:30	10m	-23 / -	<...>	- / -18	3	Partial capture
08-20 06:23	10m	-24 / -	<...>	- / -	3	Partial capture
08-19 07:23	10m	- / -19	DH7ZP	-2 / -	3	✓ Closing fragment
08-19 07:08	10m	- / -23	DN9DSP	-5 / -	2	✓ Closing fragment
08-19 06:56	10m	- / -10	DN9CHV	-8 / -	2	✓ Closing fragment
08-19 06:35	10m	- / -16	LZ2CC	-20 / -	2	✓ Closing fragment
08-18 05:57	60m	- / +1	DL6II	-5 / -	2	Partial capture
08-18 04:16	60m	-22 / -	IT9FGA	- / -	2	Partial capture
08-18 03:36	60m	-16 / -	KD2BRV	- / -19	8	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
094745 -23 1968  ZS6BJU F4BJN JN25
113715 -19 1970  SQ5JBL F4BJN R-22
120045 -15 1969  4O6BLM F4BJN JN25 (x2)
120415 -24 1967  OE3EVB F4BJN JN25 (x10)
130515 -23 1968  <...> F4BJN R-15

60m

UTC    dB Audio  Message
032600  -4 1601  F4BJN SV2HTI -12 (x2)
033645 -19 1082  KD2BRV F4BJN JN25 (x8)
034845 -13  588  KO4ZHO F4BJN JN25
041615 -21 2034  IT9FGA F4BJN JN25 (x2)
055700  -5  771  F4BJN DL6II +01 (x2)

40m

UTC    dB Audio  Message
084345  -4 1041  F4BJN SP1KS RR73 (x2)
085345 -12 2105  F4BJN IV3HQK -07 (x2)
101415 -15 1880  F4BJN IK2WRO -17 (x2)
105945 -20 1322  F4BJN OE7NMI +19
111915 -23 1689  F4BJN DM8KM RR73
101930 -13  935  F4BJN SQ9ONX -18
211515 -24 1746  RW3C/P F4BJN JN25 (x2)
212045 -18 1077  IN3LHF F4BJN JN25 (x2)
212315 -22 1606  IU1NTO F4BJN JN25
213015 -12  309  <...> F4BJN JN25

20m

UTC    dB Audio  Message
200645 -10 1408  SP5TWA F4BJN JN25 (x3)
200915  -3  331  R7RAG F4BJN JN25
201145 -11 2067  YO0DA F4BJN JN25
201215  -5 2358  K2PS F4BJN JN25 (x3)
201345  +9  331  R7RAG F4BJN JN25 (x3)
201545  -6 1579  ON6AA F4BJN JN25 (x3)
202015 -18 1469  YO0DA F4BJN JN25

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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