ON5AI — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving ON5AI, decoded by SO8OO in southeastern Poland. 733 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 36 UTC dates in the available aggregate history. Observed between 2026-06-19 and 2026-10-11.

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 733 FT8 messages attributed to ON5AI as the transmitting token by decoded message structure across 36 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 40 m (27%) and 80 m (23%). Most decodes (53%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

733

Messages attributed

UTC dates decoded

126

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 167 60m · 5 40m · 198 20m · 363

First attributed message: 2026-06-19
Last attributed message: 2026-10-11 04:46 UTC

Observed FT8 message patterns

Attributed sample: 733 messages
Active dates: 36 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -20 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 218, moderate (-15 to -9 dB) 262, strong (≥ -8 dB) 253.

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 ON5AI in decoded directed-looking exchanges:

GU4WRP · Guernsey ×2 HA7TM · Hungary ×2 IQ4JO · Italy ×2 G0BLB · England ×2 9J2FI · Zambia RM8L · Asiatic Russia 5B4AMX · Cyprus A93MO · Bahrain CO8LY · Cuba DK3TNA · Fed. Rep. of Germany DL2AOM · Fed. Rep. of Germany DL3RAJ · Fed. Rep. of Germany

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 ON5AI

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 · 495 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-10-11 04:46 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	ON5AI S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-11 04:46	80m	+14 / -1	MI0NWA	-14 / -	4	Partial capture
10-05 19:41	60m	-18 / -11	OH6FSO	-8 / -	7	Partial capture
10-05 19:37	60m	-15 / -12	OH6FSO	-8 / -14	5	✓ Full exchange observed
10-03 19:39	40m	-3 / -	CN8DN	- / -	2	Partial capture
10-02 05:23	40m	-9 / -	PV8AJ	- / -	3	Partial capture
10-02 05:19	40m	-11 / -	W5XO	- / -	2	Partial capture
10-02 05:06	40m	-6 / -	KS1WK	- / -17	4	✓ Closing fragment
10-02 05:04	40m	-3 / -	XE1JVO	- / -	3	Partial capture
09-30 21:12	40m	-8 / -1	IU4SQE	-14 / -	5	✓ Closing observed
09-26 04:47	60m	- / -	F5MXH	+1 / -	3	Partial capture
09-25 20:57	40m	-10 / -	SV9QWC	- / -	4	Partial capture
09-25 20:45	40m	-11 / +1	T77RN	-5 / -	12	Partial capture
09-25 20:42	40m	- / -	TA3NK	-16 / -	2	Partial capture
09-25 20:31	40m	-9 / -	CT7AXN	- / -15	3	Partial capture
09-25 20:24	40m	-15 / -	SP9RA	- / -20	2	Partial capture
09-23 19:13	40m	-10 / -9	9H4JX	-14 / -	5	✓ Closing observed
09-23 19:11	40m	-12 / -	R8PG/P	- / -25	2	✓ Closing fragment
09-21 20:14	40m	-1 / -	R2EA/P	- / -22	8	Partial capture
09-21 19:20	40m	0 / -	JI4JKO	- / -	9	Partial capture
09-18 10:02	10m	- / 0	RM8L	-13 / -	3	✓ Closing fragment
09-14 12:57	10m	- / -9	9J2FI	0 / -	2	✓ Closing fragment
09-13 19:43	40m	-4 / -	M7KWB/P	- / -	3	Partial capture
09-13 19:42	40m	+1 / -	G7VGY/P	- / -6	2	✓ Closing fragment
09-13 19:34	40m	-4 / -12	SV9QWC	-12 / -	3	Partial capture
09-13 19:30	40m	0 / -2	IK1MJK/P	-12 / -6	6	✓ Full exchange observed
09-13 19:24	40m	-8 / -	DF9HT/P	- / -	2	Partial capture
09-13 19:22	40m	-3 / -	EA3IWJ/P	- / -	3	Partial capture
09-13 19:19	40m	-7 / -13	R8CW	-4 / -	2	Partial capture
09-11 19:42	40m	-2 / -	SV9QWC	- / -	2	Partial capture
09-08 19:32	80m	- / -7	EA3HMM	-5 / -	2	✓ Closing fragment
09-08 19:28	80m	- / +4	GU4WRP	-15 / -	2	✓ Closing fragment
09-04 20:19	40m	0 / -	CN8NS	- / -	9	Partial capture
09-04 20:05	40m	- / -17	TA7MMI	+2 / -	2	✓ Closing fragment
09-04 19:15	40m	-6 / -	EK1KE	- / -22	6	Partial capture
09-04 18:41	40m	+1 / -11	MI5JYK	-14 / -20	4	✓ Full exchange observed
09-04 18:36	40m	0 / -13	SV9QWC	-11 / -	6	Partial capture
09-04 18:29	40m	-6 / -	4L6EZ	- / -	10	Partial capture
09-04 18:00	40m	-5 / -	C31KC	- / -	3	Partial capture
09-04 17:52	40m	-6 / -16	EX7CQ	-5 / -	5	✓ Closing observed
09-04 16:24	40m	-10 / -	EX7CQ	- / -	4	Partial capture
09-04 16:16	40m	-10 / -	DL8RO	- / -	3	Partial capture
09-04 16:13	40m	- / +10	LB5WB	-8 / -	3	✓ Closing fragment
09-04 15:53	40m	-8 / -	F4MOJ/P	- / -	2	Partial capture
09-04 15:24	40m	-10 / -	EX7CQ	- / -	5	Partial capture
09-03 05:25	40m	-11 / -	KS1WK	- / -	3	Partial capture
09-03 05:04	80m	-13 / -	KE4EB	- / -13	7	Partial capture
09-01 19:58	40m	- / -13	RX9WM	-11 / -	2	Partial capture
09-01 17:33	40m	-6 / -11	MM5WJF/P	-11 / -	2	Partial capture
08-30 21:18	40m	- / -16	TC30AUG	-12 / -	2	Partial capture
08-30 20:16	20m	-5 / -	4L7T	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
050545 -10  902  KE4EB ON5AI R-13 (x5)
192615  -4 1002  GU4WRP ON5AI JO21
192830 -15 1856  ON5AI GU4WRP +04 (x2)
193000  -8  262  ON5AI EA3HMM JN00 (x3)
044615 +14  552  MI0NWA ON5AI JO21
044630 -14  980  ON5AI MI0NWA -01 (x3)

60m

UTC    dB Audio  Message
044730  +1 2944  ON5AI F5MXH JN07 (x3)
193700  -6 2727  ON5AI OH6FSO -12
193745 -15 1082  OH6FSO ON5AI R-14
193800  -7 2727  ON5AI OH6FSO -12
193845 -15 1082  OH6FSO ON5AI R-14
193900 -10 2727  ON5AI OH6FSO RR73
194145 -18 1082  OH6FSO ON5AI JO21
194200  -5 2727  ON5AI OH6FSO -11 (x6)

40m

UTC    dB Audio  Message
050415  +1 1137  XE1JVO ON5AI JO21 (x3)
050630 -11 1138  KS1WK ON5AI JO21 (x4)
051945 -10 1137  W5XO ON5AI JO21 (x2)
052200  -5 1138  KG5EIU ON5AI JO21
052300  -7 1138  PV8AJ ON5AI JO21 (x3)
193915  -1 1187  CN8DN ON5AI JO21 (x2)

10m

UTC    dB Audio  Message
192245  +3  777  ON5AI Z61DX -03
125715  -4 2808  ON5AI 9J2FI -09 (x2)
100215 -20 1684  ON5AI RM8L MO27 (x3)

20m

UTC    dB Audio  Message
201330 +10 1022  CQ ON5AI JO21
201345  +4  377  ON5AI OO0O JO11
201400 +13 1022  CQ ON5AI JO21 (x2)
201445  -3 1248  ON5AI DL7RAY JO53
201500  +9 1022  CQ ON5AI JO21
201515  -8 1248  ON5AI DL7RAY JO53
201530 +12 1022  CQ ON5AI JO21
201545 -17 1248  ON5AI DL7RAY JO53
201600  +0 1022  4L7T ON5AI JO21
201615  -5 1248  ON5AI DL7RAY JO53 (x2)
201730  -8 1022  4L7T ON5AI JO21
201745  -9 1248  ON5AI DL7RAY JO53
201830  -6 1022  4L7T ON5AI JO21

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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