ON5ZZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO11

Receiver-side FT8 activity involving ON5ZZ, decoded by SO8OO in southeastern Poland. 817 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 22 UTC dates in the available aggregate history. Observed between 2026-06-08 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 817 FT8 messages attributed to ON5ZZ as the transmitting token by decoded message structure across 22 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 40 m (35%) and 80 m (14%). Most decodes (58%) fell within the six-hour window 02:00-08:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

817

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 115 40m · 287 20m · 407 10m · 8

First attributed message: 2026-06-08
Last attributed message: 2026-09-08 06:48 UTC

Observed FT8 message patterns

Attributed sample: 817 messages
Active dates: 22 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -14 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 49, moderate (-15 to -9 dB) 283, strong (≥ -8 dB) 485.

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 ON5ZZ in decoded directed-looking exchanges:

IZ4AIF · Italy ×2 IC8FKB · Italy YO3OBB · Romania BA3QIQ · China CT3MD · Madeira Islands DC5CH · Fed. Rep. of Germany DM3XD · Fed. Rep. of Germany EA4GM · Spain G8IXM · England KF9UG · United States KQ4MHD · United States OK2VCR · Czech Republic

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 ON5ZZ

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: JO11 · 598 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,331 km (approx.)
Last such locator decoded: 2026-09-08 06:48 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	ON5ZZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 06:41	40m	-11 / -15	ER1CW	-6 / -16	6	✓ Full exchange observed
09-08 06:40	40m	- / -	DK6WH	0 / -	3	Partial capture
09-08 06:29	40m	-7 / -	EA3RO	- / -14	2	✓ Closing fragment
09-08 06:25	40m	-9 / -4	EW6DM/P	-12 / -7	4	✓ Full exchange observed
09-08 06:04	40m	-6 / -	OK2PKT	- / -12	2	✓ Closing fragment
09-08 05:58	40m	-8 / -	N8MZN	- / -12	9	Partial capture
09-08 05:56	40m	-10 / 0	IZ4AIF	+16 / -	4	✓ Closing observed
09-08 05:48	40m	-1 / -17	KS4OT	-8 / -3	5	✓ Full exchange observed
09-08 05:45	40m	-2 / -	OK2JKO	- / -6	3	✓ Closing fragment
09-01 03:09	40m	+3 / -	UG4P	-20 / -12	4	✓ Closing observed
09-01 01:23	40m	+8 / -	K3JGJ	- / -	2	Partial capture
08-07 06:09	40m	- / -1	SP3IPA	-8 / -	2	Partial capture
08-07 04:42	40m	-10 / -9	ER1CW	-16 / -20	7	Partial capture
08-07 04:39	40m	-13 / -	IZ4AIF	-8 / -	2	✓ Closing observed
08-07 04:22	40m	-16 / -14	SP0DF	-18 / -8	3	Partial capture
08-07 04:19	40m	-14 / -	TA3NK	- / -10	2	Partial capture
08-07 04:07	40m	-14 / -	W5ART	- / -	2	✓ Closing fragment
08-07 03:58	40m	-12 / -	K2AKA	- / -12	9	Partial capture
08-07 03:56	40m	-10 / -	KN4WOJ	- / -13	2	✓ Closing fragment
08-07 03:52	40m	-12 / -	F5MYH	-23 / +2	3	✓ Closing observed
08-03 05:30	40m	-23 / -	I0WBX	- / -11	2	✓ Closing fragment
07-22 21:47	80m	- / -	CT1FSA	-18 / -	8	Partial capture
07-22 21:46	80m	-7 / +3	PI4DX	-4 / +3	5	✓ Full exchange observed
07-22 21:44	80m	- / -	9A60CBM	+14 / -	2	Partial capture
07-22 21:44	80m	- / -	F4BYA	+10 / -	2	Partial capture
07-22 21:42	80m	-6 / -1	DA6PM	-18 / -5	5	✓ Full exchange observed
07-22 21:40	80m	- / +2	DO9ST	-3 / -	3	✓ Closing fragment
07-22 21:39	80m	- / -	F4BYA	+8 / -	2	Partial capture
07-19 21:23	10m	- / -1	IC8FKB	-10 / -	2	✓ Closing fragment
07-19 21:21	10m	- / -2	YO3OBB	-20 / -	2	✓ Closing fragment
07-17 03:43	40m	-2 / -	KE8GDN	- / -15	2	✓ Closing fragment
07-17 03:37	40m	-6 / -	SV1TPO	- / -8	2	✓ Closing fragment
07-17 03:32	40m	-7 / -	KJ4QVJ	- / -9	3	✓ Closing fragment
07-17 03:30	40m	-8 / -	RN6MA	-6 / -9	3	✓ Closing observed
07-17 03:29	40m	-5 / -	N1NRL	- / -15	2	✓ Closing fragment
07-17 03:17	40m	-8 / -	KO4FQW	- / -17	2	✓ Closing fragment
07-17 03:13	40m	-8 / -	K0DD	- / -6	2	✓ Closing fragment
07-17 03:09	40m	-10 / -	K2AKA	- / -18	2	✓ Closing fragment
07-17 03:07	40m	-7 / -	KE2CUR	- / -20	2	✓ Closing fragment
07-17 03:05	40m	-8 / -	K5TU	- / -5	3	✓ Closing fragment
07-17 02:59	40m	-9 / -	OH3DJP	- / -18	2	✓ Closing fragment
07-17 02:56	40m	-8 / -	EA3CU	- / -7	2	✓ Closing fragment
07-10 22:06	80m	0 / -	EC1AOX	-19 / -13	4	✓ Closing observed
07-10 22:03	80m	+4 / -	DK4BP	-12 / -12	3	✓ Closing observed
07-10 21:59	80m	0 / -	DL6EBC	- / -5	2	✓ Closing fragment
07-10 21:59	80m	- / -	RA3WY	+4 / -	2	Partial capture
07-10 21:50	80m	+1 / -	CT1BWU	-3 / -10	13	✓ Closing observed
07-10 21:44	80m	+1 / +3	DB5HA	-17 / -10	16	✓ Full exchange observed
07-10 21:43	80m	-4 / +8	DL9PN	-1 / -6	5	✓ Full exchange observed
07-10 21:41	80m	-2 / +5	F5NIK	-18 / -10	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
064230  -5 1565  ON5ZZ ER1CW 73
064245  -9  599  CQ ON5ZZ JO11 (x6)
064530  +1  598  ON5ZZ DG9WH JO40
064545 -11  599  CQ ON5ZZ JO11 (x6)
023715 -22 1857  ON5ZZ R1943OD -07

20m

UTC    dB Audio  Message
044300 -13  580  CQ ON5ZZ JO11                         a1
044930  -7  580  OZ9TAN ON5ZZ RR73
045400  -9  580  CQ ON5ZZ JO11 (x10)
025100  -5  931  ON5ZZ XQ1KK FH41
025300 -24 1794  CQ ON5ZZ JO11
025500 -24 1837  KQ4MHD ON5ZZ RR73

80m

UTC    dB Audio  Message
214430  +0 1797  ON5ZZ DH8GV JO33
214430 +15  599  ON5ZZ 9A60CBM
214600  -9 1797  PI4DX ON5ZZ JO11
214615  -6 1045  ON5ZZ PI4DX +03
214630  -7 1797  PI4DX ON5ZZ R+03
214645  -2 1046  ON5ZZ PI4DX RR73
214700  -6 1797  PI4DX ON5ZZ 73
214730 -14 1797  ON5ZZ CT1FSA IM59 (x8)

10m

UTC    dB Audio  Message
203445  -8  648  PY8ZB ON5ZZ JO11 (x4)
124700  -6  639  CQ ON5ZZ JO11 (x2)
212115 -17 1540  ON5ZZ YO3OBB -02 (x2)
212345 -13 1456  ON5ZZ IC8FKB -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