ON4MAP — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON4MAP, decoded by SO8OO in southeastern Poland. 14,758 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 103 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 14,758 FT8 messages attributed to ON4MAP as the transmitting token by decoded message structure across 103 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (64%), followed by 40 m (36%). Most decodes (80%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

14,758

Messages attributed

103

UTC dates decoded

1,487

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 9,386 40m · 5,372

First attributed message: 2026-06-06
Last attributed message: 2026-09-21 03:54 UTC

Observed FT8 message patterns

Attributed sample: 14,758 messages
Active dates: 103 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -23 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6,689, moderate (-15 to -9 dB) 5,981, strong (≥ -8 dB) 2,088.

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 ON4MAP in decoded directed-looking exchanges:

PI4DX · Netherlands ×9 9A3AUH · Croatia ×8 DL1UDO · Fed. Rep. of Germany ×8 F5RRS · France ×8 HA7TM · Hungary ×7 MI0NWA · Northern Ireland ×7 MI0OBC · Northern Ireland ×7 OK1HEH · Czech Republic ×7 SP6JIU · Poland ×7 DO5HOK · Fed. Rep. of Germany ×7 9A5E · Croatia ×6 9A9TT · Croatia ×6

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 ON4MAP

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 · 12,029 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,194 km (approx.)
Last such locator decoded: 2026-09-21 03:54 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	ON4MAP S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 03:49	80m	-14 / -2	HF100PKP	+8 / -22	2	Partial capture
09-21 03:49	80m	-20 / -	SO100PKP	- / +10	2	Partial capture
09-21 03:44	80m	-18 / -9	HB9EKJ	-17 / -3	3	✓ Full exchange observed
09-21 03:33	80m	-14 / -	KY4WI	- / -	5	Partial capture
09-21 03:32	80m	-14 / +9	DO1ID	+12 / -	4	✓ Full exchange observed
09-21 03:30	80m	-15 / -	UT4NY	- / -	3	Partial capture
09-21 03:24	80m	-18 / -5	DL1YAU	-8 / -	3	✓ Closing observed
09-21 03:21	80m	-8 / -21	E75FM	+4 / -	7	Partial capture
09-21 03:16	80m	-14 / 0	DO1DX	+12 / -	5	✓ Full exchange observed
09-21 03:07	80m	-14 / -	F4IIX	- / -	5	Partial capture
09-21 03:04	80m	-10 / -	RQ6B	- / -	5	Partial capture
09-21 03:02	80m	-8 / -	EB3DBR	- / -	4	Partial capture
09-21 02:59	80m	-6 / +1	DL6LAY	-12 / -5	4	Partial capture
09-21 02:57	80m	-12 / -12	S58MU	+10 / -10	4	✓ Full exchange observed
09-21 02:51	80m	-6 / -4	OH2XX	+9 / +9	3	Partial capture
09-21 02:49	80m	-10 / -	R2PE	- / -	2	Partial capture
09-21 02:38	80m	-16 / -	R1DM	- / -	4	Partial capture
09-21 02:29	80m	-15 / -	RV4CC	- / -	2	Partial capture
09-21 02:17	80m	-15 / -	R6FY	- / -	6	Partial capture
09-21 02:14	80m	-10 / -	IS0AFM	- / -	4	Partial capture
09-21 02:11	80m	-10 / -	SQ6ELK	- / -	5	Partial capture
09-21 02:04	80m	-12 / -	R9FFX	- / -	3	Partial capture
09-21 02:03	80m	-10 / -	EA7JIG	- / -14	2	Partial capture
09-21 01:59	80m	-9 / -	R9JX	-5 / -24	6	✓ Closing observed
09-21 01:57	80m	-18 / -	C31KC	- / -	4	Partial capture
09-21 01:48	80m	-16 / -16	UT1XU	+12 / -4	5	✓ Full exchange observed
09-21 01:42	80m	-11 / -	W3DQS	- / -	3	Partial capture
09-21 01:40	80m	-13 / -15	SV9MBH	-2 / -19	6	✓ Full exchange observed
09-21 01:37	80m	-13 / -1	SM7OYP	+14 / -	5	✓ Full exchange observed
09-21 01:35	80m	-11 / -	UA4HJ	- / -	3	Partial capture
09-21 01:29	80m	- / +2	DM9EE	+4 / -	2	✓ Closing fragment
09-21 01:17	80m	-10 / -	W2CG	- / -	4	Partial capture
09-21 01:14	80m	-6 / -	R4OF	- / -	3	Partial capture
09-21 00:51	80m	-16 / -	CX6VM	- / -	2	Partial capture
09-21 00:49	80m	-16 / -5	9A3AUH	0 / -8	4	✓ Full exchange observed
09-21 00:39	80m	-16 / -	RX6DA	- / -	6	Partial capture
09-21 00:36	80m	-20 / -	SQ2HEB	- / -	6	Partial capture
09-21 00:33	80m	-16 / -	RA6OQ	- / -	4	Partial capture
09-21 00:25	80m	-9 / -	N1IWP	- / -	4	Partial capture
09-21 00:21	80m	-12 / -	R2EA/P	- / -	4	Partial capture
09-21 00:10	80m	-9 / -	R9OAE	- / -	6	Partial capture
09-21 00:07	80m	-14 / -	EA5HM	- / -	6	Partial capture
09-21 00:05	80m	-11 / -15	EW8CW	+4 / 0	6	✓ Full exchange observed
09-21 00:02	80m	-5 / -	KB2UKA	- / -	6	Partial capture
09-20 23:59	80m	-12 / -	IK8WEJ	- / -	4	Partial capture
09-20 23:57	80m	-13 / -	IW9FRA	- / -	4	Partial capture
09-20 23:47	80m	-20 / -11	M1AQR	-2 / +1	5	✓ Full exchange observed
09-20 23:38	80m	-7 / -1	DG1KPC	+3 / +4	5	✓ Full exchange observed
09-20 23:32	80m	-7 / -	RO7F	- / -	3	Partial capture
09-20 23:31	80m	-16 / -11	GM1TGY	-3 / +2	3	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
034130 -13 1083  CQ ON4MAP JO20 (x4)
034415 -12 1375  ON4MAP HB9EKJ -09
034430 -18 1082  HB9EKJ ON4MAP R-03
034445 -22 1375  ON4MAP HB9EKJ RR73
034745 -18 1382  CQ ON4MAP JO20 (x3)
034915 -17 1382  SO100PKP ON4MAP JO20
034930  +8 1265  ON4MAP HF100PKP -02
034945 -24 1382  SO100PKP ON4MAP R+10
035115 -14 1383  HF100PKP ON4MAP R-22
035430 -18 1382  CQ ON4MAP JO20

40m

UTC    dB Audio  Message
023015 -22 1397  RX6DA ON4MAP JO20 (x2)
024515  -5 1138  ON4MAP RA6FRI -15
024530 -17 1137  SV1EAG ON4MAP JO20 (x3)
025915 -22 1137  DL8TT ON4MAP JO20 (x2)
030215 -23 1137  N3YPL ON4MAP JO20 (x2)
204030  -1 1902  ON4MAP DL6NDN -04 (x5)

60m

UTC    dB Audio  Message
232345 -12  895  ON4MAP MM6EJO -14

20m

UTC    dB Audio  Message
060800 -21 2026  ON4MAP IK4RVY -12 (x5)

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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