9A4AA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Croatia Most frequent locator attributed to this token: JN75

Receiver-side FT8 activity involving 9A4AA, decoded by SO8OO in southeastern Poland. 16,322 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 47 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-18.

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 16,322 FT8 messages attributed to 9A4AA as the transmitting token by decoded message structure across 47 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (35%), followed by 20 m (31%) and 60 m (12%). The busiest six-hour window was 18:00-00:00 UTC, containing 46% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (65%); the estimated median was -6 dB.

Overview

16,322

Messages attributed

UTC dates decoded

1,071

Active 15-min windows

-6 dB

Estimated median S/N

Bands

160m · 1,428 80m · 1,597 60m · 1,952 40m · 5,740 20m · 5,007 10m · 598

First attributed message: 2026-06-08
Last attributed message: 2026-09-18 03:54 UTC

Observed FT8 message patterns

Attributed sample: 16,322 messages
Active dates: 47 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -15 to +3.8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,248, moderate (-15 to -9 dB) 4,480, strong (≥ -8 dB) 10,594.

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 9A4AA in decoded directed-looking exchanges:

M9VVE · England ×5 HA1ZW · Hungary ×5 DL9KM · Fed. Rep. of Germany ×4 F4HSB · France ×4 IK1MJK/P · Italy ×3 IK4LZH · Italy ×3 LY1DY · Lithuania ×2 DK2DB · Fed. Rep. of Germany ×2 SP5GW · Poland ×2 AO5FSB · Spain ×2 DJ7LWD · Fed. Rep. of Germany ×2 F4VTR · France ×2

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 9A4AA

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: JN75 · 15,415 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 708 km (approx.)
Last such locator decoded: 2026-09-18 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	9A4AA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 03:34	160m	-13 / -22	SP7ENZ	-16 / -17	6	Partial capture
09-18 03:16	160m	- / -16	F1PBZ	-2 / -	2	Partial capture
09-18 03:13	160m	0 / -15	OK6MV	+15 / -1	5	✓ Full exchange observed
09-18 03:04	160m	-11 / -22	DL1VVQ	-6 / -14	5	Partial capture
09-18 02:56	160m	-14 / -22	DL1VVQ	-2 / -17	6	✓ Full exchange observed
09-18 02:48	160m	-14 / -17	DL1VVQ	-4 / -14	6	Partial capture
09-18 02:16	160m	- / -17	F1PBZ	-6 / -	7	Partial capture
09-18 01:51	160m	- / -15	F1PBZ	-1 / -	6	Partial capture
09-18 01:14	160m	- / -17	F1PBZ	-4 / -	6	Partial capture
09-18 01:03	160m	- / -	HA3KZ	-8 / -	3	Partial capture
09-18 00:48	160m	- / -13	F1PBZ	-1 / -	6	Partial capture
09-18 00:15	160m	- / -	DL4KSD	-16 / -	2	Partial capture
09-17 23:51	160m	- / -20	F1PBZ	-2 / -	6	Partial capture
09-17 23:39	160m	-14 / -18	PE5TDM	+1 / -14	7	✓ Full exchange observed
09-17 23:14	160m	- / +5	F1PBZ	0 / -	7	Partial capture
09-17 22:39	160m	-15 / -17	DK2DB	-10 / -	4	✓ Closing observed
09-17 21:45	160m	- / -13	OK2JNX	-8 / -	4	✓ Closing fragment
09-17 21:22	160m	-10 / -	SP9HPI	0 / -17	4	Partial capture
09-17 20:34	160m	- / -22	IU3RRX	+1 / -	6	✓ Closing fragment
09-17 20:12	160m	-21 / -	OM3TSA	-6 / -10	3	Partial capture
09-17 19:19	160m	- / -24	OK1DXR	-5 / -	3	✓ Closing fragment
09-17 04:52	40m	0 / -	GM0OPS	-12 / -14	3	✓ Closing observed
09-17 04:33	40m	-2 / -	EC4DJB	- / -17	2	✓ Closing fragment
09-17 03:31	40m	- / -	NJ2RQ	-20 / -	2	Partial capture
09-17 02:52	40m	- / -	RZ6ALZ	-3 / -	2	Partial capture
09-17 01:26	40m	- / -20	RC9WC	-19 / -	5	✓ Closing fragment
09-16 23:36	40m	- / -	GJ6WRI	0 / -	2	Partial capture
09-16 22:49	40m	0 / -	OD5ZZ	- / -15	2	✓ Closing fragment
09-16 22:07	40m	-11 / -	DA0O	-8 / -	4	✓ Closing observed
09-16 21:53	40m	+2 / -	M0JEK	+9 / -13	5	Partial capture
09-16 21:20	40m	- / -5	OZ1LGJ	-10 / -	3	✓ Closing fragment
09-16 21:07	40m	- / -18	PD0RCQ	+5 / -	3	✓ Closing fragment
09-16 20:59	40m	- / -	PD0RCQ	+9 / -	5	Partial capture
09-16 20:58	40m	- / -	ON5LC	-4 / -	2	Partial capture
09-16 20:46	40m	- / -	M6MYC	-10 / -	3	Partial capture
09-16 20:35	40m	- / 0	PD1RO	+3 / -	3	✓ Closing fragment
09-16 20:24	40m	- / -	GM0AVB	-7 / -	3	Partial capture
09-16 20:14	40m	- / -	M7HET	0 / -	2	Partial capture
09-16 20:07	40m	- / -	ON5AT	-4 / -	4	Partial capture
09-16 20:07	40m	- / +1	UB1AVZ/P	-9 / -	2	Partial capture
09-16 20:06	40m	-6 / -8	LZ2BC	-13 / -18	4	✓ Full exchange observed
09-16 20:01	40m	0 / -	F3CJ	- / -17	2	Partial capture
09-15 03:10	40m	- / -15	OD5XX	-1 / -	2	✓ Closing fragment
09-15 02:50	40m	- / -11	KD3BVL	-16 / -	2	✓ Closing fragment
09-15 02:16	40m	- / -21	KC1YXS	-4 / -	2	Partial capture
09-15 00:49	40m	- / -2	MW7RHR	-4 / -	3	✓ Closing fragment
09-14 23:07	40m	- / -	R3SN	-4 / -	2	Partial capture
09-14 22:03	40m	- / -	OZ1LGJ	-2 / -	4	Partial capture
09-14 21:15	40m	- / -	I0KJX	-4 / -	6	Partial capture
09-14 20:54	40m	- / -	PH7GD	-6 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
034245 -10  571  CQ 9A4AA JN75 (x15)

40m

UTC    dB Audio  Message
045545  -6  533  CQ 9A4AA JN75 (x15)

80m

UTC    dB Audio  Message
185830 -10 1245  CQ 9A4AA JN75 (x15)

60m

UTC    dB Audio  Message
054345  -8  597  CQ 9A4AA JN75 (x15)

20m

UTC    dB Audio  Message
200715  -3  449  CQ 9A4AA JN75 (x2)
200800  -2 1564  9A4AA EA1BRT IN73
200815  +1  450  EA1BRT 9A4AA -15 (x2)
200930  -1 1921  9A4AA EA1BRT IN73
201115  -2  449  CQ 9A4AA JN75 (x8)
203400  -5  450  9A4AA G8GDS -06

10m

UTC    dB Audio  Message
134945 -18  850  CQ 9A4AA JN75 (x3)
135715 -13  850  G8WVB 9A4AA RR73
135845 -15  850  CQ 9A4AA JN75 (x5)
140445 -14  850  G3MTL 9A4AA -19
140845 -12  850  CQ 9A4AA JN75
140945 -14  850  DA6TT 9A4AA RR73
141015 -15  850  CQ 9A4AA JN75                         a1 (x3)

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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