9A4N — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving 9A4N, decoded by SO8OO in southeastern Poland. 563 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 40 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-20.

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 563 FT8 messages attributed to 9A4N as the transmitting token by decoded message structure across 40 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (57%), followed by 80 m (26%) and 20 m (11%). Most decodes (59%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was -1.5 dB.

Overview

563

Messages attributed

UTC dates decoded

Active 15-min windows

-1.5 dB

Estimated median S/N

Bands

160m · 29 80m · 148 40m · 323 20m · 63

First attributed message: 2026-06-07
Last attributed message: 2026-09-20 22:31 UTC

Observed FT8 message patterns

Attributed sample: 563 messages
Active dates: 40 UTC dates
Estimated median S/N: -1.5 dB
Estimated 10th-90th percentile: -15 to +12.9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 50, moderate (-15 to -9 dB) 90, strong (≥ -8 dB) 423.

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 9A4N in decoded directed-looking exchanges:

DL1IP · Fed. Rep. of Germany IV3KNT · Italy OM3SX · Slovak Republic OZ6ABA · Denmark RI1FJZ · Franz Josef Land SP9AU · Poland US2YW · Ukraine 7Q7EB · Malawi IZ2SXZ · Italy JH5HDA · Japan K5MGY · United States VA3ZK · Canada

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 9A4N

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 · 353 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 708 km (approx.)
Last such locator decoded: 2026-09-20 22:30 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	9A4N S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 22:33	160m	- / -	DO5HB	-10 / -	2	Partial capture
09-20 22:30	160m	+7 / -	RI1FJZ	-12 / -23	5	✓ Closing observed
09-15 21:43	160m	-1 / +4	SP9AU	-16 / -13	5	✓ Full exchange observed
09-15 21:41	160m	+4 / +2	OM3SX	-2 / -7	4	✓ Full exchange observed
09-15 21:40	160m	+4 / -2	DL1IP	-20 / -14	5	✓ Full exchange observed
09-15 21:39	160m	0 / -	RA9ACA	- / -	2	Partial capture
09-15 20:35	160m	-1 / -5	US2YW	+6 / 0	5	✓ Full exchange observed
09-15 20:34	160m	0 / -	IV3KNT	-14 / -	4	✓ Closing observed
09-15 20:32	160m	-4 / +4	OZ6ABA	-6 / -15	5	✓ Full exchange observed
09-13 08:09	40m	0 / -	F5OYA/P	- / -13	2	✓ Closing fragment
09-13 08:06	40m	+1 / -	PD9T	- / -16	3	✓ Closing fragment
09-13 08:04	40m	+1 / -	F6FHZ	- / -20	2	✓ Closing fragment
09-13 08:03	40m	-2 / -	IU8RFW	-20 / -	2	✓ Closing observed
09-13 08:01	40m	0 / -	CT4VB	- / -23	3	✓ Closing fragment
09-12 21:35	40m	-20 / -	EA8CZ	- / -16	3	✓ Closing fragment
09-12 21:34	40m	-22 / -	OK2BRV	- / -12	2	Partial capture
09-12 21:31	40m	-22 / -	LU2HYL	- / -	2	Partial capture
09-12 19:49	40m	+1 / -	R4AFR	- / -23	4	✓ Closing fragment
09-12 19:48	40m	+6 / -	OE7LVI	- / -3	2	Partial capture
09-10 06:44	40m	- / -	UX2QX	-12 / -	4	Partial capture
09-10 06:43	40m	-8 / -	J38DX	- / -14	3	✓ Closing fragment
09-10 06:36	40m	-10 / -	IS0AAS	- / -11	5	✓ Closing fragment
09-06 17:20	40m	+7 / -13	G4DBW	-11 / -	2	✓ Closing observed
09-06 17:16	40m	+2 / -	VJ6X	- / -16	7	✓ Closing fragment
09-05 16:44	40m	+1 / -	3B8GL	- / -25	6	Partial capture
09-04 23:01	80m	+8 / -	WP3R	- / -	6	Partial capture
09-04 22:54	80m	+17 / -	TF3VS	- / -10	10	✓ Closing fragment
09-04 19:10	80m	+12 / -	JF8QNF	- / -15	2	✓ Closing fragment
09-04 19:08	80m	+16 / -	BA5AN	- / -23	5	✓ Closing fragment
09-04 18:59	80m	+14 / -4	F5PBG	-6 / -8	5	✓ Full exchange observed
09-04 18:58	80m	+11 / -	UD8S	- / -19	3	✓ Closing fragment
09-03 04:54	40m	+2 / -	OA4CVQ	- / -	2	Partial capture
09-03 04:51	40m	-4 / -	OA4CVQ	- / -	2	Partial capture
09-03 04:49	40m	-1 / -	AB9PM	- / -5	4	✓ Closing fragment
09-03 04:46	80m	+11 / -	KE4EB	- / -	6	Partial capture
09-03 04:38	40m	+3 / -	W8JRK	- / -14	3	✓ Closing fragment
09-02 21:20	80m	+3 / -8	V51WH	-10 / -12	10	✓ Full exchange observed
09-01 23:33	40m	-2 / -	N1EDF	- / -24	3	Partial capture
09-01 23:32	40m	-2 / -	KS1WK	- / -	2	Partial capture
09-01 21:22	40m	-8 / -	VK3DRN	- / -15	4	✓ Closing fragment
08-31 22:17	40m	-3 / -	NP4PR	- / -	9	Partial capture
08-31 21:24	40m	-17 / -21	OK1WCF	-22 / -15	5	✓ Full exchange observed
08-31 21:24	40m	- / -	YO3GNF	+2 / -	2	Partial capture
08-31 21:19	40m	-5 / -	VK7AC	- / -7	7	✓ Closing fragment
08-31 20:26	80m	+11 / +8	OH6Z	-10 / -13	12	✓ Full exchange observed
08-30 20:57	80m	- / -12	HB9EKJ	-16 / -	7	Partial capture
08-30 20:53	80m	+12 / -	HB9EKJ	- / -	3	Partial capture
08-29 20:36	80m	+17 / -	GB0SL	- / -17	4	✓ Closing fragment
08-29 20:33	80m	+12 / -	DO2SHX	-6 / -17	3	✓ Closing observed
08-29 20:33	80m	+14 / -	R3PLA	+2 / -6	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
214345 -14 1796  9A4N SP9AU R+04
214400  +0 1560  SP9AU 9A4N RR73
214415 -17 1796  9A4N SP9AU 73
214430  +4 1560  CQ 9A4N JN75 (x5)
223015  -4 1918  RI1FJZ 9A4N JN75 (x3)
223130 -12  787  9A4N RI1FJZ RR73
223145  +8 1918  RI1FJZ 9A4N 73
223330 -11  927  9A4N DO5HB JO40 (x2)

40m

UTC    dB Audio  Message
214000 -17 2039  CQ 9A4N JN75                          a1
214015  +7 2040  9A4N DL7ACA JO40
075715 +11 2981  OH6IH 9A4N JN75
080115  +0 1133  CT4VB 9A4N JN75 (x3)
080315  -2 1133  IU8RFW 9A4N RR73
080330 -20 1133  9A4N IU8RFW 73
080415  +1 1133  F6FHZ 9A4N -20 (x2)
080600  +1 1133  PD9T 9A4N JN75 (x3)
080900  +0 1133  F5OYA/P 9A4N -13 (x2)

80m

UTC    dB Audio  Message
225445 +24 2816  TF3VS 9A4N JN75 (x9)
230145  +4 2178  WP3R 9A4N JN75 (x6)

20m

UTC    dB Audio  Message
214945  -9 1971  7Q7EB 9A4N JN75 (x5)
215315  -5 1971  YV5AEZ 9A4N JN75 (x6)
215615  -8 1971  WB3JUV 9A4N JN75 (x2)
215715  -8 1971  HK4LGH 9A4N JN75 (x2)

10m

UTC    dB Audio  Message
193645  -3 1086  9A4N UR9QQ KN77 (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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