K5XI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN64

Receiver-side FT8 activity involving K5XI, decoded by SO8OO in southeastern Poland. 47 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-13 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 47 FT8 messages attributed to K5XI as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (47%), followed by 80 m (32%) and 40 m (21%). Most decodes (100%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 15 40m · 10 20m · 22

First attributed message: 2026-06-13
Last attributed message: 2026-09-18 04:59 UTC

Observed FT8 message patterns

Attributed sample: 47 messages
Active dates: 7 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -17 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 25.

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 K5XI in decoded directed-looking exchanges:

PA4PA · Netherlands ×2 5B4ALJ · Cyprus F5MOO · France IN3WZS · Italy IU1TLG · Italy IZ8XJJ · Italy PY7FJ · Brazil T77NC · San Marino YL2KF · Latvia DK7UY · Fed. Rep. of Germany HB9ACA · Switzerland ON5PU · Belgium

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 K5XI

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: FN64 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,327 km (approx.)
Last such locator decoded: 2026-09-01 03:50 UTC

Other locator fields attributed to this token: DM52 (10).

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	K5XI S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-22 06:05	60m	- / -9	DK7UY	-9 / -	4	✓ Closing fragment
09-22 06:01	60m	- / +4	F4FQY	-16 / -	2	Partial capture
09-22 06:01	60m	- / -4	HB9ACA	-12 / -	4	✓ Closing fragment
09-22 06:01	60m	- / -	PA0EBG	-16 / -	2	✓ Closing fragment
09-22 05:59	60m	- / -20	ON5PU	-3 / -	5	✓ Closing fragment
09-22 05:58	60m	- / -	SP1ZMO	-4 / -	3	Partial capture
09-22 05:58	60m	- / -	EA7ST	-4 / -	2	Partial capture
09-22 05:57	60m	- / -4	PA4PA	+3 / -	6	✓ Closing fragment
09-22 05:25	80m	- / -	IK2QEI	-5 / -	3	Partial capture
09-21 05:55	40m	- / -	SP3EMA	-2 / -	2	Partial capture
09-21 05:51	40m	- / -	UT9NA	+5 / -	14	Partial capture
09-18 05:01	40m	- / -	DH3LAT	-4 / -	2	Partial capture
09-18 04:58	40m	- / -10	G4NKV/P	-7 / -	2	Partial capture
09-18 04:56	40m	- / -3	IN3WZS	0 / -	5	✓ Closing fragment
09-18 04:54	40m	- / -5	IZ8XJJ	-15 / -	3	✓ Closing fragment
09-18 04:53	40m	- / -	HB9TIH	-15 / -	3	Partial capture
09-18 04:52	40m	- / 0	F5MOO	-6 / -	4	✓ Closing fragment
09-18 04:52	40m	- / -4	PA4PA	+7 / -	4	✓ Closing fragment
09-18 04:51	40m	- / -13	YL2KF	-8 / -	2	✓ Closing fragment
09-17 23:23	160m	- / -	DL6TK	-11 / -	4	Partial capture
09-06 05:16	40m	- / -	IU5TPM	-4 / -	3	Partial capture
09-06 03:59	40m	- / -	IZ4JMA	-2 / -	2	Partial capture
09-06 03:58	40m	-10 / -	NE5TX	- / -	2	Partial capture
09-06 03:57	40m	-12 / -	PY7FJ	- / -4	2	✓ Closing fragment
09-06 03:53	40m	-11 / -7	T77NC	+4 / -24	5	✓ Full exchange observed
09-01 03:44	80m	- / -	IK5CHL	-1 / -	4	Partial capture
09-01 03:43	80m	-7 / -	RI1FJL	- / -	7	Partial capture
09-01 03:17	80m	-16 / -	RI1FJL	- / -	5	Partial capture
08-14 02:05	80m	- / -	DO1ID	+19 / -	3	Partial capture
07-23 03:49	40m	- / -7	S55DX	-9 / -	3	Partial capture
07-23 03:46	40m	- / -11	5B4ALJ	-5 / -	7	✓ Closing fragment
07-03 02:03	60m	- / -13	FP/KV1J	-16 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
060000  -4 1050  K5XI ON5PU JO21
060100 -17 1942  K5XI PA0EBG JO32
060100  -1 1050  K5XI ON5PU R-20
060100 -10 2026  K5XI HB9ACA JN36
060130 -14 1942  K5XI PA0EBG 73
060130  -1 1050  K5XI ON5PU 73
060130 -12 2026  K5XI HB9ACA JN36
060130 -17 2233  K5XI F4FQY +04 (x2)
060230 -13 2026  K5XI HB9ACA R-04 (x2)
060500 -10 1889  K5XI DK7UY JO44 (x4)

80m

UTC    dB Audio  Message
034415 -10 2294  RI1FJL K5XI FN64
034430  -1 1576  K5XI IK5CHL JN53
034445  -7 2294  RI1FJL K5XI FN64
034500  -4 1576  K5XI IK5CHL JN53
034515 -10 2294  RI1FJL K5XI FN64 (x2)
034700  +1 2052  K5XI IK5CHL JN53 (x2)
034745  -9 2229  RI1FJL K5XI FN64 (x2)
034915  -8 2229  RI1JFL K5XI FN64
035045  -6 2279  RI1FJL K5XI FN64
052515  -3 1416  K5XI IK2QEI JN45 (x3)

40m

UTC    dB Audio  Message
055245  +4 2188  K5XI UT9NA KN49 (x3)
055345 -17 1141  K5XI EI1DG R-06
055415  +6 2188  K5XI UT9NA KN49 (x4)
055545  -4  950  K5XI SP3EMA JO82
055615  +4 2188  K5XI UT9NA KN49
055615  -1  950  K5XI SP3EMA JO82
055645  +4 2188  K5XI UT9NA KN49 (x4)

160m

UTC    dB Audio  Message
232330 -10 2105  K5XI DL6TK JO42 (x4)

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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