K4XP — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM84

Receiver-side FT8 activity involving K4XP, decoded by SO8OO in southeastern Poland. 205 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 32 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-21.

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 205 FT8 messages attributed to K4XP as the transmitting token by decoded message structure across 32 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (42%), followed by 40 m (38%) and 80 m (20%). Most decodes (96%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

205

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 41 40m · 77 20m · 87

First attributed message: 2026-06-07
Last attributed message: 2026-10-21 04:08 UTC

Observed FT8 message patterns

Attributed sample: 205 messages
Active dates: 32 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -19 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 49, moderate (-15 to -9 dB) 62, strong (≥ -8 dB) 94.

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 K4XP in decoded directed-looking exchanges:

PA4PA · Netherlands ×3 SP6JIU · Poland ×2 DC7LR · Fed. Rep. of Germany EA4HOS · Spain LZ3RG · Bulgaria N1MRE · United States PD1ADA · Netherlands SQ6IMG · Poland TJ1GD · Cameroon UN0GY · Kazakhstan UT4EK · Ukraine W6EEN/P · United States

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 K4XP

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: EM84 · 88 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,079 km (approx.)
Last such locator decoded: 2026-09-16 02:26 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	K4XP S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 00:08	60m	- / -12	PA4PA	+10 / -	2	✓ Closing fragment
10-21 04:08	80m	- / -	IK1AIL	-8 / -	7	Partial capture
10-21 04:07	80m	- / -5	DL1SMA	+15 / -	5	✓ Closing fragment
10-21 04:06	80m	-13 / -21	IK4TVP	+6 / -19	5	Partial capture
10-21 04:06	80m	- / -	SP7ENW	+1 / -	5	Partial capture
10-21 04:05	80m	- / -9	F4EGM	+10 / -	3	✓ Closing fragment
10-21 04:05	80m	- / -18	DO1ID	+8 / -	3	✓ Closing fragment
10-21 04:04	80m	-12 / -2	MI0NWA	0 / -14	4	✓ Full exchange observed
09-28 02:24	80m	- / -	OK1XV	+17 / -	3	Partial capture
09-28 02:20	80m	- / -	OK1XV	+14 / -	3	Partial capture
09-16 02:27	80m	- / -10	SQ9DJQ	-13 / -	5	Partial capture
09-16 02:26	80m	-14 / -14	PA4PA	-4 / -12	5	✓ Full exchange observed
09-15 02:46	60m	- / -21	DL1UDO	-5 / -	3	Partial capture
09-15 02:04	80m	- / -15	E75C	-4 / -	4	Partial capture
09-15 01:24	80m	- / -	DL2DT	-2 / -	2	Partial capture
09-14 01:37	80m	- / -	SP4NDY	+6 / -	3	Partial capture
09-14 01:36	80m	-10 / -11	SP6JIU	+25 / -16	4	✓ Full exchange observed
09-14 01:35	80m	- / -	G8OO	-13 / -	9	Partial capture
09-14 01:34	80m	-11 / 0	PI4DX	+7 / -6	5	✓ Full exchange observed
09-14 01:00	80m	- / -	SP3BVI	+1 / -	2	Partial capture
09-11 00:10	60m	- / -13	GI4SNA	-2 / -	3	✓ Closing fragment
09-10 01:42	60m	- / -25	ER3ZW	-12 / -	2	✓ Closing fragment
09-10 00:20	60m	- / -14	PA4PA	+6 / -	2	✓ Closing fragment
09-09 03:25	80m	- / -	YO9IAB	+13 / -	3	Partial capture
09-09 03:24	80m	- / -	YO3GNF	-9 / -	5	Partial capture
09-09 03:23	80m	- / -21	OE100OEVSV	+8 / -	2	Partial capture
09-06 00:41	80m	-17 / -	AE2NY	- / -	4	Partial capture
09-06 00:34	80m	- / -18	SP4WJ	-1 / -	9	✓ Closing fragment
09-06 00:31	80m	-21 / -	W8WMU	- / -24	3	Partial capture
09-04 01:23	80m	-20 / -	AC9A	- / +7	2	✓ Closing fragment
09-04 01:21	80m	-18 / -	N9VFR	- / -	5	Partial capture
09-01 02:37	40m	-4 / -8	R6DZL	-8 / -6	6	✓ Full exchange observed
08-28 03:44	40m	-5 / -	RI1FJL	- / -	14	Partial capture
08-27 19:47	20m	- / -	DL1SVA	-16 / -	2	Partial capture
08-27 14:46	20m	- / -	F5PBG	-15 / -	3	Partial capture
08-26 21:13	20m	-2 / -	N1MRE	- / +7	4	✓ Closing fragment
08-25 02:26	20m	-2 / -	UT4EK	- / -2	2	✓ Closing fragment
08-25 02:23	20m	-4 / -	LZ3RG	- / -4	2	✓ Closing fragment
08-25 02:22	20m	-7 / -	W6EEN/P	- / -18	2	Partial capture
08-25 02:19	20m	-9 / -	UN0GY	- / -12	5	✓ Closing fragment
08-25 02:17	20m	-11 / -	TJ1GD	- / -7	4	✓ Closing fragment
08-24 02:33	80m	-24 / -	F5RRS	- / -	2	Partial capture
08-24 02:32	80m	- / -13	9A5JU	-10 / -	2	Partial capture
08-24 02:32	80m	- / -	F8TRT	-1 / -	2	Partial capture
08-24 02:30	80m	-24 / -7	SP3SLA	+20 / -11	6	✓ Full exchange observed
08-24 02:27	80m	-17 / -11	SP6JIU	+26 / -	3	✓ Closing observed
08-24 01:23	40m	-14 / -	NW8D	- / -10	3	✓ Closing fragment
08-24 01:20	40m	-16 / -	W9IKE	- / -	2	✓ Closing fragment
08-20 01:23	40m	-8 / -	KJ5CYH	- / -	3	Partial capture
08-20 00:39	40m	-17 / -	KA5CRL	- / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
004430 -13  929  K4XP GB8VJ -18 (x2)
002030  +6  256  K4XP PA4PA -14 (x2)
002230 -16 1527  K4XP OS4K -15
014200 -10 1533  K4XP ER3ZW -25 (x2)
001030  -4  980  K4XP GI4SNA -13 (x3)
024645  -3 1379  K4XP DL1UDO -21 (x3)
000845 +13  393  K4XP PA4PA -12 (x2)

80m

UTC    dB Audio  Message
040800  -1 2429  K4XP SP7ENW JO91
040800  -5 1197  K4XP IK1AIL JN45
040800 +18 2767  K4XP DL1SMA JN48
040815 -13  781  IK4TVP K4XP R-19
040830  +3 2429  K4XP SP7ENW JO91
040830 +17 2767  K4XP DL1SMA JN48
040900  -5 1198  K4XP IK1AIL JN45
040900 +13 2767  K4XP DL1SMA R-05
040930  -5 1198  K4XP IK1AIL JN45
040930 +14 2767  K4XP DL1SMA 73
041000 -10 1198  K4XP IK1AIL JN45 (x4)
003715  +4 2414  K4XP SP7ENW JO91

40m

UTC    dB Audio  Message
034815  -8 1944  RI1FJL K4XP EM84 (x6)
023645  -5 2570  CQ K4XP EM84
023700  -1 2041  K4XP R6DZL LN04
023700  -1 2570  K4XP R3KED -11
023715  -5 2570  R6DZL K4XP -06
023730 -11 2041  K4XP R6DZL R-08
023745  -3 2570  R6DZL K4XP -06
023800 -12 2041  K4XP R6DZL R-08
023815  -3 2570  R6DZL K4XP RR73
234900 -10 2496  AB8KP K4XP R+13

20m

UTC    dB Audio  Message
022345  -3 2075  LZ3RG K4XP -04 (x2)
022545  +1 2075  W6EEN/P K4XP RR73
022645  +0 2075  UT4EK K4XP -02 (x2)
211330  -5 2580  N1MRE K4XP EM84 (x4)
144630 -17 2198  K4XP F5PBG IN78 (x3)
194715 -17 1113  K4XP DL1SVA JO64 (x2)
203345 -11 2606  K4XP M7VME IO83

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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