4X1UF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Israel Locator transmitted in a decoded message: KM72

Receiver-side FT8 activity involving 4X1UF, decoded by SO8OO in southeastern Poland. 23,535 related FT8 messages, 20,562 CQ messages, observed on 80m, 60m, 40m, 20m, 10m, across 81 UTC dates. Heard between 2026-05-26 and 2026-08-24.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

23,535

Related messages

20,562

CQ messages

UTC dates heard

-8 dB

Mean decoder S/N

Bands

80m 20m 40m 60m 10m

First seen: 2026-05-26
Last seen: 2026-08-24 02:43 UTC

Frequent QSO partners observed at SO8OO

Stations 4X1UF worked most often, as logged from our receiver:

UK8FCM · Uzbekistan ×5 TA3NK · Asiatic Turkey ×4 PD2WL · Netherlands ×4 MW3LFL · Wales ×3 OZ1LDO · Denmark ×3 M0PEL · England ×3 TA2ED · Asiatic Turkey ×3 TA7ARH · Asiatic Turkey ×3 N4LOV · United States ×3 UR5YPV · Ukraine ×3 F1IQH · France ×3 PD0RCQ · Netherlands ×3

Activity Heatmap

Locator transmitted by 4X1UF

Approximate centre of KM72, decoded 2026-08-24 04:15 UTC. A transmitted locator is not proof of the operator's permanent location.

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	4X1UF S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-24 04:41	40m	- / -19	E79KO	+2 / -	4	✓ Closing fragment
08-24 03:11	40m	-15 / -	KI5NHZ	- / -19	15	Partial capture
08-24 03:04	40m	-10 / -4	IU7FQK	0 / 0	5	✓ Full exchange observed
08-24 02:49	40m	- / -	XE1SWW	-6 / -	2	Partial capture
08-24 02:41	40m	-14 / 0	TA3NK	-3 / -	5	✓ Full exchange observed
08-24 02:30	40m	-9 / -	RA6LF	- / 0	3	✓ Closing fragment
08-24 01:15	40m	-9 / -16	N1BDU	-9 / -8	5	✓ Full exchange observed
08-24 01:13	40m	-10 / -18	KN4KL	-10 / -9	5	✓ Full exchange observed
08-24 01:06	40m	-9 / -	KT8Y	-12 / -13	10	✓ Closing observed
08-24 00:19	40m	-6 / -	AJ5CI	- / -20	19	Partial capture
08-24 00:06	40m	-10 / -1	EA1IED	-9 / -3	5	✓ Full exchange observed
08-23 23:59	40m	-9 / -18	VE3JAC	-20 / -17	6	✓ Full exchange observed
08-23 23:14	40m	-8 / -	IT9KWE	- / 0	2	✓ Closing fragment
08-23 23:03	40m	-14 / -	K2LGE	- / -18	2	✓ Closing fragment
08-23 22:50	40m	-13 / -	KE2IIG	- / -18	20	Partial capture
08-23 22:46	40m	-11 / -	SP3SXU	- / -16	2	Partial capture
08-23 22:33	40m	-11 / -17	DC9GT	-8 / -18	8	✓ Full exchange observed
08-23 22:32	40m	-6 / -7	PA5WK	-2 / -5	5	✓ Full exchange observed
08-23 22:07	40m	-9 / +3	SQ2JG	+2 / +2	5	✓ Full exchange observed
08-23 22:03	40m	-8 / -3	EA1ARJ	-6 / -9	5	✓ Full exchange observed
08-23 22:02	40m	-8 / -	SP9KM	- / -6	2	✓ Closing fragment
08-23 21:58	40m	-8 / -9	SQ1EIC	-1 / 0	5	✓ Full exchange observed
08-23 21:47	40m	-10 / -12	PD1SL	-9 / -10	5	✓ Full exchange observed
08-23 21:39	40m	-10 / -	CX6TU	- / -	2	Partial capture
08-23 21:36	40m	-12 / -	CX6TU	- / -	2	Partial capture
08-23 21:32	40m	-10 / -	CX6TU	- / -	2	Partial capture
08-23 21:23	40m	-19 / -6	TA7ARH	0 / +6	5	✓ Full exchange observed
08-23 21:17	40m	-13 / +1	YT1UBN	+7 / -4	5	✓ Full exchange observed
08-23 21:06	40m	-11 / -25	MW7GQB	-14 / -13	7	✓ Full exchange observed
08-23 20:10	40m	-9 / -	RZ9SP	- / -2	5	✓ Closing fragment
08-23 20:07	40m	-8 / -7	EA7HHK	-8 / 0	4	✓ Full exchange observed
08-23 19:58	40m	-12 / +9	R6DZL	-2 / +10	5	✓ Full exchange observed
08-23 19:43	40m	-15 / -	IU8WPZ	- / -11	5	Partial capture
08-23 19:36	40m	- / -13	RU6FK	0 / -	3	✓ Closing fragment
08-23 19:28	40m	-6 / -	IW5BTT	-3 / -12	3	✓ Closing observed
08-23 19:24	40m	-7 / -14	R3TY	-5 / -3	8	✓ Full exchange observed
08-23 19:18	40m	-6 / -24	ON5RJ	-6 / -10	7	✓ Full exchange observed
08-23 19:16	40m	-12 / -13	R3DQK	-13 / -13	3	✓ Full exchange observed
08-23 19:11	40m	-4 / -8	SP9IIG	-11 / -12	4	✓ Closing observed
08-23 19:01	20m	+9 / -	<...>	- / -14	3	Partial capture
08-23 18:45	20m	+6 / -	CN8NS	- / -	20	Partial capture
08-23 18:44	20m	+5 / -11	EA4ITG	-10 / -2	7	✓ Full exchange observed
08-23 18:41	20m	+4 / -	CN8NS	- / -	5	Partial capture
08-23 18:41	20m	- / -	EA4ITG	-8 / -	2	Partial capture
08-23 18:40	20m	- / -25	G8GDS	-6 / -	2	Partial capture
08-23 18:13	20m	- / -22	UR4UUA	-14 / -	4	Partial capture
08-23 17:53	20m	- / -14	EA1PS	-9 / -	3	✓ Closing fragment
08-23 17:46	20m	+5 / -	IZ8IQL	- / +7	2	✓ Closing fragment
08-23 17:39	20m	-2 / -	YO3NSS	- / -17	3	✓ Closing fragment
08-23 17:25	20m	-2 / -	JH1PGF	- / -11	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
035715 -18  230  CQ 4X1UF KM72                         a1 (x11)
044130  +4  515  4X1UF E79KO JN84 (x4)

20m

UTC    dB Audio  Message
185445  +9 2676  CN8NS 4X1UF KM72 (x4)
190145  +8 2676  <...> 4X1UF -14 (x3)
190345 +11 2676  CQ 4X1UF KM72 (x8)

10m

UTC    dB Audio  Message
131730  -7 2022  4X1UF DJ4ZC +06
133330  +2 2802  4X1UF PD1RMB JO32 (x3)
133700  -4 2777  4X1UF DK9BG JO42 (x3)
144300  -7 2801  4X1UF DN9PMH JO61
151630  +0 2802  4X1UF DN9WES JO30 (x4)
093330 -12 2659  4X1UF G8GNI IO91 (x3)

60m

UTC    dB Audio  Message
180230  -5  225  DG4BZ 4X1UF R-18 (x2)
180330  -7  225  CQ 4X1UF KM72
180500  -1  225  SN5J 4X1UF KM72 (x2)
180545 +16  626  4X1UF SN5J -01
180600  -1  225  SN5J 4X1UF R-08
180615 +16  626  4X1UF SN5J RR73
180630  -1  225  SN5J 4X1UF 73
180645 -15  826  4X1UF ON7IO JO20
180700  -6  225  CQ 4X1UF KM72
180730  -8  225  SP9JMR 4X1UF KM72 (x3)
180915  -9  231  4X1UF SP9JMR -04

80m

UTC    dB Audio  Message
035900  -9  284  4X1UF DO1BOC JO44 (x2)
183900 +10 2697  4X1UF YL3ATH KO26 (x3)
223930  -2 2219  4X1UF IZ4CCL JN54
221100  -7 1552  4X1UF LB9ZG JP20 (x2)
210900  -2  215  4X1UF UT3XM -17 (x2)
235700  +0  754  4X1UF SV0TPN KM28

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.