R4FDD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO33

Receiver-side FT8 activity involving R4FDD, decoded by SO8OO in southeastern Poland. 2,334 related FT8 messages, 124 CQ messages, observed on 160m, 80m, 40m, 20m, 10m, across 47 UTC dates. Heard between 2026-05-20 and 2026-08-18.

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

2,334

Related messages

124

CQ messages

UTC dates heard

-5 dB

Mean decoder S/N

Bands

80m 20m 40m 10m 160m

First seen: 2026-05-20
Last seen: 2026-08-18 12:05 UTC

Frequent QSO partners observed at SO8OO

Stations R4FDD worked most often, as logged from our receiver:

RM5F · European Russia ×6 RC6OD · European Russia ×6 RA3ZGT · European Russia ×5 RX6DA · European Russia ×5 RA9LL · Asiatic Russia ×5 UN8PC · Kazakhstan ×4 R95WTA · Asiatic Russia ×4 R3OZ · European Russia ×4 UI6O · European Russia ×4 UD8S · Asiatic Russia ×4 R6ML · European Russia ×4 RT6Z · European Russia ×4

Activity Heatmap

Locator transmitted by R4FDD

Approximate centre of LO33, decoded 2026-08-16 18:55 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	R4FDD S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-18 14:04	10m	- / -10	OZ0A	+8 / -	3	Partial capture
08-16 18:58	160m	- / +1	RA3DA	+8 / -	2	✓ Closing fragment
08-16 18:50	160m	- / -14	RD6OX	-10 / -	2	✓ Closing fragment
08-16 18:47	160m	- / +1	RA3QM	-7 / -	2	✓ Closing fragment
08-16 18:43	80m	-10 / -5	R7BI	+1 / -	3	✓ Closing observed
08-16 18:29	80m	-4 / -	UA6EU	- / -10	2	✓ Closing fragment
08-16 18:28	80m	-4 / -	UA3QNA	-5 / +7	3	✓ Full exchange observed
08-16 18:24	80m	- / +5	UA3QNA	-6 / -	2	Partial capture
08-16 18:18	80m	- / -4	UB3YGA	0 / -	2	✓ Closing fragment
08-16 18:18	80m	-8 / +9	R3GO	-16 / -1	4	✓ Full exchange observed
08-16 18:13	80m	-11 / +3	R4HLG	-16 / +5	2	Partial capture
08-16 18:10	80m	-8 / -	UB3YGA	- / -5	4	Partial capture
08-16 18:07	80m	-7 / -	RZ6LY	+2 / -	2	✓ Closing observed
08-16 18:04	80m	-10 / -	RA4HPQ	- / -4	2	✓ Closing fragment
08-16 18:02	80m	- / 0	R9FAK	-14 / -	2	✓ Closing fragment
08-16 18:00	80m	+1 / 0	UB6OAK	-10 / -	3	✓ Closing observed
08-16 17:59	80m	-13 / -7	R3BBM	-20 / -	2	✓ Closing observed
08-16 17:59	80m	-7 / -	R6ML	-1 / +1	3	✓ Closing observed
08-16 17:49	80m	-20 / +1	R4HMI	-13 / +4	4	✓ Full exchange observed
08-16 17:48	80m	-21 / +1	RA3SO	-20 / -	3	✓ Closing observed
08-16 17:46	80m	-19 / +1	R3DMS	-11 / -	2	✓ Closing observed
08-16 17:41	80m	-11 / +1	UA3RMB	-8 / +1	4	✓ Full exchange observed
08-16 17:39	80m	-23 / +1	RD6OX	+2 / +3	3	✓ Full exchange observed
08-16 17:38	80m	-18 / -	RC2DD	- / -1	2	Partial capture
08-16 17:35	80m	-22 / +6	R5ACQ	-12 / 0	4	✓ Full exchange observed
08-16 17:34	80m	-18 / -	R9FDM	- / -8	2	✓ Closing fragment
08-16 17:33	80m	- / -2	RA4FHO	-12 / -	2	✓ Closing fragment
08-16 15:14	20m	-6 / -	UA6YEX	- / -16	2	Partial capture
08-16 15:10	20m	+3 / -	UD1I	- / -11	2	✓ Closing fragment
08-16 15:04	20m	-4 / -	R9JT	- / -20	2	✓ Closing fragment
08-16 15:02	20m	-8 / -	UA6YEX	- / -14	2	Partial capture
08-16 14:55	20m	-1 / -	RA0LMV	- / -16	4	✓ Closing fragment
08-16 14:51	20m	-10 / -	UA9UIS	- / -15	2	✓ Closing fragment
08-16 14:48	20m	+7 / -5	R9JE	-6 / 0	4	✓ Full exchange observed
08-16 14:46	20m	-8 / -	RV9CX	- / +3	2	Partial capture
08-16 14:43	20m	-7 / -	UA9LCY	- / -21	3	✓ Closing fragment
08-16 14:40	20m	-2 / -	R0AX	- / -13	2	✓ Closing fragment
08-16 14:28	20m	+4 / -	R9AL	- / -21	2	Partial capture
08-15 07:33	20m	-15 / -	UA1ABJ	- / -19	2	Partial capture
08-15 07:31	20m	-6 / -	RA9UFJ	- / -20	3	✓ Closing fragment
08-15 07:30	20m	+4 / -	UB1AVD	- / -15	2	✓ Closing fragment
08-15 07:01	20m	-7 / -	UA9KBC	- / -18	3	✓ Closing fragment
08-15 06:57	20m	+1 / -	R3NCG	- / -17	3	✓ Closing fragment
08-15 06:54	20m	+1 / -	UA1AOF	- / -14	3	✓ Closing fragment
08-15 06:51	20m	-13 / -	R9HEP	- / -16	2	✓ Closing fragment
08-15 06:50	20m	+3 / -16	UA4COA	+9 / -12	5	Partial capture
08-15 06:47	20m	-8 / -	UA9KBC	- / -15	2	Partial capture
08-15 06:45	20m	0 / -	UA9LLE	- / -18	2	✓ Closing fragment
08-15 06:44	20m	-3 / -	UA1AOF	- / -18	2	Partial capture
08-15 06:42	20m	-12 / -	R6BH	- / +3	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
093345 -15 1425  R4FDD IK6GPZ JN62 (x3)
093830 -24 1682  HA1DAE R4FDD RR73
095200 -20 1497  R4FDD RV6F R+07
100145 -15 1647  R4FDD SV1CQN R-15 (x2)
101045 -17 1800  R4FDD RA6ATZ 73
101415 -18 1380  R4FDD IK7MIY R-08 (x2)
102300 -15 2106  R4FDD EA3AKY R-19 (x2)
140445 +11  626  R4FDD OZ0A -10 (x3)

160m

UTC    dB Audio  Message
194800 -14 1924  R4FDD R1MA 73
195015 -19 1240  SA3CAT R4FDD -18
195200  -5 2450  R4FDD SA3CAT R-05
195215 -19 1240  SA3CAT R4FDD RR73
195230 -10 2450  R4FDD SA3CAT 73
195330 -20 1240  UA4CKN R4FDD -06
184715  -5  996  R4FDD RA3QM R+01 (x2)
184845 -23 1501  RA9YTI R4FDD -19
185045  -9 1579  R4FDD RD6OX R-14 (x2)
185530 -24 1454  CQ R4FDD LO33
185830  +6 2114  R4FDD RA3DA R+01 (x2)
190700 -13  995  R4FDD R2SN 73

80m

UTC    dB Audio  Message
181845  +0  844  R4FDD UB3YGA R-04
181845 -15 2093  R4FDD R3GO 73
181915  +0  844  R4FDD UB3YGA 73
182315  -4  705  RA0SCA R4FDD -14
182400  -5 1649  R4FDD UA3QNA R+05
182415  -9  998  R4FDD UA6EU R-09
182430  -8 1649  R4FDD UA3QNA R+05
182830  -6 2375  UA3QNA R4FDD +07
182845  -5 2374  R4FDD UA3QNA R+16
182900  -2 2375  UA3QNA R4FDD RR73
182930  -5  998  UA6EU R4FDD -10 (x2)
184330  +2 1840  R4FDD R7BI R-05
184345 -10 1839  R7BI R4FDD RR73
184400  +0 1840  R4FDD R7BI 73

20m

UTC    dB Audio  Message
145230 -16 1742  UA9UIS R4FDD RR73
145530  +3 2392  RA0LMV R4FDD -16 (x4)
145945  +0 1367  UA6YEX R4FDD -15 (x3)
150400  -2 1032  R9JT R4FDD -20 (x2)
151015  +4 1035  UD1I R4FDD -11 (x2)
151415  +1 1528  UA6YEX R4FDD -16 (x2)
155800 -11  763  R4FDD UA3WG KO71

40m

UTC    dB Audio  Message
022630  -3  687  DL2UW R4FDD RR73
022700  -5  688  R9OX R4FDD -13 (x2)
022830 -14 2092  RV4CC R4FDD RR73
022845 -19 2092  R4FDD RV4CC 73
023215  -3  535  EA5JYL R4FDD -18
023330  -7  536  OO0O R4FDD RR73
023530 -21 2080  R4FDD LA6VQ 73
023615  -9  302  MW0KJN R4FDD -17
025030 -15 1502  PD2XX R4FDD RR73
025045 -17 1500  R4FDD PD2XX 73
025915 -12  729  R4ML R4FDD RR73
042030 -16 2170  R4FDD <...> R-06
042545  -6 2547  R4FDD OE1TKS R-14 (x2)

Decoder S/N history by band

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