R4FDK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO23

Receiver-side FT8 activity involving R4FDK, decoded by SO8OO in southeastern Poland. 2,653 related FT8 messages, 987 CQ messages, observed on 160m, 80m, 60m, 40m, 20m, 10m, across 42 UTC dates. Heard between 2026-05-23 and 2026-08-21.

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee

Overview

2,653
Related messages
987
CQ messages
42
UTC dates heard
-8 dB
Mean decoder S/N

Bands

80m 20m 40m 60m 10m 160m
First seen: 2026-05-23
Last seen: 2026-08-21 11:14 UTC

Frequent QSO partners observed at SO8OO

Stations R4FDK worked most often, as logged from our receiver:

Activity Heatmap

Locator transmitted by R4FDK

Approximate centre of LO23, decoded 2026-08-21 13:34 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 UTCBandR4FDK S/NCounterpartCounterpart S/NMsgsCapture
08-21 13:33 20m -13 / - R0AIG - / - 2 Partial capture
08-21 13:32 20m -13 / - BH8BMZ - / - 2 Partial capture
08-21 13:11 20m -11 / - <...> - / - 3 Partial capture
08-21 13:07 20m -10 / - BH3AGU - / - 6 Partial capture
08-21 13:03 20m -10 / - BI4BGJ - / - 4 Partial capture
08-21 13:00 20m -10 / - HL2OII - / - 5 Partial capture
08-21 12:55 20m -7 / - KN4RNO - / -6 9 Partial capture
08-21 12:51 20m -10 / - DL2BU - / - 6 Partial capture
08-21 12:48 20m -7 / - BG9KBK - / - 7 Partial capture
08-21 12:43 20m -7 / - OH8MXJ - / -15 8 Partial capture
08-21 12:40 20m -9 / - I4BUQ - / - 7 Partial capture
08-21 12:35 20m -7 / - VE2FVV - / - 2 Partial capture
08-21 12:32 20m -8 / - OZ5ABO - / - 4 Partial capture
08-21 12:28 20m -9 / - YB1KXV - / - 5 Partial capture
08-21 12:26 20m -6 / - <...> - / - 3 Partial capture
08-21 12:23 20m -12 / - VE3TXI - / - 7 Partial capture
08-21 12:14 20m -11 / - DK0PB - / - 6 Partial capture
08-21 12:13 20m -10 / - LU9ET - / - 2 Partial capture
08-21 12:04 20m -10 / - K8DID - / - 5 Partial capture
08-21 12:00 20m -11 / - SM5FWW - / - 4 Partial capture
08-21 11:59 20m -6 / - BA4IFR - / - 2 Partial capture
08-21 11:53 20m -9 / - BA3NZ - / - 2 Partial capture
08-21 11:49 20m -9 / - KB2OBF - / - 6 Partial capture
08-21 11:47 20m -10 / - K2TQC - / - 4 Partial capture
08-21 10:36 20m -23 / - EB1DJ - / - 2 Partial capture
08-21 09:16 20m - / -23 PD0AG -10 / - 2 Partial capture
08-21 06:39 20m - / -8 DK3XX -18 / - 2 ✓ Closing fragment
08-21 05:44 20m - / -18 SV5AZK 0 / - 2 ✓ Closing fragment
08-21 04:12 20m - / - IU0OYV -20 / - 2 Partial capture
08-21 04:09 20m - / +3 R9CA -12 / - 3 ✓ Closing fragment
08-11 16:09 20m - / -1 ON1CC -13 / - 2 ✓ Closing fragment
08-11 15:37 20m - / -13 ON1DGN -18 / - 2 Partial capture
08-11 08:40 20m -24 / - UT1US - / - 2 Partial capture
08-11 08:06 20m - / -14 G4LJH -14 / - 2 Partial capture
08-11 07:46 20m -22 / - PD0GIP - / - 2 Partial capture
08-11 07:40 20m -19 / - R8AEP - / - 3 Partial capture
08-11 07:37 20m -24 / - KF0YOB - / - 2 Partial capture
08-11 07:12 20m - / -1 R3NCG -6 / - 2 ✓ Closing fragment
08-11 06:39 20m - / -5 R50RKZ -2 / - 2 ✓ Closing fragment
08-11 06:34 20m -24 / - RU3NCW - / +7 2 Partial capture
08-11 06:27 20m -20 / - ON5GM - / - 4 Partial capture
08-11 06:25 20m -20 / - UA4FLL - / - 3 Partial capture
08-11 06:23 20m -22 / - UX0KR - / +3 3 Partial capture
08-11 06:20 20m -22 / - F5SZB - / - 2 Partial capture
08-11 06:08 20m -23 / - <...> - / - 2 Partial capture
08-11 05:56 20m -22 / - K5WKH - / - 2 Partial capture
08-11 05:39 20m -20 / - DG1KDD - / - 2 Partial capture
08-11 05:37 20m -19 / - M9VVE - / - 2 Partial capture
08-11 05:34 20m -21 / - VE6CV - / - 2 Partial capture
08-11 05:11 20m -17 / - ON5HE - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
130815 -13 1525  BH3AGU R4FDK LO23 (x4)
131145 -11 1526  <...> R4FDK LO23 (x3)
131430 -18 1950  R4FDK OZ/DL1JGR +04
131715 -17 1525  BD8ELZ R4FDK LO23
131745 -15 1525  UA3IDQ R4FDK LO23
132445 -13 1525  VK2LAW R4FDK LO23
133245 -13 1525  BH8BMZ R4FDK LO23 (x2)
133345 -15 1524  R0AIG R4FDK LO23 (x2)
40m 
UTC    dB Audio  Message
210700 -11 2403  R4FDK R3ZBY RR73
211345  +4  823  R4FDK SP9LCW -02 (x2)
212230 -23 1894  CS8ABF R4FDK LO23
212800 -24 1895  RA1ZZ/3 R4FDK LO23
212930 -21 1895  SP2JLR R4FDK LO23
213100 -23 1895  UT3GP R4FDK LO23 (x2)
171215 -21 1815  R4FDK UA3ECJ +03
161245 -17 1771  R4FDK RT6O RR73
182245 -24 1898  DL2RPN R4FDK LO23
182330  -6 1278  R4FDK DL2RPN -16
182345 -23 1897  DL2RPN R4FDK R+00
182400  -5 1278  R4FDK DL2RPN RR73
182730 -23 1897  UW5KW R4FDK LO23
160m 
UTC    dB Audio  Message
185845 -20 1517  R4FDK EU6KA R-06 (x2)
185915 -16 1937  R4FDK RT2P -09 (x2)
190100 -22 1937  RV3LO R4FDK LO23
182015 -22 1871  CQ R4FDK LO23 (x2)
10m 
UTC    dB Audio  Message
142845  -2 2155  R4FDK CT3KU R-21 (x2)
120815 -20 1717  CQ R4FDK LO23 (x6)
131730  -7 2252  R4FDK YL2GJX KO26 (x3)
122300 -12  746  R4FDK OH3OJ RR73
133130 -19 1122  R4FDK RA6YDX LN04 (x3)
80m 
UTC    dB Audio  Message
000400 -15 1649  CQ R4FDK LO23 (x10)
184030  +0 1748  R4FDK DD0IPA -15
200445 -24 2198  EA7GHD R4FDK LO23
185115  +1 2545  R4FDK RU1AB +10 (x3)
60m 
UTC    dB Audio  Message
002630 -15 1612  R4FDK IU6STP JN63 (x13)

Decoder S/N history by band

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