DK4REX — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO31

Receiver-side FT8 activity involving DK4REX, decoded by SO8OO in southeastern Poland. 162 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-13 and 2026-11-01.

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 162 FT8 messages attributed to DK4REX as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (54%), followed by 40 m (40%) and 10 m (5%). Most decodes (96%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (73%); the estimated median was -4 dB.

Overview

162
Messages attributed
6
UTC dates decoded
28
Active 15-min windows
-4 dB
Estimated median S/N

Bands

80m · 88 40m · 65 20m · 1 10m · 8
First attributed message: 2026-08-13
Last attributed message: 2026-11-01 17:59 UTC

Observed FT8 message patterns

Attributed sample
162 messages
Active dates
6 UTC dates
Estimated median S/N
-4 dB
Estimated 10th-90th percentile
-14 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 118.

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 DK4REX in decoded directed-looking exchanges:

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 DK4REX

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
JO31 · 72 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,054 km (approx.)
Last such locator decoded
2026-11-01 17:54 UTC

Other locator fields attributed to this token: JO54 (1).

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 UTCBandDK4REX S/NCounterpartCounterpart S/NMsgsCapture
11-01 18:03 40m - / -16 9A1CCB -7 / - 2 ✓ Closing fragment
11-01 17:57 40m -5 / - DH9ET - / -12 2 Partial capture
11-01 17:52 40m -12 / - DD3ZZ - / - 3 Partial capture
11-01 17:51 40m -6 / - UX7QV - / -10 3 Partial capture
11-01 17:45 40m -6 / - DG6RAH - / -24 2 Partial capture
11-01 17:44 40m -8 / - 5Q1X - / -17 2 ✓ Closing fragment
11-01 17:41 40m -5 / +3 IK1NPP -10 / -9 5 ✓ Full exchange observed
11-01 17:37 40m -6 / - DD1OO 0 / +7 9 Partial capture
11-01 17:35 40m -5 / +3 TA1MB -10 / -8 4 ✓ Full exchange observed
11-01 17:34 40m -4 / +10 IZ5OVP -2 / -5 4 ✓ Full exchange observed
11-01 17:30 40m -4 / - RJ3DC -22 / -13 3 ✓ Closing observed
11-01 16:39 40m -17 / -21 ES2AJ -2 / - 4 ✓ Full exchange observed
11-01 16:11 40m - / - DL7UST -7 / - 2 Partial capture
11-01 15:57 40m - / -10 ON1DGN -10 / - 2 Partial capture
11-01 15:56 40m - / -16 DA1ST +5 / - 13 Partial capture
11-01 15:39 40m - / -10 DL3EBJ -9 / - 2 Partial capture
11-01 15:29 40m - / - DH2NJS -6 / - 10 Partial capture
11-01 15:19 40m -22 / - M7FSE - / - 2 Partial capture
11-01 15:12 40m - / -22 LY3PW +10 / - 3 Partial capture
10-06 13:40 40m - / - F/DK5UR/P -22 / - 2 ✓ Closing fragment
10-06 13:39 40m - / -19 DH3YAK -12 / - 3 ✓ Closing fragment
10-06 13:36 40m -11 / -4 IU4WSH -4 / - 3 ✓ Closing observed
10-05 13:10 40m - / -4 DL7UKM -6 / - 3 ✓ Closing fragment
10-05 12:59 40m - / - OH1TEV -9 / - 3 Partial capture
10-05 12:50 40m - / -19 OE8PIT -6 / - 5 Partial capture
09-26 14:52 40m - / - HA9OA 0 / - 2 Partial capture
09-26 14:36 40m - / +2 G6DXY -21 / - 2 ✓ Closing fragment
09-26 14:36 40m - / +4 IK4CBO -15 / - 4 ✓ Closing fragment
09-26 14:26 40m - / - DL9KM -8 / - 6 Partial capture
09-26 14:25 40m - / - DL1DCT -23 / - 2 Partial capture
09-26 14:15 40m - / -8 SP9MRP +3 / - 3 ✓ Closing fragment
09-26 14:13 40m - / -6 SQ3RAX +6 / - 3 ✓ Closing fragment
09-26 13:58 40m -17 / -15 S57CT -3 / - 5 ✓ Full exchange observed
09-26 13:53 40m - / -4 DL5ZG -13 / - 2 ✓ Closing fragment
09-26 13:48 40m - / -21 DK1IO -8 / - 4 Partial capture
09-26 13:43 40m - / -9 DL8RO -9 / - 3 ✓ Closing fragment
09-26 13:25 40m - / -4 DK5UR -13 / - 3 ✓ Closing fragment
09-26 13:25 40m - / -8 DL8RO -8 / - 2 Partial capture
09-11 16:45 40m -10 / - US2YW -10 / +5 3 Partial capture
09-11 16:34 40m - / +2 DL6MRS +10 / - 2 ✓ Closing fragment
09-11 16:24 40m -24 / -30 SA7CHI -4 / - 4 Partial capture
09-11 16:22 40m - / -11 G4YAN -3 / - 3 ✓ Closing fragment
09-11 16:01 40m - / +7 DG6ITP +4 / - 4 ✓ Closing fragment
09-11 15:53 40m -12 / - R5BM/M - / -17 3 Partial capture
09-11 15:50 40m - / -13 DM3RCK -2 / - 2 Partial capture
09-11 15:44 40m - / -21 PD1B -4 / - 6 Partial capture
09-11 15:38 40m - / +7 DD7EE +2 / - 2 ✓ Closing fragment
09-11 15:35 40m -16 / -5 DL5DQZ +10 / - 6 ✓ Closing observed
09-11 15:33 40m - / -9 DD6AJ +1 / - 2 ✓ Closing fragment
09-11 15:22 40m -14 / - DJ0MAB -5 / -11 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
174730  -8 2881  CQ DK4REX JO31                        a1 (x4)
175000  -6 2881  A93MO DK4REX JO31
175100  -6 2881  UX7QV DK4REX -10 (x3)
175230  -4 2881  DD3ZZ DK4REX JO31 (x3)
175745  -3 2868  DH9ET DK4REX R-12 (x2)
180330  -7 2237  DK4REX 9A1CCB R-16 (x2)
20m 
UTC    dB Audio  Message
164330  -7 2821  EB1DJ DK4REX JO31
10m 
UTC    dB Audio  Message
152930 -13 1514  DK4REX GJ0KYZ +00 (x2)
154500 -15 2247  DK4REX F5SZY IN96 (x2)
151330  -9 2596  CQ DK4REX JO31 (x4)
151530 -11 2597  IQ4JO DK4REX -06 (x2)
151800 -11 2597  CQ DK4REX JO31 (x2)
80m 
UTC    dB Audio  Message
202400 -12 1357  DJ2KP DK4REX JO31 (x2)
202645  +3 1310  SM7XON DK4REX JO31
202700  -2 2077  DK4REX SM7XON +00
202715  +3 1310  SM7XON DK4REX R+10
202730  +3 2077  DK4REX SM7XON RR73
202745  +4 1310  SM7XON DK4REX 73
202815  -4 1310  D2UY DK4REX JO31 (x4)
203030  +7 1310  DH1DK DK4REX JO31 (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.

CW

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

Explore CW reception at SO8OO

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