UR5ZHJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Ukraine Most frequent locator attributed to this token: KN57

Receiver-side FT8 activity involving UR5ZHJ, decoded by SO8OO in southeastern Poland. 1,461 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 82 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-21.

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 1,461 FT8 messages attributed to UR5ZHJ as the transmitting token by decoded message structure across 82 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (60%), followed by 40 m (33%) and 20 m (6%). Most decodes (84%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (84%); the estimated median was -1 dB.

Overview

1,461
Messages attributed
82
UTC dates decoded
288
Active 15-min windows
-1 dB
Estimated median S/N

Bands

80m · 878 40m · 481 20m · 91 10m · 11
First attributed message: 2026-06-07
Last attributed message: 2026-09-21 03:33 UTC

Observed FT8 message patterns

Attributed sample
1,461 messages
Active dates
82 UTC dates
Estimated median S/N
-1 dB
Estimated 10th-90th percentile
-11 to +9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 27, moderate (-15 to -9 dB) 202, strong (≥ -8 dB) 1,232.

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 UR5ZHJ 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 UR5ZHJ

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
KN57 · 195 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
727 km (approx.)
Last such locator decoded
2026-09-19 19:32 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 UTCBandUR5ZHJ S/NCounterpartCounterpart S/NMsgsCapture
09-21 03:32 80m +4 / - N1IWP - / -20 3 Partial capture
09-21 03:31 80m +4 / - DO1ID - / -9 2 Partial capture
09-21 03:30 80m +6 / -4 UT4NY +15 / - 3 ✓ Closing observed
09-20 20:33 80m +4 / -11 G4ZFJ +1 / -15 6 ✓ Full exchange observed
09-20 20:30 80m -4 / - IQ0AAI - / -12 4 ✓ Closing fragment
09-20 18:31 80m -4 / -15 DL0IPA +5 / -11 8 ✓ Full exchange observed
09-20 17:56 80m 0 / - RI1FJZ - / -19 4 Partial capture
09-20 17:41 80m -3 / - RI1FJZ - / -19 9 Partial capture
09-20 17:27 80m +6 / - RI1FJZ - / -20 4 Partial capture
09-20 17:23 80m +8 / - RI1FJZ - / -20 2 Partial capture
09-20 04:21 40m +1 / - W3L - / -22 2 Partial capture
09-19 19:33 80m - / -5 RY3F -12 / - 2 Partial capture
09-19 19:32 80m -4 / -14 DG3EAZ -9 / - 3 ✓ Closing observed
09-19 19:30 80m - / - RA6OY -5 / - 5 Partial capture
09-19 19:26 80m +10 / - SN40KZE - / -15 2 Partial capture
09-19 03:39 40m - / - UA4FKT +6 / - 2 Partial capture
09-18 17:32 80m +5 / - ZL2NU - / -6 10 Partial capture
09-18 17:22 80m +7 / - ZL2NU - / -10 3 Partial capture
09-16 20:22 80m -6 / - RI1FJZ - / -16 2 Partial capture
09-14 03:50 40m 0 / - XE1PM - / -13 6 Partial capture
09-14 02:32 80m 0 / - KB1EFS - / -23 2 Partial capture
09-13 21:27 40m - / -11 G0JJL/P -10 / - 2 ✓ Closing fragment
09-13 21:05 40m - / - JH6DUL -6 / - 2 Partial capture
09-13 20:48 40m - / - G7NUT -11 / - 4 Partial capture
09-13 17:09 80m - / - UA4FKT +14 / - 2 Partial capture
09-13 03:46 80m +5 / - PY8WW - / -20 12 Partial capture
09-13 03:40 80m -3 / - UB3ADO/P - / -14 2 Partial capture
09-13 03:14 80m +7 / - VP2MAA -12 / -18 4 ✓ Closing observed
09-12 04:09 40m -6 / - J38LD - / -13 5 Partial capture
09-12 04:07 40m +4 / - J38DX - / -21 2 Partial capture
09-12 04:00 80m - / -9 TM35DCM -5 / - 3 Partial capture
09-12 03:57 80m -4 / - II7IAME - / -9 2 Partial capture
09-09 18:48 40m +6 / - R1943OD - / -12 2 Partial capture
09-09 18:40 80m +8 / - UR7FM - / -1 2 ✓ Closing fragment
09-09 17:17 80m +6 / -3 UR5TMT 0 / -3 4 ✓ Full exchange observed
09-09 16:37 80m +8 / - JA6VQA - / -24 2 Partial capture
09-09 03:37 80m -7 / - W4IPC - / -14 3 Partial capture
09-08 04:27 40m +4 / - 5N0YEN - / -18 2 Partial capture
09-08 04:20 40m +5 / - 5N0YEN - / -18 7 Partial capture
09-07 19:30 40m +2 / -4 SN31ROT -23 / -13 2 Partial capture
09-07 04:10 40m 0 / - PY1USK - / -18 4 Partial capture
09-07 04:07 40m +3 / - UA3UBV/1 - / -6 3 Partial capture
09-07 03:28 80m -5 / - OA4CLU - / -15 9 Partial capture
09-06 21:13 80m +10 / - 5Z4VJ - / -14 2 Partial capture
09-06 21:11 80m +9 / +4 YO3HUI +8 / -1 6 ✓ Full exchange observed
09-06 21:10 80m +2 / +8 SN8N +24 / +3 4 ✓ Full exchange observed
09-06 05:03 40m +4 / -4 RZ6AKF 0 / +2 3 ✓ Full exchange observed
09-06 05:01 40m +4 / - 5P2F/P -7 / -16 4 ✓ Closing observed
09-06 04:54 80m -1 / - YO2MTG +5 / -2 3 ✓ Closing observed
09-06 04:53 80m -6 / -20 SP9GCZ +10 / -19 4 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
203330  +1 2543  UR5ZHJ G4ZFJ JO01
203345  +4 2015  G4ZFJ UR5ZHJ -15
203400  +5 2543  UR5ZHJ G4ZFJ JO01
203415  +3 2015  G4ZFJ UR5ZHJ -10
203430  +1 2543  UR5ZHJ G4ZFJ R-11 (x2)
033000 +14 1041  UR5ZHJ UT4NY R-04
033015  +6 2095  UT4NY UR5ZHJ RR73
033030 +16 1041  UR5ZHJ UT4NY 73
033100  -2 1542  UR5ZHJ LZ936BA R+22
033145  +1 2095  DO1ID UR5ZHJ -09 (x2)
033245  +5 2095  N1IWP UR5ZHJ -20 (x3)
40m 
UTC    dB Audio  Message
205015 -11 1263  UR5ZHJ G7NUT IO91
210545  -5 2995  UR5ZHJ JH6DUL PM51 (x2)
212700  -6 1891  UR5ZHJ G0JJL/P R-11 (x2)
035030  +1 2183  XE1PM UR5ZHJ -13 (x6)
033930  +6  724  UR5ZHJ UA4FKT LO23 (x2)
042100  -2 2024  W3L UR5ZHJ -22 (x2)
10m 
UTC    dB Audio  Message
131130  -7  368  UR5ZHJ <...> 73 (x5)
102800  -2 1495  UR5ZHJ TM19TFR R+03
084615 -23 1600  UR5ZHJ RW6HP LN14 (x2)
184630 -10  910  UR5ZHJ DF5KX R-07 (x2)
162345  +5  639  UR5ZHJ DJ3HW R-17 (x2)
162545 -20 1878  UR5ZHJ F4HSB R+05
074530  -7 2193  IK0LYL UR5ZHJ KN57 (x2)
20m 
UTC    dB Audio  Message
183900  -7 2581  EN35UKR UR5ZHJ -16 (x2)
185000 -12 2374  BA5AN UR5ZHJ -19 (x3)
141545  +7  706  <...> UR5ZHJ -15 (x4)
141845  +4 2849  9A/DL1SPI UR5ZHJ -18
142015 +10 2849  XU7O UR5ZHJ -13
142215  +7 2788  <...> UR5ZHJ -14 (x2)
142315  +9  464  XU7O UR5ZHJ -15 (x2)

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.

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