IK5ZPU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IK5ZPU, decoded by SO8OO in southeastern Poland. 510 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 49 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-13.

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 510 FT8 messages attributed to IK5ZPU as the transmitting token by decoded message structure across 49 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (48%), followed by 40 m (47%) and 10 m (5%). Most decodes (61%) 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 (64%); the estimated median was -6.1 dB.

Overview

510
Messages attributed
49
UTC dates decoded
111
Active 15-min windows
-6.1 dB
Estimated median S/N

Bands

40m · 242 20m · 245 10m · 23
First attributed message: 2026-06-07
Last attributed message: 2026-09-13 18:56 UTC

Observed FT8 message patterns

Attributed sample
510 messages
Active dates
49 UTC dates
Estimated median S/N
-6.1 dB
Estimated 10th-90th percentile
-13 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 173, strong (≥ -8 dB) 326.

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 IK5ZPU 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 IK5ZPU

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
JN53 · 290 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,089 km (approx.)
Last such locator decoded
2026-09-13 18:55 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 UTCBandIK5ZPU S/NCounterpartCounterpart S/NMsgsCapture
09-13 18:55 40m +9 / - SV9QWC - / -3 3 ✓ Closing fragment
09-13 17:33 40m +6 / - TK8RI - / - 2 ✓ Closing fragment
09-13 17:06 40m -2 / - RC2Y 0 / -2 3 ✓ Closing observed
09-13 17:05 40m -4 / -9 US3EW -1 / -10 5 ✓ Full exchange observed
09-13 16:58 40m -2 / -19 RZ0SW -22 / -18 9 ✓ Full exchange observed
09-12 19:13 40m +4 / - R2FBW - / - 5 Partial capture
09-12 18:57 40m -3 / -18 EW2ZC -1 / -14 23 ✓ Full exchange observed
09-09 23:00 40m -6 / - WV2B - / -9 2 ✓ Closing fragment
09-09 22:58 40m -4 / - G8KHF - / - 2 Partial capture
09-08 18:25 40m +11 / -14 R7OQ -6 / - 7 Partial capture
09-07 19:02 40m +9 / - 5Q1X - / -17 4 ✓ Closing fragment
09-07 19:00 40m +1 / - E74K - / - 4 Partial capture
09-03 21:15 40m +4 / - RI1FJL - / - 3 Partial capture
09-03 21:13 40m +11 / - SP6U - / -1 4 ✓ Closing fragment
08-23 16:19 40m +1 / - ZL2NU - / -25 11 Partial capture
08-19 20:21 20m -9 / -6 GM4ZTO -8 / +1 3 Partial capture
08-19 20:06 40m -8 / - YU7AS - / - 4 Partial capture
08-16 19:23 40m -9 / -13 EW8AAC -12 / -17 6 ✓ Full exchange observed
08-16 19:20 40m -8 / -8 RL2F -20 / 0 6 ✓ Full exchange observed
08-14 21:00 40m -8 / -10 IK4LZH -7 / +2 16 ✓ Full exchange observed
08-14 20:45 40m -9 / - SA6SKA - / +8 3 ✓ Closing fragment
08-14 20:44 40m -8 / - SQ9SET - / +1 3 ✓ Closing fragment
08-12 07:54 20m -12 / - SV0TOH - / -10 2 Partial capture
08-12 07:41 20m -12 / - TJ1GD - / - 3 Partial capture
08-12 07:35 20m - / - DD7EE -4 / - 3 ✓ Closing fragment
08-12 07:35 20m - / +5 DK5OPA -5 / - 3 ✓ Closing fragment
08-11 08:53 20m -7 / - PD9JPV - / -1 3 ✓ Closing fragment
08-11 08:51 20m -7 / - DJ2MS - / - 4 Partial capture
08-11 04:25 20m +1 / - NL8F - / -20 4 ✓ Closing fragment
08-11 04:23 20m -2 / -10 R6OP +7 / - 4 ✓ Closing observed
08-11 04:17 20m -4 / - T77BL - / - 5 Partial capture
08-09 22:41 20m -10 / - K0FTN - / -19 2 Partial capture
08-05 18:11 20m -13 / - OX3LX - / - 4 Partial capture
08-05 17:58 40m -10 / - IZ8PPI - / +3 3 Partial capture
08-05 17:57 40m -6 / - R6LKG - / -8 2 ✓ Closing fragment
08-05 17:56 40m -8 / -14 RL2F -21 / -15 4 ✓ Full exchange observed
08-03 22:24 40m - / - EB3JT -12 / - 2 Partial capture
08-03 22:22 40m -13 / +7 UA4FKT -2 / - 4 ✓ Closing observed
08-03 22:20 40m -8 / - PY1EME - / -25 3 ✓ Closing fragment
08-02 21:16 40m -3 / - JT1BZ - / -14 15 ✓ Closing fragment
07-31 19:03 20m -10 / - TA3XEE - / -6 5 Partial capture
07-30 18:11 20m -12 / - RL2F - / - 2 Partial capture
07-27 23:47 40m -2 / - 8S2A -9 / +5 4 ✓ Closing observed
07-27 23:43 40m -2 / - VK6ABC - / -25 4 ✓ Closing fragment
07-26 09:01 20m -6 / - VK7NET - / -12 5 ✓ Closing fragment
07-23 23:13 40m -5 / +7 4O7CC -10 / +3 5 ✓ Full exchange observed
07-23 09:56 10m -13 / - R9CA - / - 3 Partial capture
07-23 04:49 40m -10 / - OA4ENG - / - 3 Partial capture
07-22 18:13 20m -12 / - EA5IXH - / 0 5 Partial capture
07-22 18:04 20m -12 / - ZL1UZM - / -24 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
170345 -10  789  RZ0SW IK5ZPU R-20 (x2)
170500  +2  789  IK5ZPU US3EW KN78
170515  -5  789  US3EW IK5ZPU -10
170530  -3  790  IK5ZPU US3EW R-09
170545  -2  789  US3EW IK5ZPU RR73
170600  -2  790  IK5ZPU US3EW 73
170600  +0 1790  IK5ZPU RC2Y KO73
170615  -6  789  RC2Y IK5ZPU -02 (x2)
173300  +8  789  TK8RI IK5ZPU JN53 (x2)
185545  +7  789  SV9QWC IK5ZPU JN53 (x3)
20m 
UTC    dB Audio  Message
073545  -2 1065  IK5ZPU DD7EE 73
073615  -5  564  IK5ZPU DK5OPA R+05
073615  -3 1065  IK5ZPU DD7EE JO41 (x2)
073715  -3  564  IK5ZPU DK5OPA 73
073845 -15  825  IK5ZPU EB3JT 73
074145  -9  824  TJ1GD IK5ZPU JN53 (x3)
074930  -9  824  SV0TOH IK5ZPU JN53 (x3)
202145 -11  601  IK5ZPU GM4ZTO -06
202200  -9  825  GM4ZTO IK5ZPU R+01
202215  -6  600  IK5ZPU GM4ZTO RRR
10m 
UTC    dB Audio  Message
183715  -6  841  9Y4NE IK5ZPU JN53
191945  -7  840  LU2DYH IK5ZPU JN53 (x3)
192215  -5  840  FM4LV IK5ZPU R-06 (x2)
192330  +2  859  IK5ZPU RL3K KO91
192445 -12  840  RL3K IK5ZPU -07 (x2)
092615 -13  843  XV9T IK5ZPU JN53
120645 -13  844  ER5DX IK5ZPU JN53
095600 -14  835  R9CA IK5ZPU JN53 (x3)
205230  -9  838  HJ4KKA IK5ZPU JN53

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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