4X5XM — 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: Israel Most frequent locator attributed to this token: KM72

Receiver-side FT8 activity involving 4X5XM, decoded by SO8OO in southeastern Poland. 68 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-18.

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 68 FT8 messages attributed to 4X5XM as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (78%), followed by 10 m (22%). Most decodes (88%) fell within the six-hour window 04:00-10:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (68%); the estimated median was -11 dB.

Overview

68
Messages attributed
9
UTC dates decoded
18
Active 15-min windows
-11 dB
Estimated median S/N

Bands

20m · 53 10m · 15
First attributed message: 2026-06-08
Last attributed message: 2026-10-18 09:51 UTC

Observed FT8 message patterns

Attributed sample
68 messages
Active dates
9 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-14 to -4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 46, strong (≥ -8 dB) 16.

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 4X5XM in decoded directed-looking exchanges:

Most frequent locator attributed to 4X5XM

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
KM72 · 46 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,224 km (approx.)
Last such locator decoded
2026-10-18 09:51 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 UTCBand4X5XM S/NCounterpartCounterpart S/NMsgsCapture
11-05 04:58 40m - / -14 YO9IAB 0 / - 4 ✓ Closing fragment
11-03 05:19 40m - / -24 SV5BYP -8 / - 2 Partial capture
11-02 18:02 40m - / -14 OT8P -2 / - 5 ✓ Closing fragment
11-02 17:34 40m - / - MI7XHT -13 / - 2 Partial capture
10-30 04:13 40m - / -24 TC8ATA -5 / - 4 ✓ Closing fragment
10-29 16:52 40m - / +2 UR6EA +1 / - 3 Partial capture
10-29 16:10 40m - / -16 UR6EA +6 / - 2 Partial capture
10-28 16:53 40m - / -17 DH1NGL -7 / - 5 Partial capture
10-28 16:41 40m - / -19 YO2LGK -8 / - 4 Partial capture
10-24 17:41 40m - / - SV1BLD +16 / - 2 Partial capture
10-24 17:04 40m - / -21 E75BK -6 / - 12 Partial capture
10-17 10:52 10m - / -10 F1PBZ -10 / - 2 Partial capture
10-17 04:48 40m - / -12 Z34K +5 / - 2 ✓ Closing fragment
10-13 18:19 40m - / -19 IZ3EAW +11 / - 4 ✓ Closing fragment
10-13 17:57 40m - / -17 SV1MOZ -12 / - 2 ✓ Closing fragment
10-09 04:25 40m - / - SV5AZK -18 / - 2 ✓ Closing fragment
08-16 05:41 20m - / -19 UA3GDJ -14 / - 3 ✓ Closing fragment
08-16 05:38 20m - / - DL1UDO -12 / - 2 Partial capture
08-16 05:37 20m - / - UA3GDJ -6 / - 3 Partial capture
08-08 05:39 20m - / -10 HB9EFK -14 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
174415  -3 2518  4X5XM SV1AVT KM17
180245  -1  531  4X5XM OT8P JO21 (x5)
051945  -7 1388  4X5XM SV5BYP -24 (x2)
173030  -3 2887  4X5XM F4BYA JN19
045815  -8 2020  4X5XM IZ8VYU JN71
045845  +1  800  4X5XM YO9IAB KN25 (x4)
052615  +1 2020  4X5XM IZ8VYU JN71
10m 
UTC    dB Audio  Message
144845 -11  562  9A1Z 4X5XM KM72
145615 -11  562  OM3CPV 4X5XM KM72
105230  -9 2734  4X5XM F1PBZ -10 (x2)
133730 -22 1491  4X5XM DN9JGL -13
093215 -11  560  PD0LBY 4X5XM -19
094745 -12  559  IU4RYO 4X5XM RR73
094845 -12  559  CQ 4X5XM KM72                         a1 (x3)
115430  -9 2275  4X5XM DF4WQ JN39
124800 -23 1787  4X5XM DO9PV JO30
20m 
UTC    dB Audio  Message
053945 -21 1072  4X5XM HB9EFK -10 (x3)
070345  -8 1568  4X5XM IU1LEB -17
053745  -7  558  4X5XM UA3GDJ KO92 (x2)
053815 -12 1263  4X5XM DL1UDO JO31
053845  -7  557  4X5XM UA3GDJ KO92
053845 -13 1263  4X5XM DL1UDO JO31
054145 -18 1918  4X5XM UA3GDJ R-19 (x3)
075900 -18 1458  4X5XM SV5AZK -19
134600 -11  753  4X5XM HB9IUI JN36

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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