IZ4EFV — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving IZ4EFV, decoded by SO8OO in southeastern Poland. 2,229 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 26 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-11-04.
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 2,229 FT8 messages attributed to IZ4EFV as the transmitting token by decoded message structure across 26 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (47%), followed by 20 m (37%) and 80 m (9%). Most decodes (57%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.
Overview
Bands
Last attributed message: 2026-11-04 18:36 UTC
Observed FT8 message patterns
- Attributed sample
- 2,229 messages
- Active dates
- 26 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -19.1 to -2.3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 528, moderate (-15 to -9 dB) 786, strong (≥ -8 dB) 915.
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 IZ4EFV 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 IZ4EFV
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
- JN64 · 1,385 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 897 km (approx.)
- Last such locator decoded
- 2026-11-04 18:36 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 UTC | Band | IZ4EFV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-04 18:34 | 80m | -19 / -11 | DA1MD | -14 / - | 2 | ✓ Closing observed |
| 11-04 18:28 | 80m | -16 / -17 | GM0KMJ | -14 / -13 | 5 | ✓ Full exchange observed |
| 11-04 18:27 | 80m | -9 / - | RU4CK/P | - / -2 | 2 | Partial capture |
| 11-04 18:22 | 80m | -11 / - | R3RB | - / -22 | 4 | ✓ Closing fragment |
| 11-04 18:20 | 80m | -13 / -24 | R9GM | +2 / -5 | 5 | ✓ Full exchange observed |
| 11-04 18:18 | 80m | -12 / - | YO5QDI | - / -13 | 3 | ✓ Closing fragment |
| 11-04 18:16 | 80m | -13 / 0 | DD8BA | -1 / - | 3 | ✓ Closing observed |
| 11-04 18:13 | 80m | -13 / -12 | DG0OFT | -7 / - | 3 | ✓ Closing observed |
| 11-04 18:08 | 80m | - / -1 | IU3ISK | -4 / - | 2 | ✓ Closing fragment |
| 11-04 18:04 | 80m | -13 / -12 | OZ1A | -3 / -15 | 5 | ✓ Full exchange observed |
| 11-04 17:58 | 80m | -18 / - | F4MXT/P | - / -4 | 2 | Partial capture |
| 11-04 17:56 | 80m | -18 / - | DJ8TX | - / -18 | 2 | Partial capture |
| 11-04 17:55 | 80m | -14 / -1 | IU3ISK | +8 / - | 3 | Partial capture |
| 11-04 17:47 | 80m | -12 / - | 9A60CBM | - / +4 | 2 | Partial capture |
| 11-04 17:43 | 80m | -12 / - | 6W/IK2HKT | - / -2 | 2 | Partial capture |
| 11-04 17:37 | 80m | -11 / -13 | F4MUM | 0 / -7 | 4 | Partial capture |
| 11-04 17:34 | 80m | -19 / -5 | I1WUA | -21 / -6 | 3 | ✓ Full exchange observed |
| 11-04 17:28 | 80m | -14 / -18 | DG9WH | -8 / - | 4 | ✓ Closing observed |
| 11-01 06:07 | 40m | - / - | LZ1ZF | +4 / - | 2 | Partial capture |
| 11-01 06:03 | 40m | -8 / - | J88IH | - / - | 10 | Partial capture |
| 11-01 05:49 | 40m | -18 / - | J88IH | - / - | 3 | Partial capture |
| 11-01 05:16 | 40m | - / -10 | RJ3DC | -7 / - | 3 | Partial capture |
| 11-01 05:10 | 40m | - / -13 | TC8ATA | -21 / - | 3 | Partial capture |
| 11-01 03:26 | 40m | - / -13 | UA9MA | +1 / - | 2 | ✓ Closing fragment |
| 10-31 21:30 | 40m | -22 / - | TA2BKU | - / - | 2 | ✓ Closing fragment |
| 10-31 20:53 | 40m | - / -11 | CT2JCB | -13 / - | 2 | ✓ Closing fragment |
| 10-31 20:31 | 40m | - / -14 | EA5JLB | -12 / - | 2 | ✓ Closing fragment |
| 10-31 20:26 | 40m | - / -3 | EG5TES | -6 / - | 2 | ✓ Closing fragment |
| 10-30 05:19 | 40m | -6 / - | EA4EQ | - / 0 | 2 | Partial capture |
| 10-30 05:16 | 40m | -7 / - | G6WCX | - / -6 | 3 | ✓ Closing fragment |
| 10-30 05:10 | 40m | -14 / - | RA3SO | - / -12 | 3 | ✓ Closing fragment |
| 10-30 05:09 | 40m | - / - | UT5MB | -8 / - | 2 | Partial capture |
| 10-30 05:08 | 40m | - / -4 | YO6BHN | +10 / - | 2 | ✓ Closing fragment |
| 10-30 04:25 | 40m | - / -12 | RC5F | -6 / - | 2 | ✓ Closing fragment |
| 10-30 04:20 | 40m | -6 / - | N0BUZ | - / - | 2 | ✓ Closing fragment |
| 10-30 04:16 | 40m | -9 / - | EA1CUI | - / 0 | 3 | ✓ Closing fragment |
| 10-30 03:48 | 40m | -10 / -5 | M0OXO | +1 / +2 | 5 | ✓ Full exchange observed |
| 10-30 03:42 | 40m | -11 / - | WB2AA | - / -24 | 3 | ✓ Closing fragment |
| 10-30 03:36 | 40m | -8 / - | UD8S | - / -17 | 3 | ✓ Closing fragment |
| 10-30 03:33 | 40m | -13 / - | KE2FP | - / -9 | 3 | ✓ Closing fragment |
| 10-30 03:25 | 40m | -8 / -15 | RX6ABW | -8 / -20 | 4 | ✓ Full exchange observed |
| 10-30 03:20 | 40m | -6 / -8 | 5B4AMX | 0 / -8 | 5 | ✓ Full exchange observed |
| 10-30 03:17 | 40m | -9 / - | EW2GI | - / -15 | 4 | ✓ Closing fragment |
| 10-30 03:04 | 40m | -18 / - | SM6ONT | - / -10 | 2 | ✓ Closing fragment |
| 10-30 03:00 | 40m | -16 / +5 | RA7A | 0 / 0 | 5 | ✓ Full exchange observed |
| 10-30 02:47 | 40m | -16 / -16 | UA6BGM | +5 / - | 4 | ✓ Closing observed |
| 10-30 02:37 | 40m | -13 / - | R2FDP | - / - | 2 | ✓ Closing fragment |
| 10-30 02:32 | 40m | -11 / - | IK3/UY7LA | - / -7 | 2 | Partial capture |
| 10-30 02:16 | 40m | -16 / - | K8BL | - / -23 | 5 | Partial capture |
| 10-30 02:11 | 40m | -14 / - | NP4VA | - / -20 | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 182200 -11 1859 R3RB IZ4EFV JN64 (x4) 182700 -6 1859 RU4CK/P IZ4EFV JN64 182715 +3 2514 IZ4EFV RA6FCU/P -05 182730 -12 1859 RU4CK/P IZ4EFV R-02 182830 -10 1859 GM0KMJ IZ4EFV JN64 182845 -13 994 IZ4EFV GM0KMJ -17 182900 -18 1859 GM0KMJ IZ4EFV R-13 182915 -14 994 IZ4EFV GM0KMJ RRR 182930 -21 1859 GM0KMJ IZ4EFV 73 183415 -14 755 IZ4EFV DA1MD -11 183500 -19 1859 DA1MD IZ4EFV 73 183615 -16 1859 RN3QTA IZ4EFV JN64
UTC dB Audio Message 055045 -19 1176 J88IH IZ4EFV JN64 (x10) 060730 +2 1028 IZ4EFV LZ1ZF KN22 060745 -10 1176 J88IH IZ4EFV JN64 060800 +7 1028 IZ4EFV LZ1ZF KN22 060815 -9 1176 J88IH IZ4EFV JN64 (x2)
UTC dB Audio Message 233345 -10 2112 M9LCB IZ4EFV JN64 233530 -12 2112 BG7BVI IZ4EFV JN64 233730 -14 2112 IT9CMZ IZ4EFV JN64 233900 -16 2112 EA4GHH IZ4EFV JN64 234030 -13 2113 EA1CUI IZ4EFV JN64 (x3) 234930 -14 1430 IZ4EFV PY8WW -17 (x2) 012915 -15 1673 IZ4EFV 9K2RT -13 (x2) 035900 -5 2081 IZ4EFV RJ2T -13 (x2) 041315 -14 1132 IZ4EFV UA3VVA -12 (x2)
UTC dB Audio Message 141730 -13 947 OE4DJN IZ4EFV JN64 142015 -10 945 IZ4EFV F6HUK +03 (x2) 143000 -11 946 OZ1PDE IZ4EFV 73 143030 -13 946 F3CJ IZ4EFV -03 143330 -17 946 DL6PX IZ4EFV JN64 143345 +11 947 IZ4EFV DL6PX -15 (x2) 143530 -15 947 DO9BAU IZ4EFV RR73 144030 -12 946 9A6ZZ IZ4EFV JN64 144115 -12 946 F4GAJ IZ4EFV JN64 144115 -19 1706 IZ4EFV 9A6ZZ -17 150730 -13 946 IZ4EFV DH5BM JO41
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.
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