IZ4EFV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN64

Receiver-side FT8 activity involving IZ4EFV, decoded by SO8OO in southeastern Poland. 1,358 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 14 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-31.

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 1,358 FT8 messages attributed to IZ4EFV as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 40 m (28%) and 10 m (11%). Most decodes (62%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

1,358

Messages attributed

UTC dates decoded

132

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 4 40m · 382 20m · 828 10m · 144

First attributed message: 2026-06-08
Last attributed message: 2026-08-31 17:13 UTC

Observed FT8 message patterns

Attributed sample: 1,358 messages
Active dates: 14 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 260, moderate (-15 to -9 dB) 476, strong (≥ -8 dB) 622.

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:

SV2HTW · Greece ×4 PD0NGL · Netherlands ×2 PA2WDR · Netherlands ×2 TF4WD · Iceland ×2 KF0YOB · United States ×2 DA1EA · Fed. Rep. of Germany ×2 DF6DBF · Fed. Rep. of Germany ×2 EN100WQ · Ukraine CT2HEX · Portugal TM2WWA · France F4BAL · France ON4VMA · Belgium

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 · 813 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 897 km (approx.)
Last such locator decoded: 2026-08-31 17:12 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
08-31 17:12	40m	-7 / -14	UR7FM	-3 / -2	5	✓ Full exchange observed
08-31 17:09	40m	-8 / -14	YO9HP	+5 / 0	2	Partial capture
08-31 17:05	40m	-10 / -	PE2LRT	- / -19	3	✓ Closing fragment
08-31 17:02	40m	-10 / +1	OE2CAL	+6 / +4	5	✓ Full exchange observed
08-31 16:59	40m	- / -2	OK2VCR	+12 / -	4	Partial capture
08-31 16:57	40m	- / -9	DG9XN	-16 / -	2	✓ Closing fragment
08-31 16:56	40m	- / -11	I8OHQ	0 / -	2	Partial capture
08-31 16:51	40m	- / -	SN1A	0 / -	3	Partial capture
08-31 16:50	40m	-14 / -6	R4DB	-12 / -6	5	✓ Full exchange observed
08-31 16:49	40m	-16 / +9	HG0NPJ	0 / +3	4	✓ Full exchange observed
08-31 16:39	40m	-17 / -19	UN2NC	-13 / -	3	Partial capture
08-31 16:37	40m	-5 / -8	DK9BM	+12 / -1	5	✓ Full exchange observed
08-31 16:35	40m	-15 / +2	I3LTT	-7 / +2	3	Partial capture
08-31 16:30	40m	-14 / -	M0ABG	-21 / -	2	✓ Closing observed
08-31 16:26	40m	-14 / -	DL3HQL	-10 / -9	4	✓ Closing observed
08-31 16:24	40m	-14 / -	RA9CUU	- / -	2	Partial capture
08-31 16:23	40m	- / -	SP9MRP	+8 / -	2	Partial capture
08-31 16:19	40m	-14 / -	IU2SLI	-6 / -	3	✓ Closing observed
08-31 04:13	20m	- / -12	UA3VVA	-14 / -	2	✓ Closing fragment
08-31 03:59	20m	- / -13	RJ2T	-4 / -	2	✓ Closing fragment
08-31 01:29	20m	- / -13	9K2RT	-18 / -	2	Partial capture
08-30 23:49	20m	- / -17	PY8WW	-13 / -	2	✓ Closing fragment
08-30 23:40	20m	-14 / -	EA1CUI	- / -6	3	✓ Closing fragment
08-30 23:31	20m	-11 / -	BI1LWV	- / -13	3	✓ Closing fragment
08-30 23:27	20m	-10 / -	HI3RMJ	- / -3	3	✓ Closing fragment
08-30 23:17	20m	-11 / -	EA8BYO	- / -15	3	✓ Closing fragment
08-30 23:09	20m	-8 / -	EA2DYB	- / +4	3	✓ Closing fragment
08-26 04:46	40m	-11 / -	KF0GE	- / -	2	Partial capture
08-26 04:45	40m	- / +10	E75FM	-2 / -	2	✓ Closing fragment
08-26 04:42	40m	- / -10	M0IOY	-4 / -	2	✓ Closing fragment
08-26 04:39	40m	-12 / -16	UT5MB	0 / -9	3	Partial capture
08-26 00:11	40m	-3 / -	OD5ZZ	-8 / -11	4	✓ Closing observed
08-26 00:00	40m	-8 / -	M0NXD	- / -22	3	✓ Closing fragment
08-25 23:55	40m	-7 / -12	R0AX	-6 / -5	5	✓ Full exchange observed
08-25 23:53	40m	-9 / -	SV7SXE	+3 / 0	5	✓ Full exchange observed
08-25 23:51	40m	-10 / -	W1XI	- / -9	2	✓ Closing fragment
08-25 23:47	40m	-3 / -2	G8GRG	-19 / -2	4	Partial capture
08-25 23:44	40m	-9 / -	K1BIF	- / -13	6	✓ Closing fragment
08-25 23:39	40m	-10 / +7	M1AQR	-19 / -1	5	✓ Full exchange observed
08-25 23:34	40m	-8 / +5	M1AQR	-14 / 0	3	Partial capture
08-25 23:32	40m	-7 / -	F1ONW	- / -12	3	✓ Closing fragment
08-25 23:31	40m	-3 / -1	PD2RAL	-9 / -	9	Partial capture
08-25 23:26	40m	-3 / -9	TF4WD	-9 / +1	5	✓ Full exchange observed
08-25 23:24	40m	-2 / -	HZ1TT	- / -	2	Partial capture
08-25 23:23	40m	-9 / -14	RK6MC	-4 / -	2	Partial capture
08-25 23:21	40m	-6 / +3	M1AQR	-20 / -	3	Partial capture
08-25 23:16	40m	-6 / -3	GM4HYG	-8 / -1	4	✓ Full exchange observed
08-25 23:13	40m	-10 / -12	CS8ABF	-11 / -8	4	✓ Full exchange observed
08-25 23:10	40m	-3 / -1	MM0KQC	-11 / -6	5	✓ Full exchange observed
08-25 23:05	40m	-7 / -17	RX6AOB	-2 / -3	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
170245  +8  734  IZ4EFV OE2CAL +01
170300 -10 1662  OE2CAL IZ4EFV R+04
170315  +4  734  IZ4EFV OE2CAL RR73
170330 -10 1662  OE2CAL IZ4EFV 73
170500  -9 1662  PE2LRT IZ4EFV JN64 (x3)
170900  +5 2188  IZ4EFV YO9HP -14
170915  -8 1662  YO9HP IZ4EFV R+00
171115 -11 1662  OK3WOD IZ4EFV JN64
171200  -8 1662  UR7FM IZ4EFV JN64
171215  -6 2385  IZ4EFV UR7FM -14
171230  -6 1662  UR7FM IZ4EFV R-02
171245  +0 2385  IZ4EFV UR7FM RR73
171300  -8 1662  UR7FM IZ4EFV 73

20m

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)

80m

UTC    dB Audio  Message
192530  -5  639  IZ4EFV DG0LHH +00 (x2)
181400 -24 1978  CQ IZ4EFV JN64                        a1 (x2)
181500 -21 1978  OK1VKX IZ4EFV -02
181515 +10 1978  IZ4EFV OK1VKX R-06
181530 -16 1978  OK1VKX IZ4EFV RR73
181545  +5 1978  IZ4EFV OK1VKX 73

10m

UTC    dB Audio  Message
221115  -7 2220  ZA5G IZ4EFV JN64
184400 -23 1876  IZ4EFV PA3BMB 73
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 -19 1706  IZ4EFV 9A6ZZ -17
144115 -12  946  F4GAJ IZ4EFV JN64
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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee