4Z1DZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Israel Most frequent locator attributed to this token: KM72

Receiver-side FT8 activity involving 4Z1DZ, decoded by SO8OO in southeastern Poland. 61 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-08-08.

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 61 FT8 messages attributed to 4Z1DZ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (90%), followed by 40 m (10%). Most decodes (87%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

40m · 6 20m · 55

First attributed message: 2026-06-27
Last attributed message: 2026-08-08 18:07 UTC

Observed FT8 message patterns

Attributed sample: 61 messages
Active dates: 5 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -16 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 31.

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 4Z1DZ in decoded directed-looking exchanges:

EA8UP · Canary Islands F4NMY · France 9J2FI · Zambia BG4OOO · China CN2DX · Morocco DK8HC · Fed. Rep. of Germany DM5WGL · Fed. Rep. of Germany G8OO · England HA5LB · Hungary IK4UPG · Italy IU2RGL · Italy N0STL · United States

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 4Z1DZ

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 · 23 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,224 km (approx.)
Last such locator decoded: 2026-08-08 18:01 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	4Z1DZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-11 17:17	10m	- / -4	F4NMY	-12 / -	3	✓ Closing fragment
08-11 17:11	10m	- / -15	EA8UP	-16 / -	2	✓ Closing fragment
08-08 18:05	20m	-5 / -	SP3BZU	- / -1	3	Partial capture
08-08 18:04	20m	-5 / -	PD1ADA	- / -15	2	✓ Closing fragment
08-08 18:03	20m	-4 / -7	G8OO	-22 / -	2	✓ Closing observed
08-08 18:02	20m	-4 / -	N0STL	- / -13	3	✓ Closing fragment
08-08 18:01	20m	-6 / -	VO1IV	- / -	2	Partial capture
08-08 18:00	20m	-2 / -	HA5LB	- / -7	2	✓ Closing fragment
08-08 17:57	20m	-4 / -	VO1IV	- / -	4	Partial capture
08-08 17:53	20m	-6 / -	WV2B	- / -	4	Partial capture
08-01 19:58	20m	-10 / -9	R6LPF	-4 / -15	4	✓ Full exchange observed
08-01 19:56	20m	-10 / -5	IK4UPG	-17 / -	5	✓ Closing observed
08-01 19:55	20m	- / -	R6LPF	-7 / -	2	Partial capture
08-01 19:53	20m	-10 / -	TF4WD	- / -17	4	✓ Closing fragment
08-01 19:46	20m	-10 / -	RW0IM	- / -11	2	✓ Closing fragment
08-01 19:45	20m	-7 / -	IU2RGL	- / -11	2	✓ Closing fragment
08-01 19:43	20m	-9 / -	TF4M	+1 / -1	5	✓ Full exchange observed
08-01 15:02	20m	-7 / -6	DM5WGL	-2 / -	3	✓ Closing observed
08-01 15:00	20m	0 / -	F4HSB	-24 / -15	2	Partial capture
08-01 14:58	20m	-4 / -	TF/N7JMV	- / -13	2	Partial capture
08-01 14:56	20m	-15 / -	7X2KF	- / -	3	Partial capture
08-01 14:39	20m	-17 / -	<...>	- / -14	3	Partial capture
07-28 19:01	20m	-8 / -	9J2FI	- / -16	3	✓ Closing fragment
07-28 18:59	20m	-12 / 0	CN2DX	-2 / -	4	✓ Closing observed
06-27 20:50	40m	- / -13	UX7QG	-8 / -	2	Partial capture
06-27 20:47	40m	-16 / -14	R2EA/P	-17 / -	3	✓ Closing observed
06-27 20:45	40m	-14 / -5	SP9D	+6 / -11	6	✓ Full exchange observed
06-27 20:44	40m	-14 / -	F1HUM	- / -13	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
171100 -14 1212  4Z1DZ EA8UP -15 (x2)
171430  -5  830  4Z1DZ F4NMY JN08 (x4)
171900 -15 2394  4Z1DZ DN9OPA JN38

20m

UTC    dB Audio  Message
180045 -20 2033  4Z1DZ PD1ADA JO21
180100  -5  895  VO1IV 4Z1DZ KM72 (x2)
180200  -4  896  N0STL 4Z1DZ -13 (x3)
180345 -22 1432  4Z1DZ G8OO R-07
180400  -4  896  G8OO 4Z1DZ RR73
180430  -4  896  PD1ADA 4Z1DZ -15 (x2)
180530  -6  896  SP3BZU 4Z1DZ -01 (x3)
180700  -2  897  R4FDW 4Z1DZ R-15
181200  -9 1945  4Z1DZ M7KPE JO02

40m

UTC    dB Audio  Message
204445 -15 1222  F1HUM 4Z1DZ -13 (x2)
204530  +4 2720  4Z1DZ SP9D JO90 (x2)
204615 -15 1222  SP9D 4Z1DZ -11
204630 +10 2721  4Z1DZ SP9D R-05
204645 -14 1222  SP9D 4Z1DZ RR73
204700  +6 2720  4Z1DZ SP9D 73
204700 -18 1791  4Z1DZ R2EA/P -14 (x2)
204745 -16 1219  R2EA/P 4Z1DZ 73
205000  -6 1220  4Z1DZ UX7QG KO50 (x2)
205345 -18 1220  DU1RAA 4Z1DZ KM72

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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