DM4ZUL — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO71

Receiver-side FT8 activity involving DM4ZUL, decoded by SO8OO in southeastern Poland. 316 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 37 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-10-22.

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 316 FT8 messages attributed to DM4ZUL as the transmitting token by decoded message structure across 37 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (39%), followed by 40 m (29%) and 160 m (26%). Most decodes (88%) fell within the six-hour window 13:00-19:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (86%); the estimated median was +6 dB.

Overview

316

Messages attributed

UTC dates decoded

Active 15-min windows

+6 dB

Estimated median S/N

Bands

160m · 83 80m · 122 40m · 92 20m · 6 10m · 13

First attributed message: 2026-06-14
Last attributed message: 2026-10-22 16:09 UTC

Observed FT8 message patterns

Attributed sample: 316 messages
Active dates: 37 UTC dates
Estimated median S/N: +6 dB
Estimated 10th-90th percentile: -10 to +17 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 271.

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 DM4ZUL in decoded directed-looking exchanges:

IW4AOT · Italy ×2 DA0M · Fed. Rep. of Germany ×2 DL0MFK/LH · Fed. Rep. of Germany ×2 DA6NEL · Fed. Rep. of Germany ×2 DO9BAU · Fed. Rep. of Germany LU6YR · Argentina PY2FUI · Brazil RA9AAA · Asiatic Russia RA9ACA · Asiatic Russia UX7QV · Ukraine DF4JH · Fed. Rep. of Germany DK7ZT · Fed. Rep. of Germany

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 DM4ZUL

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: JO71 · 20 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 508 km (approx.)
Last such locator decoded: 2026-10-02 16:11 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	DM4ZUL S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 16:09	160m	-16 / -9	LY3BRA	-2 / -	3	✓ Closing observed
10-22 16:08	160m	-15 / +3	OK1FRG	+8 / -	4	✓ Full exchange observed
10-21 17:01	160m	-13 / -	SM2OTU	- / -13	3	✓ Closing fragment
10-21 17:00	160m	-12 / -	DL1HB	- / +6	2	✓ Closing fragment
10-21 16:59	160m	-6 / -9	IW4AOT	-2 / +9	4	✓ Full exchange observed
10-21 16:56	80m	+6 / -	YB1LIN	- / -6	4	Partial capture
10-15 17:12	160m	-9 / +1	OM7AQV	+1 / -	4	✓ Closing observed
10-15 17:05	40m	+10 / -	R8LCA	- / -8	4	✓ Closing fragment
10-15 17:04	40m	+9 / +2	OH3OJ	0 / +9	4	✓ Full exchange observed
10-15 17:03	40m	+10 / -2	RC9WC	-24 / -3	3	✓ Full exchange observed
10-15 17:02	40m	- / -	II6JOTA	-20 / -	2	✓ Closing fragment
10-15 16:59	40m	+6 / -	EA7GNO	- / -22	3	✓ Closing fragment
10-15 16:58	40m	+8 / -	R7MP	-13 / +7	3	✓ Closing observed
10-15 16:55	40m	+17 / -	DD4JN	-10 / -6	4	✓ Closing observed
10-15 16:55	40m	+16 / -	DJ3HW	0 / +5	6	✓ Full exchange observed
10-15 16:54	40m	+13 / -	BI4JJO	- / -13	2	✓ Closing fragment
10-15 16:53	40m	+10 / +4	SH7KAT	-22 / -8	3	✓ Full exchange observed
10-15 16:49	40m	+7 / -	JT1DN	- / -13	3	Partial capture
10-13 16:34	160m	- / -4	SQ7LQT	-2 / -	5	Partial capture
10-13 16:30	160m	-11 / -	DF4JH	- / -10	2	✓ Closing fragment
10-13 16:28	160m	-10 / -4	HA5AO	+2 / -	3	✓ Closing observed
10-12 16:58	160m	-10 / -	SV7BVM	- / -4	2	Partial capture
10-12 16:57	160m	-13 / -	R9SAP	- / -14	3	Partial capture
10-09 16:17	160m	-1 / -	HA1DAE	+15 / -	5	✓ Full exchange observed
10-09 16:16	160m	- / -	IW5ABF	-22 / -	3	Partial capture
10-09 16:14	160m	-10 / -18	YO7CFD	-6 / -8	4	✓ Full exchange observed
10-08 18:19	160m	-6 / -	YL2EA	- / +7	2	Partial capture
10-08 18:16	160m	-9 / -6	SM7XON	-10 / +3	4	✓ Full exchange observed
10-05 16:17	160m	-6 / -19	LZ2IP	+10 / -	10	✓ Full exchange observed
10-05 16:15	80m	+6 / -	R80SAA	- / -	2	Partial capture
10-05 16:13	80m	+16 / -	K6VHF/HR9	- / +6	2	Partial capture
10-04 16:43	160m	-3 / -	SV4FFK	- / -6	3	✓ Closing fragment
10-04 16:41	160m	-1 / -18	UA3ZUX	+4 / -	5	✓ Full exchange observed
10-04 16:40	160m	+2 / -	M0CTP	- / -7	2	✓ Closing fragment
10-04 16:37	160m	-2 / -	SV4FFK	- / -12	3	Partial capture
10-02 16:08	160m	- / -	SP3BPU	+2 / -	2	✓ Closing fragment
09-30 19:12	160m	-7 / -	DK7ZT	-12 / -	2	✓ Closing observed
09-29 15:13	40m	+11 / -	DA0M	- / -17	3	✓ Closing fragment
09-29 15:12	40m	+12 / +3	PD0LBY	-19 / +4	5	✓ Full exchange observed
09-29 15:10	40m	+12 / -	TA2EE	- / -8	3	✓ Closing fragment
09-29 15:09	40m	+12 / -	YB8DYX	- / -18	2	✓ Closing fragment
09-29 15:08	40m	+10 / -	HB9ELE	+11 / -	3	✓ Full exchange observed
09-28 16:27	160m	-14 / -5	UT4WT	-4 / +5	6	✓ Full exchange observed
09-28 16:26	160m	-16 / -	DL1GPS	- / -18	2	✓ Closing fragment
09-28 16:23	80m	+12 / -	DG9NAY	- / +3	2	✓ Closing fragment
09-28 16:21	80m	+11 / -	DL4ZP	- / -3	3	✓ Closing fragment
09-28 16:19	80m	+8 / +10	DF0AWG	+10 / -	3	✓ Full exchange observed
09-28 16:16	80m	+12 / -	VE3GLN	- / -16	2	Partial capture
09-27 16:46	160m	+2 / -	R1IV	- / -13	2	Partial capture
09-27 16:46	160m	- / -	UT7UA	+20 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
165930  -1 2200  DM4ZUL IW4AOT R-09
165945  -5 1202  IW4AOT DM4ZUL RR73
170000  -3 2200  DM4ZUL IW4AOT 73
170030  -8 1202  DL1HB DM4ZUL +06 (x2)
170145 -19 1202  SM2OTU DM4ZUL -13 (x3)
160800 -15 1201  OK1FRG DM4ZUL +26
160815 +11  442  DM4ZUL OK1FRG R+03
160830 -15 1201  OK1FRG DM4ZUL RR73
160845  +4  442  DM4ZUL OK1FRG 73
160915  -3 1647  DM4ZUL LY3BRA R-09
160930 -16 1201  LY3BRA DM4ZUL RR73
160945  -2 1647  DM4ZUL LY3BRA 73

40m

UTC    dB Audio  Message
170300 -24 1396  <DM4ZUL> II6JOTA 73
170315 +10  532  RC9WC DM4ZUL R-03 (x2)
170400  -9  460  DM4ZUL OH3OJ +02
170415  +9  532  OH3OJ DM4ZUL R+09
170430  +1  460  DM4ZUL OH3OJ RR73 (x2)
170515 +11  532  DA0M DM4ZUL RR73
170545 +13  532  R8LCA DM4ZUL -08 (x4)
160130 +15  646  OH3BYZ DM4ZUL +01
160300 +17  563  HB9ITZ/P DM4ZUL +07
160430 +18  563  LX/DF2SD DM4ZUL -07

80m

UTC    dB Audio  Message
161945  +7 1129  DF0AWG DM4ZUL RR73
162130  +5 1130  DL4ZP DM4ZUL -03 (x3)
162300 +10 1129  DG9NAY DM4ZUL +03 (x2)
161315 +17  842  K6VHF/HR9 DM4ZUL +06 (x2)
161430  +5 1451  DM4ZUL RR73; UA3FH <...> -10
161530  +4  841  R80SAA DM4ZUL +11 (x2)
165615  +9  829  YB1LIN DM4ZUL -06 (x4)

10m

UTC    dB Audio  Message
143715  +2  821  4X6ST DM4ZUL -08 (x2)
143900  +6  821  PY2FUI DM4ZUL RR73
143930  +2  821  DO9BAU DM4ZUL -16 (x2)
144245  -3  822  UX7QV DM4ZUL +13 (x2)
144400  -7  822  LU6YR DM4ZUL -12 (x3)
144530 -16  822  F6FDY DM4ZUL +19
082245  -8 1298  DM4ZUL RA9ACA R+01 (x2)
082315 -23 1603  DM4ZUL RA9AAA 73
082345  -6 1297  DM4ZUL RA9ACA 73

20m

UTC    dB Audio  Message
134815  +3  723  F5OYA/P DM4ZUL -07
134845 -11 1222  <...> DM4ZUL -07
135000 -14 1222  DM4ZUL EB3JT JN01 (x3)
070100 -13 1618  DM4ZUL <...> R-10

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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