RZ4AZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LN28

Receiver-side FT8 activity involving RZ4AZ, decoded by SO8OO in southeastern Poland. 2,353 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 78 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-17.

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 2,353 FT8 messages attributed to RZ4AZ as the transmitting token by decoded message structure across 78 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (96%), followed by 10 m (2%) and 40 m (2%). Most decodes (52%) fell within the six-hour window 02:00-08:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

2,353

Messages attributed

UTC dates decoded

388

Active 15-min windows

-10 dB

Estimated median S/N

Bands

40m · 37 20m · 2,270 10m · 46

First attributed message: 2026-06-06
Last attributed message: 2026-09-17 03:39 UTC

Observed FT8 message patterns

Attributed sample: 2,353 messages
Active dates: 78 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -19 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 529, moderate (-15 to -9 dB) 770, strong (≥ -8 dB) 1,054.

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 RZ4AZ in decoded directed-looking exchanges:

BG0EMF · China ×2 EX8ABR · Kyrgyzstan ×2 GB2WWA · England ×2 HZ1TT · Saudi Arabia ×2 PD8GB · Netherlands ×2 R3HH · European Russia ×2 RA1OW · European Russia ×2 UB8AHK · Asiatic Russia ×2 ZL1VAH · New Zealand ×2 IK2PZX · Italy ×2 7Q3WS · Malawi RA9AJ · Asiatic Russia

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 RZ4AZ

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: LN28 · 1,315 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,686 km (approx.)
Last such locator decoded: 2026-09-17 03:38 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	RZ4AZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 03:38	40m	-18 / -	DG0JDE/P	- / -17	2	Partial capture
09-17 03:37	40m	-10 / -	II0IHMG	- / -	2	Partial capture
09-17 03:31	40m	-17 / -	UA9SY	- / -8	3	✓ Closing fragment
09-17 03:25	40m	-23 / -	I6XVL	- / -13	3	✓ Closing fragment
09-01 15:56	40m	-14 / -3	R6DZO	-12 / -6	3	✓ Full exchange observed
09-01 15:55	40m	-10 / -13	YT7DX	+6 / -	3	✓ Closing observed
08-31 15:26	20m	0 / -	II7MGBR	- / -11	2	Partial capture
08-31 15:25	20m	0 / -	<...>	- / -	2	Partial capture
08-31 15:23	20m	+7 / -19	GB1FBS	+13 / -22	5	✓ Full exchange observed
08-31 03:42	20m	+6 / -	FR5CB	- / -	4	Partial capture
08-31 03:40	20m	+1 / -	BG0FQU	- / -	3	Partial capture
08-31 03:38	20m	+10 / -	SM7TZK	- / -13	3	✓ Closing fragment
08-31 03:37	20m	+15 / -	ZL1VAH	- / -25	3	✓ Closing fragment
08-31 03:36	20m	-2 / -	UB8AHK	- / -5	2	✓ Closing fragment
08-31 03:13	20m	- / +10	UN6PD	-22 / -	2	✓ Closing fragment
08-30 05:14	20m	-2 / -	R8AAU	- / -	2	Partial capture
08-30 05:12	20m	-1 / -	R1DM	- / -15	3	✓ Closing fragment
08-30 05:11	20m	+5 / -	9A1MM	- / -10	3	✓ Closing fragment
08-30 05:05	20m	-1 / -	IZ0MIO	- / -20	4	✓ Closing fragment
08-30 05:00	20m	+7 / -	SK2TT	- / -	6	Partial capture
08-30 04:52	20m	+8 / -	UB0SCV	- / -18	3	✓ Closing fragment
08-30 04:50	20m	+2 / -	RU3GF	- / -	2	Partial capture
08-30 04:36	20m	-15 / -	RC1TF	- / -12	4	✓ Closing fragment
08-30 04:36	20m	-15 / -	DL3FH	- / -14	3	✓ Closing fragment
08-30 04:32	20m	-5 / -	LZ1EV	- / -9	3	✓ Closing fragment
08-30 04:32	20m	-9 / -	SV2CCJ	- / -11	3	✓ Closing fragment
08-30 04:29	20m	+3 / -	<...>	- / -17	3	Partial capture
08-30 04:20	20m	-15 / -	YL4U	- / -12	2	✓ Closing fragment
08-30 04:14	20m	- / -7	RW9WJ	+4 / -	2	✓ Closing fragment
08-29 13:24	20m	-10 / -	BG8AOI	- / -26	2	✓ Closing fragment
08-29 10:09	20m	-5 / -1	DH9DR	+13 / -5	4	✓ Full exchange observed
08-29 10:06	20m	-18 / -	CU3HN	-9 / -24	5	✓ Closing observed
08-29 07:46	20m	-17 / -6	YO1BRANCUSI	+10 / -13	4	Partial capture
08-29 07:42	20m	-9 / -1	F1DXP	-2 / -16	4	✓ Full exchange observed
08-29 07:34	20m	-16 / -14	PE1MMZ	+4 / -24	4	✓ Full exchange observed
08-29 07:27	20m	-12 / -	Z31PM	- / -18	3	✓ Closing fragment
08-29 07:21	20m	-8 / -	IK2WJT	- / -22	3	✓ Closing fragment
08-29 07:20	20m	-14 / -8	AO5FSB	-6 / -	3	✓ Closing observed
08-29 06:34	20m	-1 / -	SP8ADU	- / -	2	Partial capture
08-29 06:31	20m	-18 / -	<...>	- / -17	2	Partial capture
08-29 06:24	20m	-8 / -	S57MPU	- / -12	2	Partial capture
08-29 05:37	40m	- / -15	EW8KO	-15 / -	2	Partial capture
08-29 05:31	40m	- / -13	DJ6OI	-5 / -	2	✓ Closing fragment
08-29 05:10	40m	- / -8	RL3QGD	-20 / -	4	✓ Closing fragment
08-28 15:23	40m	-20 / -11	EU6UE	-10 / -9	4	✓ Full exchange observed
08-28 15:12	40m	- / -18	DG3VB	+2 / -	2	✓ Closing fragment
08-28 15:06	40m	- / -7	R2AVW	0 / -	2	✓ Closing fragment
08-28 14:44	40m	-16 / -15	SQ9BDB	0 / -	3	✓ Closing observed
08-28 14:42	40m	- / -17	RA3WEO	+3 / -	2	✓ Closing fragment
08-28 14:38	40m	- / -14	3Z100LKK	-7 / -	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
032515 -24 1962  I6XVL RZ4AZ LN28 (x3)
032830  -1  731  RZ4AZ SV1ENG KM18
033045 -18 1420  SP100PKP RZ4AZ LN28
033115 -20 1419  UA9SY RZ4AZ LN28 (x3)
033300 -18 1514  SP3DOF RZ4AZ LN28
033515 -20 1911  9H4JX RZ4AZ LN28
033545  -4  710  RU4CC RZ4AZ LN28
033745 -10  707  II0IHMG RZ4AZ LN28 (x2)
033845 -19 1342  DG0JDE/P RZ4AZ LN28 (x2)

20m

UTC    dB Audio  Message
034230  +8  883  FR5CB RZ4AZ LN28 (x4)
152100 -15 1919  F5OQK RZ4AZ LN28
152230  -5 1432  II7MGXX RZ4AZ R-19
152330  +5  277  GB1FBS RZ4AZ LN28
152345 +13  272  RZ4AZ GB1FBS -19
152400  +8  277  GB1FBS RZ4AZ R-22
152415 +13  272  RZ4AZ GB1FBS RR73
152430  +7  277  GB1FBS RZ4AZ 73
152500  +2 2415  <...> RZ4AZ LN28 (x2)
152600  -3  678  II7MGBR RZ4AZ LN28 (x2)

10m

UTC    dB Audio  Message
090400  -5 1478  RZ4AZ LZ01MIKU -09 (x2)
124400 -19 2006  RZ4AZ 7Q3WS -09 (x2)
065445 -20 1333  RZ4AZ RA9AJ +03 (x2)
065545  -4 2877  RZ4AZ R6FX LN14 (x2)
143845 -11 2416  RZ4AZ F1PSX JN08 (x4)

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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