R4RZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO55

Receiver-side FT8 activity involving R4RZ, decoded by SO8OO in southeastern Poland. 1,066 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 54 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-13.

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 1,066 FT8 messages attributed to R4RZ as the transmitting token by decoded message structure across 54 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 80 m (34%) and 20 m (12%). Most decodes (58%) fell within the six-hour window 20:00-02:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (62%); the estimated median was -6 dB.

Overview

1,066

Messages attributed

UTC dates decoded

220

Active 15-min windows

-6 dB

Estimated median S/N

Bands

160m · 54 80m · 364 40m · 524 20m · 124

First attributed message: 2026-06-07
Last attributed message: 2026-10-13 22:11 UTC

Observed FT8 message patterns

Attributed sample: 1,066 messages
Active dates: 54 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -16.3 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 130, moderate (-15 to -9 dB) 280, strong (≥ -8 dB) 656.

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 R4RZ in decoded directed-looking exchanges:

R5BM · European Russia ×2 RK3BM · European Russia ×2 UG4L · European Russia ×2 EA1IOK · Spain ×2 JY5IB · Jordan ×2 R3ICU · European Russia ×2 RA6OY · European Russia ×2 RY3F · European Russia ×2 EA5JKT · Spain ×2 UB0SMX/P · Asiatic Russia ×2 LX1NO · Luxembourg PD0HLA · Netherlands

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 R4RZ

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: LO55 · 561 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,045 km (approx.)
Last such locator decoded: 2026-10-13 22:04 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	R4RZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-13 22:10	80m	+2 / -10	SP2ADY	+1 / -10	5	✓ Full exchange observed
10-13 22:08	80m	-3 / -	R2BPS	-6 / -10	3	✓ Closing observed
10-13 22:05	80m	+2 / -16	EA5JKT	-10 / -20	9	✓ Full exchange observed
10-13 22:04	80m	-3 / -	TF4M	-18 / -17	5	✓ Closing observed
10-12 22:11	80m	- / -	IU5HIU	-16 / -	2	Partial capture
10-12 02:10	80m	-11 / -	RA6LTD	- / +1	2	✓ Closing fragment
10-12 02:09	80m	- / -	ON8WR	-2 / -	2	Partial capture
10-12 02:08	80m	-7 / -	T77RN	-10 / -22	4	✓ Closing observed
10-12 02:06	80m	-12 / -16	9H6C	-14 / -21	4	✓ Full exchange observed
10-11 14:04	40m	-5 / -	KD6WW	- / -17	3	✓ Closing fragment
10-11 13:44	40m	-21 / -	3D2HM	- / -	2	Partial capture
10-11 13:43	40m	-17 / -	RQ3D	- / -2	2	✓ Closing fragment
10-11 13:38	40m	-10 / -	DV4ZAR	- / -12	6	✓ Closing fragment
10-11 13:31	40m	-9 / -	YH1AZ	- / -15	2	✓ Closing fragment
10-11 13:30	40m	-11 / -	R9OON	- / -6	2	✓ Closing fragment
10-11 13:28	40m	-12 / -	VR2VDD	- / -	2	Partial capture
10-11 13:26	40m	-10 / -	YD1HFH	- / -15	4	✓ Closing fragment
10-11 13:16	40m	-10 / -	YJ1JXZ	- / -18	3	✓ Closing fragment
10-11 13:06	40m	-18 / -	YJ1JXZ	- / -	2	Partial capture
09-29 22:20	40m	-11 / -	EA1IOK	- / -16	3	✓ Closing fragment
09-29 22:18	40m	-12 / -	XV9B	- / -18	3	✓ Closing fragment
09-29 22:05	40m	-15 / -	PY6BK	- / -	2	Partial capture
09-29 22:02	40m	-19 / -	A99AA	-9 / -	2	✓ Closing observed
09-29 22:02	40m	- / -	KC1WAY	-20 / -	2	Partial capture
09-29 22:00	40m	-16 / -	UN7EG	- / -	2	Partial capture
09-29 21:34	40m	-15 / -	LZ3CB	-8 / -3	3	✓ Closing observed
09-29 21:33	40m	-4 / -	DU3AW	- / -	2	Partial capture
09-29 21:27	40m	-18 / -	DU3AW	- / -	2	Partial capture
09-29 14:11	40m	-6 / -	UA0WF	- / -6	4	✓ Closing fragment
09-29 14:10	40m	-2 / -	R9FGJ	- / -4	2	✓ Closing fragment
09-29 14:06	40m	-6 / -	RN0D	- / -11	6	✓ Closing fragment
09-28 22:51	40m	-2 / -15	V47YA	-10 / -20	8	✓ Full exchange observed
09-28 22:48	80m	-6 / -	R3ICU	- / -21	3	✓ Closing fragment
09-28 22:46	80m	-2 / -	UA6JQ	- / -10	2	✓ Closing fragment
09-28 22:44	80m	0 / -2	DO5UH/P	+12 / -10	5	✓ Full exchange observed
09-28 22:40	80m	-2 / -10	UA9SY	-19 / -	7	✓ Closing observed
09-28 22:40	80m	- / -	DO1OAS	0 / -	10	Partial capture
09-28 22:40	80m	-2 / -15	DO5PY	-1 / -19	6	✓ Full exchange observed
09-28 22:39	80m	- / -	ON4MAP	-13 / -	5	Partial capture
09-28 22:38	80m	0 / -	R9OAE	- / -11	2	✓ Closing fragment
09-28 22:34	80m	0 / -9	GM0OPS	+2 / -3	7	✓ Full exchange observed
09-28 22:32	80m	+2 / -2	RD4CAF	-10 / -2	3	✓ Full exchange observed
09-28 22:31	80m	-5 / -13	SV2AEL	+3 / -2	5	✓ Full exchange observed
09-28 22:30	80m	0 / -	RK0SC	- / -	2	Partial capture
09-28 22:26	80m	-6 / -	R5BM	+2 / +2	6	✓ Full exchange observed
09-28 22:26	80m	-3 / -	EA6Y	+7 / -12	5	✓ Closing observed
09-28 21:02	40m	+2 / -	ZC4OL	- / -	8	Partial capture
09-28 20:57	40m	-2 / -	OM1FED	- / -13	2	✓ Closing fragment
09-28 20:54	40m	-3 / -	OM3PR	- / -4	2	✓ Closing fragment
09-28 20:50	40m	-3 / -	KG6JDX	- / -24	6	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
220700 -13 1946  R4RZ EA5JKT IM99
220815  +2 1947  EA5JKT R4RZ -20
220830  -6  335  R4RZ R2BPS KO85
220845  -5 1947  R2BPS R4RZ -10
220900 -13 1946  R4RZ EA5JKT R-16
220915  -1 1947  R2BPS R4RZ RR73
220930  -9 1946  R4RZ EA5JKT R-16
220945  +3 1947  EA5JKT R4RZ RR73
221000  -5 1946  R4RZ EA5JKT 73
221030  +2 2177  R4RZ SP2ADY JO84
221045  +1 1509  SP2ADY R4RZ -10
221100  +3 2177  R4RZ SP2ADY R-10
221115  +3 1509  SP2ADY R4RZ RR73
221130  -2 2177  R4RZ SP2ADY 73
221200 -19 2167  R4RZ IU5HIU JN53

40m

UTC    dB Audio  Message
133415  -7 1935  DV4ZAR R4RZ LO55 (x7)
134345 -16 2088  RQ3D R4RZ -02 (x2)
134445 -19 2089  3D2HM R4RZ LO55 (x2)
140430  -4 2364  KD6WW R4RZ LO55 (x3)
022730 -18 1645  R4RZ C5R RR73

160m

UTC    dB Audio  Message
201830 -24 1595  CQ R4RZ LO55                          a1
202115 -24 1596  R8LCA R4RZ R-14
205445 -20 1596  IT9ODQ R4RZ LO55
220145 -24 1597  UG4L R4RZ LO55
220200  +4  751  R4RZ UG4L +03
220215 -24 1597  UG4L R4RZ R-03
220230  -1  751  R4RZ UG4L RR73
220245 -22 1596  UG4L R4RZ 73
220745 +14 2296  R4RZ YL2AO -07
220800 -13 1596  YL2AO R4RZ R-16
220815 +16 2296  R4RZ YL2AO RRR
220830 -13 1597  YL2AO R4RZ 73
231800 -23 1597  UA4CKN R4RZ LO55 (x2)
014815 -24 1389  LY3BRA R4RZ LO55

20m

UTC    dB Audio  Message
163300  +5 1697  R4RZ PE9JAN JO22
163315  -8 2481  BH4ECL R4RZ RR73
163345  -2 2481  CQ R4RZ LO55 (x2)
163430 +10 2480  R4RZ G7LHK IO92
163500  +2 1697  R4RZ PE9JAN JO22
163500 +11 2480  R4RZ G7LHK IO92
163515  -5 2479  G7LHK R4RZ -12
163530 +11 2480  R4RZ G7LHK IO92 (x3)
164045 -10 2479  YC2YIZ R4RZ LO55 (x4)

10m

UTC    dB Audio  Message
201645 -18 2199  R4RZ F8BQF JN05
201715 -10 2380  R4RZ R3KFT RR73
202130 -13 2650  R4RZ <ZA/KN7L> -08
202545  -5 2202  R4RZ RC3KR RR73
202715 -15 1909  R4RZ RA1AOB KO59 (x3)
074315 -17 2463  R4RZ R3XBS -10
075430 -11 2189  R4RZ DL8WEM R+02
085900 -12 2537  R4RZ RU3GF -09 (x3)
090430  -4 2529  R4RZ R1WBJ 73
175900  -7  396  R4RZ R3LC RR73
160215 -24 1712  R4RZ A61FJ -06

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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