RZ4FWA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO23

Receiver-side FT8 activity involving RZ4FWA, decoded by SO8OO in southeastern Poland. 14,970 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 71 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-03.

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 14,970 FT8 messages attributed to RZ4FWA as the transmitting token by decoded message structure across 71 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (86%), followed by 10 m (6%) and 40 m (6%). The busiest six-hour window was 15:00-21:00 UTC, containing 37% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11.5 dB.

Overview

14,970

Messages attributed

UTC dates decoded

1,741

Active 15-min windows

-11.5 dB

Estimated median S/N

Bands

160m · 101 80m · 128 40m · 891 20m · 12,939 10m · 911

First attributed message: 2026-06-06
Last attributed message: 2026-09-03 02:29 UTC

Observed FT8 message patterns

Attributed sample: 14,970 messages
Active dates: 71 UTC dates
Estimated median S/N: -11.5 dB
Estimated 10th-90th percentile: -20 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4,507, moderate (-15 to -9 dB) 4,691, strong (≥ -8 dB) 5,772.

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 RZ4FWA in decoded directed-looking exchanges:

DL3TX · Fed. Rep. of Germany ×4 UA1TAN · European Russia ×3 F4NGR · France ×3 RW1C · European Russia ×3 IK4LZH · Italy ×3 UE6DR · European Russia ×3 UE7DR · European Russia ×3 F4JEH · France ×2 RK3AQ · European Russia ×2 UI6O · European Russia ×2 PE1MMZ · Netherlands ×2 PA2PS · Netherlands ×2

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 RZ4FWA

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: LO23 · 12,690 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,639 km (approx.)
Last such locator decoded: 2026-09-03 02:29 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	RZ4FWA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 04:27	40m	- / 0	RD6OX	+1 / -	2	✓ Closing fragment
09-03 02:28	40m	-10 / -	SP9WLC	- / -	2	Partial capture
09-03 02:23	40m	-18 / -	UR5SG	- / -	3	Partial capture
09-03 01:45	80m	- / -10	LZ1KU	-24 / -	2	✓ Closing fragment
09-03 01:33	40m	- / -	TA2EE	-16 / -	3	Partial capture
09-03 01:30	40m	-15 / -13	IU0NAD	0 / -	5	✓ Full exchange observed
09-03 01:23	40m	-19 / -	SV3CEZ	- / -11	2	✓ Closing fragment
09-03 01:15	40m	-17 / -	ON5VN	- / -	4	Partial capture
09-03 01:09	40m	-12 / -18	IW2MYH	-12 / -	3	✓ Closing observed
09-03 01:00	40m	-15 / -	RI1FJL	- / -14	4	✓ Closing fragment
09-03 00:57	40m	-15 / -7	MW0UPH	-16 / -	4	Partial capture
09-03 00:54	40m	-19 / -	HI8J	- / -	3	Partial capture
09-03 00:38	40m	- / -19	RA1OIE	-14 / -	3	Partial capture
09-03 00:32	40m	-18 / -	OH6FSO	- / -20	4	Partial capture
09-03 00:29	40m	- / -16	GM6URC	-13 / -	3	Partial capture
09-02 22:23	40m	- / -12	M6XZD	-5 / -	3	✓ Closing fragment
09-02 22:08	40m	-17 / -	VJ6X	- / -	3	Partial capture
09-02 22:06	40m	-18 / -	OD5ZZ	- / -	3	Partial capture
09-02 22:00	40m	- / -14	DF8XC	+8 / -	2	Partial capture
09-02 21:09	40m	- / -3	OZ0ZZ	+16 / -	2	✓ Closing fragment
09-02 20:59	40m	- / -17	E75C	-12 / -	2	Partial capture
09-02 20:51	40m	-24 / -	PA2HD	- / -5	2	Partial capture
09-02 20:48	40m	- / -25	G8WVB	-17 / -	4	Partial capture
09-02 20:44	40m	-16 / -	UB3FBD	- / -	2	Partial capture
09-02 20:37	40m	- / -12	HB9/ON4AEO	-4 / -	5	Partial capture
09-02 20:22	40m	-18 / -14	HB9EDG	-4 / -	11	Partial capture
09-02 20:19	40m	-18 / -	EA5KB	- / -	2	Partial capture
09-02 20:17	40m	-19 / -24	ON4CJU	+1 / -16	4	✓ Full exchange observed
09-02 20:15	40m	-14 / -	R7CA	- / -	2	Partial capture
09-02 04:01	40m	-18 / -	DL8TV	- / -	2	Partial capture
09-02 03:47	40m	- / -9	RX3DCZ	-8 / -	2	✓ Closing fragment
09-02 03:42	40m	-14 / -17	F4DIA	0 / -9	10	✓ Full exchange observed
09-02 03:40	40m	-12 / -	YO7HNP	- / -	2	Partial capture
09-02 03:39	40m	-12 / -	F5OYA/P	- / -	2	Partial capture
09-02 03:06	40m	-16 / -	OH3DJP	- / -	2	Partial capture
09-02 02:59	40m	- / -9	SP9UPH	-15 / -	2	✓ Closing fragment
09-02 02:35	40m	- / -	TA2EE	-13 / -	2	Partial capture
09-02 02:32	40m	-19 / -	EW6TW	- / -6	6	✓ Closing fragment
09-02 02:21	40m	-12 / -	YT2FA	- / -	2	Partial capture
09-02 02:19	40m	-18 / -	F1BLQ	- / -	2	Partial capture
09-02 02:15	40m	-15 / -	UR5SG	- / -	3	Partial capture
09-02 02:13	40m	-14 / -	DL1OBF	- / -	3	Partial capture
09-02 02:11	40m	-20 / -	HA7JDU	- / -	3	Partial capture
09-02 02:09	40m	-20 / -	SV0LS	- / -	2	Partial capture
09-02 02:06	40m	-15 / -	LZ2VM	- / -22	6	Partial capture
09-02 02:04	40m	-16 / -	UT2PC	- / -	3	Partial capture
09-02 02:01	40m	-18 / -22	IT9EUT	-21 / -	7	Partial capture
09-02 01:53	40m	-20 / -11	EA1AOC	-10 / -	4	Partial capture
09-02 01:34	40m	-19 / -	IW2MYH	- / -	2	Partial capture
09-02 01:32	40m	-19 / -12	R7ZL	-6 / +5	3	✓ 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
013115  +0 1596  RZ4FWA IU0NAD -13
013130 -16 2043  IU0NAD RZ4FWA R+19
013145  +1 1597  RZ4FWA IU0NAD RR73
013200 -15 2043  IU0NAD RZ4FWA 73
013315 -18 2042  RZ4FWA TA2EE KM69 (x3)
013700 -15 2043  K1HC RZ4FWA LO23
022345 -19 2043  UR5SG RZ4FWA LO23 (x3)
022830  -9 2043  SP9WLC RZ4FWA LO23 (x2)
042715  +3 2307  RZ4FWA RD6OX +00 (x2)

80m

UTC    dB Audio  Message
175715 -10 2117  RZ4FWA R4UA LO24
175730 -13 2174  RX6LG RZ4FWA LO23 (x3)
180315  -5 1381  RZ4FWA RX6LG -09
180715 -14 2173  RX4CG RZ4FWA LO23 (x3)
180830 -12 1326  RZ4FWA RX4CG +03
180845 -14 2173  RX4CG RZ4FWA R+13 (x2)
181030 -13 2173  RW4HBD RZ4FWA LO23
181115 -20 1910  RZ4FWA RW4HBD -06
014530 -24 1375  RZ4FWA LZ1KU -10 (x2)

20m

UTC    dB Audio  Message
081630  +7 2441  RZ4FWA EA7R -14
081630  +5 2066  UT3SO RZ4FWA LO23
081700  +1 2441  RZ4FWA EA7R -14
081700  +2 2066  UT3SO RZ4FWA LO23 (x2)
081915  +0 2066  DH8KAM RZ4FWA LO23
082015  -1 2066  TA7TC RZ4FWA LO23
082330 -13 2066  <...> RZ4FWA LO23
083130 -16 2066  E79KO RZ4FWA LO23
083445 -14 2066  IS0BOY RZ4FWA LO23
084130  -6 2066  PD0TON RZ4FWA LO23
084515  -3 2067  EA8ACW RZ4FWA LO23 (x2)
084745 +15 1413  RZ4FWA DK6KJ -07 (x2)

10m

UTC    dB Audio  Message
113115  -2  943  RZ4FWA SV2HJW KN10
114045 -10  991  RZ4FWA SV2CLJ KN10 (x4)
104800 -19 2110  RZ4FWA RZ6LY -15 (x2)
145715 -23 2109  4S7AB RZ4FWA LO23 (x2)
151400 -22 2110  RA1PO RZ4FWA LO23
070545 -11 1220  RZ4FWA RA6ANN +01
072445 -17 1593  RZ4FWA RW3QW -16
073845 -10 2032  RZ4FWA F6JON/QRP +01 (x3)

160m

UTC    dB Audio  Message
200200 -24 1971  CQ RZ4FWA LO23 (x6)
201115  +9 2557  RZ4FWA IK0HBN JN62 (x2)
201230 -23 1971  CQ RZ4FWA LO23 (x2)
202045 -19 1764  RZ4FWA RW2Z KO81 (x2)
202745 -20 1727  RZ4FWA R3TKN +05
202930 -24 1971  RN4HAB RZ4FWA R+05
204615 -24 1971  RK6OV RZ4FWA 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.

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