WM4W — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM18

Receiver-side FT8 activity involving WM4W, decoded by SO8OO in southeastern Poland. 363 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 26 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-30.

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 363 FT8 messages attributed to WM4W as the transmitting token by decoded message structure across 26 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (67%), followed by 80 m (29%) and 40 m (4%). Most decodes (92%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11.8 dB.

Overview

363

Messages attributed

UTC dates decoded

Active 15-min windows

-11.8 dB

Estimated median S/N

Bands

80m · 105 40m · 16 20m · 242

First attributed message: 2026-06-07
Last attributed message: 2026-08-30 16:28 UTC

Observed FT8 message patterns

Attributed sample: 363 messages
Active dates: 26 UTC dates
Estimated median S/N: -11.8 dB
Estimated 10th-90th percentile: -21 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 100, moderate (-15 to -9 dB) 137, strong (≥ -8 dB) 126.

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 WM4W in decoded directed-looking exchanges:

RC6OD · European Russia ×3 9A5E · Croatia ×2 HB9EXE · Switzerland ×2 JY5IB · Jordan ×2 HI8UD · Dominican Republic ×2 US5ZAY · Ukraine ×2 4L1FL · Georgia 7Z1BQ · Saudi Arabia 9J2FI · Zambia A41ZZ · Oman A61CK · United Arab Emirates A61FJ · United Arab Emirates

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 WM4W

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: FM18 · 11 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,390 km (approx.)
Last such locator decoded: 2026-08-07 00:48 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	WM4W S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 00:20	80m	- / -7	S53X	-4 / -	4	✓ Closing fragment
08-30 00:19	80m	-20 / -16	US5ZAY	+4 / -21	5	✓ Full exchange observed
08-30 00:18	80m	- / -	DO1DX	-8 / -	4	Partial capture
08-30 00:16	80m	- / -	SV8JE	-4 / -	6	Partial capture
08-30 00:16	80m	-17 / -24	UA4FKT	-4 / -18	4	Partial capture
08-30 00:15	80m	-13 / -14	S54L	+8 / -5	3	✓ Full exchange observed
08-30 00:13	80m	- / -14	9A5E	0 / -	2	✓ Closing fragment
08-29 23:47	20m	- / -8	7Z1DJ	-18 / -	4	Partial capture
08-20 22:12	20m	-2 / -	A61OK	- / -21	3	Partial capture
08-20 21:38	20m	0 / -	CN8NS	- / -24	2	Partial capture
08-19 22:04	40m	- / -12	MI0TMW	-14 / -	3	Partial capture
08-16 19:14	20m	- / -	RW9WC	-15 / -	3	Partial capture
08-13 22:42	40m	- / -14	G5TV	-20 / -	4	✓ Closing fragment
08-13 22:05	20m	-23 / -	LY2TS	- / +2	2	Partial capture
08-08 02:12	20m	- / +2	CN8NS	-22 / -	2	Partial capture
08-07 01:51	20m	-16 / -	EP2AES	- / -15	3	Partial capture
08-07 01:35	80m	- / -	UW5KW	+14 / -	3	Partial capture
08-07 01:34	80m	-11 / -13	Z62NS	+8 / -17	11	Partial capture
08-07 01:31	40m	- / -12	UR7FM	-19 / -	6	Partial capture
08-07 01:12	20m	-12 / -	UN8DSW	- / -19	2	✓ Closing fragment
08-07 00:52	20m	- / 0	HB9EXE	-15 / -	3	✓ Closing fragment
08-07 00:48	20m	-15 / -4	9A5E	0 / -4	5	✓ Full exchange observed
08-05 02:48	80m	- / -	SV8JE	-4 / -	5	Partial capture
08-05 02:47	80m	-20 / -21	ER3ZW	+2 / -20	6	✓ Full exchange observed
08-05 02:07	80m	- / -10	CT2GQA	-15 / -	5	✓ Closing fragment
08-05 02:07	80m	- / -7	ON1JP	-17 / -	6	Partial capture
08-05 02:05	80m	- / -	DO8JB	+1 / -	11	Partial capture
08-05 01:59	40m	- / -14	SM7JKW	-17 / -	3	Partial capture
08-04 01:49	80m	-9 / -14	EW8CW	-4 / -18	6	Partial capture
08-04 01:49	80m	-9 / -15	UR4LBG	+1 / -20	10	Partial capture
08-04 01:49	80m	- / -	SP3BVI	+8 / -	2	Partial capture
08-04 01:48	80m	-6 / -13	RC6OD	+5 / -11	6	✓ Full exchange observed
08-04 01:46	80m	- / +8	VP2MAA	-16 / -	2	✓ Closing fragment
08-02 22:53	40m	- / -	IU0NAD	+1 / -	3	Partial capture
08-02 22:19	20m	- / +1	M0OVG	-8 / -	2	✓ Closing fragment
08-02 02:28	40m	- / -13	UA3DIB	-5 / -	3	✓ Closing fragment
08-02 02:17	20m	-12 / -	YL2KF	- / -9	2	Partial capture
08-02 02:15	20m	-8 / -	R2BQM	- / -3	2	✓ Closing fragment
08-02 02:14	20m	-8 / -	R9WJ	-19 / -16	2	Partial capture
08-02 02:13	20m	-10 / -	UA1AQC	- / -7	2	✓ Closing fragment
08-02 01:44	40m	- / -14	UI6O	-15 / -	3	Partial capture
08-02 01:22	20m	-8 / -	A41ZZ	- / -18	2	Partial capture
08-02 01:21	20m	-12 / -	HB9EXE	- / -9	3	✓ Closing fragment
08-02 01:18	20m	-14 / -	R9CP	- / -19	3	Partial capture
08-02 01:17	20m	-12 / -	OD5ZZ	- / -15	2	✓ Closing fragment
07-31 01:56	80m	-24 / -18	RX6DA	+4 / -15	4	Partial capture
07-31 01:54	80m	- / -	9A3AUH	+1 / -	9	Partial capture
07-31 01:51	80m	-4 / -4	EW8AAC	-6 / -24	9	✓ Full exchange observed
07-31 01:37	20m	-11 / -	A41ZZ	- / -6	2	Partial capture
07-31 00:38	80m	- / -	UA4FKT	+11 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
213000  -3  352  WM4W EB5DFU -06
213415 -23 1602  PD1RGW WM4W RR73
214100 -18 1090  OE1MSC WM4W +03
213845  -2 1226  CN8NS WM4W -24 (x2)
221230  -5 1180  A61OK WM4W -21 (x3)
234700 -17 1837  WM4W 7Z1DJ R-08 (x4)
154600  -8  969  WM4W LA5TTA R-14
162845 -22 2230  EP2AES WM4W -22
163045  -4 1357  WM4W SA3SHN 73

80m

UTC    dB Audio  Message
001830 -10  378  WM4W DO1DX JO30
001845 -20 1691  KF9TS WM4W RR73
001900  +4 1691  WM4W US5ZAY KN57
001900  -3  327  WM4W SV8JE KM08
001900  -7  378  WM4W DO1DX JO30
001915 -23 1692  US5ZAY WM4W -21
001930  +4 1691  WM4W US5ZAY R-16
001930  -9  378  WM4W DO1DX JO30
001945 -18 1692  US5ZAY WM4W RR73
002000  +4 1691  WM4W US5ZAY 73
002030  -5 2205  WM4W S53X JN65 (x4)
002615 -24 1691  VE1MDF WM4W -02

40m

UTC    dB Audio  Message
020100 -16 1291  WM4W SM7JKW R-14
013145 -23 1426  WM4W UR7FM R-12 (x6)
224245 -16 1590  WM4W G5TV IO93
224245 -22 1641  WM4W EA6TU R-11
224315 -22 1590  WM4W G5TV IO93 (x3)
220445 -15 1983  WM4W MI0TMW R-12 (x3)

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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