YO4NF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN44

Receiver-side FT8 activity involving YO4NF, decoded by SO8OO in southeastern Poland. 17,303 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 117 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-08.

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 17,303 FT8 messages attributed to YO4NF as the transmitting token by decoded message structure across 117 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (43%), followed by 40 m (35%) and 80 m (18%). Most decodes (55%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was -2 dB.

Overview

17,303

Messages attributed

117

UTC dates decoded

2,226

Active 15-min windows

-2 dB

Estimated median S/N

Bands

80m · 3,192 40m · 6,117 20m · 7,363 10m · 631

First attributed message: 2026-06-06
Last attributed message: 2026-10-08 04:31 UTC

Observed FT8 message patterns

Attributed sample: 17,303 messages
Active dates: 117 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -14 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,188, moderate (-15 to -9 dB) 3,356, strong (≥ -8 dB) 12,759.

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 YO4NF in decoded directed-looking exchanges:

TA3XEE · Asiatic Turkey ×6 DK5TX · Fed. Rep. of Germany ×3 DC7LR · Fed. Rep. of Germany ×3 DK4ET · Fed. Rep. of Germany ×3 DL6MRM · Fed. Rep. of Germany ×3 EA3JIJ · Spain ×3 F1SZC · France ×3 F4HSB · France ×3 G4FHL · England ×3 IU0VYT · Italy ×3 KT4ZG · United States ×3 M8MFU · England ×3

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 YO4NF

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: KN44 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 813 km (approx.)
Last such locator decoded: 2026-09-12 20:46 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	YO4NF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-08 04:31	40m	-10 / -	F4NJZ	- / -19	2	Partial capture
10-08 04:29	40m	-16 / -4	AM5CV	-6 / -11	3	✓ Full exchange observed
10-08 04:17	80m	+6 / -2	F4LRA	-5 / -17	5	✓ Full exchange observed
10-08 04:04	80m	+8 / -	PA2PF	-8 / -16	3	✓ Closing observed
10-08 04:02	80m	+15 / -	K5XI	- / -20	2	✓ Closing fragment
10-08 03:20	80m	+6 / -	LZ2BC	- / -18	2	✓ Closing fragment
10-08 02:24	80m	+8 / -	RN1CW	- / -2	2	Partial capture
10-08 01:48	80m	+4 / -	IU3WIX	-14 / -21	3	✓ Closing observed
10-08 01:11	80m	+10 / -	OM5FM	- / 0	2	Partial capture
10-08 01:06	80m	+8 / -	OM5FM	- / 0	2	Partial capture
10-08 00:35	80m	+7 / +10	IQ0SQ	+4 / -	3	✓ Closing observed
10-08 00:04	80m	+13 / -	M9TAM	- / -6	2	Partial capture
10-08 00:00	80m	+6 / -12	M9XPN	-20 / -20	4	✓ Full exchange observed
10-07 23:53	80m	+16 / -	M9XPN	- / -18	2	Partial capture
10-07 23:31	80m	+12 / -	SP2OVH	-4 / -8	4	✓ Full exchange observed
10-07 23:20	80m	+13 / -	M9XPN	- / -19	2	Partial capture
10-07 23:10	80m	+16 / -15	LA6AFA	0 / -1	4	✓ Full exchange observed
10-07 23:01	80m	+16 / +3	OK6RV	+4 / -2	2	Partial capture
10-07 22:33	80m	+10 / -	F5OYA/P	- / -8	2	Partial capture
10-07 22:30	80m	0 / +7	OK6RV	+12 / +1	2	Partial capture
10-07 22:28	80m	+11 / -	IT9GAK	- / -14	2	Partial capture
10-07 22:02	80m	+4 / 0	DK4CN	-9 / -10	4	✓ Full exchange observed
10-07 21:58	80m	+6 / -	DL4DP	-7 / -15	3	✓ Closing observed
10-07 21:57	80m	+4 / +2	2E1CAQ	-8 / -10	4	✓ Full exchange observed
10-07 21:48	80m	+12 / -	SP2ADI	-5 / -8	2	Partial capture
10-07 21:47	80m	+4 / -	SP4JSR	- / +1	2	✓ Closing fragment
10-07 21:45	80m	+8 / -	VK6WX	- / -17	2	✓ Closing fragment
10-07 21:35	80m	+2 / -10	F6ECB	-20 / -17	5	✓ Full exchange observed
10-07 21:34	80m	-4 / -	ON7PR	- / -17	2	✓ Closing fragment
10-07 21:25	80m	-10 / -2	IU3FVJ	-10 / -6	4	✓ Full exchange observed
10-07 21:20	80m	-2 / -	GM4JKZ	-15 / -15	3	✓ Closing observed
10-07 21:18	80m	+7 / +4	G3BOY	0 / -11	4	✓ Full exchange observed
10-07 21:10	80m	+13 / -14	E79KO	+6 / -11	4	✓ Full exchange observed
10-07 20:57	80m	+1 / +2	LB7RK	-17 / -12	3	✓ Full exchange observed
10-07 20:56	80m	+7 / +2	IW2JMS	-5 / -	2	✓ Closing observed
10-07 20:54	80m	+6 / -	SP2ADI	- / -7	2	Partial capture
10-07 20:51	80m	-2 / -	IW2JMS	- / -14	2	Partial capture
10-07 20:48	80m	+4 / -	ON1ACB	- / -17	2	✓ Closing fragment
10-07 20:46	80m	+5 / -	R8XF/M	- / -16	2	Partial capture
10-07 20:41	80m	+7 / -3	SP8TPS	+4 / -3	5	✓ Full exchange observed
10-07 20:38	80m	+8 / -	SP4JSR	- / -3	2	Partial capture
10-07 20:32	80m	+6 / -	SQ3RX	- / -5	2	Partial capture
10-07 20:28	80m	+2 / -	PA4RFS	- / -14	2	Partial capture
10-07 20:19	80m	+18 / +5	DL1CF	+4 / -16	5	✓ Full exchange observed
10-07 20:17	80m	-4 / -	R8XF/M	- / -19	2	Partial capture
10-07 20:15	80m	+2 / -	IU8DSS	- / -16	2	Partial capture
10-07 20:11	80m	+18 / -	VK3TZ	- / -18	2	✓ Closing fragment
10-07 20:06	80m	+10 / -	DL9PZ	- / -11	2	Partial capture
10-07 20:03	80m	+10 / -	DB100FT	- / -18	2	Partial capture
10-07 20:01	80m	+10 / -	VK3BDX	- / -6	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
024430 -10 1942  UN1EAK YO4NF -10 (x3)
032015  +3  982  N2CR YO4NF -17 (x2)
033915 -19 1677  F4LBZ YO4NF -24
034030  -5  924  YO4NF F4LBZ R+00 (x2)
034500 -19 1535  KG4VET YO4NF -18 (x2)
042915 -16 2129  AM5CV YO4NF -11
042930  -5 2128  YO4NF AM5CV R-04 (x2)
043100  -9 1933  F4NJZ YO4NF -19 (x2)

80m

UTC    dB Audio  Message
022445  +6 1814  RN1CW YO4NF -02
032030  +5 1903  LZ2BC YO4NF -18 (x2)
035530  +7 1399  IZ6IMN YO4NF -03
040215 +15 2480  K5XI YO4NF -20 (x2)
040415  +5 2257  PA2PF YO4NF -16 (x2)
040500  -8 2257  YO4NF PA2PF 73
041130  +9 1070  F4LRA YO4NF -12 (x3)
041815  -3 1069  YO4NF F4LRA R-02
041830  +2 1071  F4LRA YO4NF RR73
041845  -7 1069  YO4NF F4LRA 73

10m

UTC    dB Audio  Message
125845 -17 1136  YO4NF UR5LY 73
130000 -24 1635  DG0KU YO4NF -15 (x2)
130100 -18 1805  YD0ATZ YO4NF RR73
130230 -22 1464  HB9BQP YO4NF RR73
130715 -16  913  <...> YO4NF -14
134830 -22 1568  DJ8TX YO4NF -19 (x2)
135100  -1 2939  IV3IQY YO4NF -05
145030  -5 2748  YO4NF DL8DWL R+13
145500 -11 2517  YO4NF DL5EBS R-01
145915  +1  889  YO4NF DO5AU R-09 (x2)
130930  -1  565  YO4NF RA8CO R+08 (x2)

160m

UTC    dB Audio  Message
230600  -1 2206  YO4NF 9A4ZM JN86 (x2)

20m

UTC    dB Audio  Message
190600  -3 2823  YO4NF DM1AR R+01 (x2)
190730 -13 2468  YO4NF EA2WX/P 73
191815 -14 1831  YO4NF ON3ZEP/P R+02
192315  -9 3080  PD3ED YO4NF +01
192500 -14 1044  F5MAG YO4NF -07
192645  -1 2387  YO4NF EG7CQ 73
193000  -4 1043  YO4NF F5MAG R-09
193245 -17 1762  II7MGBA YO4NF -12
193615 -14 1325  G0WHO YO4NF -10 (x2)
193745  +1 1681  YO4NF IU2UEQ R+35 (x2)
193845 -19 1324  G0WHO YO4NF RR73
194145 -11  749  YO4NF VA3MPG R-11

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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UTC	Band	kHz	S/N · 500 Hz	WPM
2026-10-04 17:43:06	40m	7017.732	10.8 dB	—
2026-10-04 17:41:48	40m	7017.732	19.3 dB	33.3
2026-10-04 17:40:27	40m	7017.731	8.8 dB	33
2026-10-04 17:35:45	80m	3518.750	20.9 dB	33.3
2026-10-04 17:32:11	80m	3518.734	21.2 dB	27
2026-10-04 17:31:09	80m	3518.750	12.4 dB	32.2
2026-10-04 17:28:06	80m	3518.749	23.7 dB	33.6
2026-10-04 17:27:04	80m	3518.749	18.9 dB	33
2026-10-04 17:26:01	80m	3518.750	24.5 dB	33
2026-10-04 17:24:54	80m	3518.748	19.6 dB	—
2026-10-04 17:23:51	80m	3518.750	24.2 dB	32.8
2026-10-04 17:22:38	80m	3518.750	24.9 dB	32.8
2026-10-04 17:19:31	80m	3518.750	18.2 dB	32.2
2026-10-04 17:18:29	80m	3518.750	23.7 dB	33.3
2026-10-04 17:10:27	80m	3518.749	21.4 dB	—
2026-10-04 15:23:06	40m	7016.511	9.6 dB	32.8
2026-10-04 15:20:22	40m	7016.511	17.3 dB	33.9
2026-10-04 15:18:08	40m	7016.511	11.6 dB	33
2026-10-04 15:11:59	40m	7016.512	7.6 dB	32.2