NR4O — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM05

Receiver-side FT8 activity involving NR4O, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-30 and 2026-09-14.

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 30 FT8 messages attributed to NR4O as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (97%), followed by 80 m (3%). In this small sample, the estimated median decoder S/N was -4 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 1 40m · 29

First attributed message: 2026-08-30
Last attributed message: 2026-09-14 00:49 UTC

Observed FT8 message patterns

Attributed sample: 30 messages
Active dates: 2 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -6 to -3 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 29.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with NR4O in decoded directed-looking exchanges:

IW0FFK · Italy M0UTD · England AI4FR · United States DL3MIB · Fed. Rep. of Germany EA1B · Spain EB3JT · Spain HB9IRO · Switzerland HB9TIH · Switzerland IK4RVY · Italy IN3WZS · Italy IS0AFM · Sardinia KQ4LTA · United States

Most frequent locator attributed to NR4O

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: FM05 · 13 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,754 km (approx.)
Last such locator decoded: 2026-09-14 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	NR4O S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 02:52	160m	- / -14	IW0FFK	+18 / -	2	✓ Closing fragment
09-14 03:33	40m	- / -8	IS0AFM	+1 / -	3	✓ Closing fragment
09-14 03:28	40m	- / -14	EB3JT	+6 / -	4	✓ Closing fragment
09-14 01:18	40m	- / -	PD0IFI	-24 / -	2	Partial capture
09-14 00:47	40m	-4 / -17	PC2J	-8 / -19	4	✓ Full exchange observed
09-14 00:44	40m	-3 / -	KZ4NJ	- / -4	2	✓ Closing fragment
09-14 00:44	40m	- / -	TA4SSK	+1 / -	2	Partial capture
09-14 00:42	40m	-6 / -5	HB9TIH	-14 / -19	6	✓ Full exchange observed
09-14 00:41	40m	- / -	PD0IFI	-19 / -	3	Partial capture
09-14 00:37	40m	-4 / -	VE3HLM	-9 / -	2	✓ Closing observed
09-14 00:35	40m	-4 / -	AI4FR	-4 / -1	4	✓ Full exchange observed
09-14 00:32	40m	-5 / -1	MI7XHT	-2 / -19	6	✓ Full exchange observed
09-14 00:31	40m	-4 / -5	SV9QWC	-4 / -	3	✓ Closing observed
08-30 11:43	20m	- / -14	M0UTD	+8 / -	2	✓ Closing fragment
08-30 05:56	80m	- / -	DO5HOK	-14 / -	2	Partial capture
08-30 05:54	80m	- / -	PA3T	-15 / -	2	Partial capture
08-30 05:52	80m	- / -	HB9CYT	-19 / -	6	Partial capture
08-30 05:51	80m	- / -	F4BYA	+1 / -	4	Partial capture
08-30 05:51	80m	- / -13	ON1JP	-21 / -	6	Partial capture
08-30 05:50	80m	- / -	DM2GM	-11 / -	3	Partial capture
08-30 05:50	80m	- / -	DO2SHJ	-8 / -	3	Partial capture
08-30 05:49	80m	- / -	G4ZFJ	+1 / -	6	Partial capture
08-30 05:43	80m	- / -5	G4AMT	-10 / -	2	✓ Closing fragment
08-30 04:52	40m	- / -	F5JQF	-13 / -	5	Partial capture
08-30 04:50	40m	- / -10	SV1SSL	-9 / -	6	✓ Closing fragment
08-30 04:49	40m	- / -5	IN3WZS	-9 / -	3	✓ Closing fragment
08-30 04:46	40m	- / -	IZ0MIO	+2 / -	2	Partial capture
08-30 04:46	40m	- / -17	DL3MIB	+10 / -	3	✓ Closing fragment
08-30 04:43	40m	- / -11	IK4RVY	+2 / -	2	✓ Closing fragment
08-30 04:41	40m	- / +7	HB9IRO	-2 / -	3	✓ Closing fragment
08-30 04:37	40m	- / -13	PT7RF	-15 / -	2	✓ Closing fragment
08-30 03:46	80m	- / -	DO1NAE	-8 / -	12	Partial capture
08-30 03:42	80m	- / -10	OK1UOZ	+10 / -	8	✓ Closing fragment
08-30 03:40	80m	- / -	IK5CHL	+2 / -	12	Partial capture
08-30 03:40	80m	- / -10	IK2LFF	-7 / -	16	Partial capture
08-30 03:38	80m	- / -10	LZ1KU	+8 / -	2	✓ Closing fragment
08-30 03:38	80m	- / -14	SP7XIF	+4 / -	8	Partial capture
08-29 04:13	20m	- / -18	5B4VL	-15 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
025245 +17  555  NR4O IW0FFK -14 (x2)

40m

UTC    dB Audio  Message
004745  -6 2908  PC2J NR4O -19
004800  -6 2908  NR4O PC2J R-17
004815  -3 2908  PC2J NR4O RR73
004830  -9 2908  NR4O PC2J 73
004845  -5 2908  CQ NR4O FM05
004915  -2 2908  KR4LQH NR4O +14
011800 -24 1394  NR4O PD0IFI JO32 (x2)
032815 +11 2909  NR4O EB3JT JN01 (x4)
033315  -1  796  NR4O IS0AFM -08 (x3)

20m

UTC    dB Audio  Message
041315 -16  990  NR4O 5B4VL -18 (x3)
114300  +9  284  NR4O M0UTD -14 (x2)

80m

UTC    dB Audio  Message
055245 -20 1338  NR4O HB9CYT JN36
055245  -4 2383  NR4O G4ZFJ JO01
055245  +2 2849  NR4O F4BYA JN19
055315 -18 1639  NR4O ON1JP -13 (x2)
055415 -17 1732  NR4O PA3T JO31
055415 -18 1338  NR4O HB9CYT JN36
055415 -18 1142  NR4O F6FTB JN27
055445 -13 1732  NR4O PA3T JO31
055445 -18 1338  NR4O HB9CYT JN36 (x3)
055645 -12  809  NR4O DO5HOK JO41 (x2)
055915 -12  333  NR4O EI4KF -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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