NP4L — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Puerto Rico Most frequent locator attributed to this token: FK68

Receiver-side FT8 activity involving NP4L, decoded by SO8OO in southeastern Poland. 25 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-08 and 2026-09-09.

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 25 FT8 messages attributed to NP4L 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 (100%). In this small sample, the estimated median decoder S/N was -15 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

40m · 25

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

Observed FT8 message patterns

Attributed sample: 25 messages
Active dates: 2 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -19 to -11 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 0.

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 NP4L in decoded directed-looking exchanges:

ON6AA · Belgium ×2 G0ORC · England G5TV · England IK4LZH · Italy J38LD · Grenada K2HT · United States PD0RCQ · Netherlands R2DGN · European Russia R3VS · European Russia RA1QEA · European Russia RL3DA · European Russia RN3GB · European Russia

Most frequent locator attributed to NP4L

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: FK68 · 16 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,360 km (approx.)
Last such locator decoded: 2026-09-09 00:14 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	NP4L S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-09 00:12	40m	-16 / -	WB8UFC	- / -8	2	✓ Closing fragment
09-09 00:07	40m	-14 / -	K2HT	- / +2	2	✓ Closing fragment
09-09 00:00	40m	-13 / -	Z31B	- / -	6	Partial capture
09-08 23:37	40m	-18 / -	J38LD	-8 / +8	7	✓ Closing observed
09-07 06:48	40m	- / -16	PE1OID	-13 / -	4	Partial capture
09-04 00:01	40m	- / -18	R2BQM	+1 / -	6	Partial capture
09-04 00:00	40m	- / -	UG4L	-6 / -	2	Partial capture
09-03 23:43	80m	- / -18	LA3BO	+8 / -	2	✓ Closing fragment
09-03 23:34	80m	- / -18	TF3VS	-1 / -	3	✓ Closing fragment
09-03 22:11	40m	- / -	G7KCK	-10 / -	2	Partial capture
09-03 00:32	80m	- / -	G3SBP	-16 / -	8	Partial capture
09-03 00:31	80m	- / -15	ON6AA	+3 / -	3	✓ Closing fragment
09-03 00:19	80m	- / -	ON6AA	+14 / -	6	Partial capture
09-03 00:10	80m	- / -	EA1IOK	-22 / -	2	✓ Closing fragment
09-03 00:10	80m	- / -	ON6AA	-3 / -	6	Partial capture
08-28 23:39	40m	- / -18	G0ORC	-3 / -	3	✓ Closing fragment
08-28 23:38	40m	- / -	SP9CVY	-11 / -	3	Partial capture
08-28 23:35	40m	- / -6	UR1CCT	-7 / -	3	✓ Closing fragment
08-28 23:12	40m	- / -11	RL3DA	+8 / -	6	✓ Closing fragment
08-28 23:10	40m	- / -14	ON6AA	+8 / -	4	✓ Closing fragment
08-28 23:10	40m	- / -	RJ6B	+11 / -	16	Partial capture
08-28 23:05	40m	- / -	RJ6B	0 / -	5	Partial capture
08-28 23:03	40m	- / -13	R2DGN	+1 / -	4	✓ Closing fragment
08-28 23:03	40m	- / -	ON6AA	+12 / -	3	Partial capture
08-28 23:02	40m	- / -10	MI7XHT	-13 / -	4	Partial capture
08-28 22:53	40m	- / -	ON6AA	+8 / -	3	Partial capture
08-28 22:53	40m	- / -12	R2BQM	+6 / -	6	Partial capture
08-13 23:43	40m	- / -12	UA4FKT	-10 / -	2	Partial capture
08-13 23:42	40m	- / -13	R2BQM	-11 / -	4	Partial capture
08-04 00:36	80m	- / -19	SP1ZMO	+3 / -	5	Partial capture
08-04 00:22	80m	- / -16	GM4CXM	-7 / -	4	Partial capture
07-30 01:19	40m	- / -12	RN3GB	0 / -	3	✓ Closing fragment
07-29 02:13	80m	- / -	9A4ZM	+14 / -	2	Partial capture
07-21 00:38	40m	- / -12	R2EA	+2 / -	3	Partial capture
07-21 00:35	40m	- / -16	R2EA	-3 / -	2	Partial capture
07-21 00:26	40m	- / -11	R2EA	0 / -	5	Partial capture
07-21 00:21	40m	- / -15	RA1QEA	-6 / -	7	✓ Closing fragment
07-21 00:20	40m	- / -	RZ1AS	-22 / -	2	Partial capture
07-21 00:18	40m	- / -15	PD0RCQ	-10 / -	3	✓ Closing fragment
07-21 00:14	40m	- / -	PD0RCQ	-12 / -	2	Partial capture
07-21 00:13	40m	- / -9	R3VS	-21 / -	2	✓ Closing fragment
07-21 00:11	40m	- / -8	UA3PAB	-8 / -	3	✓ Closing fragment
07-21 00:11	40m	- / -16	R2EA	0 / -	5	Partial capture
07-21 00:08	40m	- / -	DH1KJ	-6 / -	3	Partial capture
07-21 00:08	40m	- / -19	IK4LZH	0 / -	6	✓ Closing fragment
07-21 00:07	40m	- / -	PD0RCQ	-14 / -	3	Partial capture
07-12 22:48	20m	- / -	DL1JSO	-14 / -	2	Partial capture
07-12 22:48	20m	- / -	R7OV	-18 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
000315 -15 1580  Z31B NP4L FK68 (x2)
000515 -11 2094  G5TV NP4L RR73
000545  -9 2094  CQ NP4L FK68
000645 -11 1580  KG9OH NP4L -20
000745 -14 1580  K2HT NP4L +02 (x2)
000945 -18 1581  UR4QWW NP4L -18
001115 -15 1580  CQ NP4L FK68 (x2)
001215 -16 1580  WB8UFC NP4L -08 (x2)
001315 -19 1581  CQ NP4L FK68                          a1 (x3)

80m

UTC    dB Audio  Message
003330 -11 2503  NP4L G3SBP IO80 (x6)
004600  -6 2206  NP4L F5HNQ IN98 (x2)
005415 -24 1030  NP4L W8LRL FM19
233430  +1 2021  NP4L TF3VS HP94 (x3)
233930  -9 2279  NP4L F5HNQ IN98
234300  +7 1407  NP4L LA3BO -18 (x2)

20m

UTC    dB Audio  Message
224815 -20 1504  NP4L R7OV KN87
224815 -15 2247  NP4L DL1JSO JO60
224845 -19 1504  NP4L R7OV KN87
224845 -13 2247  NP4L DL1JSO JO60
224915 -22 1504  NP4L R7OV KN87 (x2)
224945 -10 2720  NP4L DL1R JN58
225045 -16 1504  NP4L R7OV KN87

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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