IU5VLR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IU5VLR, decoded by SO8OO in southeastern Poland. 2,277 FT8 messages attributed to this token as transmitter, on 40m, across 37 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-09-12.

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 2,277 FT8 messages attributed to IU5VLR as the transmitting token by decoded message structure across 37 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Most decodes (87%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

2,277

Messages attributed

UTC dates decoded

389

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 2,277

First attributed message: 2026-06-17
Last attributed message: 2026-09-12 22:40 UTC

Observed FT8 message patterns

Attributed sample: 2,277 messages
Active dates: 37 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 911, moderate (-15 to -9 dB) 682, strong (≥ -8 dB) 684.

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 IU5VLR in decoded directed-looking exchanges:

DG9FEH · Fed. Rep. of Germany ×2 DJ0MAB · Fed. Rep. of Germany ×2 DK5NC · Fed. Rep. of Germany ×2 DK9BF · Fed. Rep. of Germany ×2 DL2VN · Fed. Rep. of Germany ×2 DL9FCK · Fed. Rep. of Germany ×2 EA1FAW · Spain ×2 EC5M · Spain ×2 F4DIA · France ×2 IN3WZS · Italy ×2 LY1VR · Lithuania ×2 LZ1ZF · Bulgaria ×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 IU5VLR

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: JN53 · 1,599 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-09-12 22:40 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	IU5VLR S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 22:50	40m	- / -17	RN3DD	+3 / -	3	✓ Closing fragment
09-12 22:41	40m	- / -9	EA7BD	-14 / -	2	✓ Closing fragment
09-12 22:39	40m	-4 / -	K3UCQ	- / -	2	Partial capture
09-12 22:37	40m	-7 / -	EC4TR	- / -6	3	✓ Closing fragment
09-12 22:35	40m	-8 / -	BD3PPH	- / -	4	Partial capture
09-12 22:32	40m	-8 / -14	R7ZY	+4 / -2	4	✓ Full exchange observed
09-12 22:30	40m	-7 / -	EA1PZV	- / -	2	Partial capture
09-12 22:25	40m	-11 / -	R6DZJ	- / -	3	Partial capture
09-12 22:21	40m	-3 / -10	F4DVP	-9 / -7	7	✓ Full exchange observed
09-12 22:20	40m	-2 / -	R6DZJ	- / -	3	Partial capture
09-12 22:15	40m	-2 / -	M0OPK	- / -8	3	Partial capture
09-12 22:13	40m	-6 / -	MM0DHQ	- / -	2	Partial capture
09-12 21:59	40m	- / -15	DL2BS	-2 / -	2	✓ Closing fragment
09-12 21:53	40m	-11 / -15	G4FHL	+2 / -12	4	Partial capture
09-12 21:44	40m	-11 / -	MW7HZQ	- / -	2	Partial capture
09-12 21:43	40m	-12 / -	SQ8AA	- / -	2	Partial capture
09-12 21:36	40m	-6 / -	EA2AA	- / -	2	Partial capture
09-12 21:35	40m	-5 / -	EW2ZC	- / -16	2	Partial capture
09-12 21:23	40m	-8 / -9	DL1KMD	-6 / -	3	✓ Closing observed
09-12 21:15	40m	-8 / -	SP5HQZ	- / -	2	✓ Closing fragment
09-12 21:13	40m	-8 / -19	MW6YPO	-10 / -18	6	Partial capture
09-12 21:12	40m	-8 / -	GM3CQD	- / -12	2	✓ Closing fragment
09-12 21:08	40m	-9 / -	F4NPC	- / -3	3	✓ Closing fragment
09-12 21:07	40m	-8 / -	SM0IJS	- / -	4	Partial capture
09-12 20:45	40m	- / -12	YO4NF	-1 / -	3	Partial capture
09-12 20:44	40m	-5 / -6	DL6MRM	0 / -	3	✓ Closing observed
09-12 20:39	40m	-15 / -	DK5NC	-8 / -	2	✓ Closing observed
09-12 20:29	40m	-9 / -	EW2ZC	- / -8	4	Partial capture
09-12 20:25	40m	-16 / -	R2FDP	- / -7	2	✓ Closing fragment
09-12 20:23	40m	-3 / -	DL2VEL	- / -	2	Partial capture
09-12 20:20	40m	-12 / -	DK5NC	- / -	2	Partial capture
09-12 20:13	40m	-12 / -5	OZ1AXG	+23 / -2	5	✓ Full exchange observed
09-12 20:12	40m	- / -8	US5ZCO	-1 / -	3	Partial capture
09-12 20:00	40m	-10 / -10	SV1DZB	-8 / -	4	✓ Closing observed
09-12 19:58	40m	-8 / -	R3NCG	-5 / -13	3	✓ Closing observed
09-12 19:47	40m	-8 / -	G0WTZ	- / -	3	Partial capture
09-12 19:44	40m	-12 / -9	OZ1AXG	+17 / -	5	Partial capture
09-12 19:42	40m	-10 / -	SP2AJO	- / -	2	Partial capture
09-12 19:36	40m	- / -20	RA6FC	-7 / -	2	✓ Closing fragment
09-12 19:34	40m	-9 / -	GB1HTC	- / -10	3	Partial capture
09-12 19:22	40m	-7 / -8	YO3EGE	-1 / -	8	✓ Closing observed
09-12 19:17	40m	-14 / -4	SQ2BXI	-16 / -5	4	✓ Full exchange observed
09-12 19:04	40m	-5 / -13	R4CHN	-11 / -20	4	Partial capture
09-12 19:01	40m	- / -10	R1NBG	-8 / -	2	✓ Closing fragment
09-12 18:48	40m	-10 / -8	OK1JPO	+4 / -4	3	✓ Full exchange observed
09-12 18:37	40m	- / -22	EW2ZC	-1 / -	3	Partial capture
09-12 18:21	40m	- / -12	YO9ADN	-5 / -	3	Partial capture
09-12 18:15	40m	- / -10	SP9NR	-4 / -	2	Partial capture
09-12 18:06	40m	-8 / -18	DL1NB	-13 / -10	4	✓ Full exchange observed
09-12 17:45	40m	-4 / -	R4CHN	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
223600  -7 1535  BD3PPH IU5VLR JN53 (x3)
223730 -11 1535  EC4TR IU5VLR JN53 (x3)
223930  -2 1535  K3UCQ IU5VLR JN53 (x2)
224145 -15 1843  IU5VLR EA7BD -09 (x2)
225045  +0  641  IU5VLR RN3DD -17 (x3)
232845 -11 2787  IU5VLR OH6EPM RR73
233215 -21 2142  IU5VLR TI8MCC RR73

80m

UTC    dB Audio  Message
185700 -10 1096  IU5VLR OK1ALF +00 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee