IW4APB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN45

Receiver-side FT8 activity involving IW4APB, decoded by SO8OO in southeastern Poland. 156 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-13.

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 156 FT8 messages attributed to IW4APB as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (62%), followed by 20 m (16%) and 60 m (14%). Several six-hour UTC windows tied for the largest share (84%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

156

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 97 60m · 22 40m · 12 20m · 25

First attributed message: 2026-06-10
Last attributed message: 2026-09-13 03:02 UTC

Observed FT8 message patterns

Attributed sample: 156 messages
Active dates: 11 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -18 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 27, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 80.

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 IW4APB in decoded directed-looking exchanges:

OR7K · Belgium CE2SV · Chile DL1YAU · Fed. Rep. of Germany F5SZB · France R3ICU · European Russia RK0SK · Asiatic Russia RU5X · European Russia TK5NJ · Corsica F4DIA · France HA0AA · Hungary HA7CH · Hungary II3DRC · Italy

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 IW4APB

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: JN45 · 77 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,075 km (approx.)
Last such locator decoded: 2026-09-13 03:02 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	IW4APB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 02:57	80m	-6 / 0	II0CDS	-18 / +5	4	✓ Full exchange observed
09-10 01:22	80m	-8 / -	SQ100PKP	- / +1	2	Partial capture
09-10 01:15	80m	-20 / -	UN7LAN	- / -	3	Partial capture
09-10 01:10	80m	-15 / -7	M0LOW	-14 / -17	7	✓ Full exchange observed
09-10 01:07	80m	-14 / -2	UR7FM	0 / -5	6	✓ Full exchange observed
09-10 01:01	80m	-9 / -	SV4FFK	-13 / -12	4	✓ Closing observed
09-10 00:55	160m	- / -12	OR7K	-6 / -	2	✓ Closing fragment
09-07 00:19	80m	0 / -14	RN3YN	-4 / -	10	Partial capture
09-07 00:18	80m	0 / -	RW3DKK	- / -	2	Partial capture
09-07 00:15	80m	+3 / -	RN3YN	- / -	2	Partial capture
09-07 00:12	80m	-2 / -	K5VRX	- / -	3	Partial capture
09-07 00:05	80m	-10 / -2	OK1SI	+7 / -6	5	✓ Full exchange observed
09-07 00:03	80m	-18 / -	R9CS/P	- / -3	2	Partial capture
08-27 03:12	80m	-7 / +4	YO3OBB	-9 / -	3	✓ Closing observed
08-27 03:10	80m	-17 / -	AC8RJ	- / -	2	Partial capture
08-27 03:04	80m	-11 / -	KB1EFS	- / -	3	Partial capture
08-27 03:01	80m	-7 / -	SM4AZQ	- / -	2	Partial capture
08-27 02:57	80m	-8 / +1	ER3ZW	+6 / +8	4	✓ Full exchange observed
08-27 02:47	80m	+2 / -	PA3EY	-7 / -1	5	✓ Full exchange observed
08-27 02:41	80m	-18 / -	N1DE	- / -	2	Partial capture
08-27 02:37	80m	-4 / +5	UR4SXA	+14 / +9	6	✓ Full exchange observed
08-01 14:20	40m	- / -4	HA7CH	-6 / -	2	✓ Closing fragment
07-26 12:08	20m	-4 / -	RU5X	-20 / +4	4	✓ Closing observed
07-26 12:03	20m	-12 / -	R4FDW	- / -	3	Partial capture
07-26 11:59	20m	-6 / -	R3ICU	- / +3	2	✓ Closing fragment
07-13 09:16	20m	-9 / -	F5SZB	- / -5	4	✓ Closing fragment
07-13 09:15	20m	-14 / -	RK0SK	- / -2	2	✓ Closing fragment
07-13 09:02	20m	-18 / -2	DL1YAU	-24 / -	2	✓ Closing observed
07-13 08:59	20m	-19 / -	TK5NJ	- / -	4	✓ Closing fragment
07-08 16:27	20m	-6 / -	F4DIH	- / -10	4	Partial capture
07-08 16:24	20m	-16 / -	GM3AND	- / -7	2	Partial capture
07-05 01:36	20m	- / -11	CE2SV	-8 / -	2	✓ Closing fragment
07-03 02:28	60m	-12 / -3	DL9KM	-6 / -11	5	✓ Full exchange observed
07-03 02:26	60m	-13 / -	WM3PEN	- / -10	4	✓ Closing fragment
07-03 02:15	60m	-14 / -	WM3PEN	- / -11	2	Partial capture
07-03 02:11	60m	-11 / -	WM3PEN	- / -11	4	Partial capture
07-03 02:03	60m	-17 / -3	ER3UA	-4 / -	3	✓ Closing observed
07-03 01:58	80m	+1 / -	AC8RJ	- / -	3	Partial capture
07-03 01:56	80m	0 / +1	SN4WWA	+10 / +5	5	✓ Full exchange observed
07-03 01:51	80m	+4 / -	AC8RJ	- / -	3	Partial capture
07-03 01:48	80m	+1 / -4	G0OYQ	+8 / +7	4	✓ Full exchange observed
07-03 01:44	80m	0 / +3	LY7Z	+15 / +4	4	✓ Full exchange observed
07-03 01:42	80m	+1 / -12	SN0WWA	-2 / -9	5	✓ Full exchange observed
06-30 03:01	80m	-4 / -6	DL7UFN	+7 / +2	5	✓ Full exchange observed
06-30 02:59	80m	-6 / -2	TM2WWA	-6 / +3	3	✓ Full exchange observed
06-30 02:55	80m	-5 / -14	SP9OJ	+8 / -22	6	✓ Full exchange observed
06-30 02:55	80m	-8 / -4	TM2WWA	-3 / +5	3	Partial capture
06-30 02:52	80m	-5 / +6	DO1ID	+3 / +10	6	✓ Full exchange observed
06-29 04:06	40m	- / +3	F4DIA	-12 / -	2	✓ Closing fragment
06-29 04:04	40m	- / +2	IW4DV	-4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
011145 -13  400  IW4APB M0LOW -07
011200 -15 1203  M0LOW IW4APB R-17 (x3)
011500 -23 1203  UN7LAN IW4APB JN45 (x3)
012215  -9 1203  SQ100PKP IW4APB JN45
012230  +6  723  IW4APB OL900LTV -03
012245  -7 1203  SQ100PKP IW4APB R+01
025715  -8 1210  II0CDS IW4APB JN45
025730 -17  926  IW4APB II0CDS +00
025745  -5 1210  II0CDS IW4APB R+05
025800 -18  926  IW4APB II0CDS RR73
030215  -9 1199  EA6LU IW4APB JN45

160m

UTC    dB Audio  Message
005530  -2 1995  IW4APB OR7K -12 (x2)

40m

UTC    dB Audio  Message
013415 -16 2266  PZ5TW IW4APB R-20
014600 -14 2266  HA0AA IW4APB 73
014730 -14 2076  OA4ENG IW4APB JN45 (x6)
040400  -4 2411  IW4APB IW4DV +02 (x2)
040630 -12 1477  IW4APB F4DIA +03 (x2)
041930  +2  465  IW4APB II3DRC RR73
142030  -7  737  IW4APB HA7CH -04 (x2)

20m

UTC    dB Audio  Message
091545 -14 1836  RK0SK IW4APB R-02 (x2)
091645  -7 1836  F5SZB IW4APB -05 (x4)
115915  -8 1496  R3ICU IW4APB R+03 (x2)
120330 -12 1496  R4FDW IW4APB JN45 (x3)
120830  -6 1256  RU5X IW4APB JN45 (x2)
120915 -20 1816  IW4APB RU5X RR73
120930  -4 1256  RU5X IW4APB 73

60m

UTC    dB Audio  Message
021230  -6 1038  WM3PEN IW4APB -11 (x4)
021915 -11 1936  <...> IW4APB JN45 (x2)
022630 -13 1935  WM3PEN IW4APB JN45 (x4)
022815  -8 1320  IW4APB DL9KM JN68
022830 -13 1935  DL9KM IW4APB -11
022845  -8 1320  IW4APB DL9KM R-03
022900 -10 1249  DL9KM IW4APB RR73
022915  -3 1320  IW4APB DL9KM 73

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