KO3ZDE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States

Receiver-side FT8 activity involving KO3ZDE, decoded by SO8OO in southeastern Poland. 507 related FT8 messages, 31 CQ messages, observed on 80m, 60m, 40m, 20m, across 31 UTC dates. Heard between 2026-05-24 and 2026-08-22.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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

Overview

507

Related messages

CQ messages

UTC dates heard

-8 dB

Mean decoder S/N

Bands

80m 20m 40m 60m

First seen: 2026-05-24
Last seen: 2026-08-22 05:04 UTC

Frequent QSO partners observed at SO8OO

Stations KO3ZDE worked most often, as logged from our receiver:

DL8WEM · Fed. Rep. of Germany YO4NT · Romania M9OOS · England KA5CRL · United States EB1LA · Spain UT5ECZ · Ukraine LX1TI · Luxembourg IZ7GIT · Italy GB6DD · England EA3RR · Spain ON6AA · Belgium PA1PXL · Netherlands

Activity Heatmap

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	KO3ZDE S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-22 07:03	20m	- / -	ES2AJ	-11 / -	2	✓ Closing fragment
08-22 06:50	20m	- / -16	R2BDR	-14 / -	2	✓ Closing fragment
08-22 06:43	20m	- / -14	R2SN	0 / -	2	✓ Closing fragment
08-22 06:42	20m	- / -12	HB9CNU	+6 / -	2	✓ Closing fragment
08-22 06:36	20m	- / -7	DL9FA	+2 / -	3	✓ Closing fragment
08-21 04:14	20m	- / -	UA3ZMQ	-12 / -	2	Partial capture
08-19 04:24	40m	- / -	IU0NAD	-5 / -	4	Partial capture
08-17 05:55	20m	- / -	DL7RAY	-6 / -	5	Partial capture
08-17 05:49	20m	- / -5	PC2J	-20 / -	2	Partial capture
08-13 04:44	60m	- / -	SP9IZV	-15 / -	4	Partial capture
08-13 04:41	60m	- / -	F4FPR	-19 / -	3	Partial capture
08-13 04:41	60m	- / -12	SP0DF	+2 / -	3	✓ Closing fragment
08-13 04:41	60m	- / -	SV2HTI	-2 / -	5	Partial capture
08-13 04:40	60m	- / -3	DG0OBU	+8 / -	2	Partial capture
08-11 06:19	20m	- / -8	IU1CYA	-8 / -	2	Partial capture
08-11 06:14	20m	- / -	G3TMG	-10 / -	3	Partial capture
08-11 06:13	20m	- / -	PD1RO	-21 / -	3	Partial capture
08-11 06:11	20m	- / -17	R2BQM	-10 / -	4	Partial capture
08-11 04:36	80m	- / -24	DL6II	-3 / -	5	Partial capture
08-11 04:27	80m	- / -11	F8TRT	-19 / -	5	✓ Closing fragment
08-07 04:56	60m	- / -13	II3DRC	+4 / -	6	✓ Closing fragment
08-04 02:55	80m	-14 / -7	TJ1GD/P	-7 / -24	8	✓ Full exchange observed
08-04 02:48	80m	-15 / -4	TJ1GD/P	-13 / -24	10	✓ Full exchange observed
08-04 02:34	60m	- / 0	IZ2DVI	+8 / -	2	Partial capture
08-04 02:31	60m	-20 / -7	F5MYK	-11 / -	4	✓ Closing observed
08-04 02:27	60m	-18 / -8	TA1BM	-4 / -10	4	✓ Full exchange observed
07-25 06:27	20m	-18 / -	Z62NS	-9 / -	7	✓ Closing observed
07-25 06:23	20m	-23 / -	Z62NS	- / -	2	Partial capture
07-22 05:44	20m	- / -5	DL3HBF	0 / -	2	Partial capture
07-22 05:42	20m	- / -19	UT4VL	-9 / -	4	Partial capture
07-22 05:39	20m	- / -	DB7GE	-10 / -	9	Partial capture
07-22 05:32	20m	-15 / -21	IK4RVY	-9 / -16	11	✓ Full exchange observed
07-22 05:29	20m	- / +6	DL3MML	-13 / -	4	✓ Closing fragment
07-21 05:42	40m	- / +7	SP1ZMO	-20 / -	4	Partial capture
07-21 05:22	40m	- / -18	YO4NT	-13 / -	2	Partial capture
07-21 05:16	40m	- / -12	OE3DXA	+16 / -	3	Partial capture
07-20 04:42	20m	- / -13	UA3PHB	-12 / -	6	✓ Closing fragment
07-20 04:36	20m	-16 / -13	RC6OX	-7 / -3	7	✓ Full exchange observed
07-20 04:31	20m	- / -17	R2BQM	-16 / -	3	Partial capture
07-20 04:31	20m	- / -12	R2PM	-7 / -	6	✓ Closing fragment
07-18 06:14	20m	- / -	R2AL	-5 / -	3	Partial capture
07-18 05:57	20m	- / -13	UT7UJ	+5 / -	2	✓ Closing fragment
07-07 04:47	20m	- / -15	DL1NCH	-11 / -	7	Partial capture
07-06 06:32	20m	- / -9	DL5AX	-13 / -	2	Partial capture
07-06 06:24	20m	- / -7	ON4CBK	-12 / -	2	Partial capture
07-06 05:40	20m	- / -10	YO4NT	-4 / -	4	✓ Closing fragment
07-06 05:37	20m	- / -14	R7DX	-8 / -	6	✓ Closing fragment
07-06 05:35	20m	- / -9	LZ3CB	+5 / -	2	✓ Closing fragment
06-30 07:44	20m	- / -	F1SZC	-12 / -	9	✓ Closing fragment
06-30 07:42	20m	- / -	PA1RMY	-9 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
041530 -14 1370  KO3ZDE SV5AZK -11
063645  -1 2749  KO3ZDE DL9FA JO53 (x3)
063915  +2 2382  KO3ZDE F4VTR JN25
064215  +7 2383  KO3ZDE HB9CNU R-12
064215  +7  726  KO3ZDE F4GGJ JN13
064245  +6 2383  KO3ZDE HB9CNU 73
064315  +0 2382  KO3ZDE R2SN -14 (x2)
065030 -12  735  KO3ZDE R2BDR -16 (x2)
065230  +1 2560  KO3ZDE DL7UHD JO62
070345 -13 1270  KO3ZDE ES2AJ RR73 (x2)

40m

UTC    dB Audio  Message
051645 -14 2436  KO3ZDE F4IDT R-04
051645 +15 2989  KO3ZDE OE3DXA -12 (x3)
052215 -14 2080  KO3ZDE YO4NT -18 (x2)
054245 -24 1539  KO3ZDE SP1ZMO JO73 (x3)
054345  +5 2447  KO3ZDE SP6FME JO90
054445 -18 1539  KO3ZDE SP1ZMO R+07
042415  -9  859  KO3ZDE IU0NAD JN62 (x4)

60m

UTC    dB Audio  Message
044145 -16 2193  KO3ZDE F4FPR IN88
044145  +0 1173  KO3ZDE SV2HTI KN10
044145  +0 1531  KO3ZDE SP0DF JO73
044215  -1 1173  KO3ZDE SV2HTI KN10
044215  +4 1531  KO3ZDE SP0DF R-12
044245  -5 1173  KO3ZDE SV2HTI KN10
044245  +3 1531  KO3ZDE SP0DF 73
044315  -1 1173  KO3ZDE SV2HTI KN10
044345 -21 2193  KO3ZDE F4FPR IN88
044345  -1 1173  KO3ZDE SV2HTI KN10
044445 -16 1474  KO3ZDE SP9IZV KN09 (x2)
044545 -21 2193  KO3ZDE F4FPR IN88
044545 -17 1474  KO3ZDE SP9IZV KN09 (x2)

80m

UTC    dB Audio  Message
025630 -10  487  KO3ZDE TJ1GD/P -07 (x2)
025715  -8 1304  TJ1GD/P KO3ZDE R-22
025730  -9  427  KO3ZDE TJ1GD/P RR73
025745 -14 1304  TJ1GD/P KO3ZDE 73
042700 -22 1908  KO3ZDE F8TRT JN33 (x5)
043600  +0 1774  KO3ZDE DL6II JO31 (x5)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.