OK1ZCF — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JO80

Receiver-side FT8 activity involving OK1ZCF, decoded by SO8OO in southeastern Poland. 772 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-10-25.

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 772 FT8 messages attributed to OK1ZCF as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 80 m (33%) and 20 m (17%). Several six-hour UTC windows tied for the largest share (76%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -1.7 dB.

Overview

772

Messages attributed

UTC dates decoded

Active 15-min windows

-1.7 dB

Estimated median S/N

Bands

160m · 16 80m · 251 40m · 376 20m · 129

First attributed message: 2026-06-09
Last attributed message: 2026-10-25 03:04 UTC

Observed FT8 message patterns

Attributed sample: 772 messages
Active dates: 39 UTC dates
Estimated median S/N: -1.7 dB
Estimated 10th-90th percentile: -16 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 85, moderate (-15 to -9 dB) 150, strong (≥ -8 dB) 537.

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 OK1ZCF in decoded directed-looking exchanges:

NT4K · United States ×2 K1SFA · United States ×2 9A5AFP · Croatia W6NWS · United States 2E0SHD · England 5Z4VJ · Kenya BD8SN · China EP2AES · Iran F1GUQ · France GJ0KYZ · Jersey KB9DAK · United States KK1X · United States

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 OK1ZCF

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: JO80 · 589 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 347 km (approx.)
Last such locator decoded: 2026-10-25 03:04 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	OK1ZCF S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 04:03	40m	- / -	F3CJ	-11 / -	4	Partial capture
11-05 04:02	40m	- / -15	ES2AJ	-18 / -	2	Partial capture
11-04 03:26	40m	- / -	IU2THY	+12 / -	3	Partial capture
11-04 03:25	40m	- / -	PD7BDN	-16 / -	5	Partial capture
11-04 03:25	40m	- / -10	R8QA	-12 / -	2	Partial capture
11-04 03:15	40m	- / -	G3TKT	-16 / -	4	Partial capture
11-04 03:13	40m	- / -19	R8QA	-6 / -	2	Partial capture
11-02 03:44	40m	- / -	GI6KDN	-19 / -	3	Partial capture
10-30 03:33	40m	- / -	F4BYA	+12 / -	3	Partial capture
10-30 03:30	40m	- / -	F1IQH	-12 / -	4	Partial capture
10-28 03:43	40m	- / -	SV5BYP	-3 / -	8	Partial capture
10-28 03:40	40m	- / -	SV5BYP	-6 / -	2	Partial capture
10-28 03:37	40m	- / -3	ON1JP	-19 / -	2	Partial capture
10-28 03:17	40m	- / -14	R8QA	-19 / -	2	Partial capture
10-27 03:34	40m	- / -	UA9SY	-16 / -	2	Partial capture
10-27 03:29	40m	- / -	CT1BFP	-19 / -	7	Partial capture
10-25 03:44	40m	- / -21	W8FIB	-15 / -	3	Partial capture
10-25 03:44	40m	- / -	EA5JUX	-22 / -	2	Partial capture
10-25 03:25	40m	- / -	ON1JP	-23 / -	2	Partial capture
10-25 03:23	40m	- / -	EA5JUX	-17 / -	4	Partial capture
10-24 03:02	40m	- / -	UA9SY	-9 / -	5	Partial capture
10-24 02:36	40m	- / +3	ON1JP	-11 / -	3	Partial capture
10-24 02:24	40m	- / -20	PT7YB	-14 / -	4	✓ Closing fragment
10-24 02:22	40m	- / -	CT2HEX	-21 / -	3	Partial capture
10-24 02:18	40m	- / -	CT2HEX	-23 / -	2	Partial capture
10-22 03:42	40m	-16 / -	TO4A	- / +1	9	Partial capture
10-22 03:41	40m	-16 / -	EP2AES	- / -8	2	✓ Closing fragment
10-21 03:21	40m	- / -	EA1AGM	-14 / -	4	Partial capture
10-21 03:08	40m	- / -	IU8RFW	-7 / -	6	Partial capture
10-18 02:46	40m	- / -7	2E0SHD	-19 / -	5	✓ Closing fragment
10-18 02:34	40m	- / -	R7LC	-6 / -	2	Partial capture
10-18 02:26	40m	- / -3	R4ML	-8 / -	2	Partial capture
10-16 19:54	40m	- / -	F4BYA	+3 / -	4	Partial capture
10-16 19:49	40m	- / -10	F1GUQ	-8 / -	2	✓ Closing fragment
10-16 19:48	40m	- / -	IU8RFW	+3 / -	6	Partial capture
10-16 19:46	40m	- / -	F4BYA	+2 / -	3	Partial capture
10-16 19:44	40m	- / -	F6CCS	-7 / -	2	Partial capture
10-13 03:40	40m	- / -	SV5BYP	-6 / -	5	Partial capture
10-13 03:35	40m	- / -	SV5BYP	-13 / -	5	Partial capture
10-13 03:13	40m	- / -	EA5HM	-6 / -	11	Partial capture
10-10 03:56	40m	- / -	F4GUC	-20 / -	3	Partial capture
10-10 03:52	40m	- / -	F4GUC	-21 / -	3	Partial capture
10-10 03:47	40m	- / -	IU8RFW	-9 / -	4	Partial capture
09-29 03:33	40m	- / -	F4BYA	+7 / -	3	Partial capture
09-29 03:14	40m	- / -	EA5JXP	-6 / -	2	Partial capture
09-29 03:09	40m	- / -16	5Z4VJ	-12 / -	4	✓ Closing fragment
09-28 03:32	40m	- / -	F4BYA	0 / -	6	Partial capture
09-28 03:28	40m	- / -	F4BYA	-1 / -	3	Partial capture
09-28 03:08	40m	- / -	IU8RFW	-7 / -	5	Partial capture
09-25 01:56	80m	+4 / -	VE2DFY	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
032545 -12 2325  OK1ZCF R8QA -10
032615 -15 1787  OK1ZCF PD7BDN JO22 (x2)
032645 +13 2751  OK1ZCF IU2THY JN45
032715 -12 1786  OK1ZCF PD7BDN JO22
032715 +14 2751  OK1ZCF IU2THY JN45
032745 -16 1787  OK1ZCF PD7BDN JO22
032745 +10 2751  OK1ZCF IU2THY JN45
040200 -15 1914  OK1ZCF ES2AJ KO29 (x2)
040300 -18  232  OK1ZCF F3CJ JO10 (x4)
040430  -8 2732  OK1ZCF F4BYA JN19

80m

UTC    dB Audio  Message
015215 +11 1868  CQ DX OK1ZCF JO80
015230 -15 1432  OK1ZCF ON4MAP JO20
015245  +5 1869  CQ DX OK1ZCF JO80
015300 -15 1432  OK1ZCF ON4MAP JO20
015315  +9 1868  CQ DX OK1ZCF JO80
015330  -9 1432  OK1ZCF ON4MAP JO20
015345  +9 1868  CQ DX OK1ZCF JO80
015400 -11 1432  OK1ZCF ON4MAP JO20
015415  +2 1868  CQ DX OK1ZCF JO80
015430  -9 1432  OK1ZCF ON4MAP JO20
015445  +7 1868  CQ DX OK1ZCF JO80 (x2)
015600  -1 1868  VE2DFY OK1ZCF JO80 (x3)

160m

UTC    dB Audio  Message
174430 -12 1697  CQ OK1ZCF JO80 (x3)
174715 -14 1697  SO100PKP OK1ZCF JO80
174730  +7 1526  OK1ZCF LZ936BA -17
174745 -11 1697  SO100PKP OK1ZCF R-16
174800 +10 1526  OK1ZCF LZ936BA -17
174815  -9 1697  SO100PKP OK1ZCF R-08 (x2)
175000 -12 1696  9A5AFP OK1ZCF JO80
175015  -1 1621  OK1ZCF 9A5AFP -14
175030  -9 1697  9A5AFP OK1ZCF R-03
175045  -2 1621  OK1ZCF 9A5AFP RRR
175100 -13 1696  9A5AFP OK1ZCF 73
175115  -4 1621  OK1ZCF 9A5AFP 73

20m

UTC    dB Audio  Message
033400  -6 1621  OK1ZCF W6NWS -20 (x2)
033630 -10 1621  OK1ZCF DK4HM JN58
034300 -12 2658  OK1ZCF DL1R JN58 (x7)
172730 -18 1485  OK1ZCF M9SDD IO83 (x3)
172945  +5 1816  OK1ZCF TA1MB KN41
173045 -16 1564  OK1ZCF DB1EF JO41

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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