C31CT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Andorra Most frequent locator attributed to this token: JN02

Receiver-side FT8 activity involving C31CT, decoded by SO8OO in southeastern Poland. 754 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 19 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-10-03.

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 754 FT8 messages attributed to C31CT as the transmitting token by decoded message structure across 19 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (43%), followed by 40 m (18%) and 10 m (13%). Most decodes (100%) 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 -10.9 dB.

Overview

754

Messages attributed

UTC dates decoded

Active 15-min windows

-10.9 dB

Estimated median S/N

Bands

160m · 91 80m · 58 60m · 325 40m · 134 20m · 50 10m · 96

First attributed message: 2026-06-09
Last attributed message: 2026-10-03 23:26 UTC

Observed FT8 message patterns

Attributed sample: 754 messages
Active dates: 19 UTC dates
Estimated median S/N: -10.9 dB
Estimated 10th-90th percentile: -18 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 166, moderate (-15 to -9 dB) 337, strong (≥ -8 dB) 251.

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 C31CT in decoded directed-looking exchanges:

9K2ET · Kuwait ×2 DK8ZT · Fed. Rep. of Germany ×2 DL9KM · Fed. Rep. of Germany ×2 EC1A · Spain ×2 IU2SLB · Italy ×2 RD7O · European Russia ×2 OH1ZE · Finland ×2 F1PBZ · France ×2 LY1DY · Lithuania ×2 OM3PC · Slovak Republic ×2 ON4ASV · Belgium ×2 G0ORC · England ×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 C31CT

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: JN02 · 110 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,792 km (approx.)
Last such locator decoded: 2026-10-03 22:49 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	C31CT S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-03 23:22	40m	-4 / -	W5GFM	- / -11	4	✓ Closing fragment
10-03 23:20	40m	-2 / -14	K3WC	-7 / -3	8	✓ Full exchange observed
10-03 23:19	40m	-3 / -4	KA3MAJ	-17 / -4	4	✓ Full exchange observed
10-03 23:18	40m	-2 / -	K3ZIB	- / -13	3	✓ Closing fragment
10-03 23:15	40m	-2 / -	KQ4WUH	- / -14	2	Partial capture
10-03 23:13	40m	-7 / -	RA9MX	-20 / -	2	✓ Closing observed
10-03 23:09	40m	-5 / -	N1IXE	- / -13	5	✓ Closing fragment
10-03 23:09	40m	-2 / -	HF1Z	- / -5	2	✓ Closing fragment
10-03 23:08	40m	-7 / -	NV1U	- / -	2	✓ Closing fragment
10-03 23:07	40m	- / -7	KA3MAJ	-18 / -	2	Partial capture
10-03 23:07	40m	- / -	TA3GO	+12 / -	2	Partial capture
10-03 23:04	40m	-7 / 0	AF2D	-24 / -	2	✓ Closing observed
10-03 23:03	40m	-4 / -12	YB5QZ	-11 / -13	12	✓ Full exchange observed
10-03 23:02	40m	-6 / +1	MM7FTH	-10 / -12	6	✓ Full exchange observed
10-03 23:02	40m	-2 / -	N8LE	-23 / -10	3	✓ Closing observed
10-03 22:57	40m	-2 / -	UT0IN	- / -14	2	✓ Closing fragment
10-03 22:54	40m	-3 / -	KF4JHG	- / -14	2	✓ Closing fragment
10-03 22:52	40m	-7 / -	RN6HK	+5 / -10	5	Partial capture
10-03 22:50	40m	-8 / -9	YO4FZV	-3 / -12	5	✓ Full exchange observed
10-03 22:50	40m	-8 / -	LA6AFA	- / -2	2	✓ Closing fragment
10-03 22:50	40m	- / -	F1UJS	-8 / -	2	Partial capture
10-03 22:49	40m	-2 / +2	GM0EZP	-15 / -11	5	✓ Full exchange observed
10-03 22:49	40m	- / -	IS0KNY	-2 / -	6	Partial capture
10-03 22:47	40m	-8 / +1	K1QD	-9 / -	4	✓ Closing observed
10-03 22:46	40m	-10 / -	WA2MBP	- / 0	3	Partial capture
10-03 22:41	40m	- / -	WA2MBP	-10 / -	4	Partial capture
10-03 22:39	40m	0 / -	NP4PR	- / -12	2	✓ Closing fragment
10-03 22:38	40m	- / -	IS0KNY	-3 / -	6	Partial capture
10-03 22:37	40m	-2 / -	KY2J	- / -12	2	Partial capture
10-03 22:36	40m	-5 / -	W3EWL	- / -11	2	✓ Closing fragment
10-03 22:36	40m	-2 / -6	V47YA	-1 / -7	9	✓ Full exchange observed
10-03 22:35	40m	0 / -	KR4SO	- / -9	2	✓ Closing fragment
10-03 22:34	40m	-5 / -	N0EUV	- / -16	3	✓ Closing fragment
10-03 22:32	40m	0 / -3	MM0DXL	-11 / -3	5	✓ Full exchange observed
10-03 22:32	40m	- / -	YO4FZV	-7 / -	3	Partial capture
10-03 22:32	40m	- / -	IU4WSH	-6 / -	11	Partial capture
10-03 22:32	40m	-6 / -	WB4KTF	- / -9	2	✓ Closing fragment
10-03 20:52	40m	- / -16	UR4LJ	-10 / -	2	Partial capture
10-03 20:50	40m	- / -	DL1ESZ	-2 / -	2	Partial capture
10-03 20:47	40m	-16 / -	DL1YKQ	- / -16	2	✓ Closing fragment
10-03 20:47	40m	- / -15	R3SN	-15 / -	5	✓ Closing fragment
10-03 20:46	40m	-14 / -	YO2MKE	- / -11	2	✓ Closing fragment
10-03 20:45	40m	-15 / -	OZ2LC	- / -12	2	✓ Closing fragment
10-03 20:44	40m	-18 / -	LY2PAD	- / -6	2	✓ Closing fragment
10-03 20:42	40m	-18 / -	ON8HW	- / -15	2	✓ Closing fragment
10-03 20:41	40m	-16 / +1	EA1KCU	-6 / -	5	✓ Closing observed
10-03 20:40	40m	- / -	R3SN	-12 / -	6	Partial capture
10-03 20:39	40m	- / -8	RW3ZC	+1 / -	4	Partial capture
10-03 20:37	40m	-20 / -1	DL9AN	-14 / -10	3	✓ Full exchange observed
10-03 20:36	40m	-21 / -	EA8BS	-12 / -15	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
232000 -17 2028  C31CT KA3MAJ RR73
232000  -8 1500  C31CT K3WC FN10
232015  -1 2029  KA3MAJ C31CT 73
232030  -7 1500  C31CT K3WC FN10
232045  -3 2029  K3WC C31CT -03
232100  -6 1500  C31CT K3WC FN10
232115  -1 2029  K3WC C31CT -07
232130  -5 1500  C31CT K3WC R-14 (x2)
232215  -7 2029  W5GFM C31CT -11
232230  -7 1500  C31CT K3WC 73
232245  -4 2029  W5GFM C31CT -11 (x3)
232615  -7 2029  AD0CH C31CT -19

80m

UTC    dB Audio  Message
201715  +0 1834  C31CT DL8NW JO30
201730 -14 1886  DL8NW C31CT -11
201745  +3 1833  C31CT DL8NW R-03
201800 -12 1886  DL8NW C31CT RR73
201815 +12 2450  C31CT UT7UA KO50
201815  -6  439  C31CT LA6MNA JP65
201845  +9 2450  C31CT UT7UA KO50
201845  -3 1887  C31CT OE2GRN R-06
201845  -5  445  C31CT LA6MNA JP65
201915  +6 2450  C31CT UT7UA KO50
201915  -7 1887  C31CT OE2GRN 73
201945  -6 1411  C31CT OH2BGD KP20
202015  +7  443  C31CT UT7UA KO50 (x2)
202145 -17 2570  C31CT DO5AX JO52

160m

UTC    dB Audio  Message
204530  +2 1333  C31CT SP6LUY JO80 (x3)
201515 -16 2062  C31CT IV3GHY JN65 (x4)
201645  -9 2752  C31CT IK3VUU JN55
201715 -17 2063  C31CT IV3GHY 73
201815 -20 1090  C31CT RU3FM KO94
201815 -10 2751  C31CT IK3VUU 73
202245  -5 2808  C31CT OH6JD KP13 (x4)

60m

UTC    dB Audio  Message
203600 -11 2099  CQ C31CT JN02
203615  -9  732  C31CT DF0CT JO43
203800 -18 2099  IK7TOE C31CT 73
203830 -11 2099  CQ C31CT JN02 (x3)
203945  +5 2029  C31CT DL3RL JN59 (x2)
204030 -11 2099  DL3RL C31CT +03
204045  +6 2029  C31CT DL3RL R+11
204100 -11 2099  DL3RL C31CT RR73
204115  +6 2029  C31CT DL3RL 73
204130  -5 2099  IU4TQQ C31CT R-12
204145 -11 2312  C31CT SQ8AA KN19
204200  -4 2099  IU4TQQ C31CT R-12

20m

UTC    dB Audio  Message
212215 -13 2051  C31CT IU0UAF JN52
212230 -11 2050  JA3ADW C31CT RR73
212245 -13 3039  C31CT JA8EPO QN23
212245 -16 2051  C31CT IU0UAF JN52
212300 -15 2051  W1WCI C31CT -07
212315 -14 1879  C31CT BA3QIQ OM99
212330 -15 2051  W1WCI C31CT RR73
212345 -10  804  C31CT KC1MMC FN34
212415 -10 3039  C31CT JA8EPO QN23
212445 -18 2051  C31CT IU0UAF JN52
212445 -16 2317  C31CT DL3NA R+01
212515  -9 3039  C31CT JA8EPO QN23
212515 -14 2051  C31CT IU0UAF JN52
212545 -10 3039  C31CT JA8EPO QN23
213315 -16 2051  C31CT IU0UAF JN52

10m

UTC    dB Audio  Message
182230 -13 2219  DO1LKG C31CT -12 (x3)
182830 -21 2194  TI2CC C31CT JN02 (x4)
183100 -18 2233  E75T C31CT RR73
183130 -14 2233  HI3A C31CT -07 (x2)
183300 -15 2233  SQ8GUM C31CT RR73
183400 -17 2233  9K2ET C31CT RR73
183430 -19 2233  EA1KP C31CT -05
123845 -24 2126  C31CT RY6O KN87 (x2)

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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