C31CT — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving C31CT, decoded by SO8OO in southeastern Poland. 587 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-19.
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 587 FT8 messages attributed to C31CT as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (55%), followed by 10 m (16%) and 160 m (10%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.6 dB.
Overview
Bands
Last attributed message: 2026-09-19 20:52 UTC
Observed FT8 message patterns
- Attributed sample
- 587 messages
- Active dates
- 15 UTC dates
- Estimated median S/N
- -10.6 dB
- Estimated 10th-90th percentile
- -18 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 113, moderate (-15 to -9 dB) 293, strong (≥ -8 dB) 181.
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:
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 · 87 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,792 km (approx.)
- Last such locator decoded
- 2026-09-19 20:50 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 |
|---|---|---|---|---|---|---|
| 09-19 20:56 | 160m | - / - | RA3ZH | 0 / - | 3 | Partial capture |
| 09-19 20:55 | 160m | - / - | CT2GQA | -19 / - | 2 | ✓ Closing fragment |
| 09-19 20:55 | 160m | - / -16 | DK8ZT | -6 / - | 2 | ✓ Closing fragment |
| 09-19 20:55 | 160m | - / - | SM0CXS | -4 / - | 3 | Partial capture |
| 09-19 20:51 | 160m | - / - | G1XOW | -9 / - | 3 | Partial capture |
| 09-19 20:50 | 160m | - / +5 | DD3KF | -11 / - | 6 | ✓ Closing fragment |
| 09-19 20:50 | 160m | - / -3 | IU2SLB | -6 / - | 8 | ✓ Closing fragment |
| 09-19 20:49 | 160m | - / - | SM0CXS | -11 / - | 8 | Partial capture |
| 09-19 20:48 | 160m | -23 / -6 | OK1JMB | -1 / -19 | 6 | ✓ Full exchange observed |
| 09-19 20:48 | 160m | - / -10 | DO1YFF | -6 / - | 5 | Partial capture |
| 09-19 20:48 | 160m | -18 / - | RD7O | -4 / -15 | 10 | Partial capture |
| 09-19 20:47 | 160m | - / 0 | RW4M | +2 / - | 15 | ✓ Closing fragment |
| 09-19 20:47 | 160m | - / - | SQ9PBV | +2 / - | 4 | Partial capture |
| 09-19 20:41 | 60m | -4 / - | IU4TQQ | - / -12 | 2 | Partial capture |
| 09-19 20:39 | 60m | -11 / - | DL3RL | +4 / +3 | 6 | ✓ Full exchange observed |
| 09-19 20:32 | 60m | -10 / - | IZ2JPN | - / -12 | 4 | ✓ Closing fragment |
| 09-19 20:30 | 60m | -12 / - | F4LML | - / -18 | 2 | Partial capture |
| 09-19 20:27 | 60m | -5 / - | PA1X | - / -12 | 2 | ✓ Closing fragment |
| 09-19 20:26 | 60m | -6 / - | HA5LB | -11 / -15 | 6 | ✓ Closing observed |
| 09-19 20:26 | 60m | - / - | IZ8FBU | 0 / - | 2 | Partial capture |
| 09-19 20:25 | 60m | -4 / - | 9A7V | -2 / +4 | 6 | ✓ Full exchange observed |
| 09-19 20:25 | 60m | -6 / +5 | DL2MIJ | -9 / -2 | 7 | ✓ Full exchange observed |
| 09-19 20:25 | 60m | - / - | SP4MPF | -15 / - | 4 | Partial capture |
| 09-19 20:24 | 60m | -2 / +2 | PI4TX | -4 / -7 | 5 | ✓ Full exchange observed |
| 09-19 20:22 | 60m | 0 / +5 | EU3A | +3 / +2 | 7 | ✓ Full exchange observed |
| 09-19 20:21 | 60m | -2 / - | SM0NJO | -4 / -7 | 6 | ✓ Full exchange observed |
| 09-19 20:20 | 60m | -8 / +8 | DF1BN | -10 / -8 | 6 | ✓ Full exchange observed |
| 09-19 20:19 | 60m | -9 / -9 | LB6LK | -8 / -12 | 4 | ✓ Full exchange observed |
| 09-19 20:18 | 60m | -7 / - | OM4KK | -16 / -12 | 3 | ✓ Closing observed |
| 09-19 20:18 | 60m | -10 / +2 | IV3RCH | +5 / 0 | 4 | ✓ Full exchange observed |
| 09-19 20:17 | 60m | - / - | SP9HAB | -6 / - | 2 | Partial capture |
| 09-19 20:16 | 60m | +1 / - | IU2VWQ | -14 / +4 | 3 | ✓ Closing observed |
| 09-19 20:14 | 60m | -4 / - | 9A7KFF | - / -13 | 2 | ✓ Closing fragment |
| 09-19 20:12 | 60m | -2 / +3 | PA0GSP | -8 / -4 | 7 | ✓ Full exchange observed |
| 09-19 20:11 | 60m | - / - | DC5CH | -12 / - | 2 | Partial capture |
| 09-19 20:11 | 60m | 0 / +4 | F1PBZ | -4 / -4 | 7 | ✓ Full exchange observed |
| 09-19 20:11 | 60m | -8 / +10 | YT5DEY | -14 / -5 | 8 | ✓ Full exchange observed |
| 09-18 20:08 | 60m | - / - | DL1KYF/P | -19 / - | 3 | Partial capture |
| 09-18 20:08 | 60m | - / - | SP9HAB | -9 / - | 2 | Partial capture |
| 09-18 20:06 | 60m | -14 / - | 9A3KG | -16 / -11 | 6 | ✓ Full exchange observed |
| 09-18 20:02 | 60m | -12 / -1 | OZ1FHU | -6 / -7 | 6 | ✓ Full exchange observed |
| 09-18 20:01 | 60m | -12 / +7 | OZ1LXL | -2 / +1 | 5 | ✓ Full exchange observed |
| 09-18 20:00 | 60m | -13 / - | DL9ZAL/QRP | - / -1 | 3 | Partial capture |
| 09-18 19:58 | 60m | -16 / +5 | G4JYU | -7 / -7 | 5 | ✓ Full exchange observed |
| 09-18 19:56 | 60m | -10 / +4 | IU2SLB | -4 / -8 | 6 | ✓ Full exchange observed |
| 09-18 19:55 | 60m | -12 / +2 | IK5ZTT | -11 / -5 | 5 | ✓ Full exchange observed |
| 09-18 19:54 | 60m | - / - | OH6FSO | -6 / - | 11 | Partial capture |
| 09-18 19:53 | 60m | -12 / - | CU3EM | - / -11 | 2 | ✓ Closing fragment |
| 09-18 19:53 | 60m | -11 / 0 | IU6PPX | -7 / -9 | 7 | ✓ Full exchange observed |
| 09-18 19:49 | 60m | -12 / - | EA3LA | -20 / +2 | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 205500 -1 1859 C31CT SM0CXS JO99 205500 -1 989 C31CT RW4M LO44 205500 -4 1571 C31CT DK8ZT R-16 205530 -3 1859 C31CT SM0CXS JO99 205530 +7 989 C31CT RW4M LO44 205530 -5 1535 C31CT RD7O KN98 205530 -7 1571 C31CT DK8ZT 73 205530 -18 1064 C31CT CT2GQA IM58 205600 +11 989 C31CT RW4M R+00 205630 -9 2197 C31CT SM0CXS JO99 205630 +9 989 C31CT RW4M 73 205630 -12 1068 C31CT RA3ZH KO81 (x3) 205730 -20 1064 C31CT CT2GQA 73
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
UTC dB Audio Message 193330 +8 2402 C31CT DL5RDP -11 (x2) 193500 -12 577 C31CT EA1R R-05 193700 -9 2150 CQ C31CT JN02 a1 (x2) 193745 -11 1994 C31CT R2OB -12 (x2) 193815 +0 2150 C31CT OE5ABL -15 193815 -2 2908 C31CT DK2MAX JN58 193845 -12 1994 C31CT R2OB -12 193845 +2 1215 C31CT OM7RU JN98 193845 -14 2150 C31CT OE5ABL -15 193915 +14 1215 C31CT OM7RU JN98 (x3)
UTC dB Audio Message 202745 -17 2200 C31CT OT8T 73 202815 -14 1203 C31CT RC6BB KN84 202845 -18 893 C31CT EA4IAH R+05 202915 -12 1203 C31CT RC6BB KN84 202915 +11 314 C31CT R3KON KO91 202945 -11 1203 C31CT RC6BB KN84 202945 -11 2176 <C31CT> OZ/DB1LBS 204745 -9 2176 EA3JAQ C31CT JN02 (x2) 205100 -7 1502 C31CT GI8RPM RR73 205115 -9 2176 GI8RPM C31CT 73 205200 -8 2176 C31CT IU2VUD JN45 205245 -9 2176 IU2VUD C31CT -12 205400 +9 1089 C31CT DJ4MM JO52 (x2)
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
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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