7X4BL — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Algeria Most frequent locator attributed to this token: IM94

Receiver-side FT8 activity involving 7X4BL, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-19 and 2026-09-15.

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 54 FT8 messages attributed to 7X4BL as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 20 m (31%). Most decodes (100%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (83%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 37 20m · 17

First attributed message: 2026-06-19
Last attributed message: 2026-09-15 23:46 UTC

Observed FT8 message patterns

Attributed sample: 54 messages
Active dates: 7 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -23 to -15 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 45, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 1.

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 7X4BL in decoded directed-looking exchanges:

OK1WCF · Czech Republic ×2 9A1MM · Croatia EA8UP · Canary Islands IZ5SIH · Italy YV5WL · Venezuela Z35T · North Macedonia CT1AZN · Portugal CT1FSG · Portugal EA8AR · Canary Islands G0BLB · England I2RFJ · Italy IV3FGT · 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 7X4BL

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: IM94 · 22 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,525 km (approx.)
Last such locator decoded: 2026-09-15 23:11 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	7X4BL S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 06:25	40m	- / -	S55A	0 / -	3	Partial capture
09-21 06:23	40m	- / -24	G0BLB	-8 / -	5	✓ Closing fragment
09-21 06:23	40m	- / -	F5MOO	+1 / -	8	Partial capture
09-21 06:23	40m	- / -9	ON1DGN	-17 / -	2	✓ Closing fragment
09-21 06:20	40m	- / -14	IV3FGT	-3 / -	2	✓ Closing fragment
09-18 05:48	40m	- / -	F4BYA	+4 / -	5	Partial capture
09-18 05:45	40m	- / -14	M0BEW	-8 / -	2	✓ Closing fragment
09-18 05:45	40m	- / -	F4BYA	+3 / -	2	Partial capture
09-18 05:35	40m	- / -15	PA4PA	+2 / -	4	Partial capture
09-18 05:35	40m	- / -	9A9BR	+14 / -	2	Partial capture
09-18 05:35	40m	- / -	E70N	-12 / -	2	Partial capture
09-18 05:34	40m	- / -	F4BYA	+4 / -	5	Partial capture
09-17 05:07	40m	- / -16	DL8WEM	+3 / -	3	Partial capture
09-15 23:47	40m	- / -	UN9LDA	-8 / -	2	Partial capture
09-15 23:43	40m	-15 / -	JY5IB	- / -22	5	Partial capture
09-15 23:29	40m	- / -16	SV1DZB	-7 / -	2	✓ Closing fragment
09-15 23:15	40m	- / -12	EA8AR	-15 / -	3	✓ Closing fragment
09-15 23:14	40m	-21 / -19	UA4FKT	+8 / -13	5	✓ Full exchange observed
09-11 06:36	40m	- / +6	F4AWT	-18 / -	2	Partial capture
09-11 06:24	40m	- / -25	I2RFJ	+1 / -	3	✓ Closing fragment
09-05 21:50	40m	- / -	KB1PA	-7 / -	5	Partial capture
09-02 04:45	40m	- / -	HB9HRR	-14 / -	2	Partial capture
09-02 04:43	40m	- / -	YO9CSM	0 / -	3	Partial capture
09-02 04:36	40m	- / -	SP9BGL	-17 / -	4	Partial capture
09-02 04:32	40m	- / -17	II7MGXX	-17 / -	3	Partial capture
09-02 04:31	40m	- / -	E75FM	+3 / -	2	Partial capture
09-02 04:28	40m	- / -	PA3BUD	+2 / -	6	Partial capture
09-02 04:26	40m	-20 / -	KO2E	-7 / -8	18	✓ Closing observed
09-02 04:21	40m	- / -	W4CHA	-6 / -	2	Partial capture
09-02 04:10	40m	-16 / -	UA3POG	- / -14	2	Partial capture
09-02 03:58	40m	- / -	W4CHA	-4 / -	2	Partial capture
09-02 03:50	40m	- / -19	WB8BPU	-7 / -	6	Partial capture
09-01 21:40	80m	- / -	SP6MAA	+1 / -	9	Partial capture
09-01 21:12	80m	- / -11	G3PMY	-18 / -	2	Partial capture
08-31 23:48	40m	-22 / -21	OK1WCF	-20 / -	4	✓ Closing observed
08-31 23:46	40m	- / -16	G0JJL/P	-14 / -	4	Partial capture
08-31 23:46	40m	-22 / -	WY5I	- / -11	2	Partial capture
08-31 23:44	40m	-24 / -7	CT1AZN	-6 / -10	5	✓ Full exchange observed
08-31 23:41	40m	- / -15	CT1FSG	-5 / -	2	✓ Closing fragment
08-31 23:41	40m	- / -	R3PJV	-19 / -	3	Partial capture
08-31 23:38	40m	- / -	SV1MOZ	-11 / -	3	Partial capture
08-31 23:37	40m	- / -	DA1LEO	+2 / -	2	Partial capture
08-31 23:37	40m	- / -	DL7ACA	-6 / -	3	Partial capture
08-31 06:44	20m	- / -	DL2DT	-5 / -	2	Partial capture
08-31 06:44	20m	- / -7	IZ5SIH	-3 / -	4	✓ Closing fragment
08-31 06:38	20m	- / -	F4HSB	-3 / -	3	Partial capture
08-27 08:10	20m	- / -16	TA3NK	+10 / -	2	Partial capture
08-26 20:10	40m	- / -	YL3MM	-4 / -	2	Partial capture
08-25 22:42	80m	- / -	9A4ZM	+10 / -	3	Partial capture
08-16 05:16	40m	- / -20	IK7ZLW	-24 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
062330  -6 1451  7X4BL G0BLB IO81
062330  +6 2303  7X4BL F5MOO JN07
062400  -6 1451  7X4BL G0BLB IO81
062400  +1 1725  7X4BL F5MOO JN07
062430 -11 1451  7X4BL G0BLB IO81
062430  +1 1725  7X4BL F5MOO JN07
062500  -7 1451  7X4BL G0BLB R-24
062500  -3 1725  7X4BL F5MOO JN07
062530  +2  599  7X4BL S55A JN65
062530  -8 1451  7X4BL G0BLB 73
062530  -1 1725  7X4BL F5MOO JN07
062600  +1  599  7X4BL S55A JN65
062600  +1 1725  7X4BL F5MOO JN07
062630  -3  599  7X4BL S55A JN65
062700  -4 1670  7X4BL F5MOO JN07

80m

UTC    dB Audio  Message
224230  +9 1752  7X4BL 9A4ZM JN86 (x3)
211245 -21  982  7X4BL G3PMY -11 (x2)
214045  -4  200  7X4BL SP6MAA JO90 (x9)

20m

UTC    dB Audio  Message
012145 -19 1139  CQ 7X4BL IM94 (x4)
063230 +17 1153  7X4BL IZ2CPP JN45
063430 -15 1152  7X4BL 9A1MM 73
063800  -4 1747  7X4BL F4HSB JN37 (x3)
064400  -4  704  7X4BL IZ5SIH JN53
064400  -4 1819  7X4BL DL2DT JN49
064430  +1  704  7X4BL IZ5SIH JN53
064430  -6 1819  7X4BL DL2DT JN49
064500  -6  704  7X4BL IZ5SIH R-07 (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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