NP4H — 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: Puerto Rico Most frequent locator attributed to this token: FN20

Receiver-side FT8 activity involving NP4H, decoded by SO8OO in southeastern Poland. 31 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-24 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 31 FT8 messages attributed to NP4H as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (81%), followed by 20 m (19%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (97%); the estimated median was -21 dB.

Overview

31
Messages attributed
6
UTC dates decoded
10
Active 15-min windows
-21 dB
Estimated median S/N

Bands

40m · 25 20m · 6
First attributed message: 2026-06-24
Last attributed message: 2026-09-19 00:28 UTC

Observed FT8 message patterns

Attributed sample
31 messages
Active dates
6 UTC dates
Estimated median S/N
-21 dB
Estimated 10th-90th percentile
-23 to -16 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.

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 NP4H in decoded directed-looking exchanges:

Most frequent locator attributed to NP4H

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
FN20 · 15 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,111 km (approx.)
Last such locator decoded
2026-09-19 00:21 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 UTCBandNP4H S/NCounterpartCounterpart S/NMsgsCapture
10-11 03:03 40m - / -8 PV8AJ -17 / - 2 ✓ Closing fragment
09-25 00:55 40m - / -16 F4CQS -2 / - 4 Partial capture
09-25 00:44 40m - / -12 F4CQS -1 / - 5 Partial capture
09-25 00:27 40m - / -1 F4CQS -5 / - 3 Partial capture
09-25 00:26 40m - / - F4BYA +12 / - 3 Partial capture
09-24 23:44 60m - / -16 F5MXH -2 / - 5 ✓ Closing fragment
09-19 01:01 40m - / - MI7XHT -10 / - 3 Partial capture
09-19 00:29 40m - / - MI7XHT -14 / - 2 Partial capture
09-19 00:21 40m - / - EA3NE -13 / - 3 Partial capture
09-19 00:16 40m - / - F4BYA +8 / - 3 Partial capture
09-19 00:15 40m - / - I1RJP -11 / - 7 Partial capture
09-18 23:47 40m - / - F4BYA +12 / - 3 Partial capture
09-18 23:43 40m - / - EA1BAF -2 / - 3 Partial capture
09-18 23:42 40m - / - F4BYA +9 / - 4 Partial capture
09-18 23:33 40m - / - I1RJP -6 / - 3 Partial capture
09-18 23:30 40m - / - F6FDY -2 / - 4 Partial capture
09-18 23:17 40m -22 / - EB1LA -8 / - 5 ✓ Closing observed
09-18 23:14 40m - / - G0GFC 0 / - 3 Partial capture
09-16 00:12 60m - / -13 F5RRS -16 / - 9 Partial capture
09-16 00:04 60m - / -14 M0LOW -4 / - 2 ✓ Closing fragment
09-15 23:59 60m - / -20 IK1BQD -8 / - 4 Partial capture
09-15 23:57 60m - / -4 DK7ZT -16 / - 2 ✓ Closing fragment
09-15 23:57 60m - / -11 ON8BB 0 / - 5 ✓ Closing fragment
09-15 23:56 60m - / 0 OR7K 0 / - 2 ✓ Closing fragment
09-15 23:25 40m - / -10 F1PBZ +11 / - 7 Partial capture
09-15 23:16 40m -16 / -4 EA5KB -19 / - 2 Partial capture
09-15 23:14 40m -17 / -12 DL1KMD -24 / - 2 ✓ Closing observed
09-15 23:13 40m - / - SV1DZB -3 / - 3 Partial capture
09-15 23:01 40m - / - EA5HM -10 / - 4 Partial capture
08-26 00:18 20m - / -12 KP4AH -17 / - 3 ✓ Closing fragment
08-26 00:08 20m - / +1 W4KWS -14 / - 3 ✓ Closing fragment
08-04 00:32 60m - / -15 S58N -16 / - 4 ✓ Closing fragment
08-03 22:42 80m - / - HB9RYB -18 / - 8 Partial capture
07-29 23:06 20m - / - M7XCO -17 / - 4 Partial capture
07-29 22:57 20m - / - M7XCO -7 / - 5 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
002745 +11 2881  NP4H F4BYA JN19
002815  -3 1744  NP4H F4CQS -01
003645 -18 1745  NP4H EB2EMZ IN83
004415  -5 1746  NP4H F4CQS -12 (x5)
004845 -21 1745  NP4H F5NBU 73
005515  +0 1744  NP4H F4CQS -16 (x4)
030315 -17 1345  NP4H PV8AJ R-08 (x2)
60m 
UTC    dB Audio  Message
000430  -2  436  NP4H M0LOW RR73
001245 -14 1975  NP4H F5RRS JN36 (x9)
234445  -4 2153  NP4H F5MXH JN07 (x5)
80m 
UTC    dB Audio  Message
224200 -18 1716  NP4H HB9RYB JN47 (x8)
234900 -14 2575  NP4H N1WI -06
235300 -21 2253  NP4H KQ4IJI +13
20m 
UTC    dB Audio  Message
225845  -7 2772  NP4H M7XCO IO74 (x7)
222645 -22 1927  S52BT NP4H RR73
000830 -14 1767  NP4H W4KWS EL94 (x3)
001845 -18 1565  NP4H KP4AH R-12 (x2)
001915 -21 1777  NP4H 9Y4DG -13
002115 -15 1564  NP4H KP4AH 73

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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