Apparatus

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sensors Mode-S transponder

A81490

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N62GX · PILATUS PC-12 · operated by SOUTHPORT AIR LLC

Hex
A81490
Octal
52012220
Decimal
11,015,312
Country
US
Tail
N62GX
Type
PC12
No current signal · last broadcast 5h ago
Flights observed
46
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A81490.

Country allocation

The ICAO 24-bit address A81490 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
STT62 Air St. Thomas 46 2026-06-03

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-06-03 STT62 SFO → OTH Jun 3, 02:10 UTCJun 3, 03:30 UTC1h 20m
2026-06-03 STT62 SFO → OTH Jun 3, 00:40 UTCJun 3, 01:10 UTC30m
2026-06-02 STT62 SFO → OTH Jun 2, 16:20 UTCJun 2, 16:55 UTC35m
2026-06-01 STT62 SFO → OTH Jun 1, 22:45 UTCJun 1, 23:45 UTC1h 0m
2026-06-01 STT62 SFO → OTH Jun 1, 15:45 UTCJun 1, 16:50 UTC1h 5m
2026-06-01 STT62 SFO → OTH Jun 1, 01:00 UTCJun 1, 02:20 UTC1h 20m
2026-05-31 STT62 SFO → OTH May 31, 23:00 UTCJun 1, 00:10 UTC1h 10m
2026-05-29 STT62 SFO → OTH May 29, 00:30 UTCMay 29, 01:20 UTC50m
2026-05-28 STT62 SFO → OTH May 28, 19:15 UTCMay 28, 20:55 UTC1h 40m
2026-05-22 STT62 SFO → OTH May 22, 01:10 UTCMay 22, 01:35 UTC25m
2026-05-21 STT62 SFO → OTH May 21, 23:55 UTCMay 22, 00:25 UTC30m
2026-05-21 STT62 SFO → OTH May 21, 20:05 UTCMay 21, 20:45 UTC40m
2026-05-21 STT62 SFO → OTH May 21, 14:45 UTCMay 21, 14:55 UTC10m
2026-05-20 STT62 SFO → OTH May 20, 18:45 UTCMay 20, 20:40 UTC1h 55m
2026-05-20 STT62 SFO → OTH May 20, 16:40 UTCMay 20, 17:15 UTC35m
2026-05-20 STT62 SFO → OTH May 20, 14:40 UTCMay 20, 15:10 UTC30m
2026-05-19 STT62 SFO → OTH May 19, 00:35 UTCMay 19, 02:00 UTC1h 25m
2026-05-18 STT62 SFO → OTH May 18, 21:20 UTCMay 19, 00:05 UTC2h 45m
2026-05-18 STT62 SFO → OTH May 18, 16:30 UTCMay 18, 17:35 UTC1h 5m
2026-05-18 STT62 SFO → OTH May 18, 14:50 UTCMay 18, 15:55 UTC1h 5m
2026-05-18 STT62 SFO → OTH May 18, 13:00 UTCMay 18, 14:15 UTC1h 15m
2026-05-14 STT62 SFO → OTH May 14, 21:50 UTCMay 14, 22:00 UTC10m
2026-05-14 STT62 SFO → OTH May 14, 19:20 UTCMay 14, 20:30 UTC1h 10m
2026-05-07 STT62 SFO → OTH May 7, 23:39 UTCMay 8, 00:09 UTC30m
2026-05-07 STT62 SFO → OTH May 7, 22:45 UTCMay 7, 23:05 UTC20m
2026-05-07 STT62 SFO → OTH May 7, 19:05 UTCMay 7, 20:40 UTC1h 35m
2026-05-02 STT62 SFO → OTH May 2, 19:05 UTCMay 2, 19:20 UTC15m
2026-05-02 STT62 SFO → OTH May 2, 16:05 UTCMay 2, 18:00 UTC1h 55m
2026-04-29 STT62 SFO → OTH Apr 29, 21:25 UTCApr 29, 22:50 UTC1h 25m
2026-04-24 STT62 SFO → OTH Apr 24, 18:35 UTCApr 24, 19:30 UTC55m
2026-04-24 STT62 SFO → OTH Apr 24, 16:55 UTCApr 24, 18:00 UTC1h 5m
2026-04-23 STT62 SFO → OTH Apr 23, 23:20 UTCApr 23, 23:40 UTC20m
2026-04-23 STT62 SFO → OTH Apr 23, 22:20 UTCApr 23, 22:45 UTC25m
2026-04-23 STT62 SFO → OTH Apr 23, 19:35 UTCApr 23, 20:50 UTC1h 15m
2026-04-22 STT62 SFO → OTH Apr 22, 23:00 UTCApr 23, 00:10 UTC1h 10m
2026-04-22 STT62 SFO → OTH Apr 22, 16:50 UTCApr 22, 18:00 UTC1h 10m
2026-04-22 STT62 SFO → OTH Apr 22, 14:15 UTCApr 22, 15:25 UTC1h 10m
2026-04-21 STT62 SFO → OTH Apr 21, 01:05 UTCApr 21, 02:20 UTC1h 15m
2026-04-21 STT62 SFO → OTH Apr 21, 00:10 UTCApr 21, 00:40 UTC30m
2026-04-19 STT62 SFO → OTH Apr 19, 01:25 UTCApr 19, 02:30 UTC1h 5m
2026-04-18 STT62 SFO → OTH Apr 18, 22:30 UTCApr 18, 23:45 UTC1h 15m
2026-04-15 STT62 SFO → OTH Apr 15, 19:05 UTCApr 15, 20:05 UTC1h 0m
2026-04-13 STT62 - Apr 13, 01:45 UTCApr 13, 02:15 UTC30m
2026-04-13 STT62 - Apr 13, 00:25 UTCApr 13, 01:00 UTC35m
2026-04-12 STT62 - Apr 12, 19:20 UTCApr 12, 19:45 UTC25m
2026-04-12 STT62 - Apr 12, 18:15 UTCApr 12, 18:50 UTC35m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N62GX page for operator, model, and routing details .

Mode-S A81490 frequently asked

What is Mode-S code A81490?
A81490 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N62GX.
Where is Mode-S A81490 registered?
Mode-S code A81490 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A81490 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A81490, octal 52012220, decimal 11,015,312.
What flights does A81490 operate?
Mode-S A81490 has broadcast 1 distinct callsign, including STT62.