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 Jul 26, 19:05 UTC
Flights observed
95
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 19:05 UTC

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 95 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 STT62 SFO → OTH Jul 26, 16:55 UTCJul 26, 19:05 UTC2h 10m
2026-07-25 STT62 SFO → OTH Jul 25, 00:30 UTCJul 25, 01:40 UTC1h 10m
2026-07-23 STT62 SFO → OTH Jul 23, 23:35 UTCJul 24, 00:10 UTC35m
2026-07-23 STT62 SFO → OTH Jul 23, 21:35 UTCJul 23, 23:00 UTC1h 25m
2026-07-23 STT62 SFO → OTH Jul 23, 19:30 UTCJul 23, 19:40 UTC10m
2026-07-21 STT62 SFO → OTH Jul 21, 23:15 UTCJul 21, 23:45 UTC30m
2026-07-21 STT62 SFO → OTH Jul 21, 21:55 UTCJul 21, 22:05 UTC10m
2026-07-21 STT62 SFO → OTH Jul 21, 20:45 UTCJul 21, 21:20 UTC35m
2026-07-21 STT62 SFO → OTH Jul 21, 16:05 UTCJul 21, 16:45 UTC40m
2026-07-21 STT62 SFO → OTH Jul 21, 15:15 UTCJul 21, 15:30 UTC15m
2026-07-20 STT62 SFO → OTH Jul 20, 23:25 UTCJul 20, 23:40 UTC15m
2026-07-20 STT62 SFO → OTH Jul 20, 21:25 UTCJul 20, 22:10 UTC45m
2026-07-20 STT62 SFO → OTH Jul 20, 19:05 UTCJul 20, 20:05 UTC1h 0m
2026-07-19 STT62 - Jul 19, 22:40 UTCJul 19, 22:50 UTC10m
2026-07-19 STT62 - Jul 19, 17:00 UTCJul 19, 18:35 UTC1h 35m
2026-07-19 STT62 - Jul 19, 14:15 UTCJul 19, 15:45 UTC1h 30m
2026-07-17 STT62 - Jul 17, 21:44 UTCJul 17, 21:55 UTC10m
2026-07-17 STT62 - Jul 17, 18:55 UTCJul 17, 20:20 UTC1h 25m
2026-07-17 STT62 - Jul 17, 17:40 UTCJul 17, 17:50 UTC10m
2026-07-15 STT62 - Jul 15, 16:05 UTCJul 15, 16:45 UTC40m
2026-07-10 STT62 - Jul 10, 19:15 UTCJul 10, 19:55 UTC40m
2026-07-10 STT62 - Jul 10, 18:05 UTCJul 10, 18:40 UTC35m
2026-07-09 STT62 - Jul 9, 04:35 UTCJul 9, 06:05 UTC1h 30m
2026-07-08 STT62 - Jul 8, 23:55 UTCJul 9, 01:25 UTC1h 30m
2026-07-07 STT62 - Jul 7, 21:30 UTCJul 7, 21:50 UTC20m
2026-07-07 STT62 - Jul 7, 19:50 UTCJul 7, 20:15 UTC25m
2026-07-07 STT62 - Jul 7, 18:10 UTCJul 7, 19:15 UTC1h 5m
2026-07-06 STT62 - Jul 6, 20:55 UTCJul 7, 00:25 UTC3h 30m
2026-07-06 STT62 - Jul 6, 18:35 UTCJul 6, 19:40 UTC1h 5m
2026-07-06 STT62 - Jul 6, 16:10 UTCJul 6, 17:35 UTC1h 25m
2026-07-03 STT62 - Jul 3, 15:40 UTCJul 3, 17:20 UTC1h 40m
2026-07-03 STT62 - Jul 3, 13:30 UTCJul 3, 13:45 UTC15m
2026-07-02 STT62 - Jul 2, 01:40 UTCJul 2, 06:25 UTC4h 45m
2026-07-01 STT62 - Jul 1, 23:10 UTCJul 2, 00:05 UTC55m
2026-07-01 STT62 - Jul 1, 22:05 UTCJul 1, 22:25 UTC20m
2026-06-29 STT62 - Jun 29, 23:09 UTCJun 30, 00:30 UTC1h 20m
2026-06-20 STT62 - Jun 20, 17:14 UTCJun 20, 17:24 UTC10m
2026-06-18 STT62 - Jun 18, 00:20 UTCJun 18, 00:35 UTC15m
2026-06-16 STT62 SFO → OTH Jun 16, 21:55 UTCJun 16, 22:10 UTC15m
2026-06-12 STT62 SFO → OTH Jun 12, 21:50 UTCJun 12, 22:40 UTC50m
2026-06-12 STT62 SFO → OTH Jun 12, 17:00 UTCJun 12, 18:10 UTC1h 10m
2026-06-11 STT62 SFO → OTH Jun 11, 21:40 UTCJun 12, 00:10 UTC2h 30m
2026-06-11 STT62 SFO → OTH Jun 11, 06:55 UTCJun 11, 07:10 UTC15m
2026-06-11 STT62 SFO → OTH Jun 11, 05:15 UTCJun 11, 06:25 UTC1h 10m
2026-06-08 STT62 SFO → OTH Jun 8, 12:35 UTCJun 8, 14:05 UTC1h 30m
2026-06-06 STT62 SFO → OTH Jun 6, 16:45 UTCJun 6, 17:00 UTC15m
2026-06-06 STT62 SFO → OTH Jun 6, 15:10 UTCJun 6, 15:59 UTC50m
2026-06-03 STT62 SFO → OTH Jun 3, 16:25 UTCJun 3, 17:35 UTC1h 10m
2026-06-03 STT62 SFO → OTH Jun 3, 15:15 UTCJun 3, 15:35 UTC20m
2026-06-03 STT62 SFO → OTH Jun 3, 02:10 UTCJun 3, 03:30 UTC1h 20m

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 Jul 26, 19:05 UTC.
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.