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sensors Mode-S transponder

A99039

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N715SJ · PILATUS PC-12 · operated by TNH LEASING LLC

Hex
A99039
Octal
52310071
Decimal
11,112,505
Country
US
Tail
N715SJ
Type
PC12
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
179
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A99039.

Country allocation

The ICAO 24-bit address A99039 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
N715SJ - 179 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N715SJ - Jul 26, 21:55 UTCJul 26, 22:15 UTC20m
2026-07-26 N715SJ - Jul 26, 18:20 UTCJul 26, 21:10 UTC2h 50m
2026-07-26 N715SJ - Jul 26, 17:10 UTCJul 26, 18:00 UTC50m
2026-07-26 N715SJ - Jul 26, 03:30 UTCJul 26, 04:10 UTC40m
2026-07-26 N715SJ - Jul 26, 01:05 UTCJul 26, 02:55 UTC1h 50m
2026-07-25 N715SJ - Jul 25, 21:45 UTCJul 25, 23:50 UTC2h 5m
2026-07-25 N715SJ - Jul 25, 17:15 UTCJul 25, 18:00 UTC45m
2026-07-25 N715SJ - Jul 25, 00:20 UTCJul 25, 01:05 UTC45m
2026-07-24 N715SJ - Jul 24, 21:00 UTCJul 24, 23:20 UTC2h 20m
2026-07-24 N715SJ - Jul 24, 18:30 UTCJul 24, 19:15 UTC45m
2026-07-24 N715SJ ILI → ANC Jul 24, 17:00 UTCJul 24, 17:50 UTC50m
2026-07-23 N715SJ - Jul 23, 23:30 UTCJul 24, 00:15 UTC45m
2026-07-23 N715SJ - Jul 23, 20:40 UTCJul 23, 21:30 UTC50m
2026-07-23 N715SJ - Jul 23, 18:45 UTCJul 23, 19:40 UTC55m
2026-07-23 N715SJ - Jul 23, 17:20 UTCJul 23, 18:05 UTC45m
2026-07-22 N715SJ - Jul 22, 23:10 UTCJul 23, 00:00 UTC50m
2026-07-22 N715SJ - Jul 22, 21:25 UTCJul 22, 22:10 UTC45m
2026-07-22 N715SJ - Jul 22, 18:45 UTCJul 22, 19:40 UTC55m
2026-07-22 N715SJ ILI → ANC Jul 22, 17:15 UTCJul 22, 18:00 UTC45m
2026-07-22 N715SJ - Jul 22, 01:35 UTCJul 22, 02:30 UTC55m
2026-07-21 N715SJ - Jul 21, 19:55 UTCJul 21, 21:05 UTC1h 10m
2026-07-21 N715SJ - Jul 21, 18:45 UTCJul 21, 19:05 UTC20m
2026-07-21 N715SJ ANC → AKN Jul 21, 17:00 UTCJul 21, 18:25 UTC1h 25m
2026-07-20 N715SJ - Jul 20, 19:25 UTCJul 20, 20:20 UTC55m
2026-07-20 N715SJ - Jul 20, 17:25 UTCJul 20, 18:20 UTC55m
2026-07-19 N715SJ - Jul 19, 00:25 UTCJul 19, 01:35 UTC1h 10m
2026-07-18 N715SJ - Jul 18, 22:05 UTCJul 18, 23:20 UTC1h 15m
2026-07-18 N715SJ - Jul 18, 17:05 UTCJul 18, 17:50 UTC45m
2026-07-18 N715SJ - Jul 18, 01:54 UTCJul 18, 02:14 UTC20m
2026-07-18 N715SJ - Jul 18, 01:00 UTCJul 18, 01:30 UTC30m
2026-07-17 N715SJ - Jul 17, 23:00 UTCJul 17, 23:39 UTC40m
2026-07-17 N715SJ ILI → ANC Jul 17, 21:20 UTCJul 17, 22:10 UTC50m
2026-07-17 N715SJ - Jul 17, 19:35 UTCJul 17, 20:20 UTC45m
2026-07-17 N715SJ - Jul 17, 17:35 UTCJul 17, 18:19 UTC45m
2026-07-17 N715SJ - Jul 17, 02:50 UTCJul 17, 03:39 UTC50m
2026-07-17 N715SJ - Jul 17, 00:30 UTCJul 17, 01:49 UTC1h 20m
2026-07-16 N715SJ - Jul 16, 21:55 UTCJul 16, 23:15 UTC1h 20m
2026-07-16 N715SJ ILI → ANC Jul 16, 18:40 UTCJul 16, 19:25 UTC45m
2026-07-16 N715SJ - Jul 16, 16:44 UTCJul 16, 17:25 UTC40m
2026-07-16 N715SJ WWA → ANC Jul 16, 02:50 UTCJul 16, 03:05 UTC15m
2026-07-12 N715SJ - Jul 12, 20:25 UTCJul 12, 20:40 UTC15m
2026-07-12 N715SJ AKN → ANC Jul 12, 19:01 UTCJul 12, 20:05 UTC1h 5m
2026-07-12 N715SJ - Jul 12, 18:20 UTCJul 12, 18:45 UTC25m
2026-07-12 N715SJ - Jul 12, 16:55 UTCJul 12, 17:40 UTC45m
2026-07-12 N715SJ - Jul 12, 02:50 UTCJul 12, 03:40 UTC50m
2026-07-05 N715SJ - Jul 5, 23:20 UTCJul 5, 23:55 UTC35m
2026-07-05 N715SJ - Jul 5, 21:45 UTCJul 5, 22:40 UTC55m
2026-07-04 N715SJ - Jul 4, 22:55 UTCJul 4, 23:35 UTC40m
2026-07-04 N715SJ - Jul 4, 15:55 UTCJul 4, 16:35 UTC40m
2026-07-02 N715SJ - Jul 2, 17:00 UTCJul 2, 17:40 UTC40m

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 N715SJ page for operator, model, and routing details .

Mode-S A99039 frequently asked

What is Mode-S code A99039?
A99039 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N715SJ.
Where is Mode-S A99039 registered?
Mode-S code A99039 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 A99039 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A99039, octal 52310071, decimal 11,112,505.
What flights does A99039 operate?
Mode-S A99039 has broadcast 1 distinct callsign, including N715SJ.