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sensors Mode-S transponder

AB2388

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N817BT · CESSNA 525C Citation CJ4 · operated by 525-0635 LLC

Hex
AB2388
Octal
52621610
Decimal
11,215,752
Country
US
Tail
N817BT
Type
C25C
No current signal · last broadcast 10d ago
Flights observed
37
Distinct callsigns
1
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S AB2388.

Country allocation

The ICAO 24-bit address AB2388 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
N817BT - 37 2026-07-26

Recent flights last 37

DateFlightRouteTakeoffLandingDuration
2026-07-26 N817BT - Jul 26, 17:40 UTCJul 26, 18:45 UTC1h 5m
2026-07-25 N817BT - Jul 25, 17:40 UTCJul 25, 18:35 UTC55m
2026-07-24 N817BT - Jul 24, 01:35 UTCJul 24, 02:30 UTC55m
2026-07-21 N817BT - Jul 21, 01:35 UTCJul 21, 02:30 UTC55m
2026-07-17 N817BT - Jul 17, 00:14 UTCJul 17, 01:15 UTC1h 0m
2026-07-14 N817BT - Jul 14, 01:05 UTCJul 14, 02:00 UTC55m
2026-07-10 N817BT - Jul 10, 00:50 UTCJul 10, 01:45 UTC55m
2026-07-07 N817BT - Jul 7, 02:15 UTCJul 7, 03:10 UTC55m
2026-07-05 N817BT - Jul 5, 23:00 UTCJul 5, 23:55 UTC55m
2026-07-02 N817BT - Jul 2, 23:55 UTCJul 3, 00:55 UTC1h 0m
2026-07-02 N817BT - Jul 2, 19:55 UTCJul 2, 20:45 UTC50m
2026-06-30 N817BT - Jun 30, 23:50 UTCJul 1, 02:10 UTC2h 20m
2026-06-30 N817BT - Jun 30, 00:04 UTCJun 30, 01:04 UTC1h 0m
2026-06-26 N817BT - Jun 26, 01:05 UTCJun 26, 02:00 UTC55m
2026-06-23 N817BT - Jun 23, 00:50 UTCJun 23, 01:45 UTC55m
2026-06-21 N817BT - Jun 21, 19:55 UTCJun 21, 20:50 UTC55m
2026-06-20 N817BT - Jun 20, 00:49 UTCJun 20, 01:50 UTC1h 0m
2026-06-19 N817BT - Jun 19, 04:25 UTCJun 19, 05:19 UTC55m
2026-06-15 N817BT - Jun 15, 19:39 UTCJun 15, 20:40 UTC1h 0m
2026-06-12 N817BT - Jun 12, 00:15 UTCJun 12, 01:10 UTC56m
2026-06-09 N817BT - Jun 9, 01:10 UTCJun 9, 02:10 UTC1h 0m
2026-06-05 N817BT - Jun 5, 00:45 UTCJun 5, 01:45 UTC1h 0m
2026-06-02 N817BT - Jun 2, 00:05 UTCJun 2, 01:00 UTC55m
2026-05-29 N817BT - May 29, 01:15 UTCMay 29, 02:05 UTC50m
2026-05-26 N817BT - May 26, 01:24 UTCMay 26, 02:24 UTC1h 0m
2026-05-22 N817BT - May 22, 01:10 UTCMay 22, 02:05 UTC55m
2026-05-19 N817BT - May 19, 01:40 UTCMay 19, 02:40 UTC1h 0m
2026-05-17 N817BT - May 17, 17:30 UTCMay 17, 18:35 UTC1h 5m
2026-05-15 N817BT - May 15, 23:35 UTCMay 16, 00:25 UTC50m
2026-05-15 N817BT - May 15, 00:40 UTCMay 15, 01:40 UTC1h 0m
2026-05-07 N817BT - May 7, 23:49 UTCMay 8, 00:49 UTC1h 0m
2026-05-05 N817BT - May 5, 02:01 UTCMay 5, 03:05 UTC1h 5m
2026-05-01 N817BT - May 1, 00:35 UTCMay 1, 01:30 UTC55m
2026-04-28 N817BT - Apr 28, 00:05 UTCApr 28, 01:10 UTC1h 5m
2026-04-24 N817BT - Apr 24, 00:00 UTCApr 24, 00:55 UTC55m
2026-04-21 N817BT - Apr 21, 01:20 UTCApr 21, 02:15 UTC55m
2026-04-17 N817BT - Apr 17, 00:25 UTCApr 17, 01:15 UTC50m

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 N817BT page for operator, model, and routing details .

Mode-S AB2388 frequently asked

What is Mode-S code AB2388?
AB2388 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N817BT.
Where is Mode-S AB2388 registered?
Mode-S code AB2388 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 AB2388 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB2388, octal 52621610, decimal 11,215,752.
What flights does AB2388 operate?
Mode-S AB2388 has broadcast 1 distinct callsign, including N817BT.