sensors Mode-S transponder

AAE2FA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N800MK · GULFSTREAM G650 · operated by MERCK SHARP & DOHME LLC

Hex
AAE2FA
Octal
52561372
Decimal
11,199,226
Country
US
Tail
N800MK
Type
GLF6
No current signal · last broadcast 1d ago
Flights observed
4
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AAE2FA.

Country allocation

The ICAO 24-bit address AAE2FA 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
N800MK - 4 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 N800MK - Apr 13, 17:10 UTCApr 13, 19:10 UTC2h 0m
2026-04-13 N800MK - Apr 13, 12:20 UTCApr 13, 13:35 UTC1h 15m
2026-04-13 N800MK - Apr 13, 11:55 UTCApr 13, 12:15 UTC20m
2026-04-13 N800MK - Apr 13, 09:30 UTCApr 13, 09:58 UTC28m

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 N800MK page for operator, model, and routing details .

Mode-S AAE2FA frequently asked

What is Mode-S code AAE2FA?
AAE2FA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N800MK.
Where is Mode-S AAE2FA registered?
Mode-S code AAE2FA 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 AAE2FA broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAE2FA, octal 52561372, decimal 11,199,226.
What flights does AAE2FA operate?
Mode-S AAE2FA has broadcast 1 distinct callsign, including N800MK.