sensors Mode-S transponder

ADE2B8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N994NN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
ADE2B8
Octal
53361270
Decimal
11,395,768
Country
US
Tail
N994NN
Type
B738
No current signal · last broadcast 1d ago
Flights observed
10
Distinct callsigns
6
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ADE2B8.

Country allocation

The ICAO 24-bit address ADE2B8 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 6 distinct

Callsign Airline Flights Last seen
AAL1958 American Airlines 3 2026-04-13
AAL3154 - 2 2026-04-13
AAL1011 American Airlines 2 2026-04-13
AAL3269 - 1 2026-04-13
AAL2413 - 1 2026-04-12
AAL1969 American Airlines 1 2026-04-12

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-13 AAL3269 - Apr 13, 21:14 UTCApr 13, 23:02 UTC1h 48m
2026-04-13 AAL1011 BDA → PHL Apr 13, 19:50 UTCApr 13, 19:55 UTC5m
2026-04-13 AAL1011 BDA → PHL Apr 13, 16:41 UTCApr 13, 19:47 UTC3h 6m
2026-04-13 AAL1958 MIA → SFO Apr 13, 12:20 UTCApr 13, 15:15 UTC2h 55m
2026-04-13 AAL1958 MIA → SFO Apr 13, 11:55 UTCApr 13, 15:15 UTC3h 20m
2026-04-13 AAL1958 MIA → SFO Apr 13, 11:12 UTCApr 13, 15:27 UTC4h 15m
2026-04-13 AAL3154 DFW → CMH Apr 13, 00:25 UTCApr 13, 02:20 UTC1h 55m
2026-04-12 AAL3154 - Apr 12, 23:55 UTCApr 13, 01:56 UTC2h 1m
2026-04-12 AAL2413 - Apr 12, 20:05 UTCApr 12, 20:15 UTC10m
2026-04-12 AAL1969 SRQ → ORD Apr 12, 17:15 UTCApr 12, 18:35 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 N994NN page for operator, model, and routing details .

Mode-S ADE2B8 frequently asked

What is Mode-S code ADE2B8?
ADE2B8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N994NN.
Where is Mode-S ADE2B8 registered?
Mode-S code ADE2B8 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 ADE2B8 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 ADE2B8, octal 53361270, decimal 11,395,768.
What flights does ADE2B8 operate?
Mode-S ADE2B8 has broadcast 6 distinct callsigns, including AAL1958, AAL3154, AAL1011, AAL3269, AAL2413.