sensors Mode-S transponder

AA7198

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N772MR · EMBRAER ERJ-170-100 · operated by AMERICAN AIRLINES INC

Hex
AA7198
Octal
52470630
Decimal
11,170,200
Country
US
Tail
N772MR
Type
E170
No current signal · last broadcast 22h ago
Flights observed
7
Distinct callsigns
3
Country
US
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S AA7198.

Country allocation

The ICAO 24-bit address AA7198 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 3 distinct

Callsign Airline Flights Last seen
ENY3582 - 4 2026-04-13
ENY3556 - 2 2026-04-13
ENY4221 - 1 2026-04-12

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 ENY3556 - Apr 13, 23:39 UTCApr 14, 00:39 UTC1h 0m
2026-04-13 ENY3556 - Apr 13, 22:00 UTCApr 13, 22:40 UTC40m
2026-04-13 ENY3582 MZZ → ORD Apr 13, 19:50 UTCApr 13, 20:30 UTC40m
2026-04-13 ENY3582 - Apr 13, 17:25 UTCApr 13, 20:10 UTC2h 45m
2026-04-13 ENY3582 - Apr 13, 15:50 UTCApr 13, 16:00 UTC10m
2026-04-13 ENY3582 - Apr 13, 13:30 UTCApr 13, 16:00 UTC2h 30m
2026-04-12 ENY4221 - Apr 12, 19:00 UTCApr 12, 20:05 UTC1h 5m

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 N772MR page for operator, model, and routing details .

Mode-S AA7198 frequently asked

What is Mode-S code AA7198?
AA7198 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N772MR.
Where is Mode-S AA7198 registered?
Mode-S code AA7198 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 AA7198 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7198, octal 52470630, decimal 11,170,200.
What flights does AA7198 operate?
Mode-S AA7198 has broadcast 3 distinct callsigns, including ENY3582, ENY3556, ENY4221.