sensors Mode-S transponder

ACF0DB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N933AN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
ACF0DB
Octal
53170333
Decimal
11,333,851
Country
US
Tail
N933AN
Type
B738
No current signal · last broadcast 1d ago
Flights observed
8
Distinct callsigns
5
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ACF0DB.

Country allocation

The ICAO 24-bit address ACF0DB 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 5 distinct

Callsign Airline Flights Last seen
AAL2310 - 2 2026-04-13
AAL1919 - 2 2026-04-13
AAL1760 American Airlines 2 2026-04-13
AAL2613 - 1 2026-04-13
AAL2221 - 1 2026-04-12

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 AAL2613 LGA → PBI Apr 13, 20:30 UTCApr 13, 23:04 UTC2h 34m
2026-04-13 AAL1760 PHX → AUS Apr 13, 17:21 UTCApr 13, 18:50 UTC1h 29m
2026-04-13 AAL1760 PHX → AUS Apr 13, 17:20 UTCApr 13, 18:44 UTC1h 24m
2026-04-13 AAL2310 - Apr 13, 14:40 UTCApr 13, 15:45 UTC1h 5m
2026-04-13 AAL2310 - Apr 13, 12:30 UTCApr 13, 13:25 UTC55m
2026-04-13 AAL1919 - Apr 13, 00:20 UTCApr 13, 01:00 UTC40m
2026-04-12 AAL1919 - Apr 12, 23:55 UTCApr 13, 01:00 UTC1h 5m
2026-04-12 AAL2221 - Apr 12, 18:07 UTCApr 12, 19:12 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 N933AN page for operator, model, and routing details .

Mode-S ACF0DB frequently asked

What is Mode-S code ACF0DB?
ACF0DB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N933AN.
Where is Mode-S ACF0DB registered?
Mode-S code ACF0DB 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 ACF0DB 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 ACF0DB, octal 53170333, decimal 11,333,851.
What flights does ACF0DB operate?
Mode-S ACF0DB has broadcast 5 distinct callsigns, including AAL2310, AAL1919, AAL1760, AAL2613, AAL2221.