sensors Mode-S transponder

AC5488

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N894DN · BOEING 737-900 · operated by DELTA AIR LINES INC

Hex
AC5488
Octal
53052210
Decimal
11,293,832
Country
US
Tail
N894DN
Type
B739
No current signal · last broadcast 23h ago
Flights observed
7
Distinct callsigns
4
Country
US
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S AC5488.

Country allocation

The ICAO 24-bit address AC5488 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 4 distinct

Callsign Airline Flights Last seen
DAL1536 - 3 2026-04-13
DAL2301 Delta Air Lines 2 2026-04-13
DAL962 - 1 2026-04-13
DAL2044 - 1 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 DAL962 - Apr 13, 21:54 UTCApr 13, 23:53 UTC1h 59m
2026-04-13 DAL2044 TPA → JFK Apr 13, 16:55 UTCApr 13, 19:02 UTC2h 7m
2026-04-13 DAL2301 MCO → BOS Apr 13, 12:20 UTCApr 13, 14:55 UTC2h 35m
2026-04-13 DAL2301 MCO → BOS Apr 13, 12:10 UTCApr 13, 14:55 UTC2h 45m
2026-04-13 DAL1536 - Apr 13, 00:20 UTCApr 13, 01:20 UTC1h 0m
2026-04-12 DAL1536 - Apr 12, 23:55 UTCApr 13, 01:20 UTC1h 25m
2026-04-12 DAL1536 - Apr 12, 17:45 UTCApr 12, 20:15 UTC2h 30m

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 N894DN page for operator, model, and routing details .

Mode-S AC5488 frequently asked

What is Mode-S code AC5488?
AC5488 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N894DN.
Where is Mode-S AC5488 registered?
Mode-S code AC5488 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 AC5488 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5488, octal 53052210, decimal 11,293,832.
What flights does AC5488 operate?
Mode-S AC5488 has broadcast 4 distinct callsigns, including DAL1536, DAL2301, DAL962, DAL2044.