sensors Mode-S transponder

A7E54F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N608DN · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A7E54F
Octal
51762517
Decimal
11,003,215
Country
US
Tail
N608DN
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
13
Distinct callsigns
5
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A7E54F.

Country allocation

The ICAO 24-bit address A7E54F 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
DAL1655 - 4 2026-04-13
DAL996 - 3 2026-04-13
DAL495 Delta Air Lines 3 2026-04-13
DAL867 - 2 2026-04-13
DAL400 - 1 2026-04-12

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-13 DAL867 - Apr 13, 19:50 UTCApr 13, 22:35 UTC2h 45m
2026-04-13 DAL867 - Apr 13, 18:15 UTCApr 13, 20:10 UTC1h 55m
2026-04-13 DAL996 - Apr 13, 15:50 UTCApr 13, 16:20 UTC30m
2026-04-13 DAL996 - Apr 13, 12:20 UTCApr 13, 16:15 UTC3h 55m
2026-04-13 DAL996 - Apr 13, 11:53 UTCApr 13, 16:12 UTC4h 19m
2026-04-13 DAL495 SFO → DTW Apr 13, 08:20 UTCApr 13, 10:25 UTC2h 5m
2026-04-13 DAL495 SFO → DTW Apr 13, 07:55 UTCApr 13, 10:25 UTC2h 30m
2026-04-13 DAL495 SFO → DTW Apr 13, 06:22 UTCApr 13, 10:19 UTC3h 57m
2026-04-13 DAL1655 - Apr 13, 04:20 UTCApr 13, 04:50 UTC30m
2026-04-13 DAL1655 - Apr 13, 03:55 UTCApr 13, 04:50 UTC55m
2026-04-13 DAL1655 - Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m
2026-04-12 DAL1655 - Apr 12, 23:55 UTCApr 13, 03:50 UTC3h 55m
2026-04-12 DAL400 - Apr 12, 17:15 UTCApr 12, 19:50 UTC2h 35m

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 N608DN page for operator, model, and routing details .

Mode-S A7E54F frequently asked

What is Mode-S code A7E54F?
A7E54F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N608DN.
Where is Mode-S A7E54F registered?
Mode-S code A7E54F 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 A7E54F 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 A7E54F, octal 51762517, decimal 11,003,215.
What flights does A7E54F operate?
Mode-S A7E54F has broadcast 5 distinct callsigns, including DAL1655, DAL996, DAL495, DAL867, DAL400.