sensors Mode-S transponder

A4556D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N379CA · BOMBARDIER Regional Jet CRJ-700 · operated by DELTA AIR LINES INC

Hex
A4556D
Octal
51052555
Decimal
10,769,773
Country
US
Tail
N379CA
Type
CRJ7
No current signal · last broadcast 1d ago
Flights observed
13
Distinct callsigns
7
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A4556D.

Country allocation

The ICAO 24-bit address A4556D 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 7 distinct

Callsign Airline Flights Last seen
EDV5420 - 3 2026-04-13
EDV5287 Endeavor Air 3 2026-04-13
EDV5304 - 2 2026-04-13
EDV4912 Endeavor Air 2 2026-04-13
EDV5029 - 1 2026-04-12
EDV4910 - 1 2026-04-13
EDV4644 - 1 2026-04-12

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-13 EDV5287 PWM → JFK Apr 13, 22:55 UTCApr 13, 23:31 UTC36m
2026-04-13 EDV5287 PWM → JFK Apr 13, 21:40 UTCApr 13, 22:00 UTC20m
2026-04-13 EDV5287 PWM → JFK Apr 13, 20:42 UTCApr 13, 21:22 UTC40m
2026-04-13 EDV5420 - Apr 13, 19:50 UTCApr 13, 20:25 UTC35m
2026-04-13 EDV5420 - Apr 13, 19:00 UTCApr 13, 20:17 UTC1h 17m
2026-04-13 EDV5420 - Apr 13, 16:39 UTCApr 13, 17:59 UTC1h 20m
2026-04-13 EDV5304 - Apr 13, 15:22 UTCApr 13, 15:53 UTC31m
2026-04-13 EDV5304 - Apr 13, 13:50 UTCApr 13, 14:10 UTC20m
2026-04-13 EDV4912 RDU → LGA Apr 13, 11:55 UTCApr 13, 12:10 UTC15m
2026-04-13 EDV4912 RDU → LGA Apr 13, 11:10 UTCApr 13, 12:06 UTC56m
2026-04-13 EDV4910 - Apr 13, 00:45 UTCApr 13, 01:15 UTC30m
2026-04-12 EDV5029 - Apr 12, 20:05 UTCApr 12, 20:15 UTC10m
2026-04-12 EDV4644 - Apr 12, 18:10 UTCApr 12, 18:45 UTC35m

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 N379CA page for operator, model, and routing details .

Mode-S A4556D frequently asked

What is Mode-S code A4556D?
A4556D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N379CA.
Where is Mode-S A4556D registered?
Mode-S code A4556D 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 A4556D 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 A4556D, octal 51052555, decimal 10,769,773.
What flights does A4556D operate?
Mode-S A4556D has broadcast 7 distinct callsigns, including EDV5420, EDV5287, EDV5304, EDV4912, EDV5029.