sensors Mode-S transponder

AC047D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N87345 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC047D
Octal
53002175
Decimal
11,273,341
Country
US
Tail
N87345
Type
E75L
Broadcasting now · callsign ASH4020 · 22,200 ft
Flights observed
4
Distinct callsigns
4
Country
US
Last broadcast
1d ago

Current position

AC047D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC047D 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
ASH6326 - 1 2026-04-13
ASH6190 Mesa Airlines 1 2026-04-12
ASH6119 Mesa Airlines 1 2026-04-13
ASH6116 Mesa Airlines 1 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 ASH6116 LGA → IAH Apr 13, 20:55 UTCApr 13, 23:40 UTC2h 45m
2026-04-13 ASH6119 LGA → IAH Apr 13, 17:20 UTCApr 13, 19:35 UTC2h 15m
2026-04-13 ASH6326 - Apr 13, 13:20 UTCApr 13, 15:15 UTC1h 55m
2026-04-12 ASH6190 YOW → IAD Apr 12, 17:55 UTCApr 12, 18:50 UTC55m

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 N87345 page for operator, model, and routing details .

Mode-S AC047D frequently asked

What is Mode-S code AC047D?
AC047D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N87345.
Where is Mode-S AC047D registered?
Mode-S code AC047D 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 AC047D broadcasting right now?
Yes. Mode-S AC047D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC047D, octal 53002175, decimal 11,273,341.
What flights does AC047D operate?
Mode-S AC047D has broadcast 4 distinct callsigns, including ASH6326, ASH6190, ASH6119, ASH6116.