Apparatus

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sensors Mode-S transponder

A20028

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N228QS · BOMBARDIER CL-600 Challenger · operated by NETJETS SALES INC, AIR NORD LLC, ANG RIDES LLC, BERG JET LLC, EAGLES WINGS LLC, MANNION MANAGEMENT CORP

Hex
A20028
Octal
50400050
Decimal
10,616,872
Country
US
Tail
N228QS
Type
CL60
No current signal · last broadcast 7h ago
Flights observed
94
Distinct callsigns
2
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A20028.

Country allocation

The ICAO 24-bit address A20028 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 2 distinct

Callsign Airline Flights Last seen
EJA228 - 77 2026-07-14
N228QS - 17 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EJA228 TEB → TEB Jul 14, 20:05 UTCJul 14, 21:15 UTC1h 10m
2026-07-02 EJA228 AGS → TEB Jul 2, 19:55 UTCJul 2, 21:35 UTC1h 40m
2026-06-14 EJA228 - Jun 14, 21:40 UTCJun 14, 23:50 UTC2h 10m
2026-06-14 N228QS - Jun 14, 12:55 UTCJun 14, 18:40 UTC5h 45m
2026-06-14 N228QS - Jun 14, 09:20 UTCJun 14, 11:35 UTC2h 15m
2026-06-13 N228QS - Jun 13, 10:20 UTCJun 13, 10:50 UTC30m
2026-06-11 N228QS - Jun 11, 12:55 UTCJun 11, 19:50 UTC6h 55m
2026-06-11 EJA228 TEB → BGR Jun 11, 10:20 UTCJun 11, 11:25 UTC1h 5m
2026-06-10 EJA228 STL → BFI Jun 10, 19:05 UTCJun 10, 21:50 UTC2h 45m
2026-06-08 EJA228 STL → BFI Jun 8, 13:45 UTCJun 8, 16:05 UTC2h 20m
2026-06-06 EJA228 STL → BFI Jun 6, 21:40 UTCJun 6, 23:05 UTC1h 25m
2026-06-05 N228QS DUB → IAD Jun 5, 23:40 UTCJun 6, 06:50 UTC7h 10m
2026-06-05 N228QS BER → DUB Jun 5, 20:25 UTCJun 5, 22:20 UTC1h 55m
2026-06-04 N228QS - Jun 4, 10:35 UTCJun 4, 13:00 UTC2h 25m
2026-06-04 EJA228 STL → BFI Jun 4, 02:15 UTCJun 4, 05:55 UTC3h 40m
2026-06-03 EJA228 STL → BFI Jun 3, 20:30 UTCJun 3, 22:30 UTC2h 0m
2026-06-03 EJA228 STL → BFI Jun 3, 18:25 UTCJun 3, 18:40 UTC15m
2026-06-02 EJA228 STL → BFI Jun 2, 23:05 UTCJun 3, 03:10 UTC4h 5m
2026-06-01 EJA228 STL → BFI Jun 1, 00:40 UTCJun 1, 01:05 UTC25m
2026-05-31 EJA228 STL → BFI May 31, 19:30 UTCMay 31, 23:05 UTC3h 35m
2026-05-29 EJA228 STL → BFI May 29, 19:50 UTCMay 29, 20:30 UTC40m
2026-05-29 N228QS EIS → AUS May 29, 13:50 UTCMay 29, 18:35 UTC4h 45m
2026-05-28 N228QS - May 28, 19:30 UTCMay 28, 19:55 UTC25m
2026-05-28 N228QS - May 28, 14:20 UTCMay 28, 16:25 UTC2h 5m
2026-05-27 EJA228 STL → BFI May 27, 16:35 UTCMay 27, 18:55 UTC2h 20m
2026-05-27 EJA228 STL → BFI May 27, 11:35 UTCMay 27, 15:15 UTC3h 40m
2026-05-26 EJA228 STL → BFI May 26, 20:09 UTCMay 26, 21:40 UTC1h 30m
2026-05-26 EJA228 STL → BFI May 26, 16:45 UTCMay 26, 18:34 UTC1h 50m
2026-05-25 N228QS - May 25, 10:50 UTCMay 25, 18:30 UTC7h 40m
2026-05-24 N228QS - May 24, 08:00 UTCMay 24, 10:00 UTC2h 0m
2026-05-23 N228QS - May 23, 10:40 UTCMay 23, 16:25 UTC5h 45m
2026-05-22 EJA228 STL → BFI May 22, 14:00 UTCMay 22, 14:40 UTC40m
2026-05-21 EJA228 STL → BFI May 21, 21:10 UTCMay 21, 21:45 UTC35m
2026-05-21 EJA228 STL → BFI May 21, 18:25 UTCMay 21, 20:45 UTC2h 20m
2026-05-21 N228QS - May 21, 15:15 UTCMay 21, 15:40 UTC25m
2026-05-21 N228QS - May 21, 13:45 UTCMay 21, 14:00 UTC15m
2026-05-21 EJA228 STL → BFI May 21, 12:45 UTCMay 21, 12:55 UTC10m
2026-05-17 EJA228 STL → BFI May 17, 23:30 UTCMay 18, 02:30 UTC3h 0m
2026-05-17 EJA228 STL → BFI May 17, 21:35 UTCMay 17, 22:40 UTC1h 5m
2026-05-17 EJA228 STL → BFI May 17, 18:30 UTCMay 17, 19:35 UTC1h 5m
2026-05-17 EJA228 STL → BFI May 17, 15:05 UTCMay 17, 16:35 UTC1h 30m
2026-05-16 EJA228 STL → BFI May 16, 22:10 UTCMay 16, 22:50 UTC40m
2026-05-16 EJA228 STL → BFI May 16, 19:30 UTCMay 16, 20:50 UTC1h 20m
2026-05-16 EJA228 STL → BFI May 16, 16:10 UTCMay 16, 17:05 UTC55m
2026-05-15 EJA228 STL → BFI May 15, 18:05 UTCMay 15, 19:00 UTC55m
2026-05-15 EJA228 STL → BFI May 15, 12:00 UTCMay 15, 15:05 UTC3h 4m
2026-05-14 EJA228 STL → BFI May 14, 20:40 UTCMay 14, 21:40 UTC1h 0m
2026-05-14 EJA228 STL → BFI May 14, 19:05 UTCMay 14, 19:55 UTC50m
2026-05-14 EJA228 STL → BFI May 14, 17:45 UTCMay 14, 18:25 UTC40m
2026-05-14 EJA228 STL → BFI May 14, 15:30 UTCMay 14, 16:20 UTC50m

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 N228QS page for operator, model, and routing details .

Mode-S A20028 frequently asked

What is Mode-S code A20028?
A20028 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N228QS.
Where is Mode-S A20028 registered?
Mode-S code A20028 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 A20028 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A20028, octal 50400050, decimal 10,616,872.
What flights does A20028 operate?
Mode-S A20028 has broadcast 2 distinct callsigns, including EJA228, N228QS.