Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1B12A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N208QS · BOMBARDIER CL-600 Challenger · operated by NETJETS SALES INC, ANALOG DEVICES INC, UNITED AUBURN INDIAN COMMUNITY, ISB DEVELOPMENT CORP, AVIANCO LLC, MANSUETO JOE

Hex
A1B12A
Octal
50330452
Decimal
10,596,650
Country
US
Tail
N208QS
Type
CL60
No current signal · last broadcast 1h ago
Flights observed
46
Distinct callsigns
2
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1B12A.

Country allocation

The ICAO 24-bit address A1B12A 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
EJA208 NetJets 40 2026-06-12
N208QS - 6 2026-05-20

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-06-12 EJA208 LAX → APC Jun 12, 17:40 UTCJun 12, 21:15 UTC3h 35m
2026-06-12 EJA208 LAX → APC Jun 12, 12:35 UTCJun 12, 14:55 UTC2h 20m
2026-06-11 EJA208 LAX → APC Jun 11, 16:50 UTCJun 11, 20:30 UTC3h 40m
2026-06-11 EJA208 LAX → APC Jun 11, 14:50 UTCJun 11, 15:35 UTC45m
2026-06-11 EJA208 LAX → APC Jun 11, 12:30 UTCJun 11, 12:50 UTC20m
2026-06-11 EJA208 LAX → APC Jun 11, 01:25 UTCJun 11, 06:10 UTC4h 45m
2026-06-10 EJA208 LAX → APC Jun 10, 22:20 UTCJun 10, 23:30 UTC1h 10m
2026-06-09 EJA208 LAX → APC Jun 9, 00:00 UTCJun 9, 05:05 UTC5h 5m
2026-06-07 EJA208 LAX → APC Jun 7, 18:20 UTCJun 7, 21:30 UTC3h 10m
2026-06-07 EJA208 LAX → APC Jun 7, 16:10 UTCJun 7, 16:20 UTC10m
2026-06-07 EJA208 LAX → APC Jun 7, 12:35 UTCJun 7, 15:10 UTC2h 35m
2026-06-06 EJA208 LAX → APC Jun 6, 19:04 UTCJun 6, 19:19 UTC15m
2026-06-05 EJA208 LAX → APC Jun 5, 00:15 UTCJun 5, 01:05 UTC50m
2026-06-04 EJA208 LAX → APC Jun 4, 19:10 UTCJun 4, 23:15 UTC4h 5m
2026-06-04 EJA208 LAX → APC Jun 4, 14:40 UTCJun 4, 15:50 UTC1h 10m
2026-05-31 EJA208 LAX → APC May 31, 15:45 UTCMay 31, 18:15 UTC2h 30m
2026-05-21 EJA208 LAX → APC May 21, 14:30 UTCMay 21, 17:50 UTC3h 20m
2026-05-20 N208QS - May 20, 12:35 UTCMay 20, 19:30 UTC6h 55m
2026-05-20 N208QS - May 20, 09:50 UTCMay 20, 11:25 UTC1h 35m
2026-05-14 N208QS - May 14, 10:25 UTCMay 14, 11:50 UTC1h 25m
2026-05-13 N208QS LPL → DUB May 13, 10:50 UTCMay 13, 11:20 UTC30m
2026-05-13 N208QS - May 13, 08:10 UTCMay 13, 09:20 UTC1h 10m
2026-05-12 N208QS - May 12, 05:40 UTCMay 12, 07:30 UTC1h 50m
2026-05-10 EJA208 LAX → APC May 10, 17:15 UTCMay 10, 17:34 UTC20m
2026-05-10 EJA208 LAX → APC May 10, 14:09 UTCMay 10, 16:20 UTC2h 10m
2026-05-07 EJA208 LAX → APC May 7, 21:30 UTCMay 7, 23:24 UTC1h 55m
2026-05-07 EJA208 LAX → APC May 7, 15:35 UTCMay 7, 17:50 UTC2h 15m
2026-05-06 EJA208 LAX → APC May 6, 02:35 UTCMay 6, 03:50 UTC1h 15m
2026-05-06 EJA208 LAX → APC May 6, 00:40 UTCMay 6, 00:50 UTC10m
2026-05-05 EJA208 LAX → APC May 5, 19:25 UTCMay 6, 00:01 UTC4h 35m
2026-05-04 EJA208 LAX → APC May 4, 21:10 UTCMay 5, 01:20 UTC4h 10m
2026-05-04 EJA208 LAX → APC May 4, 17:50 UTCMay 4, 20:10 UTC2h 21m
2026-05-04 EJA208 LAX → APC May 4, 02:19 UTCMay 4, 03:09 UTC50m
2026-05-04 EJA208 LAX → APC May 4, 00:45 UTCMay 4, 01:30 UTC45m
2026-05-03 EJA208 LAX → APC May 3, 22:45 UTCMay 3, 23:39 UTC55m
2026-05-03 EJA208 LAX → APC May 3, 17:24 UTCMay 3, 22:00 UTC4h 35m
2026-05-01 EJA208 LAX → APC May 1, 22:10 UTCMay 1, 23:05 UTC55m
2026-04-30 EJA208 LAX → APC Apr 30, 20:55 UTCApr 30, 22:00 UTC1h 5m
2026-04-29 EJA208 LAX → APC Apr 29, 23:35 UTCApr 30, 04:00 UTC4h 25m
2026-04-29 EJA208 LAX → APC Apr 29, 19:45 UTCApr 29, 20:30 UTC45m
2026-04-28 EJA208 LAX → APC Apr 28, 23:05 UTCApr 29, 00:45 UTC1h 40m
2026-04-28 EJA208 LAX → APC Apr 28, 17:45 UTCApr 28, 18:25 UTC40m
2026-04-28 EJA208 LAX → APC Apr 28, 14:30 UTCApr 28, 16:00 UTC1h 30m
2026-04-27 EJA208 LAX → APC Apr 27, 18:40 UTCApr 27, 20:15 UTC1h 35m
2026-04-27 EJA208 LAX → APC Apr 27, 13:50 UTCApr 27, 17:05 UTC3h 15m
2026-04-12 EJA208 - Apr 12, 17:55 UTCApr 12, 19:00 UTC1h 5m

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 N208QS page for operator, model, and routing details .

Mode-S A1B12A frequently asked

What is Mode-S code A1B12A?
A1B12A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N208QS.
Where is Mode-S A1B12A registered?
Mode-S code A1B12A 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 A1B12A broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1B12A, octal 50330452, decimal 10,596,650.
What flights does A1B12A operate?
Mode-S A1B12A has broadcast 2 distinct callsigns, including EJA208, N208QS.