Apparatus

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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 1d ago
Flights observed
114
Distinct callsigns
2
Country
US
Last broadcast
1d 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 102 2026-07-26
N208QS - 12 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA208 LAX → APC Jul 26, 22:00 UTCJul 26, 22:30 UTC30m
2026-07-26 EJA208 LAX → APC Jul 26, 18:30 UTCJul 26, 18:55 UTC25m
2026-07-26 EJA208 LAX → APC Jul 26, 16:00 UTCJul 26, 17:00 UTC1h 0m
2026-07-23 N208QS - Jul 23, 11:30 UTCJul 23, 20:15 UTC8h 45m
2026-07-20 N208QS - Jul 20, 10:40 UTCJul 20, 12:50 UTC2h 10m
2026-07-18 N208QS RKV → LTN Jul 18, 19:00 UTCJul 18, 21:10 UTC2h 10m
2026-07-18 N208QS BED → RKV Jul 18, 13:10 UTCJul 18, 17:40 UTC4h 30m
2026-07-17 EJA208 - Jul 17, 11:50 UTCJul 17, 12:15 UTC25m
2026-07-16 EJA208 BED → MVY Jul 16, 19:25 UTCJul 16, 19:55 UTC30m
2026-07-16 EJA208 - Jul 16, 13:10 UTCJul 16, 13:45 UTC35m
2026-07-15 EJA208 - Jul 15, 19:45 UTCJul 15, 22:15 UTC2h 30m
2026-07-15 EJA208 - Jul 15, 18:35 UTCJul 15, 18:55 UTC20m
2026-07-15 EJA208 - Jul 15, 14:10 UTCJul 15, 16:30 UTC2h 20m
2026-07-15 EJA208 - Jul 15, 00:55 UTCJul 15, 05:40 UTC4h 45m
2026-07-13 EJA208 DFW → LAS Jul 13, 23:35 UTCJul 14, 01:55 UTC2h 20m
2026-07-13 EJA208 LAS → DFW Jul 13, 19:25 UTCJul 13, 21:40 UTC2h 15m
2026-07-12 EJA208 TEB → LAS Jul 12, 19:45 UTCJul 13, 00:10 UTC4h 25m
2026-07-10 EJA208 BLM → TEB Jul 10, 23:20 UTCJul 10, 23:45 UTC25m
2026-07-10 EJA208 BOS → BLM Jul 10, 22:00 UTCJul 10, 22:45 UTC45m
2026-07-10 EJA208 - Jul 10, 18:45 UTCJul 10, 19:00 UTC15m
2026-07-10 EJA208 - Jul 10, 15:05 UTCJul 10, 17:55 UTC2h 50m
2026-07-10 EJA208 - Jul 10, 00:50 UTCJul 10, 01:25 UTC35m
2026-07-09 EJA208 - Jul 9, 22:10 UTCJul 10, 00:15 UTC2h 5m
2026-07-09 EJA208 - Jul 9, 20:40 UTCJul 9, 21:05 UTC25m
2026-07-09 EJA208 - Jul 9, 18:30 UTCJul 9, 19:25 UTC55m
2026-07-09 EJA208 JFK → HYA Jul 9, 04:15 UTCJul 9, 04:55 UTC40m
2026-07-09 EJA208 - Jul 9, 01:40 UTCJul 9, 02:15 UTC35m
2026-07-07 EJA208 - Jul 7, 23:15 UTCJul 8, 00:05 UTC50m
2026-07-07 EJA208 - Jul 7, 21:50 UTCJul 7, 22:50 UTC1h 0m
2026-07-07 EJA208 - Jul 7, 14:55 UTCJul 7, 17:25 UTC2h 30m
2026-07-06 EJA208 - Jul 6, 23:35 UTCJul 7, 01:00 UTC1h 25m
2026-07-06 EJA208 - Jul 6, 21:10 UTCJul 6, 22:55 UTC1h 45m
2026-07-06 EJA208 - Jul 6, 17:45 UTCJul 6, 19:55 UTC2h 10m
2026-07-06 EJA208 - Jul 6, 01:15 UTCJul 6, 02:40 UTC1h 25m
2026-07-05 EJA208 - Jul 5, 23:00 UTCJul 5, 23:45 UTC45m
2026-07-05 EJA208 - Jul 5, 17:30 UTCJul 5, 22:00 UTC4h 30m
2026-07-05 EJA208 VNY → LAX Jul 5, 15:55 UTCJul 5, 16:15 UTC20m
2026-07-04 EJA208 BJC → VNY Jul 4, 23:45 UTCJul 5, 01:35 UTC1h 50m
2026-07-04 EJA208 - Jul 4, 20:10 UTCJul 4, 20:20 UTC10m
2026-07-04 EJA208 - Jul 4, 16:00 UTCJul 4, 18:35 UTC2h 35m
2026-07-03 EJA208 LAX → APC Jul 3, 21:00 UTCJul 3, 21:30 UTC30m
2026-07-03 EJA208 LAX → APC Jul 3, 18:20 UTCJul 3, 20:10 UTC1h 50m
2026-07-03 EJA208 LAX → APC Jul 3, 16:20 UTCJul 3, 17:10 UTC50m
2026-07-02 EJA208 LAX → APC Jul 2, 21:05 UTCJul 2, 21:30 UTC25m
2026-07-02 EJA208 LAX → APC Jul 2, 19:50 UTCJul 2, 20:30 UTC40m
2026-07-02 EJA208 LAX → APC Jul 2, 15:00 UTCJul 2, 15:45 UTC45m
2026-07-02 EJA208 LAX → APC Jul 2, 13:45 UTCJul 2, 14:20 UTC35m
2026-07-01 EJA208 LAX → APC Jul 1, 17:30 UTCJul 1, 18:20 UTC50m
2026-06-28 EJA208 LAX → APC Jun 28, 19:34 UTCJun 28, 20:19 UTC45m
2026-06-28 EJA208 LAX → APC Jun 28, 17:55 UTCJun 28, 18:34 UTC40m

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 1d 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.