Apparatus

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sensors Mode-S transponder

A0A9B2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14168 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0A9B2
Octal
50124662
Decimal
10,529,202
Country
US
Tail
N14168
Type
E45X
No current signal · last broadcast 3d ago
Flights observed
578
Distinct callsigns
20
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A0A9B2.

Country allocation

The ICAO 24-bit address A0A9B2 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 20 distinct

Callsign Airline Flights Last seen
UCA4945 - 10 2026-06-23
UCA4340 - 10 2026-07-10
UCA4315 - 9 2026-07-10
UCA4338 - 8 2026-07-02
UCA4298 - 8 2026-06-26
UCA4233 - 8 2026-06-25
UCA4959 - 7 2026-06-21
UCA4919 - 7 2026-06-29
UCA4854 CommutAir 7 2026-05-25
UCA4838 - 7 2026-07-06
UCA4812 - 7 2026-07-05
UCA4852 CommutAir 6 2026-05-13
UCA4354 - 6 2026-06-30
UCA4322 CommutAir 6 2026-06-07
UCA4284 - 6 2026-06-16
UCA4263 - 6 2026-06-28
UCA4255 - 6 2026-07-10
UCA4954 - 5 2026-06-23
UCA4911 - 5 2026-07-01
UCA4859 - 5 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 UCA4926 IAD → ALB Jul 10, 22:10 UTCJul 10, 23:05 UTC55m
2026-07-10 UCA4340 - Jul 10, 18:15 UTCJul 10, 19:55 UTC1h 40m
2026-07-10 UCA4315 - Jul 10, 15:25 UTCJul 10, 16:55 UTC1h 30m
2026-07-10 UCA4255 - Jul 10, 11:35 UTCJul 10, 13:00 UTC1h 25m
2026-07-10 UCA4255 ECP → IAH Jul 10, 11:43 UTCJul 10, 13:03 UTC1h 20m
2026-07-10 UCA4343 - Jul 10, 01:10 UTCJul 10, 02:25 UTC1h 15m
2026-07-09 UCA4348 - Jul 9, 22:30 UTCJul 9, 23:20 UTC50m
2026-07-09 UCA4348 JAN → IAH Jul 9, 22:24 UTCJul 9, 23:16 UTC52m
2026-07-09 UCA4814 PVD → IAD Jul 9, 20:05 UTCJul 9, 20:45 UTC40m
2026-07-09 UCA4356 - Jul 9, 17:10 UTCJul 9, 17:50 UTC40m
2026-07-09 UCA4906 - Jul 9, 15:15 UTCJul 9, 15:40 UTC25m
2026-07-09 UCA4844 - Jul 9, 12:10 UTCJul 9, 13:15 UTC1h 5m
2026-07-08 UCA4295 - Jul 8, 23:05 UTCJul 9, 01:10 UTC2h 5m
2026-07-08 UCA4291 - Jul 8, 19:15 UTCJul 8, 20:15 UTC1h 0m
2026-07-08 UCA4291 BUF → IAD Jul 8, 19:20 UTCJul 8, 20:03 UTC43m
2026-07-08 UCA4335 IAD → BUF Jul 8, 17:25 UTCJul 8, 18:15 UTC50m
2026-07-08 UCA4889 - Jul 8, 15:15 UTCJul 8, 16:15 UTC1h 0m
2026-07-08 UCA4889 ALB → IAD Jul 8, 15:06 UTCJul 8, 16:18 UTC1h 12m
2026-07-08 UCA4321 - Jul 8, 02:30 UTCJul 8, 03:25 UTC55m
2026-07-08 UCA4270 - Jul 8, 00:00 UTCJul 8, 00:55 UTC55m
2026-07-07 UCA4823 PVD → IAD Jul 7, 22:20 UTCJul 7, 23:10 UTC50m
2026-07-07 UCA4340 - Jul 7, 18:45 UTCJul 7, 20:15 UTC1h 30m
2026-07-07 UCA4340 HSV → IAD Jul 7, 18:49 UTCJul 7, 20:14 UTC1h 25m
2026-07-07 UCA4315 - Jul 7, 15:50 UTCJul 7, 17:25 UTC1h 35m
2026-07-07 UCA4346 - Jul 7, 12:40 UTCJul 7, 13:35 UTC55m
2026-07-06 UCA4832 - Jul 6, 22:45 UTCJul 6, 23:30 UTC45m
2026-07-06 UCA4838 - Jul 6, 19:50 UTCJul 6, 20:55 UTC1h 5m
2026-07-06 UCA4301 - Jul 6, 17:30 UTCJul 6, 18:40 UTC1h 10m
2026-07-06 UCA4269 - Jul 6, 14:20 UTCJul 6, 15:50 UTC1h 30m
2026-07-06 UCA3264 - Jul 6, 01:25 UTCJul 6, 03:40 UTC2h 15m
2026-07-05 UCA3264 ALB → HSV Jul 5, 23:15 UTCJul 6, 03:31 UTC4h 16m
2026-07-05 UCA4812 - Jul 5, 12:50 UTCJul 5, 13:40 UTC50m
2026-07-05 UCA4311 - Jul 5, 09:55 UTCJul 5, 11:05 UTC1h 10m
2026-07-05 UCA4914 - Jul 5, 01:15 UTCJul 5, 02:15 UTC1h 0m
2026-07-04 UCA4340 - Jul 4, 19:00 UTCJul 4, 19:40 UTC40m
2026-07-04 UCA4340 - Jul 4, 18:00 UTCJul 4, 18:55 UTC55m
2026-07-04 UCA4315 - Jul 4, 15:15 UTCJul 4, 16:40 UTC1h 25m
2026-07-04 UCA4315 IAH → HSV Jul 4, 15:27 UTCJul 4, 16:40 UTC1h 13m
2026-07-04 UCA4255 - Jul 4, 11:35 UTCJul 4, 13:00 UTC1h 25m
2026-07-04 UCA4255 ECP → IAH Jul 4, 11:43 UTCJul 4, 12:58 UTC1h 15m
2026-07-03 UCA4902 - Jul 3, 19:35 UTCJul 3, 20:50 UTC1h 15m
2026-07-03 UCA4822 - Jul 3, 16:30 UTCJul 3, 17:50 UTC1h 20m
2026-07-03 UCA4822 BHM → IAH Jul 3, 16:36 UTCJul 3, 17:45 UTC1h 9m
2026-07-03 UCA4231 - Jul 3, 13:35 UTCJul 3, 14:50 UTC1h 15m
2026-07-02 UCA4290 - Jul 2, 22:05 UTCJul 2, 23:25 UTC1h 20m
2026-07-02 UCA4290 TUL → IAH Jul 2, 22:13 UTCJul 2, 23:21 UTC1h 8m
2026-07-02 UCA4239 - Jul 2, 20:05 UTCJul 2, 21:10 UTC1h 5m
2026-07-02 UCA4338 - Jul 2, 17:05 UTCJul 2, 18:45 UTC1h 40m
2026-07-02 UCA4338 XNA → IAH Jul 2, 17:00 UTCJul 2, 18:37 UTC1h 37m
2026-07-02 UCA4297 - Jul 2, 14:50 UTCJul 2, 16:00 UTC1h 10m

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 N14168 page for operator, model, and routing details .

Mode-S A0A9B2 frequently asked

What is Mode-S code A0A9B2?
A0A9B2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14168.
Where is Mode-S A0A9B2 registered?
Mode-S code A0A9B2 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 A0A9B2 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0A9B2, octal 50124662, decimal 10,529,202.
What flights does A0A9B2 operate?
Mode-S A0A9B2 has broadcast 20 distinct callsigns, including UCA4945, UCA4340, UCA4315, UCA4338, UCA4298.