Apparatus

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sensors Mode-S transponder

A0A9AC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14162 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0A9AC
Octal
50124654
Decimal
10,529,196
Country
US
Tail
N14162
Type
E45X
No current signal · last broadcast 37m ago
Flights observed
525
Distinct callsigns
20
Country
US
Last broadcast
37m ago

Last known position

Most recent position reported by Mode-S A0A9AC.

Country allocation

The ICAO 24-bit address A0A9AC 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
UCA4812 CommutAir 6 2026-07-20
UCA4374 CommutAir 6 2026-05-02
UCA4361 CommutAir 6 2026-06-13
UCA4324 - 6 2026-07-21
UCA4289 - 6 2026-07-11
UCA4275 CommutAir 6 2026-07-24
UCA4228 CommutAir 6 2026-06-16
UCA4896 - 5 2026-07-11
UCA4837 - 5 2026-07-05
UCA4357 CommutAir 5 2026-06-16
UCA4352 - 5 2026-07-10
UCA4320 - 5 2026-06-15
UCA4300 - 5 2026-07-10
UCA4299 - 5 2026-07-02
UCA4294 - 5 2026-06-15
UCA4272 - 5 2026-07-17
UCA4260 - 5 2026-07-17
UCA4251 CommutAir 5 2026-07-22
UCA4989 CommutAir 4 2026-07-07
UCA4892 CommutAir 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 UCA4826 IAH → LFT Jul 25, 23:15 UTCJul 26, 00:35 UTC1h 20m
2026-07-25 UCA4934 LCH → IAH Jul 25, 19:20 UTCJul 25, 19:40 UTC20m
2026-07-25 UCA4921 IAH → CRP Jul 25, 17:40 UTCJul 25, 18:00 UTC20m
2026-07-25 UCA4233 HSV → IAH Jul 25, 14:35 UTCJul 25, 15:50 UTC1h 15m
2026-07-25 UCA4279 ORF → IAD Jul 25, 01:00 UTCJul 25, 02:10 UTC1h 10m
2026-07-24 UCA4339 IAD → ROA Jul 24, 22:25 UTCJul 24, 23:55 UTC1h 30m
2026-07-24 UCA4275 CRP → IAH Jul 24, 19:30 UTCJul 24, 20:50 UTC1h 20m
2026-07-24 UCA4830 LIT → IAH Jul 24, 17:15 UTCJul 24, 18:15 UTC1h 0m
2026-07-24 UCA4371 IAD → BDL Jul 24, 15:05 UTCJul 24, 15:45 UTC40m
2026-07-24 UCA4863 IAH → LRD Jul 24, 12:10 UTCJul 24, 13:30 UTC1h 20m
2026-07-24 UCA4863 IAH → LRD Jul 24, 12:19 UTCJul 24, 13:29 UTC1h 10m
2026-07-23 UCA4306 IAH → HRL Jul 23, 22:25 UTCJul 23, 23:30 UTC1h 5m
2026-07-23 UCA4859 LBB → IAH Jul 23, 19:40 UTCJul 23, 20:50 UTC1h 10m
2026-07-23 UCA4354 SYR → IAD Jul 23, 17:25 UTCJul 23, 18:35 UTC1h 10m
2026-07-23 UCA4373 - Jul 23, 14:35 UTCJul 23, 15:40 UTC1h 5m
2026-07-23 UCA4373 GPT → IAH Jul 23, 14:35 UTCJul 23, 15:37 UTC1h 2m
2026-07-23 UCA4337 TUL → IAH Jul 23, 01:25 UTCJul 23, 02:20 UTC55m
2026-07-22 UCA4290 IAD → ORF Jul 22, 22:10 UTCJul 22, 23:25 UTC1h 15m
2026-07-22 UCA4239 - Jul 22, 20:20 UTCJul 22, 21:25 UTC1h 5m
2026-07-22 UCA4909 - Jul 22, 17:30 UTCJul 22, 18:50 UTC1h 20m
2026-07-22 UCA4262 IAD → STL Jul 22, 15:05 UTCJul 22, 16:30 UTC1h 25m
2026-07-22 UCA4251 IAD → BUF Jul 22, 11:10 UTCJul 22, 11:45 UTC35m
2026-07-22 UCA4849 OKC → IAH Jul 22, 03:30 UTCJul 22, 04:10 UTC40m
2026-07-21 UCA4324 - Jul 21, 15:55 UTCJul 21, 16:50 UTC55m
2026-07-21 UCA4236 - Jul 21, 12:35 UTCJul 21, 13:25 UTC50m
2026-07-21 UCA4359 - Jul 21, 10:15 UTCJul 21, 10:40 UTC25m
2026-07-21 UCA4359 SCE → IAD Jul 21, 10:18 UTCJul 21, 10:38 UTC20m
2026-07-21 UCA4252 - Jul 21, 03:15 UTCJul 21, 03:40 UTC25m
2026-07-21 UCA4270 MFE → IAH Jul 21, 00:00 UTCJul 21, 00:50 UTC50m
2026-07-20 UCA4823 IAD → BUF Jul 20, 22:05 UTCJul 20, 22:55 UTC50m
2026-07-20 UCA4823 IAD → BUF Jul 20, 21:53 UTCJul 20, 22:53 UTC1h 0m
2026-07-20 UCA4942 - Jul 20, 19:25 UTCJul 20, 20:25 UTC1h 0m
2026-07-20 UCA4812 IAD → ALB Jul 20, 12:55 UTCJul 20, 13:55 UTC1h 0m
2026-07-20 UCA4251 IAD → BUF Jul 20, 10:20 UTCJul 20, 11:05 UTC45m
2026-07-20 UCA4849 - Jul 20, 02:50 UTCJul 20, 03:35 UTC45m
2026-07-20 UCA4829 IAD → PWM Jul 20, 00:05 UTCJul 20, 01:35 UTC1h 30m
2026-07-20 UCA4829 IAD → PWM Jul 20, 00:03 UTCJul 20, 01:34 UTC1h 31m
2026-07-19 UCA4932 IAD → MHT Jul 19, 21:45 UTCJul 19, 22:55 UTC1h 10m
2026-07-19 UCA4938 - Jul 19, 19:15 UTCJul 19, 19:45 UTC30m
2026-07-19 UCA4253 - Jul 19, 17:25 UTCJul 19, 17:45 UTC20m
2026-07-19 UCA4324 - Jul 19, 14:55 UTCJul 19, 15:45 UTC50m
2026-07-19 UCA4324 MYR → IAD Jul 19, 14:50 UTCJul 19, 15:45 UTC55m
2026-07-19 UCA4236 - Jul 19, 12:35 UTCJul 19, 13:30 UTC55m
2026-07-18 UCA4319 - Jul 18, 23:05 UTCJul 19, 00:05 UTC1h 0m
2026-07-18 UCA4348 IAD → CVG Jul 18, 17:40 UTCJul 18, 19:05 UTC1h 25m
2026-07-18 UCA4348 IAD → CVG Jul 18, 17:40 UTCJul 18, 18:49 UTC1h 9m
2026-07-18 UCA4240 HSV → IAD Jul 18, 14:10 UTCJul 18, 15:45 UTC1h 35m
2026-07-18 UCA4292 - Jul 18, 01:10 UTCJul 18, 02:35 UTC1h 25m
2026-07-17 UCA4984 IAH → AMA Jul 17, 23:20 UTCJul 17, 23:39 UTC20m
2026-07-17 UCA4375 BTR → IAH Jul 17, 21:50 UTCJul 17, 22:10 UTC20m

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 N14162 page for operator, model, and routing details .

Mode-S A0A9AC frequently asked

What is Mode-S code A0A9AC?
A0A9AC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14162.
Where is Mode-S A0A9AC registered?
Mode-S code A0A9AC 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 A0A9AC broadcasting right now?
No active broadcast right now. Last signal was 37m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0A9AC, octal 50124654, decimal 10,529,196.
What flights does A0A9AC operate?
Mode-S A0A9AC has broadcast 20 distinct callsigns, including UCA4812, UCA4374, UCA4361, UCA4324, UCA4289.