Apparatus

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sensors Mode-S transponder

A0A9F6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14186 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0A9F6
Octal
50124766
Decimal
10,529,270
Country
US
Tail
N14186
Type
E45X
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
650
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S A0A9F6.

Country allocation

The ICAO 24-bit address A0A9F6 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
UCA4277 - 13 2026-07-15
UCA4276 - 10 2026-07-15
UCA4822 - 9 2026-06-27
UCA4938 - 8 2026-07-23
UCA4364 - 8 2026-07-12
UCA4243 - 8 2026-07-14
UCA4815 CommutAir 7 2026-07-22
UCA4813 CommutAir 7 2026-06-22
UCA4328 CommutAir 7 2026-07-22
UCA4299 CommutAir 7 2026-06-19
UCA4289 - 7 2026-07-17
UCA4272 - 7 2026-07-14
UCA4253 - 7 2026-07-23
UCA4810 CommutAir 6 2026-07-24
UCA4342 - 6 2026-07-02
UCA4281 CommutAir 6 2026-07-26
UCA4247 CommutAir 6 2026-07-26
UCA4231 - 6 2026-06-27
UCA4980 - 5 2026-07-05
UCA4930 - 5 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4959 GSP → IAD Jul 26, 19:05 UTCJul 26, 20:00 UTC55m
2026-07-26 UCA4962 IAD → GSP Jul 26, 17:00 UTCJul 26, 18:05 UTC1h 5m
2026-07-26 UCA4281 IAD → BTV Jul 26, 15:40 UTCJul 26, 16:00 UTC20m
2026-07-26 UCA4281 IAD → BTV Jul 26, 15:40 UTCJul 26, 16:01 UTC21m
2026-07-26 UCA4333 IAD → BDL Jul 26, 13:15 UTCJul 26, 13:30 UTC15m
2026-07-26 UCA4247 PVD → IAD Jul 26, 00:00 UTCJul 26, 00:55 UTC55m
2026-07-25 UCA4267 IAD → PVD Jul 25, 22:00 UTCJul 25, 22:55 UTC55m
2026-07-25 UCA4267 IAD → PVD Jul 25, 21:50 UTCJul 25, 22:55 UTC1h 5m
2026-07-25 UCA4268 MDT → IAD Jul 25, 19:10 UTCJul 25, 19:45 UTC35m
2026-07-25 UCA4372 IAD → MDT Jul 25, 17:20 UTCJul 25, 17:40 UTC20m
2026-07-25 UCA4240 HSV → IAD Jul 25, 13:25 UTCJul 25, 14:55 UTC1h 30m
2026-07-24 UCA4284 GSO → IAD Jul 24, 23:50 UTCJul 25, 01:15 UTC1h 25m
2026-07-24 UCA4905 HSV → IAH Jul 24, 20:10 UTCJul 24, 21:35 UTC1h 25m
2026-07-24 UCA4286 PWM → IAD Jul 24, 17:20 UTCJul 24, 18:50 UTC1h 30m
2026-07-24 UCA4974 MDT → IAD Jul 24, 14:45 UTCJul 24, 15:15 UTC30m
2026-07-24 UCA4986 IAD → MDT Jul 24, 13:00 UTCJul 24, 13:25 UTC25m
2026-07-24 UCA4810 IAH → TYS Jul 24, 00:15 UTCJul 24, 00:50 UTC35m
2026-07-24 UCA4810 IAH → TYS Jul 24, 00:12 UTCJul 24, 00:47 UTC35m
2026-07-23 UCA4308 CRP → IAH Jul 23, 22:05 UTCJul 23, 22:45 UTC40m
2026-07-23 UCA4938 - Jul 23, 19:00 UTCJul 23, 19:30 UTC30m
2026-07-23 UCA4253 IAD → SCE Jul 23, 17:15 UTCJul 23, 17:44 UTC29m
2026-07-23 UCA4253 - Jul 23, 17:15 UTCJul 23, 17:35 UTC20m
2026-07-23 UCA4281 IAD → BTV Jul 23, 14:55 UTCJul 23, 15:15 UTC20m
2026-07-23 UCA4333 IAD → BDL Jul 23, 13:35 UTCJul 23, 13:45 UTC10m
2026-07-23 UCA4359 - Jul 23, 10:10 UTCJul 23, 10:40 UTC30m
2026-07-23 UCA4252 ORF → IAD Jul 23, 03:05 UTCJul 23, 03:25 UTC20m
2026-07-23 UCA4252 ORF → IAD Jul 23, 02:53 UTCJul 23, 03:36 UTC43m
2026-07-23 UCA4810 IAH → TYS Jul 23, 00:15 UTCJul 23, 00:55 UTC40m
2026-07-22 UCA4308 CRP → IAH Jul 22, 22:40 UTCJul 22, 23:15 UTC35m
2026-07-22 UCA4328 IAD → CMH Jul 22, 19:00 UTCJul 22, 19:20 UTC20m
2026-07-22 UCA4815 IAD → CHO Jul 22, 17:30 UTCJul 22, 17:45 UTC15m
2026-07-22 UCA4281 IAD → BTV Jul 22, 14:45 UTCJul 22, 15:00 UTC15m
2026-07-22 UCA4333 IAD → BDL Jul 22, 13:20 UTCJul 22, 13:30 UTC10m
2026-07-22 UCA4333 IAD → BDL Jul 22, 13:17 UTCJul 22, 13:31 UTC14m
2026-07-21 UCA4938 - Jul 21, 21:35 UTCJul 21, 22:15 UTC40m
2026-07-21 UCA4938 SCE → IAD Jul 21, 21:40 UTCJul 21, 22:13 UTC33m
2026-07-21 UCA4253 - Jul 21, 17:20 UTCJul 21, 17:45 UTC25m
2026-07-21 UCA4281 IAD → BTV Jul 21, 15:00 UTCJul 21, 15:25 UTC25m
2026-07-21 UCA4333 IAD → BDL Jul 21, 13:20 UTCJul 21, 13:30 UTC10m
2026-07-21 UCA4810 ORF → IAD Jul 21, 00:15 UTCJul 21, 01:00 UTC45m
2026-07-20 UCA4308 CRP → IAH Jul 20, 22:05 UTCJul 20, 22:45 UTC40m
2026-07-20 UCA4308 CRP → IAH Jul 20, 22:08 UTCJul 20, 22:42 UTC34m
2026-07-20 UCA4959 - Jul 20, 19:05 UTCJul 20, 20:10 UTC1h 5m
2026-07-20 UCA4962 - Jul 20, 16:55 UTCJul 20, 17:50 UTC55m
2026-07-20 UCA4962 IAD → GSP Jul 20, 17:00 UTCJul 20, 17:55 UTC55m
2026-07-20 UCA4834 - Jul 20, 15:00 UTCJul 20, 15:25 UTC25m
2026-07-20 UCA4319 - Jul 20, 13:05 UTCJul 20, 13:30 UTC25m
2026-07-20 UCA4359 - Jul 20, 10:10 UTCJul 20, 10:40 UTC30m
2026-07-20 UCA4252 - Jul 20, 03:00 UTCJul 20, 03:25 UTC25m
2026-07-20 UCA4267 - Jul 20, 00:00 UTCJul 20, 01:00 UTC1h 0m

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 N14186 page for operator, model, and routing details .

Mode-S A0A9F6 frequently asked

What is Mode-S code A0A9F6?
A0A9F6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14186.
Where is Mode-S A0A9F6 registered?
Mode-S code A0A9F6 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 A0A9F6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0A9F6, octal 50124766, decimal 10,529,270.
What flights does A0A9F6 operate?
Mode-S A0A9F6 has broadcast 20 distinct callsigns, including UCA4277, UCA4276, UCA4822, UCA4938, UCA4364.