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 1h ago
Flights observed
574
Distinct callsigns
20
Country
US
Last broadcast
1h ago

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 - 11 2026-07-09
UCA4822 - 9 2026-06-27
UCA4276 - 9 2026-07-09
UCA4364 - 8 2026-07-12
UCA4243 - 8 2026-07-14
UCA4813 CommutAir 7 2026-06-22
UCA4299 CommutAir 7 2026-06-19
UCA4272 - 7 2026-07-14
UCA4342 - 6 2026-07-02
UCA4231 - 6 2026-06-27
UCA4980 - 5 2026-07-05
UCA4938 CommutAir 5 2026-05-11
UCA4930 - 5 2026-07-03
UCA4928 - 5 2026-07-06
UCA4889 - 5 2026-07-03
UCA4853 - 5 2026-07-02
UCA4370 - 5 2026-07-12
UCA4361 - 5 2026-06-20
UCA4329 - 5 2026-06-22
UCA4283 - 5 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UCA4266 - Jul 14, 22:20 UTCJul 14, 22:55 UTC34m
2026-07-14 UCA4243 - Jul 14, 20:05 UTCJul 14, 21:05 UTC1h 0m
2026-07-14 UCA4243 GPT → IAH Jul 14, 20:02 UTCJul 14, 21:02 UTC1h 0m
2026-07-14 UCA4272 - Jul 14, 18:25 UTCJul 14, 19:15 UTC50m
2026-07-14 UCA4357 - Jul 14, 15:30 UTCJul 14, 16:40 UTC1h 10m
2026-07-14 UCA4285 - Jul 14, 01:15 UTCJul 14, 02:10 UTC55m
2026-07-13 UCA4893 - Jul 13, 22:45 UTCJul 14, 00:20 UTC1h 35m
2026-07-13 UCA4879 - Jul 13, 19:25 UTCJul 13, 20:45 UTC1h 20m
2026-07-13 UCA4879 IAH → HSV Jul 13, 18:40 UTCJul 13, 20:47 UTC2h 7m
2026-07-13 UCA4269 - Jul 13, 14:20 UTCJul 13, 15:50 UTC1h 30m
2026-07-13 UCA4901 - Jul 13, 03:01 UTCJul 13, 04:30 UTC1h 30m
2026-07-13 UCA4259 - Jul 13, 00:45 UTCJul 13, 01:45 UTC1h 0m
2026-07-12 UCA4364 - Jul 12, 22:40 UTCJul 12, 23:55 UTC1h 15m
2026-07-12 UCA4959 - Jul 12, 19:01 UTCJul 12, 20:05 UTC1h 5m
2026-07-12 UCA4959 GSP → IAD Jul 12, 19:07 UTCJul 12, 20:11 UTC1h 4m
2026-07-12 UCA4962 - Jul 12, 16:55 UTCJul 12, 17:50 UTC55m
2026-07-12 UCA4840 - Jul 12, 14:40 UTCJul 12, 15:40 UTC1h 0m
2026-07-12 UCA4840 SYR → IAD Jul 12, 14:47 UTCJul 12, 15:42 UTC55m
2026-07-12 UCA4370 - Jul 12, 12:50 UTCJul 12, 13:35 UTC45m
2026-07-12 UCA4311 - Jul 12, 10:05 UTCJul 12, 11:15 UTC1h 10m
2026-07-12 UCA4304 - Jul 12, 05:01 UTCJul 12, 06:15 UTC1h 15m
2026-07-12 UCA4304 IAD → TYS Jul 12, 05:03 UTCJul 12, 06:17 UTC1h 14m
2026-07-12 UCA4954 - Jul 12, 02:30 UTCJul 12, 03:15 UTC45m
2026-07-11 UCA4340 - Jul 11, 18:10 UTCJul 11, 19:35 UTC1h 25m
2026-07-11 UCA4340 HSV → IAD Jul 11, 18:09 UTCJul 11, 19:41 UTC1h 32m
2026-07-11 UCA4315 - Jul 11, 15:55 UTCJul 11, 17:20 UTC1h 25m
2026-07-11 UCA4248 - Jul 11, 10:25 UTCJul 11, 11:10 UTC45m
2026-07-11 UCA4248 HRL → IAH Jul 11, 10:22 UTCJul 11, 11:10 UTC48m
2026-07-11 UCA4919 - Jul 11, 02:15 UTCJul 11, 03:01 UTC45m
2026-07-11 UCA4919 IAH → HRL Jul 11, 02:14 UTCJul 11, 03:04 UTC50m
2026-07-10 UCA4247 - Jul 10, 23:30 UTCJul 11, 00:05 UTC35m
2026-07-10 UCA4341 - Jul 10, 21:30 UTCJul 10, 22:10 UTC40m
2026-07-10 UCA4243 - Jul 10, 19:20 UTCJul 10, 20:25 UTC1h 5m
2026-07-10 UCA4272 - Jul 10, 17:15 UTCJul 10, 18:15 UTC1h 0m
2026-07-10 UCA4272 IAH → GPT Jul 10, 17:13 UTCJul 10, 18:11 UTC58m
2026-07-10 UCA4224 - Jul 10, 14:25 UTCJul 10, 15:35 UTC1h 10m
2026-07-10 UCA4839 - Jul 10, 01:45 UTCJul 10, 02:45 UTC1h 0m
2026-07-09 UCA4247 - Jul 9, 23:15 UTCJul 9, 23:55 UTC40m
2026-07-09 UCA4247 CRP → IAH Jul 9, 23:12 UTCJul 9, 23:53 UTC41m
2026-07-09 UCA4341 - Jul 9, 21:45 UTCJul 9, 22:25 UTC40m
2026-07-09 UCA4341 IAH → CRP Jul 9, 21:48 UTCJul 9, 22:37 UTC49m
2026-07-09 UCA4277 PBC → IAH Jul 9, 18:43 UTCJul 9, 20:21 UTC1h 38m
2026-07-09 UCA4277 - Jul 9, 18:40 UTCJul 9, 20:30 UTC1h 50m
2026-07-09 UCA4276 - Jul 9, 15:20 UTCJul 9, 17:10 UTC1h 50m
2026-07-09 UCA4276 IAH → PBC Jul 9, 15:26 UTCJul 9, 17:10 UTC1h 44m
2026-07-09 UCA4837 - Jul 9, 12:20 UTCJul 9, 13:20 UTC1h 0m
2026-07-08 UCA4273 - Jul 8, 20:40 UTCJul 8, 21:35 UTC55m
2026-07-08 UCA4934 - Jul 8, 19:35 UTCJul 8, 19:45 UTC10m
2026-07-08 UCA4921 - Jul 8, 17:40 UTCJul 8, 17:55 UTC15m
2026-07-08 UCA4376 - Jul 8, 14:50 UTCJul 8, 15:45 UTC55m

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 1h ago.
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, UCA4822, UCA4276, UCA4364, UCA4243.