Apparatus

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sensors Mode-S transponder

A0A9F8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14188 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0A9F8
Octal
50124770
Decimal
10,529,272
Country
US
Tail
N14188
Type
E45X
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
636
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S A0A9F8.

Country allocation

The ICAO 24-bit address A0A9F8 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
UCA4984 CommutAir 7 2026-06-25
UCA4930 CommutAir 7 2026-07-26
UCA4959 CommutAir 6 2026-05-07
UCA4925 CommutAir 6 2026-07-26
UCA4377 - 6 2026-07-21
UCA4375 - 6 2026-06-25
UCA4358 CommutAir 6 2026-07-23
UCA4319 - 6 2026-07-11
UCA4298 CommutAir 6 2026-07-22
UCA4265 CommutAir 6 2026-07-26
UCA4263 - 6 2026-06-29
UCA4236 CommutAir 6 2026-06-04
UCA4989 - 5 2026-07-15
UCA4889 - 5 2026-07-06
UCA4858 - 5 2026-06-27
UCA4835 CommutAir 5 2026-07-22
UCA4378 CommutAir 5 2026-07-23
UCA4374 - 5 2026-06-14
UCA4348 - 5 2026-07-14
UCA4342 CommutAir 5 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4925 MHT → IAD Jul 26, 18:45 UTCJul 26, 20:05 UTC1h 20m
2026-07-26 UCA4930 IAD → MHT Jul 26, 16:25 UTCJul 26, 17:30 UTC1h 5m
2026-07-26 UCA4974 MDT → IAD Jul 26, 14:40 UTCJul 26, 15:10 UTC30m
2026-07-26 UCA4986 IAD → MDT Jul 26, 12:50 UTCJul 26, 13:15 UTC25m
2026-07-26 UCA4342 CHO → IAD Jul 26, 10:30 UTCJul 26, 10:55 UTC25m
2026-07-26 UCA4265 CVG → IAD Jul 26, 03:05 UTCJul 26, 03:20 UTC15m
2026-07-26 UCA4265 CVG → IAD Jul 26, 02:58 UTCJul 26, 03:22 UTC24m
2026-07-26 UCA4882 IAH → PNS Jul 26, 00:00 UTCJul 26, 00:20 UTC20m
2026-07-25 UCA4250 IAD → MDT Jul 25, 21:50 UTCJul 25, 22:15 UTC25m
2026-07-25 UCA4230 AVP → IAD Jul 25, 19:20 UTCJul 25, 20:00 UTC40m
2026-07-25 UCA4234 COD → DEN Jul 25, 17:30 UTCJul 25, 18:05 UTC35m
2026-07-25 UCA4283 IAD → CMH Jul 25, 14:55 UTCJul 25, 15:55 UTC1h 0m
2026-07-25 UCA4818 ORF → IAD Jul 25, 12:36 UTCJul 25, 13:30 UTC54m
2026-07-25 UCA4818 ORF → IAD Jul 25, 12:30 UTCJul 25, 13:30 UTC1h 0m
2026-07-25 UCA4342 CHO → IAD Jul 25, 10:40 UTCJul 25, 11:00 UTC20m
2026-07-25 UCA4265 CVG → IAD Jul 25, 02:55 UTCJul 25, 03:10 UTC15m
2026-07-25 UCA4882 IAH → PNS Jul 25, 00:05 UTCJul 25, 00:25 UTC20m
2026-07-24 UCA4250 IAD → MDT Jul 24, 22:05 UTCJul 24, 22:35 UTC30m
2026-07-24 UCA4362 ORF → IAD Jul 24, 19:20 UTCJul 24, 20:05 UTC45m
2026-07-24 UCA4360 IAD → SYR Jul 24, 17:15 UTCJul 24, 18:00 UTC45m
2026-07-24 UCA4360 IAD → SYR Jul 24, 17:05 UTCJul 24, 18:15 UTC1h 10m
2026-07-24 UCA4840 IAD → CHO Jul 24, 14:35 UTCJul 24, 15:30 UTC55m
2026-07-24 UCA4370 BTV → IAD Jul 24, 12:45 UTCJul 24, 13:30 UTC45m
2026-07-23 UCA4351 HSV → IAD Jul 23, 23:15 UTCJul 24, 00:55 UTC1h 40m
2026-07-23 UCA4351 HSV → IAD Jul 23, 23:14 UTCJul 24, 00:49 UTC1h 35m
2026-07-23 UCA4946 IAH → HSV Jul 23, 20:20 UTCJul 23, 21:45 UTC1h 25m
2026-07-23 UCA4378 PVD → IAD Jul 23, 17:25 UTCJul 23, 18:45 UTC1h 20m
2026-07-23 UCA4378 PVD → IAD Jul 23, 17:33 UTCJul 23, 18:53 UTC1h 20m
2026-07-23 UCA4358 IAD → PVD Jul 23, 14:55 UTCJul 23, 16:10 UTC1h 15m
2026-07-23 UCA4917 - Jul 23, 11:40 UTCJul 23, 13:05 UTC1h 25m
2026-07-22 UCA4855 IAH → BRO Jul 22, 23:30 UTCJul 23, 00:45 UTC1h 15m
2026-07-22 UCA4835 MFE → IAH Jul 22, 19:20 UTCJul 22, 20:15 UTC55m
2026-07-22 UCA4835 MFE → IAH Jul 22, 19:26 UTCJul 22, 20:14 UTC48m
2026-07-22 UCA4298 PVD → IAD Jul 22, 17:30 UTCJul 22, 18:15 UTC45m
2026-07-22 UCA4357 - Jul 22, 14:35 UTCJul 22, 15:30 UTC55m
2026-07-22 UCA4285 IAH → MFE Jul 22, 00:00 UTCJul 22, 00:50 UTC50m
2026-07-22 UCA4285 IAH → MFE Jul 22, 00:12 UTCJul 22, 00:55 UTC43m
2026-07-21 UCA4377 - Jul 21, 21:10 UTCJul 21, 21:45 UTC35m
2026-07-21 UCA4825 IAD → PVD Jul 21, 19:30 UTCJul 21, 20:05 UTC35m
2026-07-21 UCA4822 BHM → IAH Jul 21, 16:30 UTCJul 21, 17:45 UTC1h 15m
2026-07-21 UCA4822 BHM → IAH Jul 21, 16:36 UTCJul 21, 17:45 UTC1h 9m
2026-07-21 UCA4231 SGF → IAH Jul 21, 12:45 UTCJul 21, 14:05 UTC1h 20m
2026-07-20 UCA4835 MFE → IAH Jul 20, 19:30 UTCJul 20, 20:25 UTC55m
2026-07-20 UCA4298 PVD → IAD Jul 20, 17:25 UTCJul 20, 18:10 UTC45m
2026-07-20 UCA4282 IAD → TYS Jul 20, 14:40 UTCJul 20, 15:25 UTC45m
2026-07-20 UCA4320 - Jul 20, 01:50 UTCJul 20, 02:35 UTC45m
2026-07-19 UCA4339 - Jul 19, 22:30 UTCJul 20, 00:00 UTC1h 30m
2026-07-19 UCA4275 - Jul 19, 19:45 UTCJul 19, 20:55 UTC1h 10m
2026-07-19 UCA4843 - Jul 19, 16:35 UTCJul 19, 18:00 UTC1h 25m
2026-07-19 UCA4843 TYS → IAH Jul 19, 16:33 UTCJul 19, 18:30 UTC1h 57m

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 N14188 page for operator, model, and routing details .

Mode-S A0A9F8 frequently asked

What is Mode-S code A0A9F8?
A0A9F8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14188.
Where is Mode-S A0A9F8 registered?
Mode-S code A0A9F8 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 A0A9F8 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 A0A9F8, octal 50124770, decimal 10,529,272.
What flights does A0A9F8 operate?
Mode-S A0A9F8 has broadcast 20 distinct callsigns, including UCA4984, UCA4930, UCA4959, UCA4925, UCA4377.