Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0AA1B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14198 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0AA1B
Octal
50125033
Decimal
10,529,307
Country
US
Tail
N14198
Type
E45X
No current signal · last broadcast Jul 26, 17:50 UTC
Flights observed
663
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:50 UTC

Last known position

Most recent position reported by Mode-S A0AA1B.

Country allocation

The ICAO 24-bit address A0AA1B 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
UCA4346 CommutAir 8 2026-06-03
UCA4244 - 7 2026-06-19
UCA4231 CommutAir 7 2026-07-26
UCA4970 CommutAir 6 2026-06-11
UCA4926 CommutAir 6 2026-06-12
UCA4822 CommutAir 6 2026-07-26
UCA4815 CommutAir 6 2026-06-16
UCA4813 CommutAir 6 2026-06-26
UCA4372 - 6 2026-07-12
UCA4329 - 6 2026-06-26
UCA4328 CommutAir 6 2026-06-16
UCA4321 - 6 2026-06-18
UCA4310 CommutAir 6 2026-07-22
UCA4296 - 6 2026-06-19
UCA4275 - 6 2026-07-13
UCA4985 - 5 2026-07-06
UCA4964 - 5 2026-06-19
UCA4917 CommutAir 5 2026-07-25
UCA4882 - 5 2026-07-13
UCA4880 CommutAir 5 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4822 BHM → IAH Jul 26, 16:35 UTCJul 26, 17:50 UTC1h 15m
2026-07-26 UCA4231 SGF → IAH Jul 26, 12:55 UTCJul 26, 14:15 UTC1h 20m
2026-07-26 UCA4231 SGF → IAH Jul 26, 12:53 UTCJul 26, 14:15 UTC1h 22m
2026-07-25 UCA4917 IAH → LRD Jul 25, 11:35 UTCJul 25, 13:00 UTC1h 25m
2026-07-24 UCA4855 IAH → BRO Jul 24, 23:35 UTCJul 25, 00:55 UTC1h 20m
2026-07-24 UCA4345 IAD → ORF Jul 24, 21:20 UTCJul 24, 22:10 UTC50m
2026-07-24 UCA4352 IAD → BDL Jul 24, 19:25 UTCJul 24, 20:10 UTC45m
2026-07-24 UCA4356 LFT → IAH Jul 24, 17:45 UTCJul 24, 18:25 UTC40m
2026-07-24 UCA4906 IAH → LFT Jul 24, 16:10 UTCJul 24, 16:35 UTC25m
2026-07-24 UCA4318 JAN → IAH Jul 24, 12:20 UTCJul 24, 13:10 UTC50m
2026-07-24 UCA4334 IAD → PVD Jul 24, 00:35 UTCJul 24, 01:15 UTC40m
2026-07-23 UCA4905 HSV → IAH Jul 23, 20:05 UTCJul 23, 21:40 UTC1h 35m
2026-07-23 UCA4905 HSV → IAH Jul 23, 19:51 UTCJul 23, 21:36 UTC1h 45m
2026-07-23 UCA4286 PWM → IAD Jul 23, 17:35 UTCJul 23, 19:10 UTC1h 35m
2026-07-23 UCA4286 PWM → IAD Jul 23, 17:08 UTCJul 23, 19:08 UTC2h 0m
2026-07-23 UCA4283 IAD → CMH Jul 23, 14:50 UTCJul 23, 16:15 UTC1h 25m
2026-07-23 UCA4818 ORF → IAD Jul 23, 12:45 UTCJul 23, 13:50 UTC1h 5m
2026-07-23 UCA4922 ROA → IAD Jul 23, 10:20 UTCJul 23, 10:55 UTC35m
2026-07-23 UCA4897 IAD → ROA Jul 23, 03:35 UTCJul 23, 04:10 UTC35m
2026-07-23 UCA4322 IAD → PVD Jul 23, 01:00 UTCJul 23, 02:30 UTC1h 30m
2026-07-22 UCA4310 IAD → BTV Jul 22, 22:45 UTCJul 23, 00:05 UTC1h 20m
2026-07-22 UCA4291 IAD → YUL Jul 22, 19:55 UTCJul 22, 20:45 UTC50m
2026-07-22 UCA4335 IAD → BDL Jul 22, 18:15 UTCJul 22, 19:10 UTC55m
2026-07-22 UCA4283 IAD → CMH Jul 22, 16:05 UTCJul 22, 17:00 UTC55m
2026-07-22 UCA4818 ORF → IAD Jul 22, 13:35 UTCJul 22, 14:45 UTC1h 10m
2026-07-22 UCA3267 IAD → MGM Jul 22, 00:40 UTCJul 22, 01:10 UTC30m
2026-07-21 UCA4812 IAD → ALB Jul 21, 12:50 UTCJul 21, 13:45 UTC55m
2026-07-20 UCA4340 HSV → IAD Jul 20, 18:05 UTCJul 20, 19:35 UTC1h 30m
2026-07-20 UCA4340 HSV → IAD Jul 20, 18:09 UTCJul 20, 19:36 UTC1h 27m
2026-07-20 UCA4315 IAH → HSV Jul 20, 15:25 UTCJul 20, 16:55 UTC1h 30m
2026-07-20 UCA4837 BTR → IAH Jul 20, 12:20 UTCJul 20, 13:25 UTC1h 5m
2026-07-20 UCA4337 TUL → IAH Jul 20, 01:55 UTCJul 20, 03:00 UTC1h 5m
2026-07-19 UCA4984 IAH → AMA Jul 19, 23:20 UTCJul 19, 23:45 UTC25m
2026-07-19 UCA4375 BTR → IAH Jul 19, 21:40 UTCJul 19, 21:55 UTC15m
2026-07-19 UCA4326 IAD → YUL Jul 19, 19:15 UTCJul 19, 20:00 UTC45m
2026-07-19 UCA4336 IAD → PVD Jul 19, 17:15 UTCJul 19, 18:05 UTC50m
2026-07-19 UCA4357 LRD → IAH Jul 19, 14:45 UTCJul 19, 15:40 UTC55m
2026-07-19 UCA4357 - Jul 19, 14:35 UTCJul 19, 15:45 UTC1h 10m
2026-07-19 UCA4892 - Jul 19, 03:05 UTCJul 19, 04:00 UTC55m
2026-07-19 UCA4892 IAH → LRD Jul 19, 03:06 UTCJul 19, 03:56 UTC50m
2026-07-18 UCA4379 - Jul 18, 21:45 UTCJul 18, 22:40 UTC55m
2026-07-18 UCA4366 - Jul 18, 19:45 UTCJul 18, 20:35 UTC50m
2026-07-18 UCA4830 LIT → IAH Jul 18, 17:15 UTCJul 18, 18:15 UTC1h 0m
2026-07-18 UCA4371 IAD → BDL Jul 18, 14:55 UTCJul 18, 15:40 UTC45m
2026-07-18 UCA4255 - Jul 18, 11:35 UTCJul 18, 12:45 UTC1h 10m
2026-07-18 UCA4255 ECP → IAH Jul 18, 11:43 UTCJul 18, 13:03 UTC1h 20m
2026-07-18 UCA4343 - Jul 18, 01:10 UTCJul 18, 02:35 UTC1h 25m
2026-07-17 UCA4923 - Jul 17, 22:10 UTCJul 17, 23:14 UTC1h 5m
2026-07-17 UCA4307 BTV → IAD Jul 17, 20:00 UTCJul 17, 21:00 UTC1h 0m
2026-07-17 UCA4822 - Jul 17, 16:29 UTCJul 17, 17:44 UTC1h 15m

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 N14198 page for operator, model, and routing details .

Mode-S A0AA1B frequently asked

What is Mode-S code A0AA1B?
A0AA1B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14198.
Where is Mode-S A0AA1B registered?
Mode-S code A0AA1B 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 A0AA1B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0AA1B, octal 50125033, decimal 10,529,307.
What flights does A0AA1B operate?
Mode-S A0AA1B has broadcast 20 distinct callsigns, including UCA4346, UCA4244, UCA4231, UCA4970, UCA4926.