Apparatus

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sensors Mode-S transponder

A05B1A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12195 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A05B1A
Octal
50055432
Decimal
10,509,082
Country
US
Tail
N12195
Type
E45X
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
446
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S A05B1A.

Country allocation

The ICAO 24-bit address A05B1A 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
UCA4914 - 6 2026-07-12
UCA4238 CommutAir 6 2026-07-23
UCA4909 CommutAir 5 2026-05-27
UCA4875 CommutAir 5 2026-05-14
UCA4840 CommutAir 5 2026-07-19
UCA4370 CommutAir 5 2026-07-19
UCA4359 CommutAir 5 2026-07-24
UCA4325 - 5 2026-07-12
UCA4297 - 5 2026-06-25
UCA4264 - 5 2026-06-25
UCA4262 CommutAir 5 2026-05-27
UCA4252 CommutAir 5 2026-07-24
UCA4236 CommutAir 5 2026-07-24
UCA4233 CommutAir 5 2026-05-22
UCA4946 - 4 2026-07-21
UCA4938 CommutAir 4 2026-07-24
UCA4929 CommutAir 4 2026-05-30
UCA4916 CommutAir 4 2026-05-14
UCA4853 - 4 2026-07-08
UCA4812 CommutAir 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4905 HSV → IAH Jul 26, 20:00 UTCJul 26, 21:20 UTC1h 20m
2026-07-26 UCA4286 PWM → IAD Jul 26, 17:15 UTCJul 26, 18:40 UTC1h 25m
2026-07-26 UCA4367 PHL → IAD Jul 26, 14:45 UTCJul 26, 16:00 UTC1h 15m
2026-07-26 UCA4229 XNA → IAH Jul 26, 12:36 UTCJul 26, 13:37 UTC1h 1m
2026-07-26 UCA4229 XNA → IAH Jul 26, 12:40 UTCJul 26, 13:35 UTC55m
2026-07-26 UCA4970 ALB → IAD Jul 26, 10:20 UTCJul 26, 11:15 UTC55m
2026-07-26 UCA4321 IAD → ALB Jul 26, 03:20 UTCJul 26, 04:15 UTC55m
2026-07-25 UCA4235 ALB → IAD Jul 25, 23:40 UTCJul 26, 00:40 UTC1h 0m
2026-07-25 UCA4812 IAD → ALB Jul 25, 12:55 UTCJul 25, 13:40 UTC45m
2026-07-25 UCA4311 IAD → CVG Jul 25, 09:55 UTCJul 25, 11:05 UTC1h 10m
2026-07-25 UCA4304 IAD → PHL Jul 25, 02:30 UTCJul 25, 03:35 UTC1h 5m
2026-07-25 UCA4304 IAD → PHL Jul 25, 02:28 UTCJul 25, 03:41 UTC1h 13m
2026-07-24 UCA4267 IAD → PVD Jul 24, 23:55 UTCJul 25, 00:55 UTC1h 0m
2026-07-24 UCA4274 IAD → PVD Jul 24, 21:38 UTCJul 24, 22:32 UTC54m
2026-07-24 UCA4274 IAD → PVD Jul 24, 21:20 UTCJul 24, 22:35 UTC1h 15m
2026-07-24 UCA4938 SCE → IAD Jul 24, 19:05 UTCJul 24, 19:30 UTC25m
2026-07-24 UCA4253 DEN → SGF Jul 24, 17:05 UTCJul 24, 17:25 UTC20m
2026-07-24 UCA4324 IAD → BTV Jul 24, 14:45 UTCJul 24, 15:35 UTC50m
2026-07-24 UCA4236 IAD → RIC Jul 24, 12:30 UTCJul 24, 13:25 UTC55m
2026-07-24 UCA4359 IAD → CMH Jul 24, 10:10 UTCJul 24, 10:35 UTC25m
2026-07-24 UCA4252 ORF → IAD Jul 24, 03:10 UTCJul 24, 03:35 UTC25m
2026-07-23 UCA4238 IAD → BTV Jul 23, 23:45 UTCJul 24, 01:00 UTC1h 15m
2026-07-23 UCA4238 IAD → BTV Jul 23, 23:57 UTCJul 24, 01:00 UTC1h 3m
2026-07-23 UCA4302 DEN → XNA Jul 23, 21:40 UTCJul 23, 22:45 UTC1h 5m
2026-07-23 UCA4328 IAD → CMH Jul 23, 19:00 UTCJul 23, 19:20 UTC20m
2026-07-23 UCA4815 IAD → CHO Jul 23, 17:25 UTCJul 23, 17:40 UTC15m
2026-07-23 UCA4834 PWM → IAD Jul 23, 14:55 UTCJul 23, 15:25 UTC30m
2026-07-23 UCA4319 - Jul 23, 13:15 UTCJul 23, 13:40 UTC25m
2026-07-23 UCA4244 OKC → IAH Jul 23, 10:25 UTCJul 23, 10:55 UTC30m
2026-07-23 UCA4964 IAD → MDT Jul 23, 02:45 UTCJul 23, 03:10 UTC25m
2026-07-22 UCA4235 ALB → IAD Jul 22, 23:40 UTCJul 23, 00:50 UTC1h 10m
2026-07-22 UCA4812 IAD → ALB Jul 22, 16:10 UTCJul 22, 17:05 UTC55m
2026-07-22 UCA4240 HSV → IAD Jul 22, 13:30 UTCJul 22, 14:50 UTC1h 20m
2026-07-21 UCA4946 - Jul 21, 20:50 UTCJul 21, 22:25 UTC1h 35m
2026-07-21 UCA4331 IAD → CMH Jul 21, 14:40 UTCJul 21, 15:20 UTC40m
2026-07-21 UCA4331 IAD → CMH Jul 21, 14:45 UTCJul 21, 15:18 UTC33m
2026-07-20 UCA4266 - Jul 20, 22:20 UTCJul 20, 22:55 UTC35m
2026-07-20 UCA4859 LBB → IAH Jul 20, 19:40 UTCJul 20, 20:55 UTC1h 15m
2026-07-20 UCA4354 SYR → IAD Jul 20, 17:20 UTCJul 20, 18:25 UTC1h 5m
2026-07-20 UCA4989 MOB → IAH Jul 20, 14:05 UTCJul 20, 15:10 UTC1h 5m
2026-07-19 UCA4295 - Jul 19, 23:15 UTCJul 20, 01:10 UTC1h 55m
2026-07-19 UCA4362 - Jul 19, 19:25 UTCJul 19, 20:25 UTC1h 0m
2026-07-19 UCA4360 IAD → SYR Jul 19, 17:30 UTCJul 19, 18:15 UTC45m
2026-07-19 UCA4360 IAD → SYR Jul 19, 17:20 UTCJul 19, 18:17 UTC57m
2026-07-19 UCA4840 IAD → CHO Jul 19, 14:40 UTCJul 19, 15:35 UTC55m
2026-07-19 UCA4370 BTV → IAD Jul 19, 12:50 UTCJul 19, 13:35 UTC45m
2026-07-18 UCA3262 IAD → PWM Jul 18, 15:20 UTCJul 18, 16:05 UTC45m
2026-07-17 UCA4236 - Jul 17, 12:50 UTCJul 17, 13:45 UTC55m
2026-07-17 UCA4359 - Jul 17, 10:15 UTCJul 17, 10:44 UTC30m
2026-07-17 UCA4252 - Jul 17, 02:59 UTCJul 17, 03:25 UTC25m

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 N12195 page for operator, model, and routing details .

Mode-S A05B1A frequently asked

What is Mode-S code A05B1A?
A05B1A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12195.
Where is Mode-S A05B1A registered?
Mode-S code A05B1A 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 A05B1A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05B1A, octal 50055432, decimal 10,509,082.
What flights does A05B1A operate?
Mode-S A05B1A has broadcast 20 distinct callsigns, including UCA4914, UCA4238, UCA4909, UCA4875, UCA4840.