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sensors Mode-S transponder

A05AB3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12167 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A05AB3
Octal
50055263
Decimal
10,508,979
Country
US
Tail
N12167
Type
E45X
No current signal · last broadcast Jul 26, 19:30 UTC
Flights observed
688
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:30 UTC

Last known position

Most recent position reported by Mode-S A05AB3.

Country allocation

The ICAO 24-bit address A05AB3 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
UCA4374 - 8 2026-07-14
UCA4307 - 8 2026-07-10
UCA4932 - 7 2026-06-25
UCA4867 - 7 2026-07-14
UCA4852 - 7 2026-07-15
UCA4818 CommutAir 7 2026-07-21
UCA4277 - 7 2026-07-12
UCA4860 CommutAir 6 2026-06-06
UCA4823 CommutAir 6 2026-06-19
UCA4364 CommutAir 6 2026-07-25
UCA4340 CommutAir 6 2026-07-24
UCA4336 CommutAir 6 2026-07-18
UCA4308 CommutAir 6 2026-07-19
UCA4306 - 6 2026-07-07
UCA4283 CommutAir 6 2026-07-21
UCA4276 - 6 2026-07-12
UCA4227 CommutAir 6 2026-06-17
UCA4942 CommutAir 5 2026-07-25
UCA4923 - 5 2026-07-10
UCA4863 - 5 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4268 MDT → IAD Jul 26, 18:55 UTCJul 26, 19:30 UTC35m
2026-07-26 UCA4372 IAD → MDT Jul 26, 17:10 UTCJul 26, 17:40 UTC30m
2026-07-26 UCA4332 ROA → IAD Jul 26, 14:40 UTCJul 26, 15:25 UTC45m
2026-07-26 UCA4332 ROA → IAD Jul 26, 14:44 UTCJul 26, 15:26 UTC42m
2026-07-26 UCA4368 IAD → ROA Jul 26, 12:55 UTCJul 26, 13:35 UTC40m
2026-07-26 UCA4359 IAD → CMH Jul 26, 10:05 UTCJul 26, 10:30 UTC25m
2026-07-26 UCA4252 ORF → IAD Jul 26, 02:53 UTCJul 26, 03:21 UTC28m
2026-07-26 UCA4252 ORF → IAD Jul 26, 02:50 UTCJul 26, 03:15 UTC25m
2026-07-25 UCA4259 IAH → HRL Jul 25, 23:50 UTCJul 26, 01:00 UTC1h 10m
2026-07-25 UCA4364 IAD → CAE Jul 25, 21:44 UTCJul 25, 22:30 UTC46m
2026-07-25 UCA4364 IAD → CAE Jul 25, 21:30 UTCJul 25, 22:25 UTC55m
2026-07-25 UCA4942 ALB → IAD Jul 25, 19:05 UTCJul 25, 20:10 UTC1h 5m
2026-07-25 UCA4317 IAD → ALB Jul 25, 17:15 UTCJul 25, 18:10 UTC55m
2026-07-25 UCA4325 HSV → IAD Jul 25, 14:10 UTCJul 25, 15:30 UTC1h 20m
2026-07-25 UCA4325 HSV → IAD Jul 25, 14:15 UTCJul 25, 15:21 UTC1h 6m
2026-07-24 UCA4914 IAD → TYS Jul 24, 23:53 UTCJul 25, 00:44 UTC51m
2026-07-24 UCA4914 IAD → TYS Jul 24, 23:40 UTCJul 25, 00:40 UTC1h 0m
2026-07-24 UCA4340 HSV → IAD Jul 24, 18:25 UTCJul 24, 19:50 UTC1h 25m
2026-07-24 UCA4340 HSV → IAD Jul 24, 18:09 UTCJul 24, 19:49 UTC1h 40m
2026-07-24 UCA4315 IAH → HSV Jul 24, 15:25 UTCJul 24, 16:45 UTC1h 20m
2026-07-24 UCA4346 IAD → YOW Jul 24, 12:30 UTCJul 24, 13:25 UTC55m
2026-07-24 UCA4309 IAD → CVG Jul 24, 01:50 UTCJul 24, 02:30 UTC40m
2026-07-23 UCA4246 GPT → IAH Jul 23, 22:25 UTCJul 23, 23:35 UTC1h 10m
2026-07-23 UCA4273 IAH → GPT Jul 23, 19:50 UTCJul 23, 20:45 UTC55m
2026-07-23 UCA4851 - Jul 23, 17:00 UTCJul 23, 18:35 UTC1h 35m
2026-07-23 UCA4225 IAH → LCH Jul 23, 14:35 UTCJul 23, 16:00 UTC1h 25m
2026-07-22 UCA4905 HSV → IAH Jul 22, 20:05 UTCJul 22, 21:25 UTC1h 20m
2026-07-22 UCA4286 PWM → IAD Jul 22, 17:30 UTCJul 22, 18:55 UTC1h 25m
2026-07-22 UCA4974 MDT → IAD Jul 22, 14:40 UTCJul 22, 15:10 UTC30m
2026-07-22 UCA4974 MDT → IAD Jul 22, 14:42 UTCJul 22, 15:10 UTC28m
2026-07-22 UCA4986 IAD → MDT Jul 22, 12:56 UTCJul 22, 13:10 UTC14m
2026-07-22 UCA4986 IAD → MDT Jul 22, 12:50 UTCJul 22, 13:15 UTC25m
2026-07-21 UCA4268 - Jul 21, 19:10 UTCJul 21, 19:40 UTC30m
2026-07-21 UCA4372 IAD → MDT Jul 21, 17:25 UTCJul 21, 17:50 UTC25m
2026-07-21 UCA4283 IAD → CMH Jul 21, 14:40 UTCJul 21, 15:55 UTC1h 15m
2026-07-21 UCA4818 ORF → IAD Jul 21, 12:25 UTCJul 21, 13:30 UTC1h 5m
2026-07-21 UCA4342 CHO → IAD Jul 21, 10:50 UTCJul 21, 11:20 UTC30m
2026-07-21 UCA4265 - Jul 21, 03:30 UTCJul 21, 03:45 UTC15m
2026-07-21 UCA4265 IAD → CHO Jul 21, 03:13 UTCJul 21, 03:45 UTC32m
2026-07-21 UCA4882 - Jul 21, 00:05 UTCJul 21, 00:35 UTC30m
2026-07-20 UCA4250 IAD → MDT Jul 20, 21:45 UTCJul 20, 22:10 UTC25m
2026-07-20 UCA4230 AVP → IAD Jul 20, 19:35 UTCJul 20, 20:15 UTC40m
2026-07-20 UCA4234 COD → DEN Jul 20, 17:30 UTCJul 20, 18:00 UTC30m
2026-07-20 UCA4332 ROA → IAD Jul 20, 14:35 UTCJul 20, 15:20 UTC45m
2026-07-20 UCA4368 IAD → ROA Jul 20, 12:55 UTCJul 20, 13:25 UTC30m
2026-07-20 UCA4970 ALB → IAD Jul 20, 10:05 UTCJul 20, 11:10 UTC1h 5m
2026-07-20 UCA4321 IAD → ALB Jul 20, 03:30 UTCJul 20, 04:30 UTC1h 0m
2026-07-20 UCA4810 - Jul 20, 01:40 UTCJul 20, 02:15 UTC35m
2026-07-19 UCA4308 CRP → IAH Jul 19, 23:55 UTCJul 20, 00:30 UTC35m
2026-07-19 UCA4340 HSV → IAD Jul 19, 18:10 UTCJul 19, 19:45 UTC1h 35m

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 N12167 page for operator, model, and routing details .

Mode-S A05AB3 frequently asked

What is Mode-S code A05AB3?
A05AB3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12167.
Where is Mode-S A05AB3 registered?
Mode-S code A05AB3 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 A05AB3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05AB3, octal 50055263, decimal 10,508,979.
What flights does A05AB3 operate?
Mode-S A05AB3 has broadcast 20 distinct callsigns, including UCA4374, UCA4307, UCA4932, UCA4867, UCA4852.