Apparatus

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sensors Mode-S transponder

A05A68

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12142 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A05A68
Octal
50055150
Decimal
10,508,904
Country
US
Tail
N12142
Type
E45X
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
653
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S A05A68.

Country allocation

The ICAO 24-bit address A05A68 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
UCA4320 - 9 2026-07-02
UCA4996 CommutAir 7 2026-07-25
UCA4985 - 7 2026-07-13
UCA4911 CommutAir 7 2026-07-25
UCA4264 CommutAir 7 2026-07-24
UCA4984 - 6 2026-07-15
UCA4929 CommutAir 6 2026-05-19
UCA4811 - 6 2026-07-22
UCA4363 CommutAir 6 2026-07-23
UCA4330 - 6 2026-07-13
UCA4317 - 6 2026-07-06
UCA4300 CommutAir 6 2026-07-25
UCA4286 CommutAir 6 2026-06-01
UCA4978 CommutAir 5 2026-07-20
UCA4965 CommutAir 5 2026-06-01
UCA4964 CommutAir 5 2026-05-23
UCA4962 - 5 2026-07-16
UCA4954 - 5 2026-07-17
UCA4945 - 5 2026-07-16
UCA4942 - 5 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4275 CRP → IAH Jul 26, 19:40 UTCJul 26, 20:50 UTC1h 10m
2026-07-26 UCA4258 CVG → IAD Jul 26, 16:55 UTCJul 26, 18:05 UTC1h 10m
2026-07-26 UCA4293 IAH → PNS Jul 26, 13:30 UTCJul 26, 14:40 UTC1h 10m
2026-07-26 UCA4293 IAH → PNS Jul 26, 13:30 UTCJul 26, 14:40 UTC1h 10m
2026-07-25 UCA4996 SGF → IAH Jul 25, 22:30 UTCJul 26, 00:00 UTC1h 30m
2026-07-25 UCA4911 GPT → IAH Jul 25, 20:10 UTCJul 25, 21:30 UTC1h 20m
2026-07-25 UCA4911 GPT → IAH Jul 25, 20:19 UTCJul 25, 21:29 UTC1h 10m
2026-07-25 UCA4300 LBB → IAH Jul 25, 17:00 UTCJul 25, 18:15 UTC1h 15m
2026-07-25 UCA4300 LBB → IAH Jul 25, 17:09 UTCJul 25, 18:14 UTC1h 5m
2026-07-25 UCA4261 IAH → LBB Jul 25, 14:50 UTCJul 25, 15:55 UTC1h 5m
2026-07-25 UCA4346 IAD → YOW Jul 25, 12:35 UTCJul 25, 13:25 UTC50m
2026-07-25 UCA4309 IAD → CVG Jul 25, 01:40 UTCJul 25, 02:25 UTC45m
2026-07-24 UCA4348 JAN → IAH Jul 24, 22:35 UTCJul 24, 23:20 UTC45m
2026-07-24 UCA4300 LBB → IAH Jul 24, 19:55 UTCJul 24, 20:40 UTC45m
2026-07-24 UCA4300 LBB → IAH Jul 24, 17:05 UTCJul 24, 18:25 UTC1h 20m
2026-07-24 UCA4261 IAH → LBB Jul 24, 14:50 UTCJul 24, 16:00 UTC1h 10m
2026-07-24 UCA4264 MLM → IAH Jul 24, 12:45 UTCJul 24, 13:30 UTC45m
2026-07-24 UCA4828 LIT → IAH Jul 24, 03:20 UTCJul 24, 04:05 UTC45m
2026-07-23 UCA4303 PNS → IAH Jul 23, 22:00 UTCJul 23, 23:25 UTC1h 25m
2026-07-23 UCA4869 IAD → BTV Jul 23, 19:30 UTCJul 23, 20:50 UTC1h 20m
2026-07-23 UCA4869 IAD → BTV Jul 23, 19:39 UTCJul 23, 20:45 UTC1h 6m
2026-07-23 UCA4822 BHM → IAH Jul 23, 16:30 UTCJul 23, 17:55 UTC1h 25m
2026-07-23 UCA4231 SGF → IAH Jul 23, 12:55 UTCJul 23, 14:20 UTC1h 25m
2026-07-23 UCA4363 ORF → IAD Jul 23, 01:15 UTCJul 23, 01:55 UTC40m
2026-07-22 UCA4811 - Jul 22, 23:50 UTCJul 23, 00:25 UTC35m
2026-07-22 UCA4299 HSV → IAH Jul 22, 21:20 UTCJul 22, 22:50 UTC1h 30m
2026-07-21 UCA4284 - Jul 21, 23:50 UTCJul 22, 01:20 UTC1h 30m
2026-07-21 UCA4374 LRD → IAH Jul 21, 19:20 UTCJul 21, 20:20 UTC1h 0m
2026-07-21 UCA4904 IAH → LRD Jul 21, 17:30 UTCJul 21, 18:25 UTC55m
2026-07-21 UCA4224 AMA → IAH Jul 21, 14:10 UTCJul 21, 15:30 UTC1h 20m
2026-07-21 UCA4839 - Jul 21, 01:50 UTCJul 21, 02:55 UTC1h 5m
2026-07-21 UCA4839 IAH → AMA Jul 21, 01:52 UTCJul 21, 03:01 UTC1h 9m
2026-07-20 UCA4978 LBB → IAH Jul 20, 21:55 UTCJul 20, 23:05 UTC1h 10m
2026-07-20 UCA4978 LBB → IAH Jul 20, 22:04 UTCJul 20, 23:08 UTC1h 4m
2026-07-20 UCA4280 CMH → IAD Jul 20, 19:55 UTCJul 20, 21:05 UTC1h 10m
2026-07-20 UCA4258 CVG → IAD Jul 20, 16:50 UTCJul 20, 18:05 UTC1h 15m
2026-07-20 UCA4293 IAH → PNS Jul 20, 13:15 UTCJul 20, 14:35 UTC1h 20m
2026-07-19 UCA4996 - Jul 19, 22:20 UTCJul 19, 23:50 UTC1h 30m
2026-07-19 UCA4996 SGF → IAH Jul 19, 22:23 UTCJul 19, 23:31 UTC1h 8m
2026-07-19 UCA4911 - Jul 19, 19:45 UTCJul 19, 21:00 UTC1h 15m
2026-07-19 UCA4356 LFT → IAH Jul 19, 17:30 UTCJul 19, 18:10 UTC40m
2026-07-19 UCA4906 IAH → LFT Jul 19, 15:25 UTCJul 19, 15:55 UTC30m
2026-07-19 UCA4906 IAH → LFT Jul 19, 15:27 UTCJul 19, 16:05 UTC38m
2026-07-19 UCA4844 PWM → IAD Jul 19, 12:15 UTCJul 19, 13:25 UTC1h 10m
2026-07-18 UCA4295 - Jul 18, 23:00 UTCJul 19, 00:55 UTC1h 55m
2026-07-18 UCA4274 IAD → PVD Jul 18, 17:50 UTCJul 18, 17:55 UTC5m
2026-07-18 UCA4274 IAD → PVD Jul 18, 16:15 UTCJul 18, 17:55 UTC1h 40m
2026-07-18 UCA4274 IAD → PVD Jul 18, 16:13 UTCJul 18, 17:35 UTC1h 22m
2026-07-18 UCA4294 IAD → PVD Jul 18, 13:45 UTCJul 18, 14:45 UTC1h 0m
2026-07-18 UCA4922 ROA → IAD Jul 18, 10:25 UTCJul 18, 11:15 UTC50m

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 N12142 page for operator, model, and routing details .

Mode-S A05A68 frequently asked

What is Mode-S code A05A68?
A05A68 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12142.
Where is Mode-S A05A68 registered?
Mode-S code A05A68 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 A05A68 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05A68, octal 50055150, decimal 10,508,904.
What flights does A05A68 operate?
Mode-S A05A68 has broadcast 20 distinct callsigns, including UCA4320, UCA4996, UCA4985, UCA4911, UCA4264.