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sensors Mode-S transponder

AC53A0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N89357 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC53A0
Octal
53051640
Decimal
11,293,600
Country
US
Tail
N89357
Type
E75L
No current signal · last broadcast Jul 26, 21:35 UTC
Flights observed
559
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:35 UTC

Last known position

Most recent position reported by Mode-S AC53A0.

Country allocation

The ICAO 24-bit address AC53A0 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
ASH6251 Mesa Airlines 9 2026-07-26
ASH6263 Mesa Airlines 8 2026-07-17
ASH6113 - 8 2026-06-15
ASH3987 - 8 2026-07-13
ASH6313 Mesa Airlines 7 2026-07-24
ASH6294 Mesa Airlines 7 2026-05-06
ASH6289 - 7 2026-07-09
ASH6260 Mesa Airlines 7 2026-07-17
ASH3998 Mesa Airlines 7 2026-07-26
ASH3985 - 7 2026-07-03
ASH6353 - 6 2026-07-20
ASH6326 - 6 2026-07-08
ASH6245 Mesa Airlines 6 2026-06-08
ASH6210 - 6 2026-06-24
ASH6157 Mesa Airlines 6 2026-07-22
ASH6141 Mesa Airlines 6 2026-05-09
ASH6137 Mesa Airlines 6 2026-07-26
ASH6132 Mesa Airlines 6 2026-07-23
ASH6116 Mesa Airlines 6 2026-07-24
ASH4065 Mesa Airlines 6 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASH6131 IAH → CVG Jul 26, 19:10 UTCJul 26, 21:35 UTC2h 25m
2026-07-26 ASH6251 DTW → IAH Jul 26, 15:00 UTCJul 26, 17:20 UTC2h 20m
2026-07-26 ASH6137 IAD → PVD Jul 26, 12:45 UTCJul 26, 13:50 UTC1h 5m
2026-07-26 ASH6279 SDF → IAD Jul 26, 10:30 UTCJul 26, 11:25 UTC55m
2026-07-26 ASH6279 SDF → IAD Jul 26, 10:30 UTCJul 26, 11:26 UTC56m
2026-07-26 ASH6234 LGA → IAH Jul 26, 02:42 UTCJul 26, 03:28 UTC46m
2026-07-26 ASH6234 LGA → IAH Jul 26, 02:45 UTCJul 26, 03:30 UTC45m
2026-07-26 ASH3998 LBB → IAH Jul 26, 00:00 UTCJul 26, 01:05 UTC1h 5m
2026-07-25 ASH6209 IAD → AUS Jul 25, 21:50 UTCJul 25, 22:40 UTC50m
2026-07-25 ASH6129 PWM → IAD Jul 25, 16:55 UTCJul 25, 18:10 UTC1h 15m
2026-07-25 ASH6125 IAH → LGA Jul 25, 13:10 UTCJul 25, 14:00 UTC50m
2026-07-25 ASH6125 IAH → LGA Jul 25, 13:17 UTCJul 25, 14:48 UTC1h 31m
2026-07-25 ASH6192 CVG → IAD Jul 25, 10:00 UTCJul 25, 11:00 UTC1h 0m
2026-07-25 ASH6142 IND → IAH Jul 25, 02:25 UTCJul 25, 03:25 UTC1h 0m
2026-07-24 ASH6244 IAD → ORF Jul 24, 23:40 UTCJul 25, 00:25 UTC45m
2026-07-24 ASH4077 IAH → ABQ Jul 24, 22:00 UTCJul 24, 22:45 UTC45m
2026-07-24 ASH4023 BHM → IAH Jul 24, 19:10 UTCJul 24, 19:50 UTC40m
2026-07-24 ASH4023 BHM → IAH Jul 24, 19:13 UTCJul 24, 19:49 UTC36m
2026-07-24 ASH6313 IAH → MSY Jul 24, 17:30 UTCJul 24, 18:05 UTC35m
2026-07-24 ASH6242 IAD → SDF Jul 24, 14:55 UTCJul 24, 15:45 UTC50m
2026-07-24 ASH6116 LGA → IAH Jul 24, 12:50 UTCJul 24, 13:35 UTC45m
2026-07-24 ASH3997 IAH → SDF Jul 24, 09:55 UTCJul 24, 11:05 UTC1h 10m
2026-07-24 ASH3997 IAH → SDF Jul 24, 09:52 UTCJul 24, 11:03 UTC1h 11m
2026-07-23 ASH6132 IAD → MSP Jul 23, 22:00 UTCJul 23, 23:50 UTC1h 50m
2026-07-23 ASH6132 IAD → MSP Jul 23, 21:54 UTCJul 23, 23:45 UTC1h 51m
2026-07-23 ASH4027 CLT → IAD Jul 23, 18:45 UTCJul 23, 20:35 UTC1h 50m
2026-07-23 AH6147 TIN → ALG Jul 23, 15:05 UTCJul 23, 17:05 UTC2h 0m
2026-07-23 ASH6283 IAH → ATL Jul 23, 11:25 UTCJul 23, 12:55 UTC1h 30m
2026-07-23 ASH6187 IAD → CVG Jul 23, 02:15 UTCJul 23, 03:55 UTC1h 40m
2026-07-22 ASH4074 IAH → MKE Jul 22, 21:15 UTCJul 22, 23:30 UTC2h 15m
2026-07-22 ASH4074 IAH → MKE Jul 22, 21:19 UTCJul 22, 23:31 UTC2h 12m
2026-07-22 ASH4072 IAD → SDF Jul 22, 17:35 UTCJul 22, 19:50 UTC2h 15m
2026-07-22 ASH4060 OKC → IAH Jul 22, 14:35 UTCJul 22, 15:20 UTC45m
2026-07-22 ASH6157 IAH → TAM Jul 22, 12:40 UTCJul 22, 13:20 UTC40m
2026-07-22 ASH6276 IAD → CMH Jul 22, 03:20 UTCJul 22, 04:20 UTC1h 0m
2026-07-22 ASH4017 MAF → IAH Jul 22, 00:20 UTCJul 22, 01:30 UTC1h 10m
2026-07-21 ASH6233 MAF → IAH Jul 21, 21:55 UTCJul 21, 22:50 UTC55m
2026-07-21 ASH6151 IAH → LGA Jul 21, 18:25 UTCJul 21, 20:20 UTC1h 55m
2026-07-21 ASH3982 BTR → IAH Jul 21, 15:15 UTCJul 21, 17:05 UTC1h 50m
2026-07-21 ASH4053 IAH → BWI Jul 21, 12:20 UTCJul 21, 13:00 UTC40m
2026-07-20 ASH6353 - Jul 20, 23:30 UTCJul 21, 00:10 UTC39m
2026-07-20 ASH6353 IAH → LFT Jul 20, 23:37 UTCJul 21, 00:10 UTC33m
2026-07-20 ASH4046 CLE → IAH Jul 20, 19:40 UTCJul 20, 21:15 UTC1h 35m
2026-07-20 ASH4046 CLE → IAH Jul 20, 19:39 UTCJul 20, 21:12 UTC1h 33m
2026-07-20 ASH6110 HRL → IAH Jul 20, 17:10 UTCJul 20, 18:10 UTC1h 0m
2026-07-20 ASH6235 - Jul 20, 15:00 UTCJul 20, 15:40 UTC40m
2026-07-20 ASH6235 PHL → PHL Jul 20, 14:45 UTCJul 20, 14:50 UTC5m
2026-07-20 ASH4015 - Jul 20, 13:10 UTCJul 20, 13:45 UTC35m
2026-07-20 ASH4015 IAD → PHL Jul 20, 12:56 UTCJul 20, 13:43 UTC47m
2026-07-20 ASH6279 - Jul 20, 10:15 UTCJul 20, 11:10 UTC55m

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 N89357 page for operator, model, and routing details .

Mode-S AC53A0 frequently asked

What is Mode-S code AC53A0?
AC53A0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N89357.
Where is Mode-S AC53A0 registered?
Mode-S code AC53A0 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 AC53A0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC53A0, octal 53051640, decimal 11,293,600.
What flights does AC53A0 operate?
Mode-S AC53A0 has broadcast 20 distinct callsigns, including ASH6251, ASH6263, ASH6113, ASH3987, ASH6313.