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sensors Mode-S transponder

AC2C23

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N88359 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC2C23
Octal
53026043
Decimal
11,283,491
Country
US
Tail
N88359
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
613
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AC2C23.

Country allocation

The ICAO 24-bit address AC2C23 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
ASH4023 - 10 2026-07-17
ASH3999 Mesa Airlines 10 2026-06-17
ASH6244 - 9 2026-07-17
ASH6113 - 9 2026-07-02
ASH3987 Mesa Airlines 9 2026-07-02
ASH6226 - 8 2026-07-13
ASH4065 Mesa Airlines 8 2026-07-23
ASH6322 Mesa Airlines 7 2026-06-10
ASH6313 - 7 2026-07-17
ASH6142 Mesa Airlines 7 2026-07-24
ASH6131 - 7 2026-07-19
ASH6294 Mesa Airlines 6 2026-05-18
ASH6276 - 6 2026-07-02
ASH6271 Mesa Airlines 6 2026-07-23
ASH6192 - 6 2026-07-24
ASH6185 - 6 2026-07-19
ASH6175 Mesa Airlines 6 2026-05-18
ASH6126 Mesa Airlines 6 2026-07-21
ASH4077 - 6 2026-07-17
ASH4076 - 6 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASH6176 DFW → IAD Jul 26, 22:10 UTCJul 26, 22:45 UTC35m
2026-07-26 ASH6171 IAD → BDL Jul 26, 19:45 UTCJul 26, 20:50 UTC1h 5m
2026-07-26 ASH6236 IAD → LGA Jul 26, 16:15 UTCJul 26, 18:15 UTC2h 0m
2026-07-26 ASH3988 IAD → SAV Jul 26, 12:45 UTCJul 26, 14:50 UTC2h 5m
2026-07-25 ASH6136 IAD → LGA Jul 25, 17:20 UTCJul 25, 22:40 UTC5h 20m
2026-07-24 ASH6238 AGU → IAH Jul 24, 23:30 UTCJul 25, 14:25 UTC14h 55m
2026-07-24 ASH4046 CLE → IAH Jul 24, 19:35 UTCJul 24, 21:15 UTC1h 40m
2026-07-24 ASH6110 HRL → IAH Jul 24, 17:10 UTCJul 24, 18:10 UTC1h 0m
2026-07-24 ASH4056 - Jul 24, 14:45 UTCJul 24, 15:35 UTC50m
2026-07-24 ASH4076 IAD → CMH Jul 24, 12:55 UTCJul 24, 13:50 UTC55m
2026-07-24 ASH4076 IAD → CMH Jul 24, 12:46 UTCJul 24, 13:45 UTC59m
2026-07-24 ASH6192 - Jul 24, 10:00 UTCJul 24, 11:10 UTC1h 10m
2026-07-24 ASH6142 IND → IAH Jul 24, 02:20 UTCJul 24, 03:20 UTC1h 0m
2026-07-23 ASH6297 MSY → IAD Jul 23, 23:25 UTCJul 24, 00:30 UTC1h 5m
2026-07-23 ASH6297 MSY → IAD Jul 23, 23:31 UTCJul 24, 00:29 UTC58m
2026-07-23 ASH6211 LGA → IAD Jul 23, 20:00 UTCJul 23, 21:45 UTC1h 45m
2026-07-23 ASH4065 BDL → IAD Jul 23, 15:55 UTCJul 23, 18:15 UTC2h 20m
2026-07-23 ASH4065 BDL → IAD Jul 23, 15:58 UTCJul 23, 18:08 UTC2h 10m
2026-07-23 ASH6271 IAD → BDL Jul 23, 12:35 UTCJul 23, 14:40 UTC2h 5m
2026-07-23 ASH4000 IAH → JAX Jul 23, 10:25 UTCJul 23, 11:00 UTC35m
2026-07-23 ASH4000 IAH → JAX Jul 23, 10:31 UTCJul 23, 10:59 UTC28m
2026-07-22 ASH6353 - Jul 22, 23:50 UTCJul 23, 00:35 UTC45m
2026-07-22 ASH4061 - Jul 22, 19:25 UTCJul 22, 20:30 UTC1h 5m
2026-07-22 ASH4061 MAF → IAH Jul 22, 19:28 UTCJul 22, 20:31 UTC1h 3m
2026-07-22 ASH6338 - Jul 22, 17:05 UTCJul 22, 18:00 UTC55m
2026-07-22 ASH6163 - Jul 22, 13:15 UTCJul 22, 14:40 UTC1h 25m
2026-07-22 ASH3983 DTW → IAD Jul 22, 00:20 UTCJul 22, 01:25 UTC1h 5m
2026-07-21 ASH6182 - Jul 21, 21:30 UTCJul 21, 22:50 UTC1h 20m
2026-07-21 ASH6181 - Jul 21, 17:45 UTCJul 21, 18:50 UTC1h 5m
2026-07-21 ASH4029 - Jul 21, 13:50 UTCJul 21, 15:50 UTC2h 0m
2026-07-21 ASH6126 IAD → MCI Jul 21, 01:10 UTCJul 21, 03:00 UTC1h 50m
2026-07-21 ASH6126 IAD → MCI Jul 21, 01:10 UTCJul 21, 02:58 UTC1h 48m
2026-07-20 ASH3994 - Jul 20, 14:25 UTCJul 20, 15:50 UTC1h 25m
2026-07-20 ASH3994 ELP → IAH Jul 20, 14:15 UTCJul 20, 15:47 UTC1h 32m
2026-07-20 ASH4010 - Jul 20, 03:50 UTCJul 20, 05:05 UTC1h 15m
2026-07-20 ASH4032 IAH → DFW Jul 20, 00:10 UTCJul 20, 00:40 UTC30m
2026-07-20 ASH4032 IAH → DFW Jul 20, 00:06 UTCJul 20, 02:30 UTC2h 24m
2026-07-19 ASH6131 - Jul 19, 19:10 UTCJul 19, 21:30 UTC2h 20m
2026-07-19 ASH4039 - Jul 19, 15:55 UTCJul 19, 17:40 UTC1h 45m
2026-07-19 ASH6146 - Jul 19, 12:55 UTCJul 19, 14:40 UTC1h 45m
2026-07-19 ASH6185 - Jul 19, 00:20 UTCJul 19, 00:45 UTC25m
2026-07-19 ASH6185 SAV → IAH Jul 19, 00:15 UTCJul 19, 02:19 UTC2h 4m
2026-07-18 ASH6193 IAD → SAV Jul 18, 22:00 UTCJul 18, 23:25 UTC1h 25m
2026-07-18 ASH6129 - Jul 18, 16:50 UTCJul 18, 18:25 UTC1h 35m
2026-07-18 ASH6125 IAD → TVC Jul 18, 13:32 UTCJul 18, 15:06 UTC1h 34m
2026-07-18 ASH6192 - Jul 18, 09:55 UTCJul 18, 11:00 UTC1h 5m
2026-07-18 ASH6142 IAD → PVD Jul 18, 02:28 UTCJul 18, 03:36 UTC1h 8m
2026-07-18 ASH6142 IAD → PVD Jul 18, 02:35 UTCJul 18, 03:40 UTC1h 6m
2026-07-17 ASH6244 LGA → IAD Jul 17, 23:45 UTCJul 18, 00:35 UTC50m
2026-07-17 ASH4077 IAD → LGA Jul 17, 21:25 UTCJul 17, 22:15 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 N88359 page for operator, model, and routing details .

Mode-S AC2C23 frequently asked

What is Mode-S code AC2C23?
AC2C23 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N88359.
Where is Mode-S AC2C23 registered?
Mode-S code AC2C23 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 AC2C23 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC2C23, octal 53026043, decimal 11,283,491.
What flights does AC2C23 operate?
Mode-S AC2C23 has broadcast 20 distinct callsigns, including ASH4023, ASH3999, ASH6244, ASH6113, ASH3987.