Apparatus

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sensors Mode-S transponder

AC2BD5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N88331 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC2BD5
Octal
53025725
Decimal
11,283,413
Country
US
Tail
N88331
Type
E75L
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
522
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S AC2BD5.

Country allocation

The ICAO 24-bit address AC2BD5 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
ASH3990 Mesa Airlines 12 2026-07-25
ASH4067 Mesa Airlines 9 2026-07-25
ASH3981 Mesa Airlines 8 2026-07-25
ASH6266 Mesa Airlines 7 2026-06-09
ASH4007 Mesa Airlines 7 2026-06-08
ASH6366 Mesa Airlines 6 2026-07-26
ASH6312 - 6 2026-07-12
ASH6262 Mesa Airlines 6 2026-07-26
ASH6193 Mesa Airlines 6 2026-05-13
ASH6185 Mesa Airlines 6 2026-05-13
ASH6152 Mesa Airlines 6 2026-06-14
ASH6138 - 6 2026-07-04
ASH4063 - 6 2026-07-17
ASH4050 - 6 2026-06-16
ASH4028 Mesa Airlines 6 2026-06-14
ASH3991 Mesa Airlines 6 2026-07-21
ASH6367 - 5 2026-07-12
ASH6353 Mesa Airlines 5 2026-06-14
ASH6260 Mesa Airlines 5 2026-06-13
ASH6219 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASH6159 SDF → IAH Jul 26, 19:00 UTCJul 26, 20:10 UTC1h 10m
2026-07-26 ASH6262 IAD → CMH Jul 26, 16:55 UTCJul 26, 17:51 UTC56m
2026-07-26 ASH6262 IAD → CMH Jul 26, 16:45 UTCJul 26, 17:15 UTC30m
2026-07-26 ASH6366 IAD → JAX Jul 26, 14:00 UTCJul 26, 15:15 UTC1h 15m
2026-07-25 ASH3981 BHM → IAH Jul 25, 21:55 UTCJul 25, 23:10 UTC1h 15m
2026-07-25 ASH4067 IAH → MAF Jul 25, 18:00 UTCJul 25, 19:05 UTC1h 5m
2026-07-25 ASH3990 BNA → IAH Jul 25, 13:50 UTCJul 25, 15:40 UTC1h 50m
2026-07-25 ASH3996 IAH → MCI Jul 25, 00:30 UTCJul 25, 01:30 UTC1h 0m
2026-07-24 ASH6334 IAH → OKC Jul 24, 21:45 UTCJul 24, 22:55 UTC1h 10m
2026-07-24 ASH6281 PHX → IAH Jul 24, 19:25 UTCJul 24, 20:00 UTC35m
2026-07-24 ASH6281 PHX → IAH Jul 24, 19:29 UTCJul 24, 19:59 UTC30m
2026-07-24 ASH6202 LGA → IAH Jul 24, 17:45 UTCJul 24, 18:20 UTC35m
2026-07-24 ASH4003 IAH → MEM Jul 24, 14:15 UTCJul 24, 15:20 UTC1h 5m
2026-07-24 ASH4003 IAH → MEM Jul 24, 14:21 UTCJul 24, 15:20 UTC59m
2026-07-24 ASH6167 IAH → LGA Jul 24, 00:10 UTCJul 24, 01:15 UTC1h 5m
2026-07-23 ASH6259 IAD → DTW Jul 23, 20:15 UTCJul 23, 22:05 UTC1h 50m
2026-07-23 ASH6188 RIC → IAH Jul 23, 17:05 UTCJul 23, 18:55 UTC1h 50m
2026-07-23 ASH6127 IAH → LGA Jul 23, 15:05 UTCJul 23, 16:00 UTC55m
2026-07-23 ASH6170 ORF → IAD Jul 23, 12:45 UTCJul 23, 13:30 UTC45m
2026-07-23 ASH6351 MAF → IAH Jul 23, 10:25 UTCJul 23, 11:25 UTC1h 0m
2026-07-23 ASH6276 IAD → CMH Jul 23, 03:20 UTCJul 23, 04:25 UTC1h 5m
2026-07-22 ASH6261 PWM → IAD Jul 22, 23:05 UTCJul 23, 01:35 UTC2h 30m
2026-07-22 ASH6164 BDL → IAD Jul 22, 19:45 UTCJul 22, 21:55 UTC2h 10m
2026-07-22 ASH6213 - Jul 22, 16:15 UTCJul 22, 17:45 UTC1h 30m
2026-07-22 ASH6214 - Jul 22, 13:30 UTCJul 22, 15:10 UTC1h 40m
2026-07-22 ASH4041 IND → IAD Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-21 ASH3991 IAH → CHS Jul 21, 23:30 UTCJul 22, 00:30 UTC1h 0m
2026-07-21 ASH4046 CLE → IAH Jul 21, 19:55 UTCJul 21, 21:30 UTC1h 35m
2026-07-21 ASH4046 CLE → IAH Jul 21, 20:05 UTCJul 21, 21:30 UTC1h 25m
2026-07-21 ASH6110 HRL → IAH Jul 21, 17:20 UTCJul 21, 19:09 UTC1h 49m
2026-07-21 ASH6110 HRL → IAH Jul 21, 17:55 UTCJul 21, 19:05 UTC1h 10m
2026-07-19 ASH6297 - Jul 19, 23:35 UTCJul 20, 00:35 UTC1h 0m
2026-07-19 ASH6297 TYS → IAD Jul 19, 23:31 UTCJul 20, 00:52 UTC1h 21m
2026-07-19 ASH6211 LGA → IAD Jul 19, 20:30 UTCJul 19, 22:20 UTC1h 50m
2026-07-19 ASH6310 - Jul 19, 01:25 UTCJul 19, 03:10 UTC1h 45m
2026-07-18 ASH3980 ABQ → IAH Jul 18, 22:20 UTCJul 18, 23:40 UTC1h 20m
2026-07-18 ASH3980 ABQ → IAH Jul 18, 22:20 UTCJul 18, 23:41 UTC1h 21m
2026-07-18 ASH6184 - Jul 18, 15:00 UTCJul 18, 15:50 UTC50m
2026-07-18 ASH6184 PIT → IAD Jul 18, 14:46 UTCJul 18, 15:55 UTC1h 9m
2026-07-18 ASH6119 IAD → PIT Jul 18, 13:06 UTCJul 18, 13:44 UTC38m
2026-07-18 ASH6119 IAD → PIT Jul 18, 13:05 UTCJul 18, 13:40 UTC35m
2026-07-18 ASH6279 - Jul 18, 10:15 UTCJul 18, 11:20 UTC1h 5m
2026-07-18 ASH6234 IAD → CLT Jul 18, 02:42 UTCJul 18, 03:51 UTC1h 9m
2026-07-18 ASH6234 - Jul 18, 03:00 UTCJul 18, 03:50 UTC50m
2026-07-18 ASH4078 - Jul 18, 00:10 UTCJul 18, 01:15 UTC1h 5m
2026-07-17 ASH6112 CLT → IAH Jul 17, 22:00 UTCJul 17, 22:55 UTC55m
2026-07-17 ASH6112 CLT → IAH Jul 17, 21:43 UTCJul 17, 22:53 UTC1h 10m
2026-07-17 ASH6203 - Jul 17, 19:45 UTCJul 17, 20:35 UTC50m
2026-07-17 ASH6239 - Jul 17, 17:25 UTCJul 17, 18:19 UTC55m
2026-07-17 ASH4012 - Jul 17, 15:15 UTCJul 17, 16:04 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 N88331 page for operator, model, and routing details .

Mode-S AC2BD5 frequently asked

What is Mode-S code AC2BD5?
AC2BD5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N88331.
Where is Mode-S AC2BD5 registered?
Mode-S code AC2BD5 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 AC2BD5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC2BD5, octal 53025725, decimal 11,283,413.
What flights does AC2BD5 operate?
Mode-S AC2BD5 has broadcast 20 distinct callsigns, including ASH3990, ASH4067, ASH3981, ASH6266, ASH4007.