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sensors Mode-S transponder

AC2BD9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N88335 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC2BD9
Octal
53025731
Decimal
11,283,417
Country
US
Tail
N88335
Type
E75L
No current signal · last broadcast Jul 24, 23:20 UTC
Flights observed
372
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 23:20 UTC

Last known position

Most recent position reported by Mode-S AC2BD9.

Country allocation

The ICAO 24-bit address AC2BD9 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
ASH6338 - 7 2026-06-17
ASH6254 - 6 2026-06-27
ASH6237 - 6 2026-06-23
ASH6189 Mesa Airlines 6 2026-07-22
ASH6148 Mesa Airlines 6 2026-06-14
ASH4041 Mesa Airlines 6 2026-07-21
ASH4010 - 6 2026-07-01
ASH6355 - 5 2026-06-27
ASH6303 - 5 2026-06-21
ASH6296 Mesa Airlines 5 2026-06-14
ASH6238 - 5 2026-06-24
ASH6142 - 5 2026-06-30
ASH3235 - 5 2026-07-18
ASH6288 - 4 2026-06-16
ASH6253 Mesa Airlines 4 2026-07-22
ASH6252 Mesa Airlines 4 2026-05-08
ASH6251 - 4 2026-06-22
ASH6232 - 4 2026-06-23
ASH6211 - 4 2026-07-05
ASH6203 - 4 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 ASH6215 IAH → MKE Jul 24, 21:55 UTCJul 24, 23:20 UTC1h 25m
2026-07-24 ASH6205 PWM → IAD Jul 24, 18:15 UTCJul 24, 19:20 UTC1h 5m
2026-07-24 ASH6205 PWM → IAD Jul 24, 18:22 UTCJul 24, 20:08 UTC1h 46m
2026-07-24 ASH6199 LGA → IAH Jul 24, 11:13 UTCJul 24, 12:55 UTC1h 42m
2026-07-24 ASH6372 IAH → BJX Jul 24, 00:15 UTCJul 24, 13:00 UTC12h 45m
2026-07-23 ASH3992 - Jul 23, 20:25 UTCJul 23, 22:05 UTC1h 40m
2026-07-23 ASH4079 IAH → COS Jul 23, 17:15 UTCJul 23, 18:55 UTC1h 40m
2026-07-23 ASH3994 - Jul 23, 14:20 UTCJul 23, 15:45 UTC1h 25m
2026-07-23 ASH4009 SAT → IAH Jul 23, 01:10 UTCJul 23, 02:20 UTC1h 10m
2026-07-22 ASH6253 PHX → IAH Jul 22, 22:10 UTCJul 22, 23:20 UTC1h 10m
2026-07-22 ASH6189 PHX → IAH Jul 22, 19:55 UTCJul 22, 20:55 UTC1h 0m
2026-07-22 ASH6125 IAH → LGA Jul 22, 17:10 UTCJul 22, 18:05 UTC55m
2026-07-22 ASH4070 - Jul 22, 15:05 UTCJul 22, 15:55 UTC50m
2026-07-22 ASH4006 - Jul 22, 11:10 UTCJul 22, 12:45 UTC1h 35m
2026-07-22 ASH4006 CVG → IAH Jul 22, 10:57 UTCJul 22, 12:43 UTC1h 46m
2026-07-22 ASH4075 IAH → GSP Jul 22, 01:40 UTCJul 22, 03:40 UTC2h 0m
2026-07-21 ASH6253 PHX → IAH Jul 21, 22:15 UTCJul 21, 23:25 UTC1h 10m
2026-07-21 ASH6189 PHX → IAH Jul 21, 19:45 UTCJul 21, 20:45 UTC1h 0m
2026-07-21 ASH4065 BDL → IAD Jul 21, 16:05 UTCJul 21, 18:15 UTC2h 10m
2026-07-21 ASH6271 - Jul 21, 12:30 UTCJul 21, 14:55 UTC2h 25m
2026-07-21 ASH4041 IND → IAD Jul 21, 10:10 UTCJul 21, 11:25 UTC1h 15m
2026-07-21 ASH6179 IAH → PHX Jul 21, 03:00 UTCJul 21, 04:05 UTC1h 5m
2026-07-21 ASH6250 PNS → IAH Jul 21, 00:05 UTCJul 21, 01:20 UTC1h 15m
2026-07-20 ASH6158 DFW → IAH Jul 20, 21:40 UTCJul 20, 22:55 UTC1h 15m
2026-07-20 ASH3985 IAD → ATL Jul 20, 19:30 UTCJul 20, 20:15 UTC45m
2026-07-20 ASH4024 - Jul 20, 17:25 UTCJul 20, 18:10 UTC45m
2026-07-20 ASH4024 IAH → DFW Jul 20, 17:27 UTCJul 20, 18:06 UTC39m
2026-07-20 ASH4029 - Jul 20, 13:40 UTCJul 20, 15:40 UTC2h 0m
2026-07-20 ASH6126 IAD → MCI Jul 20, 01:25 UTCJul 20, 03:15 UTC1h 50m
2026-07-20 ASH6126 IAD → MCI Jul 20, 01:19 UTCJul 20, 03:08 UTC1h 49m
2026-07-19 ASH6182 - Jul 19, 17:55 UTCJul 19, 22:35 UTC4h 40m
2026-07-18 ASH3235 - Jul 18, 16:15 UTCJul 18, 17:35 UTC1h 20m
2026-07-18 ASH3235 SLN → IAH Jul 18, 15:43 UTCJul 18, 17:34 UTC1h 51m
2026-07-08 ASH3234 - Jul 8, 12:00 UTCJul 8, 13:25 UTC1h 25m
2026-07-07 ASH4046 - Jul 7, 23:55 UTCJul 8, 02:10 UTC2h 15m
2026-07-07 ASH6110 - Jul 7, 21:50 UTCJul 7, 22:55 UTC1h 5m
2026-07-07 ASH6366 - Jul 7, 14:05 UTCJul 7, 15:15 UTC1h 10m
2026-07-07 ASH6366 SAV → IAD Jul 7, 14:06 UTCJul 7, 15:20 UTC1h 14m
2026-07-06 ASH3981 IAD → SAV Jul 6, 23:45 UTCJul 7, 01:30 UTC1h 45m
2026-07-06 ASH6203 - Jul 6, 19:10 UTCJul 6, 20:00 UTC50m
2026-07-06 ASH6203 CLT → IAD Jul 6, 19:16 UTCJul 6, 20:05 UTC49m
2026-07-06 ASH6239 - Jul 6, 17:00 UTCJul 6, 17:55 UTC55m
2026-07-06 ASH6184 - Jul 6, 15:10 UTCJul 6, 15:50 UTC40m
2026-07-06 ASH6119 LGA → IAH Jul 6, 13:10 UTCJul 6, 13:50 UTC40m
2026-07-05 ASH6297 - Jul 5, 23:30 UTCJul 6, 00:40 UTC1h 10m
2026-07-05 ASH6297 TYS → IAD Jul 5, 23:31 UTCJul 6, 00:41 UTC1h 10m
2026-07-05 ASH6211 - Jul 5, 19:55 UTCJul 5, 21:45 UTC1h 50m
2026-07-05 ASH6211 IAH → TYS Jul 5, 20:04 UTCJul 5, 21:39 UTC1h 35m
2026-07-05 ASH6125 - Jul 5, 17:20 UTCJul 5, 18:20 UTC1h 0m
2026-07-05 ASH6125 MFE → IAH Jul 5, 17:24 UTCJul 5, 18:17 UTC53m

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 N88335 page for operator, model, and routing details .

Mode-S AC2BD9 frequently asked

What is Mode-S code AC2BD9?
AC2BD9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N88335.
Where is Mode-S AC2BD9 registered?
Mode-S code AC2BD9 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 AC2BD9 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 23:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC2BD9, octal 53025731, decimal 11,283,417.
What flights does AC2BD9 operate?
Mode-S AC2BD9 has broadcast 20 distinct callsigns, including ASH6338, ASH6254, ASH6237, ASH6189, ASH6148.