Apparatus

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sensors Mode-S transponder

AC2BFD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N88346 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC2BFD
Octal
53025775
Decimal
11,283,453
Country
US
Tail
N88346
Type
E75L
No current signal · last broadcast 4h ago
Flights observed
225
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AC2BFD.

Country allocation

The ICAO 24-bit address AC2BFD 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
ASH6226 Mesa Airlines 4 2026-06-08
ASH6153 Mesa Airlines 4 2026-06-03
ASH4064 Mesa Airlines 4 2026-05-14
ASH4039 Mesa Airlines 4 2026-06-04
ASH3983 Mesa Airlines 4 2026-06-10
ASH6271 Mesa Airlines 3 2026-06-07
ASH6224 Mesa Airlines 3 2026-06-10
ASH6190 Mesa Airlines 3 2026-05-14
ASH6182 Mesa Airlines 3 2026-06-11
ASH6165 Mesa Airlines 3 2026-05-28
ASH6147 Mesa Airlines 3 2026-06-09
ASH6146 Mesa Airlines 3 2026-06-04
ASH6136 Mesa Airlines 3 2026-05-30
ASH6135 Mesa Airlines 3 2026-05-13
ASH6127 Mesa Airlines 3 2026-05-20
ASH4054 Mesa Airlines 3 2026-05-29
ASH4051 Mesa Airlines 3 2026-06-06
ASH4027 Mesa Airlines 3 2026-06-09
ASH3994 Mesa Airlines 3 2026-06-11
ASH3235 Mesa Airlines 3 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 ASH6145 - Jun 12, 01:05 UTCJun 12, 02:25 UTC1h 20m
2026-06-12 ASH6145 IAH → ICT Jun 12, 01:08 UTCJun 12, 02:23 UTC1h 15m
2026-06-11 ASH6182 RDU → IAD Jun 11, 21:05 UTCJun 11, 22:31 UTC1h 26m
2026-06-11 ASH6182 RDU → IAD Jun 11, 18:00 UTCJun 11, 22:40 UTC4h 40m
2026-06-11 ASH3994 CHS → IAH Jun 11, 14:10 UTCJun 11, 15:45 UTC1h 35m
2026-06-10 ASH3983 DTW → IAD Jun 10, 22:15 UTCJun 10, 23:50 UTC1h 35m
2026-06-10 ASH3983 DTW → IAD Jun 10, 22:17 UTCJun 10, 23:52 UTC1h 35m
2026-06-10 ASH6264 IAD → MSY Jun 10, 19:45 UTCJun 10, 20:45 UTC1h 0m
2026-06-10 ASH6180 IAD → PWM Jun 10, 17:25 UTCJun 10, 18:25 UTC1h 0m
2026-06-10 ASH6224 LGA → IAH Jun 10, 13:30 UTCJun 10, 15:30 UTC2h 0m
2026-06-10 ASH6224 LGA → IAH Jun 10, 13:36 UTCJun 10, 15:27 UTC1h 51m
2026-06-09 ASH6157 IAH → TAM Jun 9, 22:19 UTCJun 9, 23:47 UTC1h 28m
2026-06-09 ASH6157 IAH → TAM Jun 9, 22:00 UTCJun 9, 23:45 UTC1h 45m
2026-06-09 ASH4027 CLT → IAD Jun 9, 18:20 UTCJun 9, 20:10 UTC1h 50m
2026-06-09 ASH4027 CLT → IAD Jun 9, 18:13 UTCJun 9, 20:16 UTC2h 3m
2026-06-09 ASH6147 IAH → CLE Jun 9, 14:45 UTCJun 9, 17:00 UTC2h 15m
2026-06-09 ASH6147 IAH → CLE Jun 9, 14:50 UTCJun 9, 17:11 UTC2h 21m
2026-06-09 ASH6245 MTY → IAH Jun 9, 11:30 UTCJun 9, 12:35 UTC1h 5m
2026-06-08 ASH6226 IAH → MTY Jun 8, 21:50 UTCJun 8, 23:00 UTC1h 10m
2026-06-08 ASH4028 ELP → IAH Jun 8, 17:00 UTCJun 8, 18:40 UTC1h 40m
2026-06-08 ASH4028 ELP → IAH Jun 8, 16:45 UTCJun 8, 18:41 UTC1h 56m
2026-06-08 ASH6187 IAD → CVG Jun 8, 03:20 UTCJun 8, 05:05 UTC1h 45m
2026-06-08 ASH6187 IAD → CVG Jun 8, 03:18 UTCJun 8, 05:00 UTC1h 42m
2026-06-07 ASH6253 PHX → IAH Jun 7, 22:15 UTCJun 7, 23:25 UTC1h 10m
2026-06-07 ASH6253 PHX → IAH Jun 7, 22:21 UTCJun 7, 23:16 UTC55m
2026-06-07 ASH6189 PHX → IAH Jun 7, 20:00 UTCJun 7, 21:00 UTC1h 0m
2026-06-07 ASH6189 PHX → IAH Jun 7, 19:54 UTCJun 7, 21:00 UTC1h 6m
2026-06-07 ASH4065 BDL → IAD Jun 7, 15:50 UTCJun 7, 18:05 UTC2h 15m
2026-06-07 ASH6271 IAD → BDL Jun 7, 12:30 UTCJun 7, 14:30 UTC2h 0m
2026-06-07 ASH6271 IAD → BDL Jun 7, 12:38 UTCJun 7, 14:33 UTC1h 55m
2026-06-06 ASH6249 RDU → IAH Jun 6, 15:34 UTCJun 6, 21:25 UTC5h 50m
2026-06-06 ASH4051 IAH → MKE Jun 6, 11:39 UTCJun 6, 13:05 UTC1h 25m
2026-06-06 ASH6140 SAT → IAD Jun 6, 00:40 UTCJun 6, 01:55 UTC1h 15m
2026-06-05 ASH6182 RDU → IAD Jun 5, 21:05 UTCJun 5, 22:36 UTC1h 31m
2026-06-05 ASH6181 PNS → IAH Jun 5, 18:15 UTCJun 5, 19:30 UTC1h 15m
2026-06-05 ASH3994 CHS → IAH Jun 5, 14:15 UTCJun 5, 15:55 UTC1h 40m
2026-06-05 ASH4010 OKC → IAH Jun 5, 02:55 UTCJun 5, 04:25 UTC1h 30m
2026-06-04 ASH4032 IAH → DFW Jun 4, 23:05 UTCJun 5, 01:50 UTC2h 45m
2026-06-04 ASH4032 IAH → DFW Jun 4, 23:20 UTCJun 5, 01:44 UTC2h 24m
2026-06-04 ASH6131 IAH → CVG Jun 4, 19:15 UTCJun 4, 21:40 UTC2h 25m
2026-06-04 ASH4039 PHL → IAH Jun 4, 15:50 UTCJun 4, 17:50 UTC2h 0m
2026-06-04 ASH6146 IAH → SDF Jun 4, 13:00 UTCJun 4, 14:45 UTC1h 45m
2026-06-04 ASH6351 MAF → IAH Jun 4, 10:30 UTCJun 4, 11:30 UTC1h 0m
2026-06-04 ASH6351 MAF → IAH Jun 4, 10:14 UTCJun 4, 11:30 UTC1h 16m
2026-06-04 ASH6276 IAD → CMH Jun 4, 03:35 UTCJun 4, 04:45 UTC1h 10m
2026-06-04 ASH4017 MAF → IAH Jun 4, 00:55 UTCJun 4, 02:00 UTC1h 5m
2026-06-03 ASH6233 MAF → IAH Jun 3, 22:35 UTCJun 4, 00:10 UTC1h 35m
2026-06-03 ASH6153 LGA → IAH Jun 3, 19:08 UTCJun 3, 21:04 UTC1h 56m
2026-06-03 ASH6153 LGA → IAH Jun 3, 16:05 UTCJun 3, 21:10 UTC5h 5m
2026-06-03 ASH6237 IAD → CMH Jun 3, 00:35 UTCJun 3, 14:05 UTC13h 30m

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 N88346 page for operator, model, and routing details .

Mode-S AC2BFD frequently asked

What is Mode-S code AC2BFD?
AC2BFD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N88346.
Where is Mode-S AC2BFD registered?
Mode-S code AC2BFD 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 AC2BFD broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC2BFD, octal 53025775, decimal 11,283,453.
What flights does AC2BFD operate?
Mode-S AC2BFD has broadcast 20 distinct callsigns, including ASH6226, ASH6153, ASH4064, ASH4039, ASH3983.