Apparatus

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sensors Mode-S transponder

ABDC91

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N86311 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
ABDC91
Octal
52756221
Decimal
11,263,121
Country
US
Tail
N86311
Type
E75L
Broadcasting now · callsign ASH4010 · 30,000 ft
Flights observed
549
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Current position

ABDC91 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ABDC91 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
ASH4038 Mesa Airlines 8 2026-07-23
ASH6139 Mesa Airlines 7 2026-07-23
ASH4031 - 7 2026-07-19
ASH4016 - 7 2026-07-01
ASH4012 - 7 2026-06-19
ASH6310 - 6 2026-07-03
ASH6173 Mesa Airlines 6 2026-07-22
ASH3993 - 6 2026-06-20
ASH3980 - 6 2026-07-03
ASH6309 - 5 2026-07-22
ASH6295 - 5 2026-07-15
ASH6290 - 5 2026-07-16
ASH6244 Mesa Airlines 5 2026-05-18
ASH6236 Mesa Airlines 5 2026-07-20
ASH6231 - 5 2026-07-09
ASH6211 Mesa Airlines 5 2026-06-17
ASH6186 - 5 2026-07-16
ASH6138 Mesa Airlines 5 2026-07-26
ASH4033 - 5 2026-06-23
ASH4011 - 5 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASH6143 LGA → IAH Jul 26, 19:50 UTCJul 26, 22:15 UTC2h 25m
2026-07-26 ASH3989 GRR → IAH Jul 26, 16:00 UTCJul 26, 17:50 UTC1h 50m
2026-07-26 ASH3989 GRR → IAH Jul 26, 16:04 UTCJul 26, 17:47 UTC1h 43m
2026-07-26 ASH6162 SDF → IAH Jul 26, 12:35 UTCJul 26, 14:15 UTC1h 40m
2026-07-26 ASH6162 SDF → IAH Jul 26, 12:43 UTCJul 26, 14:35 UTC1h 52m
2026-07-26 ASH4026 IAH → DFW Jul 26, 10:20 UTCJul 26, 11:00 UTC40m
2026-07-26 ASH6138 MSY → IAD Jul 26, 01:15 UTCJul 26, 01:55 UTC40m
2026-07-25 ASH4059 MSP → IAH Jul 25, 21:00 UTCJul 25, 23:20 UTC2h 20m
2026-07-25 ASH4059 MSP → IAH Jul 25, 21:15 UTCJul 25, 23:19 UTC2h 4m
2026-07-25 ASH4063 IAD → CLE Jul 25, 17:25 UTCJul 25, 20:00 UTC2h 35m
2026-07-25 ASH4060 OKC → IAH Jul 25, 14:40 UTCJul 25, 15:25 UTC45m
2026-07-25 ASH6157 IAH → TAM Jul 25, 12:35 UTCJul 25, 13:15 UTC40m
2026-07-25 ASH6351 MAF → IAH Jul 25, 10:15 UTCJul 25, 11:20 UTC1h 5m
2026-07-25 ASH6351 MAF → IAH Jul 25, 10:14 UTCJul 25, 11:17 UTC1h 3m
2026-07-25 ASH6276 IAD → CMH Jul 25, 03:05 UTCJul 25, 04:05 UTC1h 0m
2026-07-25 ASH4017 MAF → IAH Jul 25, 00:20 UTCJul 25, 01:20 UTC1h 0m
2026-07-25 ASH4017 MAF → IAH Jul 25, 00:26 UTCJul 25, 01:18 UTC52m
2026-07-24 ASH6233 MAF → IAH Jul 24, 21:50 UTCJul 24, 22:35 UTC45m
2026-07-24 ASH4045 IAD → CLE Jul 24, 18:00 UTCJul 24, 20:10 UTC2h 10m
2026-07-24 ASH6219 LGA → IAH Jul 24, 14:40 UTCJul 24, 16:35 UTC1h 55m
2026-07-24 ASH6303 ELP → IAH Jul 24, 12:10 UTCJul 24, 13:40 UTC1h 30m
2026-07-24 ASH4009 SAT → IAH Jul 24, 01:15 UTCJul 24, 02:30 UTC1h 15m
2026-07-23 ASH4038 IAH → TUL Jul 23, 21:35 UTCJul 23, 23:15 UTC1h 40m
2026-07-23 ASH4038 IAH → TUL Jul 23, 21:15 UTCJul 23, 23:20 UTC2h 5m
2026-07-23 ASH6139 IAH → CVG Jul 23, 17:55 UTCJul 23, 19:50 UTC1h 55m
2026-07-23 ASH6139 IAH → CVG Jul 23, 18:03 UTCJul 23, 19:49 UTC1h 46m
2026-07-23 ASH4007 MAF → IAH Jul 23, 14:05 UTCJul 23, 15:15 UTC1h 10m
2026-07-23 ASH6179 IAH → PHX Jul 23, 02:50 UTCJul 23, 03:50 UTC1h 0m
2026-07-23 ASH6273 IAH → MSP Jul 23, 00:25 UTCJul 23, 01:20 UTC55m
2026-07-22 ASH6173 BDL → IAD Jul 22, 22:30 UTCJul 22, 23:35 UTC1h 5m
2026-07-22 ASH6173 BDL → IAD Jul 22, 22:09 UTCJul 22, 23:25 UTC1h 16m
2026-07-22 ASH4002 IAH → OKC Jul 22, 19:00 UTCJul 22, 20:15 UTC1h 15m
2026-07-22 ASH4002 IAH → OKC Jul 22, 18:50 UTCJul 22, 20:22 UTC1h 32m
2026-07-22 ASH6309 - Jul 22, 16:00 UTCJul 22, 17:15 UTC1h 15m
2026-07-22 ASH6172 IAH → OKC Jul 22, 12:20 UTCJul 22, 13:20 UTC1h 0m
2026-07-22 ASH6172 IAH → OKC Jul 22, 12:31 UTCJul 22, 13:23 UTC52m
2026-07-21 ASH6168 IAH → LGA Jul 21, 23:45 UTCJul 22, 00:25 UTC40m
2026-07-21 ASH3986 IAD → DTW Jul 21, 20:20 UTCJul 21, 22:10 UTC1h 50m
2026-07-21 ASH6345 - Jul 21, 17:25 UTCJul 21, 19:10 UTC1h 45m
2026-07-21 ASH4007 MAF → IAH Jul 21, 14:10 UTCJul 21, 15:25 UTC1h 15m
2026-07-20 ASH3991 IAH → CHS Jul 20, 23:35 UTCJul 21, 00:45 UTC1h 10m
2026-07-20 ASH4004 SDF → IAD Jul 20, 21:40 UTCJul 20, 22:15 UTC35m
2026-07-20 ASH6118 COS → IAH Jul 20, 19:35 UTCJul 20, 20:05 UTC30m
2026-07-20 ASH6236 IAD → LGA Jul 20, 16:00 UTCJul 20, 17:55 UTC1h 55m
2026-07-20 ASH6236 IAD → LGA Jul 20, 16:13 UTCJul 20, 17:55 UTC1h 42m
2026-07-20 ASH3988 IAD → SAV Jul 20, 12:50 UTCJul 20, 15:00 UTC2h 10m
2026-07-20 ASH4028 ELP → IAH Jul 20, 10:25 UTCJul 20, 11:10 UTC45m
2026-07-19 ASH6168 IAH → LGA Jul 19, 23:40 UTCJul 20, 00:20 UTC40m
2026-07-19 ASH4069 - Jul 19, 19:10 UTCJul 19, 21:55 UTC2h 45m
2026-07-19 ASH4069 SLC → IAH Jul 19, 19:20 UTCJul 19, 22:06 UTC2h 46m

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 N86311 page for operator, model, and routing details .

Mode-S ABDC91 frequently asked

What is Mode-S code ABDC91?
ABDC91 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N86311.
Where is Mode-S ABDC91 registered?
Mode-S code ABDC91 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 ABDC91 broadcasting right now?
Yes. Mode-S ABDC91 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABDC91, octal 52756221, decimal 11,263,121.
What flights does ABDC91 operate?
Mode-S ABDC91 has broadcast 20 distinct callsigns, including ASH4038, ASH6139, ASH4031, ASH4016, ASH4012.