Apparatus

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sensors Mode-S transponder

A1BD4D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N211AV · operated by N8191E LLC

Hex
A1BD4D
Octal
50336515
Decimal
10,599,757
Country
US
Tail
N211AV
Type
C172
No current signal · last broadcast 1d ago
Flights observed
97
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A1BD4D.

Country allocation

The ICAO 24-bit address A1BD4D 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 1 distinct

Callsign Airline Flights Last seen
AVL211 - 97 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-21 AVL211 - Jun 21, 18:10 UTCJun 21, 19:50 UTC1h 40m
2026-06-21 AVL211 - Jun 21, 13:24 UTCJun 21, 14:40 UTC1h 15m
2026-06-21 AVL211 - Jun 21, 09:04 UTCJun 21, 11:44 UTC2h 40m
2026-06-20 AVL211 - Jun 20, 20:29 UTCJun 20, 22:54 UTC2h 25m
2026-06-20 AVL211 - Jun 20, 14:59 UTCJun 20, 15:44 UTC45m
2026-06-19 AVL211 - Jun 19, 19:39 UTCJun 19, 21:19 UTC1h 40m
2026-06-19 AVL211 - Jun 19, 16:39 UTCJun 19, 17:49 UTC1h 10m
2026-06-19 AVL211 - Jun 19, 12:19 UTCJun 19, 13:50 UTC1h 30m
2026-06-18 AVL211 - Jun 18, 12:05 UTCJun 18, 12:40 UTC35m
2026-06-17 AVL211 - Jun 17, 22:30 UTCJun 17, 23:45 UTC1h 15m
2026-06-17 AVL211 - Jun 17, 16:00 UTCJun 17, 16:25 UTC25m
2026-06-17 AVL211 - Jun 17, 14:45 UTCJun 17, 15:20 UTC35m
2026-06-17 AVL211 - Jun 17, 12:05 UTCJun 17, 13:30 UTC1h 25m
2026-06-16 AVL211 - Jun 16, 20:55 UTCJun 16, 22:40 UTC1h 45m
2026-06-16 AVL211 - Jun 16, 17:49 UTCJun 16, 19:10 UTC1h 20m
2026-06-16 AVL211 - Jun 16, 16:10 UTCJun 16, 17:00 UTC50m
2026-06-16 AVL211 - Jun 16, 15:09 UTCJun 16, 15:35 UTC25m
2026-06-16 AVL211 - Jun 16, 12:05 UTCJun 16, 14:25 UTC2h 20m
2026-06-15 AVL211 - Jun 15, 16:24 UTCJun 15, 17:45 UTC1h 20m
2026-06-15 AVL211 - Jun 15, 14:24 UTCJun 15, 15:30 UTC1h 5m
2026-06-15 AVL211 - Jun 15, 11:45 UTCJun 15, 12:39 UTC55m
2026-06-14 AVL211 - Jun 14, 21:30 UTCJun 14, 22:15 UTC45m
2026-06-14 AVL211 - Jun 14, 18:15 UTCJun 14, 18:40 UTC25m
2026-06-14 AVL211 - Jun 14, 16:50 UTCJun 14, 17:40 UTC50m
2026-06-14 AVL211 - Jun 14, 14:55 UTCJun 14, 15:15 UTC20m
2026-06-14 AVL211 - Jun 14, 13:20 UTCJun 14, 14:05 UTC45m
2026-06-13 AVL211 - Jun 13, 17:55 UTCJun 13, 18:40 UTC45m
2026-06-13 AVL211 - Jun 13, 16:50 UTCJun 13, 17:05 UTC15m
2026-06-13 AVL211 - Jun 13, 14:30 UTCJun 13, 15:20 UTC50m
2026-06-13 AVL211 - Jun 13, 12:20 UTCJun 13, 12:55 UTC35m
2026-06-13 AVL211 - Jun 13, 02:15 UTCJun 13, 03:20 UTC1h 5m
2026-06-13 AVL211 - Jun 13, 00:45 UTCJun 13, 01:35 UTC50m
2026-06-12 AVL211 - Jun 12, 17:20 UTCJun 12, 18:01 UTC40m
2026-06-12 AVL211 - Jun 12, 13:25 UTCJun 12, 15:05 UTC1h 40m
2026-06-12 AVL211 - Jun 12, 11:20 UTCJun 12, 12:40 UTC1h 20m
2026-06-11 AVL211 - Jun 11, 17:05 UTCJun 11, 18:20 UTC1h 15m
2026-06-11 AVL211 - Jun 11, 14:35 UTCJun 11, 15:35 UTC1h 0m
2026-06-11 AVL211 - Jun 11, 11:50 UTCJun 11, 13:05 UTC1h 15m
2026-06-09 AVL211 - Jun 9, 19:20 UTCJun 9, 20:25 UTC1h 5m
2026-06-09 AVL211 - Jun 9, 14:50 UTCJun 9, 15:45 UTC55m
2026-06-08 AVL211 - Jun 8, 19:05 UTCJun 8, 22:00 UTC2h 55m
2026-06-08 AVL211 - Jun 8, 16:35 UTCJun 8, 17:35 UTC1h 0m
2026-06-07 AVL211 - Jun 7, 22:15 UTCJun 7, 22:25 UTC10m
2026-06-07 AVL211 - Jun 7, 18:05 UTCJun 7, 19:05 UTC1h 0m
2026-06-06 AVL211 - Jun 6, 14:45 UTCJun 6, 17:00 UTC2h 15m
2026-06-06 AVL211 - Jun 6, 13:54 UTCJun 6, 14:14 UTC20m
2026-06-06 AVL211 - Jun 6, 01:05 UTCJun 6, 01:40 UTC35m
2026-06-06 AVL211 - Jun 6, 00:20 UTCJun 6, 00:35 UTC15m
2026-06-05 AVL211 - Jun 5, 17:40 UTCJun 5, 19:10 UTC1h 30m
2026-06-05 AVL211 - Jun 5, 15:05 UTCJun 5, 16:25 UTC1h 20m

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 N211AV page for operator, model, and routing details .

Mode-S A1BD4D frequently asked

What is Mode-S code A1BD4D?
A1BD4D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N211AV.
Where is Mode-S A1BD4D registered?
Mode-S code A1BD4D 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 A1BD4D broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1BD4D, octal 50336515, decimal 10,599,757.
What flights does A1BD4D operate?
Mode-S A1BD4D has broadcast 1 distinct callsign, including AVL211.