Apparatus

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sensors Mode-S transponder

A6C1BC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N53402 · CESSNA 172 Skyhawk · operated by ANVAB INC DBA, CONCORD AVIATION SERVICES

Hex
A6C1BC
Octal
51540674
Decimal
10,928,572
Country
US
Tail
N53402
Type
C172
No current signal · last broadcast 16h ago
Flights observed
177
Distinct callsigns
1
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A6C1BC.

Country allocation

The ICAO 24-bit address A6C1BC 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
N53402 - 176 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N53402 - May 29, 12:05 UTCMay 29, 14:10 UTC2h 5m
2026-05-28 N53402 CON → CON May 28, 23:50 UTCMay 29, 00:20 UTC30m
2026-05-28 N53402 - May 28, 23:15 UTCMay 28, 23:40 UTC25m
2026-05-28 N53402 CON → CON May 28, 18:00 UTCMay 28, 18:05 UTC5m
2026-05-28 N53402 CON → CON May 28, 17:45 UTCMay 28, 17:50 UTC5m
2026-05-28 N53402 CON → CON May 28, 17:25 UTCMay 28, 17:40 UTC15m
2026-05-28 N53402 CON → CON May 28, 15:40 UTCMay 28, 16:35 UTC55m
2026-05-28 N53402 CON → CON May 28, 14:20 UTCMay 28, 14:40 UTC20m
2026-05-28 N53402 CON → CON May 28, 13:50 UTCMay 28, 14:05 UTC15m
2026-05-28 N53402 CON → CON May 28, 11:40 UTCMay 28, 12:45 UTC1h 5m
2026-05-27 N53402 CON → CON May 27, 19:50 UTCMay 27, 20:45 UTC55m
2026-05-27 N53402 CON → CON May 27, 18:00 UTCMay 27, 18:40 UTC40m
2026-05-27 N53402 - May 27, 15:40 UTCMay 27, 16:50 UTC1h 10m
2026-05-27 N53402 - May 27, 14:30 UTCMay 27, 14:45 UTC15m
2026-05-27 N53402 CON → CON May 27, 13:40 UTCMay 27, 14:20 UTC40m
2026-05-27 N53402 - May 27, 12:20 UTCMay 27, 12:50 UTC30m
2026-05-27 N53402 - May 27, 11:55 UTCMay 27, 12:10 UTC15m
2026-05-26 N53402 CON → CON May 26, 21:55 UTCMay 26, 22:54 UTC1h 0m
2026-05-26 N53402 - May 26, 19:50 UTCMay 26, 20:54 UTC1h 5m
2026-05-26 N53402 - May 26, 18:45 UTCMay 26, 18:55 UTC10m
2026-05-26 N53402 CON → CON May 26, 17:35 UTCMay 26, 18:30 UTC55m
2026-05-26 N53402 - May 26, 16:40 UTCMay 26, 16:55 UTC15m
2026-05-26 N53402 - May 26, 16:00 UTCMay 26, 16:05 UTC5m
2026-05-26 N53402 - May 26, 15:39 UTCMay 26, 15:54 UTC15m
2026-05-26 N53402 CON → CON May 26, 11:50 UTCMay 26, 12:45 UTC55m
2026-05-25 N53402 - May 25, 23:35 UTCMay 26, 00:24 UTC50m
2026-05-25 N53402 - May 25, 22:15 UTCMay 25, 22:49 UTC35m
2026-05-24 N53402 CON → CON May 24, 14:45 UTCMay 24, 15:20 UTC35m
2026-05-23 - CON → CON May 23, 22:30 UTCMay 23, 22:40 UTC10m
2026-05-23 N53402 - May 23, 21:45 UTCMay 23, 22:25 UTC40m
2026-05-23 N53402 - May 23, 20:40 UTCMay 23, 20:55 UTC15m
2026-05-23 N53402 - May 23, 19:35 UTCMay 23, 20:20 UTC45m
2026-05-23 N53402 - May 23, 15:35 UTCMay 23, 16:20 UTC45m
2026-05-23 N53402 CON → CON May 23, 14:30 UTCMay 23, 14:45 UTC15m
2026-05-23 N53402 CON → CON May 23, 13:45 UTCMay 23, 14:25 UTC40m
2026-05-23 N53402 - May 23, 03:30 UTCMay 23, 03:55 UTC25m
2026-05-23 N53402 - May 23, 01:45 UTCMay 23, 02:20 UTC35m
2026-05-23 N53402 - May 23, 00:25 UTCMay 23, 00:40 UTC15m
2026-05-23 N53402 - May 23, 00:05 UTCMay 23, 00:20 UTC15m
2026-05-22 N53402 - May 22, 23:30 UTCMay 22, 23:35 UTC5m
2026-05-22 N53402 - May 22, 22:10 UTCMay 22, 22:20 UTC10m
2026-05-22 N53402 CON → CON May 22, 21:50 UTCMay 22, 21:55 UTC5m
2026-05-22 N53402 CON → CON May 22, 18:35 UTCMay 22, 18:40 UTC5m
2026-05-22 N53402 - May 22, 14:55 UTCMay 22, 15:10 UTC15m
2026-05-22 N53402 CON → LCI May 22, 12:10 UTCMay 22, 12:35 UTC25m
2026-05-21 N53402 - May 21, 22:40 UTCMay 21, 22:45 UTC5m
2026-05-21 N53402 CON → CON May 21, 21:55 UTCMay 21, 22:35 UTC40m
2026-05-21 N53402 - May 21, 20:25 UTCMay 21, 20:30 UTC5m
2026-05-21 N53402 - May 21, 19:30 UTCMay 21, 20:20 UTC50m
2026-05-21 N53402 CON → CON May 21, 17:30 UTCMay 21, 19:25 UTC1h 55m

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 N53402 page for operator, model, and routing details .

Mode-S A6C1BC frequently asked

What is Mode-S code A6C1BC?
A6C1BC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N53402.
Where is Mode-S A6C1BC registered?
Mode-S code A6C1BC 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 A6C1BC broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6C1BC, octal 51540674, decimal 10,928,572.
What flights does A6C1BC operate?
Mode-S A6C1BC has broadcast 1 distinct callsign, including N53402.