Apparatus

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sensors Mode-S transponder

A54C49

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N440TC · operated by TEXAS STATE TECHNICAL COLLEGE

Hex
A54C49
Octal
51246111
Decimal
10,832,969
Country
US
Tail
N440TC
Type
P28A
Broadcasting now · callsign N440TC · 4,450 ft
Flights observed
126
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Current position

A54C49 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A54C49 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
N440TC - 126 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N440TC - Jul 20, 15:50 UTCJul 20, 16:40 UTC50m
2026-07-20 N440TC - Jul 20, 13:30 UTCJul 20, 14:30 UTC1h 0m
2026-07-18 N440TC CNW → CNW Jul 18, 19:10 UTCJul 18, 19:50 UTC40m
2026-07-17 N440TC CNW → CNW Jul 17, 18:40 UTCJul 17, 19:40 UTC1h 0m
2026-07-17 N440TC - Jul 17, 16:10 UTCJul 17, 16:59 UTC50m
2026-07-16 N440TC - Jul 16, 02:20 UTCJul 16, 03:25 UTC1h 5m
2026-07-10 N440TC - Jul 10, 20:35 UTCJul 10, 20:55 UTC20m
2026-07-10 N440TC - Jul 10, 16:00 UTCJul 10, 17:00 UTC1h 0m
2026-07-08 N440TC - Jul 8, 23:50 UTCJul 9, 01:15 UTC1h 25m
2026-07-08 N440TC - Jul 8, 21:25 UTCJul 8, 22:45 UTC1h 20m
2026-07-08 N440TC CNW → CNW Jul 8, 18:50 UTCJul 8, 19:45 UTC55m
2026-07-08 N440TC CNW → CNW Jul 8, 16:05 UTCJul 8, 17:00 UTC55m
2026-07-07 N440TC CNW → CNW Jul 7, 15:50 UTCJul 7, 16:50 UTC1h 0m
2026-07-07 N440TC - Jul 7, 13:15 UTCJul 7, 14:15 UTC1h 0m
2026-07-06 N440TC - Jul 6, 18:45 UTCJul 6, 20:15 UTC1h 30m
2026-07-03 N440TC CNW → CNW Jul 3, 17:05 UTCJul 3, 18:10 UTC1h 5m
2026-07-02 N440TC - Jul 2, 19:50 UTCJul 2, 21:00 UTC1h 10m
2026-07-02 N440TC - Jul 2, 14:40 UTCJul 2, 16:10 UTC1h 30m
2026-07-01 N440TC CNW → CNW Jul 1, 23:40 UTCJul 2, 00:15 UTC35m
2026-07-01 N440TC CNW → CNW Jul 1, 21:30 UTCJul 1, 22:15 UTC45m
2026-07-01 N440TC - Jul 1, 19:00 UTCJul 1, 19:45 UTC45m
2026-07-01 N440TC CNW → CNW Jul 1, 15:45 UTCJul 1, 16:50 UTC1h 5m
2026-06-30 N440TC - Jun 30, 21:50 UTCJun 30, 22:55 UTC1h 5m
2026-06-30 N440TC - Jun 30, 19:15 UTCJun 30, 20:15 UTC1h 0m
2026-06-30 N440TC - Jun 30, 16:00 UTCJun 30, 17:10 UTC1h 10m
2026-06-30 N440TC - Jun 30, 13:50 UTCJun 30, 14:35 UTC45m
2026-06-29 N440TC - Jun 29, 21:14 UTCJun 29, 22:15 UTC1h 0m
2026-06-29 N440TC - Jun 29, 19:05 UTCJun 29, 20:09 UTC1h 5m
2026-06-29 N440TC - Jun 29, 15:39 UTCJun 29, 16:39 UTC1h 0m
2026-06-29 N440TC - Jun 29, 13:49 UTCJun 29, 14:44 UTC55m
2026-06-29 N440TC - Jun 29, 00:24 UTCJun 29, 02:09 UTC1h 45m
2026-06-28 N440TC - Jun 28, 18:25 UTCJun 28, 19:29 UTC1h 5m
2026-06-27 N440TC - Jun 27, 02:39 UTCJun 27, 04:00 UTC1h 20m
2026-06-26 N440TC - Jun 26, 21:15 UTCJun 26, 22:34 UTC1h 20m
2026-06-26 N440TC - Jun 26, 18:49 UTCJun 26, 19:39 UTC50m
2026-06-26 N440TC - Jun 26, 15:54 UTCJun 26, 16:44 UTC50m
2026-06-24 N440TC CNW → CNW Jun 24, 18:39 UTCJun 24, 19:00 UTC20m
2026-06-24 N440TC CNW → CNW Jun 24, 15:44 UTCJun 24, 16:59 UTC1h 15m
2026-06-24 N440TC - Jun 24, 05:44 UTCJun 24, 06:25 UTC40m
2026-06-24 N440TC - Jun 24, 02:20 UTCJun 24, 03:15 UTC55m
2026-06-23 N440TC CNW → CNW Jun 23, 21:34 UTCJun 23, 22:25 UTC50m
2026-06-23 N440TC - Jun 23, 18:55 UTCJun 23, 20:15 UTC1h 20m
2026-06-23 N440TC - Jun 23, 15:40 UTCJun 23, 16:54 UTC1h 15m
2026-06-23 N440TC - Jun 23, 13:24 UTCJun 23, 14:44 UTC1h 20m
2026-06-23 N440TC CNW → CNW Jun 23, 02:49 UTCJun 23, 03:54 UTC1h 5m
2026-06-22 N440TC CNW → CNW Jun 22, 21:30 UTCJun 22, 23:05 UTC1h 35m
2026-06-22 N440TC - Jun 22, 19:14 UTCJun 22, 19:54 UTC40m
2026-06-22 N440TC - Jun 22, 15:45 UTCJun 22, 16:24 UTC40m
2026-06-22 N440TC CNW → CNW Jun 22, 13:29 UTCJun 22, 14:29 UTC1h 0m
2026-06-21 N440TC - Jun 21, 18:35 UTCJun 21, 20:09 UTC1h 35m

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 N440TC page for operator, model, and routing details .

Mode-S A54C49 frequently asked

What is Mode-S code A54C49?
A54C49 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N440TC.
Where is Mode-S A54C49 registered?
Mode-S code A54C49 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 A54C49 broadcasting right now?
Yes. Mode-S A54C49 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54C49, octal 51246111, decimal 10,832,969.
What flights does A54C49 operate?
Mode-S A54C49 has broadcast 1 distinct callsign, including N440TC.