Apparatus

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sensors Mode-S transponder

AB14B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N813CA · operated by CHRISTIANSEN AVIATION LLC

Hex
AB14B4
Octal
52612264
Decimal
11,211,956
Country
US
Tail
N813CA
Type
C172
No current signal · last broadcast Jul 24, 18:25 UTC
Flights observed
139
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 18:25 UTC

Last known position

Most recent position reported by Mode-S AB14B4.

Country allocation

The ICAO 24-bit address AB14B4 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
AUB139 - 139 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 AUB139 AUO → AUO Jul 24, 15:35 UTCJul 24, 18:20 UTC2h 45m
2026-07-23 AUB139 AUO → AUO Jul 23, 16:40 UTCJul 23, 17:55 UTC1h 15m
2026-07-22 AUB139 AUO → AUO Jul 22, 19:40 UTCJul 22, 20:55 UTC1h 15m
2026-07-21 AUB139 - Jul 21, 22:50 UTCJul 21, 23:25 UTC35m
2026-07-21 AUB139 - Jul 21, 22:10 UTCJul 21, 22:20 UTC10m
2026-07-20 AUB139 - Jul 20, 21:05 UTCJul 20, 21:15 UTC10m
2026-07-20 AUB139 - Jul 20, 20:10 UTCJul 20, 20:30 UTC20m
2026-07-20 AUB139 AUO → AUO Jul 20, 15:30 UTCJul 20, 16:40 UTC1h 10m
2026-07-17 AUB139 - Jul 17, 18:19 UTCJul 17, 18:44 UTC25m
2026-07-17 AUB139 - Jul 17, 16:59 UTCJul 17, 17:20 UTC20m
2026-07-17 AUB139 AUO → AUO Jul 17, 14:30 UTCJul 17, 15:35 UTC1h 5m
2026-07-17 AUB139 - Jul 17, 03:14 UTCJul 17, 04:10 UTC55m
2026-07-17 AUB139 - Jul 17, 01:35 UTCJul 17, 02:30 UTC55m
2026-07-16 AUB139 - Jul 16, 20:25 UTCJul 16, 20:55 UTC30m
2026-07-16 AUB139 - Jul 16, 19:25 UTCJul 16, 19:50 UTC25m
2026-07-15 AUB139 - Jul 15, 20:20 UTCJul 15, 20:50 UTC30m
2026-07-15 AUB139 - Jul 15, 19:30 UTCJul 15, 19:40 UTC10m
2026-07-10 AUB139 AUO → AUO Jul 10, 14:25 UTCJul 10, 15:35 UTC1h 10m
2026-07-09 AUB139 AUO → AUO Jul 9, 19:20 UTCJul 9, 19:25 UTC5m
2026-07-09 AUB139 AUO → AUO Jul 9, 17:30 UTCJul 9, 19:05 UTC1h 35m
2026-07-09 AUB139 AUO → AUO Jul 9, 13:00 UTCJul 9, 13:50 UTC50m
2026-07-08 AUB139 - Jul 8, 22:00 UTCJul 8, 22:10 UTC10m
2026-07-08 AUB139 - Jul 8, 20:40 UTCJul 8, 21:25 UTC45m
2026-07-08 AUB139 - Jul 8, 15:25 UTCJul 8, 15:50 UTC25m
2026-07-08 AUB139 - Jul 8, 14:40 UTCJul 8, 14:55 UTC15m
2026-07-07 AUB139 AUO → AUO Jul 7, 19:50 UTCJul 7, 21:15 UTC1h 25m
2026-07-07 AUB139 AUO → AUO Jul 7, 17:35 UTCJul 7, 18:30 UTC55m
2026-07-06 AUB139 AUO → AUO Jul 6, 18:25 UTCJul 6, 19:35 UTC1h 10m
2026-07-03 AUB139 AUO → AUO Jul 3, 01:30 UTCJul 3, 04:20 UTC2h 50m
2026-07-02 AUB139 AUO → AUO Jul 2, 21:30 UTCJul 2, 22:25 UTC55m
2026-07-02 AUB139 AUO → AUO Jul 2, 16:10 UTCJul 2, 17:50 UTC1h 40m
2026-07-02 AUB139 LGC → AUO Jul 2, 02:00 UTCJul 2, 02:55 UTC55m
2026-07-02 AUB139 - Jul 2, 01:15 UTCJul 2, 01:30 UTC15m
2026-07-01 AUB139 AUO → AUO Jul 1, 15:25 UTCJul 1, 17:25 UTC2h 0m
2026-07-01 AUB139 AUO → AUO Jul 1, 02:50 UTCJul 1, 03:00 UTC10m
2026-07-01 AUB139 AUO → AUO Jul 1, 01:45 UTCJul 1, 02:35 UTC50m
2026-06-30 AUB139 AUO → AUO Jun 30, 15:45 UTCJun 30, 17:00 UTC1h 15m
2026-06-29 AUB139 AUO → AUO Jun 29, 20:44 UTCJun 29, 22:19 UTC1h 35m
2026-06-29 AUB139 - Jun 29, 19:09 UTCJun 29, 19:20 UTC10m
2026-06-29 AUB139 - Jun 29, 17:55 UTCJun 29, 18:05 UTC10m
2026-06-26 AUB139 AUO → AUO Jun 26, 19:45 UTCJun 26, 20:59 UTC1h 15m
2026-06-25 AUB139 AUO → AUO Jun 25, 21:40 UTCJun 25, 23:05 UTC1h 25m
2026-06-25 AUB139 - Jun 25, 17:30 UTCJun 25, 17:39 UTC10m
2026-06-25 AUB139 - Jun 25, 16:35 UTCJun 25, 16:45 UTC10m
2026-06-24 AUB139 - Jun 24, 22:19 UTCJun 24, 22:39 UTC20m
2026-06-24 AUB139 - Jun 24, 21:24 UTCJun 24, 21:44 UTC20m
2026-06-24 AUB139 AUO → AUO Jun 24, 16:59 UTCJun 24, 18:09 UTC1h 10m
2026-06-24 AUB139 - Jun 24, 14:24 UTCJun 24, 14:50 UTC25m
2026-06-24 AUB139 - Jun 24, 13:40 UTCJun 24, 13:50 UTC10m
2026-06-23 AUB139 AUO → AUO Jun 23, 20:34 UTCJun 23, 20:59 UTC25m

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 N813CA page for operator, model, and routing details .

Mode-S AB14B4 frequently asked

What is Mode-S code AB14B4?
AB14B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N813CA.
Where is Mode-S AB14B4 registered?
Mode-S code AB14B4 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 AB14B4 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 18:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB14B4, octal 52612264, decimal 11,211,956.
What flights does AB14B4 operate?
Mode-S AB14B4 has broadcast 1 distinct callsign, including AUB139.