Apparatus

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sensors Mode-S transponder

AA44D0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N76065 · BOEING 767-400 · operated by UNITED AIRLINES INC

Hex
AA44D0
Octal
52442320
Decimal
11,158,736
Country
US
Tail
N76065
Type
B764
No current signal · last broadcast 2d ago
Flights observed
251
Distinct callsigns
20
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S AA44D0.

Country allocation

The ICAO 24-bit address AA44D0 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
UAL509 - 13 2026-07-11
UAL50 - 13 2026-06-26
UAL1173 - 13 2026-07-09
UAL510 - 12 2026-07-11
UAL51 - 12 2026-06-14
UAL2143 - 12 2026-07-09
UAL386 - 11 2026-07-06
UAL330 - 11 2026-06-22
UAL30 United Airlines 11 2026-05-18
UAL260 United Airlines 11 2026-06-25
UAL169 - 11 2026-07-08
UAL963 United Airlines 10 2026-04-24
UAL962 United Airlines 10 2026-04-23
UAL385 - 9 2026-07-05
UAL331 - 9 2026-06-22
UAL31 United Airlines 9 2026-05-18
UAL170 - 9 2026-07-07
UAL860 United Airlines 8 2026-06-25
UAL261 United Airlines 8 2026-06-14
UAL861 United Airlines 7 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 UAL509 - Jul 11, 11:40 UTCJul 11, 12:00 UTC20m
2026-07-11 UAL509 FCO → EWR Jul 11, 11:22 UTCJul 11, 20:30 UTC9h 8m
2026-07-11 UAL510 EWR → FCO Jul 11, 00:46 UTCJul 11, 08:31 UTC7h 45m
2026-07-11 UAL510 - Jul 11, 00:40 UTCJul 11, 08:40 UTC8h 0m
2026-07-10 UAL509 - Jul 10, 11:20 UTCJul 10, 20:35 UTC9h 15m
2026-07-10 UAL510 EWR → FCO Jul 10, 00:46 UTCJul 10, 08:21 UTC7h 35m
2026-07-10 UAL510 - Jul 10, 00:30 UTCJul 10, 08:00 UTC7h 30m
2026-07-09 UAL1173 - Jul 9, 20:40 UTCJul 9, 21:40 UTC1h 0m
2026-07-09 UAL1173 - Jul 9, 18:10 UTCJul 9, 18:20 UTC10m
2026-07-09 UAL2143 - Jul 9, 16:15 UTCJul 9, 16:35 UTC20m
2026-07-09 UAL2143 EWR → SJU Jul 9, 12:27 UTCJul 9, 16:30 UTC4h 3m
2026-07-09 UAL2143 - Jul 9, 12:55 UTCJul 9, 14:05 UTC1h 10m
2026-07-08 UAL169 - Jul 8, 09:20 UTCJul 8, 18:05 UTC8h 45m
2026-07-08 UAL169 VCE → EWR Jul 8, 09:29 UTCJul 8, 18:01 UTC8h 32m
2026-07-07 UAL170 EWR → VCE Jul 7, 23:09 UTCJul 8, 06:29 UTC7h 20m
2026-07-07 UAL170 - Jul 7, 23:00 UTCJul 8, 06:30 UTC7h 30m
2026-07-07 UAL169 - Jul 7, 10:05 UTCJul 7, 18:35 UTC8h 30m
2026-07-07 UAL170 EWR → VCE Jul 7, 00:09 UTCJul 7, 07:46 UTC7h 37m
2026-07-07 UAL170 - Jul 7, 00:35 UTCJul 7, 07:55 UTC7h 20m
2026-07-06 UAL386 - Jul 6, 10:20 UTCJul 6, 20:00 UTC9h 40m
2026-07-05 UAL385 - Jul 5, 23:55 UTCJul 6, 07:40 UTC7h 45m
2026-07-04 UAL3049 - Jul 4, 12:25 UTCJul 4, 14:00 UTC1h 35m
2026-07-04 UAL3049 FCO → EWR Jul 4, 12:27 UTCJul 4, 21:31 UTC9h 4m
2026-07-03 UAL510 EWR → FCO Jul 3, 01:46 UTCJul 3, 08:52 UTC7h 6m
2026-07-03 UAL510 - Jul 3, 01:25 UTCJul 3, 08:00 UTC6h 35m
2026-07-02 UAL15 - Jul 2, 14:45 UTCJul 2, 22:30 UTC7h 45m
2026-07-02 UAL904 EWR → LHR Jul 2, 03:30 UTCJul 2, 10:00 UTC6h 30m
2026-07-01 UAL386 - Jul 1, 10:35 UTCJul 1, 20:00 UTC9h 25m
2026-07-01 UAL386 DBV → EWR Jul 1, 10:35 UTCJul 1, 20:07 UTC9h 32m
2026-06-30 UAL385 - Jun 30, 23:35 UTCJul 1, 08:00 UTC8h 25m
2026-06-30 UAL509 DEN → SFO Jun 30, 11:25 UTCJun 30, 20:20 UTC8h 55m
2026-06-30 UAL510 - Jun 30, 00:39 UTCJun 30, 08:35 UTC7h 56m
2026-06-29 UAL509 DEN → SFO Jun 29, 11:14 UTCJun 29, 20:09 UTC8h 55m
2026-06-29 UAL509 DEN → SFO Jun 29, 11:22 UTCJun 29, 20:06 UTC8h 44m
2026-06-29 UAL510 - Jun 29, 00:34 UTCJun 29, 08:54 UTC8h 20m
2026-06-28 UAL386 DBV → EWR Jun 28, 10:44 UTCJun 28, 13:55 UTC3h 10m
2026-06-28 UAL386 DBV → EWR Jun 28, 10:35 UTCJun 28, 20:03 UTC9h 28m
2026-06-27 UAL385 EWR → DBV Jun 27, 23:45 UTCJun 28, 07:15 UTC7h 30m
2026-06-27 UAL385 EWR → DBV Jun 27, 23:25 UTCJun 28, 07:25 UTC8h 0m
2026-06-27 UAL736 - Jun 27, 08:44 UTCJun 27, 17:59 UTC9h 15m
2026-06-26 UAL735 EWR → PMO Jun 26, 21:28 UTCJun 27, 04:51 UTC7h 23m
2026-06-26 UAL735 - Jun 26, 21:04 UTCJun 27, 04:00 UTC6h 55m
2026-06-26 UAL50 MAD → EWR Jun 26, 09:10 UTCJun 26, 17:15 UTC8h 5m
2026-06-25 UAL260 ABQ → SFO Jun 25, 22:36 UTCJun 26, 05:33 UTC6h 57m
2026-06-25 UAL260 ABQ → SFO Jun 25, 22:39 UTCJun 26, 05:35 UTC6h 55m
2026-06-25 UAL860 GRU → IAD Jun 25, 01:09 UTCJun 25, 10:25 UTC9h 15m
2026-06-24 UAL861 BOS → GIG Jun 24, 03:15 UTCJun 24, 12:34 UTC9h 20m
2026-06-22 UAL331 - Jun 22, 16:20 UTCJun 23, 00:24 UTC8h 5m
2026-06-22 UAL330 IAD → CDG Jun 22, 03:16 UTCJun 22, 10:06 UTC6h 50m
2026-06-22 UAL330 - Jun 22, 03:14 UTCJun 22, 10:05 UTC6h 50m

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 N76065 page for operator, model, and routing details .

Mode-S AA44D0 frequently asked

What is Mode-S code AA44D0?
AA44D0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N76065.
Where is Mode-S AA44D0 registered?
Mode-S code AA44D0 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 AA44D0 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA44D0, octal 52442320, decimal 11,158,736.
What flights does AA44D0 operate?
Mode-S AA44D0 has broadcast 20 distinct callsigns, including UAL509, UAL50, UAL1173, UAL510, UAL51.