Apparatus

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sensors Mode-S transponder

AA44CF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N76064 · BOEING 767-400 · operated by UNITED AIRLINES INC

Hex
AA44CF
Octal
52442317
Decimal
11,158,735
Country
US
Tail
N76064
Type
B764
No current signal · last broadcast 12h ago
Flights observed
168
Distinct callsigns
20
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S AA44CF.

Country allocation

The ICAO 24-bit address AA44CF 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
UAL331 - 9 2026-06-15
UAL261 - 9 2026-07-13
UAL2143 - 9 2026-07-01
UAL169 - 9 2026-07-12
UAL860 United Airlines 8 2026-06-17
UAL330 - 8 2026-06-15
UAL1173 United Airlines 8 2026-07-01
UAL963 United Airlines 7 2026-04-16
UAL962 United Airlines 7 2026-04-16
UAL861 United Airlines 7 2026-06-16
UAL510 - 7 2026-07-02
UAL51 - 7 2026-07-12
UAL509 United Airlines 7 2026-07-02
UAL386 - 7 2026-06-30
UAL260 - 7 2026-07-08
UAL237 - 6 2026-07-10
UAL170 - 6 2026-07-11
UAL385 - 5 2026-06-29
UAL736 - 4 2026-07-11
UAL3926 United Airlines 4 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL261 - Jul 13, 09:40 UTCJul 13, 17:30 UTC7h 50m
2026-07-12 UAL51 - Jul 12, 23:40 UTCJul 13, 06:30 UTC6h 50m
2026-07-12 UAL169 - Jul 12, 09:35 UTCJul 12, 18:10 UTC8h 35m
2026-07-12 UAL169 VCE → EWR Jul 12, 09:29 UTCJul 12, 18:14 UTC8h 45m
2026-07-11 UAL170 EWR → VCE Jul 11, 23:13 UTCJul 12, 06:41 UTC7h 28m
2026-07-11 UAL170 - Jul 11, 23:10 UTCJul 12, 00:40 UTC1h 30m
2026-07-11 UAL736 - Jul 11, 08:05 UTCJul 11, 17:35 UTC9h 30m
2026-07-11 UAL736 PMO → EWR Jul 11, 08:03 UTCJul 11, 17:29 UTC9h 26m
2026-07-10 UAL735 EWR → PMO Jul 10, 20:53 UTCJul 11, 05:06 UTC8h 13m
2026-07-10 UAL735 - Jul 10, 21:00 UTCJul 11, 03:45 UTC6h 45m
2026-07-10 UAL237 - Jul 10, 08:25 UTCJul 10, 16:30 UTC8h 5m
2026-07-10 UAL237 PMI → EWR Jul 10, 08:23 UTCJul 10, 16:26 UTC8h 3m
2026-07-09 UAL236 - Jul 9, 20:55 UTCJul 10, 04:10 UTC7h 15m
2026-07-09 UAL50 - Jul 9, 09:05 UTCJul 9, 16:40 UTC7h 35m
2026-07-08 UAL260 - Jul 8, 22:35 UTCJul 9, 06:00 UTC7h 25m
2026-07-08 UAL261 - Jul 8, 09:40 UTCJul 8, 17:45 UTC8h 5m
2026-07-07 UAL260 ABQ → SFO Jul 7, 23:30 UTCJul 8, 06:30 UTC7h 0m
2026-07-07 UAL261 MAD → IAD Jul 7, 10:00 UTCJul 7, 17:45 UTC7h 45m
2026-07-07 UAL260 ABQ → SFO Jul 7, 00:10 UTCJul 7, 07:25 UTC7h 15m
2026-07-06 UAL260 ABQ → SFO Jul 6, 23:26 UTCJul 7, 07:21 UTC7h 55m
2026-07-05 UAL53 ZRH → IAD Jul 5, 11:15 UTCJul 5, 19:55 UTC8h 40m
2026-07-05 UAL52 IAD → ZRH Jul 5, 01:30 UTCJul 5, 09:00 UTC7h 30m
2026-07-03 UAL261 MAD → IAD Jul 3, 09:40 UTCJul 3, 17:35 UTC7h 55m
2026-07-03 UAL261 MAD → IAD Jul 3, 09:43 UTCJul 3, 17:31 UTC7h 48m
2026-07-03 UAL51 - Jul 3, 00:05 UTCJul 3, 07:15 UTC7h 10m
2026-07-02 UAL509 DEN → SFO Jul 2, 12:25 UTCJul 2, 21:20 UTC8h 55m
2026-07-02 UAL509 DEN → SFO Jul 2, 11:22 UTCJul 2, 21:13 UTC9h 51m
2026-07-02 UAL510 EWR → FCO Jul 2, 00:46 UTCJul 2, 09:07 UTC8h 21m
2026-07-02 UAL510 - Jul 2, 01:20 UTCJul 2, 09:20 UTC8h 0m
2026-07-01 UAL1173 SJU → EWR Jul 1, 17:35 UTCJul 1, 17:45 UTC10m
2026-07-01 UAL1173 SJU → EWR Jul 1, 17:39 UTCJul 1, 21:03 UTC3h 24m
2026-07-01 UAL2143 - Jul 1, 15:35 UTCJul 1, 15:55 UTC20m
2026-07-01 UAL2143 EWR → SJU Jul 1, 12:27 UTCJul 1, 15:56 UTC3h 29m
2026-07-01 UAL2143 - Jul 1, 12:40 UTCJul 1, 13:10 UTC30m
2026-06-30 UAL386 DBV → EWR Jun 30, 10:35 UTCJun 30, 19:48 UTC9h 13m
2026-06-30 UAL386 DBV → EWR Jun 30, 10:35 UTCJun 30, 19:53 UTC9h 18m
2026-06-30 UAL386 DBV → BEB Jun 30, 10:25 UTCJun 30, 13:30 UTC3h 5m
2026-06-29 UAL385 EWR → DBV Jun 29, 23:45 UTCJun 30, 07:56 UTC8h 11m
2026-06-29 UAL385 - Jun 29, 23:34 UTCJun 30, 00:30 UTC55m
2026-06-29 UAL386 DBV → EWR Jun 29, 10:35 UTCJun 29, 19:46 UTC9h 11m
2026-06-29 UAL386 DBV → EWR Jun 29, 10:35 UTCJun 29, 19:58 UTC9h 23m
2026-06-29 UAL386 DBV → EWR Jun 29, 10:29 UTCJun 29, 11:45 UTC1h 15m
2026-06-28 UAL385 EWR → DBV Jun 28, 23:45 UTCJun 29, 07:46 UTC8h 1m
2026-06-28 UAL385 EWR → DBV Jun 28, 23:34 UTCJun 29, 00:24 UTC50m
2026-06-28 UAL1173 SJU → EWR Jun 28, 20:09 UTCJun 28, 21:04 UTC55m
2026-06-28 UAL1173 SJU → EWR Jun 28, 17:30 UTCJun 28, 17:39 UTC10m
2026-06-28 UAL2143 - Jun 28, 15:34 UTCJun 28, 15:55 UTC20m
2026-06-28 UAL2143 - Jun 28, 12:35 UTCJun 28, 13:29 UTC55m
2026-06-27 UAL386 DBV → EWR Jun 27, 10:29 UTCJun 27, 19:59 UTC9h 30m
2026-06-27 UAL385 EWR → DBV Jun 27, 00:00 UTCJun 27, 08:10 UTC8h 10m

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 N76064 page for operator, model, and routing details .

Mode-S AA44CF frequently asked

What is Mode-S code AA44CF?
AA44CF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N76064.
Where is Mode-S AA44CF registered?
Mode-S code AA44CF 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 AA44CF broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA44CF, octal 52442317, decimal 11,158,735.
What flights does AA44CF operate?
Mode-S AA44CF has broadcast 20 distinct callsigns, including UAL331, UAL261, UAL2143, UAL169, UAL860.