Apparatus

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sensors Mode-S transponder

AA44CD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N76062 · BOEING 767-400 · operated by UNITED AIRLINES INC

Hex
AA44CD
Octal
52442315
Decimal
11,158,733
Country
US
Tail
N76062
Type
B764
Broadcasting now · callsign UAL861 · 35,000 ft
Flights observed
217
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

AA44CD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AA44CD 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
UAL51 - 13 2026-07-11
UAL509 United Airlines 13 2026-07-07
UAL861 - 12 2026-07-14
UAL260 United Airlines 12 2026-06-27
UAL2143 - 12 2026-07-10
UAL1173 - 11 2026-07-10
UAL510 United Airlines 10 2026-05-31
UAL261 - 10 2026-07-11
UAL860 United Airlines 9 2026-06-23
UAL127 - 9 2026-07-13
UAL121 United Airlines 8 2026-06-07
UAL50 - 7 2026-06-28
UAL126 - 7 2026-07-13
UAL992 United Airlines 5 2026-05-03
UAL386 - 5 2026-07-09
UAL237 - 5 2026-06-26
UAL120 United Airlines 5 2026-06-06
UAL385 - 4 2026-07-08
UAL345 United Airlines 4 2026-06-13
UAL344 United Airlines 4 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL861 - Jul 14, 03:00 UTCJul 14, 07:50 UTC4h 50m
2026-07-13 UAL127 - Jul 13, 14:00 UTCJul 13, 15:15 UTC1h 15m
2026-07-13 UAL127 FCO → IAD Jul 13, 13:47 UTCJul 13, 23:15 UTC9h 28m
2026-07-13 UAL126 - Jul 13, 03:05 UTCJul 13, 11:25 UTC8h 20m
2026-07-11 UAL261 MAD → IAD Jul 11, 09:30 UTCJul 11, 17:25 UTC7h 55m
2026-07-11 UAL51 - Jul 11, 00:05 UTCJul 11, 06:50 UTC6h 45m
2026-07-10 UAL1173 - Jul 10, 20:15 UTCJul 10, 21:15 UTC1h 0m
2026-07-10 UAL1173 - Jul 10, 17:50 UTCJul 10, 18:00 UTC10m
2026-07-10 UAL2143 - Jul 10, 12:20 UTCJul 10, 15:45 UTC3h 25m
2026-07-09 UAL386 DBV → EWR Jul 9, 08:20 UTCJul 9, 17:28 UTC9h 8m
2026-07-09 UAL386 DBV → EWR Jul 9, 08:05 UTCJul 9, 17:20 UTC9h 15m
2026-07-08 UAL385 - Jul 8, 21:30 UTCJul 9, 05:45 UTC8h 15m
2026-07-07 UAL509 DEN → SFO Jul 7, 16:05 UTCJul 8, 00:45 UTC8h 40m
2026-07-07 UAL126 IAD → FCO Jul 7, 06:08 UTCJul 7, 14:02 UTC7h 54m
2026-07-07 UAL126 IAD → FCO Jul 7, 06:00 UTCJul 7, 14:10 UTC8h 10m
2026-07-05 UAL127 PHL → IAD Jul 5, 02:30 UTCJul 5, 03:05 UTC35m
2026-07-05 UAL127 PHL → IAD Jul 5, 01:37 UTCJul 5, 03:05 UTC1h 28m
2026-07-05 UAL127 PHL → PHL Jul 5, 01:15 UTCJul 5, 01:20 UTC5m
2026-07-04 UAL127 - Jul 4, 13:50 UTCJul 4, 23:55 UTC10h 5m
2026-07-04 UAL126 IAD → FCO Jul 4, 02:45 UTCJul 4, 10:55 UTC8h 10m
2026-07-03 UAL127 - Jul 3, 14:10 UTCJul 3, 23:20 UTC9h 10m
2026-07-03 UAL127 FCO → IAD Jul 3, 13:47 UTCJul 3, 23:16 UTC9h 29m
2026-07-03 UAL126 IAD → FCO Jul 3, 02:55 UTCJul 3, 11:00 UTC8h 5m
2026-06-30 UAL261 MAD → IAD Jun 30, 09:40 UTCJun 30, 17:20 UTC7h 40m
2026-06-30 UAL51 - Jun 30, 00:04 UTCJun 30, 06:40 UTC6h 36m
2026-06-29 UAL51 EWR → MAD Jun 29, 23:50 UTCJun 30, 06:37 UTC6h 47m
2026-06-29 UAL1173 SJU → EWR Jun 29, 17:34 UTCJun 29, 21:14 UTC3h 40m
2026-06-29 UAL2143 EWR → SJU Jun 29, 12:27 UTCJun 29, 15:37 UTC3h 10m
2026-06-29 UAL2143 - Jun 29, 12:24 UTCJun 29, 15:39 UTC3h 15m
2026-06-28 UAL50 - Jun 28, 09:10 UTCJun 28, 17:04 UTC7h 55m
2026-06-27 UAL260 ABQ → SFO Jun 27, 22:41 UTCJun 28, 05:12 UTC6h 31m
2026-06-27 UAL260 ABQ → SFO Jun 27, 22:29 UTCJun 27, 23:50 UTC1h 20m
2026-06-27 UAL261 - Jun 27, 09:34 UTCJun 27, 17:49 UTC8h 15m
2026-06-26 UAL51 - Jun 26, 23:55 UTCJun 27, 06:09 UTC6h 15m
2026-06-26 UAL237 - Jun 26, 08:30 UTCJun 26, 16:49 UTC8h 20m
2026-06-25 UAL236 - Jun 25, 20:25 UTCJun 26, 03:39 UTC7h 15m
2026-06-25 UAL736 - Jun 25, 08:50 UTCJun 25, 18:00 UTC9h 10m
2026-06-24 UAL735 - Jun 24, 21:09 UTCJun 25, 05:09 UTC8h 0m
2026-06-24 UAL50 - Jun 24, 09:05 UTCJun 24, 16:29 UTC7h 25m
2026-06-23 UAL260 ABQ → SFO Jun 23, 23:05 UTCJun 24, 06:04 UTC7h 0m
2026-06-23 UAL860 GRU → IAD Jun 23, 00:54 UTCJun 23, 09:59 UTC9h 5m
2026-06-22 UAL861 BOS → GIG Jun 22, 11:38 UTCJun 22, 20:27 UTC8h 49m
2026-06-22 UAL861 BOS → GIG Jun 22, 11:30 UTCJun 22, 12:10 UTC40m
2026-06-21 UAL3908 - Jun 21, 03:49 UTCJun 21, 13:04 UTC9h 15m
2026-06-19 UAL861 BOS → GIG Jun 19, 03:20 UTCJun 19, 12:29 UTC9h 10m
2026-06-18 UAL127 DUB → IAD Jun 18, 14:30 UTCJun 18, 23:50 UTC9h 20m
2026-06-18 UAL126 IAD → DUB Jun 18, 03:40 UTCJun 18, 09:15 UTC5h 35m
2026-06-18 UAL126 IAD → DUB Jun 18, 03:18 UTCJun 18, 11:43 UTC8h 25m
2026-06-17 UAL261 - Jun 17, 09:45 UTCJun 17, 17:40 UTC7h 55m
2026-06-16 UAL260 ABQ → SFO Jun 16, 22:40 UTCJun 17, 05:55 UTC7h 15m

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 N76062 page for operator, model, and routing details .

Mode-S AA44CD frequently asked

What is Mode-S code AA44CD?
AA44CD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N76062.
Where is Mode-S AA44CD registered?
Mode-S code AA44CD 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 AA44CD broadcasting right now?
Yes. Mode-S AA44CD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA44CD, octal 52442315, decimal 11,158,733.
What flights does AA44CD operate?
Mode-S AA44CD has broadcast 20 distinct callsigns, including UAL51, UAL509, UAL861, UAL260, UAL2143.