Apparatus

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sensors Mode-S transponder

AAA5AE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N78511 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
AAA5AE
Octal
52522656
Decimal
11,183,534
Country
US
Tail
N78511
Type
B738
Broadcasting now · callsign UAL1363 · 6,200 ft
Flights observed
340
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

AAA5AE is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AAA5AE 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
UAL669 United Airlines 5 2026-06-05
UAL2005 - 4 2026-07-05
UAL1627 - 4 2026-06-15
UAL452 United Airlines 3 2026-06-12
UAL430 - 3 2026-06-22
UAL2780 United Airlines 3 2026-06-01
UAL2338 United Airlines 3 2026-05-03
UAL211 United Airlines 3 2026-05-07
UAL2074 - 3 2026-07-02
UAL1998 United Airlines 3 2026-05-13
UAL1953 United Airlines 3 2026-06-30
UAL1821 - 3 2026-07-07
UAL1708 United Airlines 3 2026-05-07
UAL8278 - 2 2026-06-28
UAL8111 - 2 2026-06-17
UAL791 - 2 2026-06-25
UAL786 United Airlines 2 2026-06-07
UAL763 United Airlines 2 2026-05-27
UAL725 - 2 2026-07-10
UAL680 - 2 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL1754 SFO → LAX Jul 13, 23:45 UTCJul 14, 00:45 UTC1h 0m
2026-07-13 UAL1427 - Jul 13, 20:40 UTCJul 13, 22:10 UTC1h 30m
2026-07-13 UAL1427 PHX → SFO Jul 13, 20:30 UTCJul 13, 22:06 UTC1h 36m
2026-07-13 UAL500 SFO → PHX Jul 13, 17:25 UTCJul 13, 19:05 UTC1h 40m
2026-07-13 UAL1604 - Jul 13, 14:55 UTCJul 13, 15:50 UTC55m
2026-07-13 UAL589 SFO → SNA Jul 13, 02:20 UTCJul 13, 03:25 UTC1h 5m
2026-07-12 UAL298 - Jul 12, 20:35 UTCJul 13, 00:40 UTC4h 5m
2026-07-12 UAL213 IAD → BNA Jul 12, 17:06 UTCJul 12, 18:16 UTC1h 10m
2026-07-12 UAL213 IAD → BNA Jul 12, 17:01 UTCJul 12, 18:20 UTC1h 20m
2026-07-12 UAL2098 BOS → IAD Jul 12, 13:40 UTCJul 12, 14:50 UTC1h 10m
2026-07-11 UAL2798 DEN → BOS Jul 11, 22:10 UTCJul 12, 01:40 UTC3h 30m
2026-07-11 UAL708 FLV → DEN Jul 11, 19:10 UTCJul 11, 20:30 UTC1h 20m
2026-07-11 UAL2159 - Jul 11, 16:50 UTCJul 11, 18:00 UTC1h 10m
2026-07-11 UAL225 - Jul 11, 12:40 UTCJul 11, 14:20 UTC1h 40m
2026-07-11 UAL719 - Jul 11, 03:40 UTCJul 11, 04:55 UTC1h 15m
2026-07-10 UAL725 ABQ → DEN Jul 10, 22:40 UTCJul 11, 00:40 UTC2h 0m
2026-07-10 UAL725 ABQ → DEN Jul 10, 22:37 UTCJul 11, 00:34 UTC1h 57m
2026-07-10 UAL691 DEN → ABQ Jul 10, 20:10 UTCJul 10, 21:05 UTC55m
2026-07-10 UAL1191 BUR → DEN Jul 10, 16:20 UTCJul 10, 18:10 UTC1h 50m
2026-07-10 UAL2411 DEN → BUR Jul 10, 02:05 UTCJul 10, 04:10 UTC2h 5m
2026-07-09 UAL2757 - Jul 9, 20:40 UTCJul 10, 01:00 UTC4h 20m
2026-07-09 UAL1003 - Jul 9, 16:10 UTCJul 9, 19:10 UTC3h 0m
2026-07-09 UAL1003 DEN → CHS Jul 9, 16:11 UTCJul 9, 19:10 UTC2h 59m
2026-07-09 UAL1522 - Jul 9, 12:05 UTCJul 9, 14:20 UTC2h 15m
2026-07-09 UAL1816 DEN → YEG Jul 9, 02:10 UTCJul 9, 04:35 UTC2h 25m
2026-07-09 UAL1816 DEN → YEG Jul 9, 02:15 UTCJul 9, 04:27 UTC2h 12m
2026-07-08 UAL2085 - Jul 8, 21:50 UTCJul 9, 00:10 UTC2h 20m
2026-07-08 UAL2051 SFO → YVR Jul 8, 18:20 UTCJul 8, 20:05 UTC1h 45m
2026-07-08 UAL565 - Jul 8, 10:40 UTCJul 8, 15:30 UTC4h 50m
2026-07-08 UAL1649 ORD → YYZ Jul 8, 03:38 UTCJul 8, 04:42 UTC1h 4m
2026-07-08 UAL1649 - Jul 8, 03:45 UTCJul 8, 04:45 UTC1h 0m
2026-07-07 UAL1098 LGA → ORD Jul 7, 23:05 UTCJul 8, 01:05 UTC2h 0m
2026-07-07 UAL1821 - Jul 7, 19:20 UTCJul 7, 21:00 UTC1h 40m
2026-07-07 UAL2635 LGA → ORD Jul 7, 15:30 UTCJul 7, 17:35 UTC2h 5m
2026-07-07 UAL1657 ORD → LGA Jul 7, 12:33 UTCJul 7, 14:00 UTC1h 27m
2026-07-07 UAL1657 ORD → LGA Jul 7, 12:30 UTCJul 7, 14:05 UTC1h 35m
2026-07-07 UAL1830 LGA → ORD Jul 7, 05:15 UTCJul 7, 07:10 UTC1h 55m
2026-07-07 UAL2306 ORD → LGA Jul 7, 00:10 UTCJul 7, 02:00 UTC1h 50m
2026-07-06 UAL1398 COS → ORD Jul 6, 18:28 UTCJul 6, 20:10 UTC1h 42m
2026-07-06 UAL1398 COS → ORD Jul 6, 18:20 UTCJul 6, 20:20 UTC2h 0m
2026-07-06 UAL1082 ORD → COS Jul 6, 15:05 UTCJul 6, 17:00 UTC1h 55m
2026-07-05 UAL2005 - Jul 5, 20:05 UTCJul 5, 22:00 UTC1h 55m
2026-07-05 UAL2005 - Jul 5, 19:50 UTCJul 5, 20:00 UTC10m
2026-07-05 UAL2672 - Jul 5, 16:15 UTCJul 5, 18:05 UTC1h 50m
2026-07-05 UAL2822 LGA → ORD Jul 5, 11:40 UTCJul 5, 13:45 UTC2h 5m
2026-07-04 UAL334 - Jul 4, 21:30 UTCJul 5, 00:40 UTC3h 10m
2026-07-04 UAL334 IAH → LGA Jul 4, 21:36 UTCJul 5, 00:39 UTC3h 3m
2026-07-04 UAL1165 - Jul 4, 12:55 UTCJul 4, 19:05 UTC6h 10m
2026-07-03 UAL1867 - Jul 3, 21:05 UTCJul 3, 22:55 UTC1h 50m
2026-07-03 UAL1919 - Jul 3, 17:35 UTCJul 3, 19:20 UTC1h 45m

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 N78511 page for operator, model, and routing details .

Mode-S AAA5AE frequently asked

What is Mode-S code AAA5AE?
AAA5AE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N78511.
Where is Mode-S AAA5AE registered?
Mode-S code AAA5AE 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 AAA5AE broadcasting right now?
Yes. Mode-S AAA5AE is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAA5AE, octal 52522656, decimal 11,183,534.
What flights does AAA5AE operate?
Mode-S AAA5AE has broadcast 20 distinct callsigns, including UAL669, UAL2005, UAL1627, UAL452, UAL430.