Apparatus

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sensors Mode-S transponder

AA07F9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N74532 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
AA07F9
Octal
52403771
Decimal
11,143,161
Country
US
Tail
N74532
Type
A21N
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
457
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AA07F9.

Country allocation

The ICAO 24-bit address AA07F9 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
UAL2494 United Airlines 9 2026-07-26
UAL475 United Airlines 7 2026-06-09
UAL2089 - 7 2026-07-18
UAL695 United Airlines 6 2026-07-18
UAL2361 United Airlines 6 2026-05-09
UAL2061 United Airlines 6 2026-05-28
UAL675 - 5 2026-07-19
UAL2106 United Airlines 5 2026-07-24
UAL1568 United Airlines 5 2026-06-20
UAL798 United Airlines 4 2026-04-29
UAL731 United Airlines 4 2026-04-29
UAL655 - 4 2026-06-21
UAL647 United Airlines 4 2026-06-08
UAL470 United Airlines 4 2026-06-08
UAL353 United Airlines 4 2026-04-29
UAL2618 United Airlines 4 2026-07-22
UAL2616 United Airlines 4 2026-05-26
UAL1865 United Airlines 4 2026-05-13
UAL1812 - 4 2026-07-01
UAL1775 United Airlines 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL745 FLL → DEN Jul 26, 21:30 UTCJul 26, 22:15 UTC45m
2026-07-26 UAL2494 IAH → EWR Jul 26, 19:10 UTCJul 26, 19:25 UTC15m
2026-07-26 UAL2494 IAH → EWR Jul 26, 16:42 UTCJul 26, 18:53 UTC2h 11m
2026-07-26 UAL2494 IAH → EWR Jul 26, 16:40 UTCJul 26, 19:25 UTC2h 45m
2026-07-26 UAL1740 ORD → RSW Jul 26, 12:55 UTCJul 26, 15:10 UTC2h 15m
2026-07-25 UAL1015 EWR → MIA Jul 25, 23:02 UTCJul 26, 00:44 UTC1h 42m
2026-07-25 UAL1015 EWR → MIA Jul 25, 22:50 UTCJul 26, 01:25 UTC2h 35m
2026-07-25 UAL1693 ORD → RIC Jul 25, 19:10 UTCJul 25, 21:00 UTC1h 50m
2026-07-25 UAL2091 SFO → SBA Jul 25, 13:20 UTCJul 25, 17:00 UTC3h 40m
2026-07-25 UAL1007 ORD → ALB Jul 25, 00:30 UTCJul 25, 02:55 UTC2h 25m
2026-07-24 UAL540 PDX → DEN Jul 24, 20:35 UTCJul 24, 22:35 UTC2h 0m
2026-07-24 UAL1506 SFO → ORD Jul 24, 16:50 UTCJul 24, 19:00 UTC2h 10m
2026-07-24 UAL1506 SFO → ORD Jul 24, 16:28 UTCJul 24, 18:46 UTC2h 18m
2026-07-24 UAL1479 IAD → EWR Jul 24, 12:18 UTCJul 24, 14:07 UTC1h 49m
2026-07-24 UAL1479 IAD → EWR Jul 24, 12:10 UTCJul 24, 14:10 UTC2h 0m
2026-07-24 UAL2106 IAH → EWR Jul 24, 03:20 UTCJul 24, 07:15 UTC3h 55m
2026-07-23 UAL706 LAX → ORD Jul 23, 21:55 UTCJul 24, 01:15 UTC3h 20m
2026-07-23 UAL2440 ORD → AUS Jul 23, 16:30 UTCJul 23, 19:45 UTC3h 15m
2026-07-23 UAL1775 SFO → PHX Jul 23, 12:30 UTCJul 23, 14:10 UTC1h 40m
2026-07-23 UAL1924 SAN → SFO Jul 23, 06:30 UTCJul 23, 09:30 UTC3h 0m
2026-07-23 UAL2610 IAD → PDX Jul 23, 02:30 UTCJul 23, 04:25 UTC1h 55m
2026-07-22 UAL374 EWR → PBI Jul 22, 20:15 UTCJul 23, 00:00 UTC3h 45m
2026-07-22 UAL2618 IAD → SFO Jul 22, 14:05 UTCJul 22, 17:45 UTC3h 40m
2026-07-21 UAL1801 BUR → SFO Jul 21, 22:30 UTCJul 22, 02:20 UTC3h 50m
2026-07-21 UAL2475 ORD → CLE Jul 21, 16:50 UTCJul 21, 19:35 UTC2h 45m
2026-07-21 UAL2280 LAX → BOS Jul 21, 12:50 UTCJul 21, 14:55 UTC2h 5m
2026-07-21 UAL729 - Jul 21, 07:30 UTCJul 21, 11:15 UTC3h 45m
2026-07-21 UAL2499 SEA → SFO Jul 21, 02:25 UTCJul 21, 06:10 UTC3h 45m
2026-07-21 UAL2499 SEA → SFO Jul 21, 02:28 UTCJul 21, 05:59 UTC3h 31m
2026-07-20 UAL2832 RSW → ORD Jul 20, 21:50 UTCJul 21, 00:20 UTC2h 29m
2026-07-20 UAL2832 RSW → ORD Jul 20, 21:44 UTCJul 21, 00:13 UTC2h 29m
2026-07-20 UAL2601 RSW → EWR Jul 20, 17:05 UTCJul 20, 20:30 UTC3h 25m
2026-07-20 UAL1714 LAS → IAH Jul 20, 12:10 UTCJul 20, 15:20 UTC3h 10m
2026-07-20 UAL259 DEN → MCO Jul 20, 00:20 UTCJul 20, 03:30 UTC3h 10m
2026-07-19 UAL377 ORD → DEN Jul 19, 03:50 UTCJul 19, 05:45 UTC1h 55m
2026-07-19 UAL675 - Jul 19, 01:45 UTCJul 19, 01:55 UTC10m
2026-07-18 UAL675 DEN → ORD Jul 18, 23:51 UTCJul 19, 01:28 UTC1h 37m
2026-07-18 UAL675 DEN → ORD Jul 18, 23:55 UTCJul 19, 01:55 UTC2h 0m
2026-07-18 UAL1150 ORD → DEN Jul 18, 18:30 UTCJul 18, 20:20 UTC1h 50m
2026-07-18 UAL2089 - Jul 18, 14:05 UTCJul 18, 16:15 UTC2h 10m
2026-07-18 UAL2089 - Jul 18, 11:45 UTCJul 18, 12:00 UTC15m
2026-07-18 UAL2089 SJU → ORD Jul 18, 11:53 UTCJul 18, 15:53 UTC4h 0m
2026-07-18 UAL695 EWR → CLT Jul 18, 00:25 UTCJul 18, 00:45 UTC20m
2026-07-17 UAL695 EWR → CLT Jul 17, 20:29 UTCJul 17, 22:25 UTC1h 55m
2026-07-17 UAL587 EWR → MSP Jul 17, 14:04 UTCJul 17, 18:15 UTC4h 10m
2026-07-16 UAL1107 - Jul 16, 22:25 UTCJul 17, 01:59 UTC3h 35m
2026-07-16 UAL2865 DEN → ORD Jul 16, 17:30 UTCJul 16, 19:25 UTC1h 55m
2026-07-16 UAL1714 MCO → DEN Jul 16, 12:14 UTCJul 16, 15:35 UTC3h 20m
2026-07-16 UAL259 DEN → MCO Jul 16, 00:35 UTCJul 16, 03:55 UTC3h 20m
2026-07-15 UAL1323 LAS → DEN Jul 15, 21:35 UTCJul 15, 23:05 UTC1h 30m

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 N74532 page for operator, model, and routing details .

Mode-S AA07F9 frequently asked

What is Mode-S code AA07F9?
AA07F9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N74532.
Where is Mode-S AA07F9 registered?
Mode-S code AA07F9 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 AA07F9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA07F9, octal 52403771, decimal 11,143,161.
What flights does AA07F9 operate?
Mode-S AA07F9 has broadcast 20 distinct callsigns, including UAL2494, UAL475, UAL2089, UAL695, UAL2361.