Apparatus

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sensors Mode-S transponder

AA9300

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N78009 · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AA9300
Octal
52511400
Decimal
11,178,752
Country
US
Tail
N78009
Type
B772
No current signal · last broadcast 15d ago
Flights observed
169
Distinct callsigns
20
Country
US
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S AA9300.

Country allocation

The ICAO 24-bit address AA9300 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
UAL803 United Airlines 7 2026-07-25
UAL131 - 7 2026-07-17
UAL984 United Airlines 6 2026-06-03
UAL875 United Airlines 6 2026-07-23
UAL804 United Airlines 6 2026-07-24
UAL130 United Airlines 6 2026-07-26
UAL949 United Airlines 5 2026-06-04
UAL948 United Airlines 5 2026-06-04
UAL880 United Airlines 5 2026-06-18
UAL195 United Airlines 5 2026-07-07
UAL927 - 4 2026-06-14
UAL926 - 4 2026-06-14
UAL55 United Airlines 4 2026-06-02
UAL194 - 4 2026-06-15
UAL160 - 4 2026-06-16
UAL102 - 4 2026-07-06
UAL919 United Airlines 3 2026-05-29
UAL879 - 3 2026-06-19
UAL876 - 3 2026-07-11
UAL819 - 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL130 HND → EWR Jul 26, 09:10 UTCJul 26, 09:55 UTC45m
2026-07-26 UAL130 HND → EWR Jul 26, 09:10 UTCJul 26, 21:46 UTC12h 36m
2026-07-25 UAL803 IAD → HND Jul 25, 17:15 UTCJul 26, 06:55 UTC13h 41m
2026-07-25 UAL803 IAD → HND Jul 25, 17:10 UTCJul 26, 06:51 UTC13h 41m
2026-07-24 UAL804 HND → IAD Jul 24, 07:05 UTCJul 24, 19:15 UTC12h 10m
2026-07-23 UAL875 SFO → HND Jul 23, 18:50 UTCJul 24, 04:40 UTC9h 50m
2026-07-22 UAL2328 ORD → SFO Jul 22, 19:15 UTCJul 23, 00:50 UTC5h 35m
2026-07-22 UAL71 AMS → EWR Jul 22, 12:35 UTCJul 22, 14:45 UTC2h 10m
2026-07-21 UAL70 EWR → AMS Jul 21, 22:35 UTCJul 22, 05:05 UTC6h 30m
2026-07-21 UAL121 BCN → EWR Jul 21, 11:00 UTCJul 21, 18:50 UTC7h 50m
2026-07-21 UAL120 EWR → BCN Jul 21, 01:10 UTCJul 21, 08:15 UTC7h 5m
2026-07-21 UAL120 EWR → BCN Jul 21, 01:00 UTCJul 21, 08:11 UTC7h 11m
2026-07-20 UAL130 HND → EWR Jul 20, 09:20 UTCJul 20, 21:45 UTC12h 25m
2026-07-19 UAL803 IAD → HND Jul 19, 17:20 UTCJul 20, 06:45 UTC13h 25m
2026-07-18 UAL804 HND → IAD Jul 18, 07:10 UTCJul 18, 19:36 UTC12h 26m
2026-07-18 UAL804 HND → IAD Jul 18, 07:15 UTCJul 18, 19:35 UTC12h 20m
2026-07-17 UAL131 EWR → HND Jul 17, 14:53 UTCJul 18, 04:07 UTC13h 14m
2026-07-17 UAL131 - Jul 17, 14:55 UTCJul 17, 16:00 UTC1h 5m
2026-07-17 UAL148 GRU → EWR Jul 17, 00:35 UTCJul 17, 09:15 UTC8h 40m
2026-07-17 UAL148 GRU → EWR Jul 17, 00:31 UTCJul 17, 09:20 UTC8h 49m
2026-07-16 UAL149 EWR → GRU Jul 16, 01:41 UTCJul 16, 10:35 UTC8h 54m
2026-07-16 UAL149 - Jul 16, 01:50 UTCJul 16, 10:40 UTC8h 50m
2026-07-15 UAL130 HND → EWR Jul 15, 09:30 UTCJul 15, 21:55 UTC12h 25m
2026-07-14 UAL803 IAD → HND Jul 14, 17:30 UTCJul 15, 06:40 UTC13h 9m
2026-07-13 UAL804 HND → IAD Jul 13, 09:20 UTCJul 13, 21:25 UTC12h 5m
2026-07-12 UAL131 EWR → HND Jul 12, 14:53 UTCJul 13, 03:51 UTC12h 58m
2026-07-12 UAL131 - Jul 12, 14:45 UTCJul 12, 17:35 UTC2h 50m
2026-07-12 UAL1141 - Jul 12, 05:50 UTCJul 12, 10:25 UTC4h 35m
2026-07-11 UAL876 - Jul 11, 11:45 UTCJul 11, 21:05 UTC9h 20m
2026-07-10 UAL131 SFO → HND Jul 10, 22:40 UTCJul 11, 09:30 UTC10h 50m
2026-07-10 UAL131 EWR → SFO Jul 10, 14:53 UTCJul 10, 20:14 UTC5h 21m
2026-07-10 UAL131 - Jul 10, 14:45 UTCJul 10, 20:20 UTC5h 35m
2026-07-10 UAL1333 SFO → EWR Jul 10, 00:35 UTCJul 10, 04:55 UTC4h 20m
2026-07-09 UAL1593 - Jul 9, 16:50 UTCJul 9, 22:40 UTC5h 50m
2026-07-09 UAL1141 SFO → EWR Jul 9, 06:30 UTCJul 9, 10:55 UTC4h 25m
2026-07-08 UAL506 - Jul 8, 14:20 UTCJul 9, 02:35 UTC12h 15m
2026-07-08 UAL507 - Jul 8, 00:35 UTCJul 8, 11:45 UTC11h 10m
2026-07-07 UAL195 MUC → SFO Jul 7, 10:10 UTCJul 7, 12:00 UTC1h 50m
2026-07-07 UAL195 MUC → SFO Jul 7, 10:02 UTCJul 7, 21:30 UTC11h 28m
2026-07-06 UAL102 - Jul 6, 22:35 UTCJul 7, 08:05 UTC9h 30m
2026-06-22 UAL3867 - Jun 22, 02:40 UTCJun 22, 02:59 UTC20m
2026-06-22 UAL3867 IAH → IAH Jun 22, 02:21 UTCJun 22, 03:01 UTC40m
2026-06-19 UAL102 - Jun 19, 23:34 UTCJun 20, 00:14 UTC40m
2026-06-19 UAL879 - Jun 19, 09:24 UTCJun 19, 18:49 UTC9h 25m
2026-06-18 UAL880 IAH → LHR Jun 18, 21:50 UTCJun 19, 06:44 UTC8h 54m
2026-06-18 UAL818 - Jun 18, 00:10 UTCJun 18, 10:05 UTC9h 55m
2026-06-17 UAL819 IAH → EZE Jun 17, 05:30 UTCJun 17, 10:42 UTC5h 12m
2026-06-17 UAL819 - Jun 17, 01:40 UTCJun 17, 04:35 UTC2h 55m
2026-06-16 UAL160 - Jun 16, 10:45 UTCJun 16, 21:30 UTC10h 46m
2026-06-16 UAL160 MUC → IAH Jun 16, 10:39 UTCJun 16, 21:25 UTC10h 46m

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 N78009 page for operator, model, and routing details .

Mode-S AA9300 frequently asked

What is Mode-S code AA9300?
AA9300 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N78009.
Where is Mode-S AA9300 registered?
Mode-S code AA9300 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 AA9300 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA9300, octal 52511400, decimal 11,178,752.
What flights does AA9300 operate?
Mode-S AA9300 has broadcast 20 distinct callsigns, including UAL803, UAL131, UAL984, UAL875, UAL804.