Apparatus

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sensors Mode-S transponder

AA9D6E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N783UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AA9D6E
Octal
52516556
Decimal
11,181,422
Country
US
Tail
N783UA
Type
B772
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
245
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S AA9D6E.

Country allocation

The ICAO 24-bit address AA9D6E 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
UAL926 United Airlines 11 2026-07-26
UAL818 - 11 2026-07-05
UAL927 United Airlines 9 2026-07-26
UAL885 United Airlines 8 2026-06-14
UAL884 - 8 2026-06-13
UAL819 - 8 2026-07-04
UAL160 - 8 2026-07-03
UAL942 United Airlines 7 2026-06-11
UAL914 United Airlines 7 2026-06-26
UAL852 - 7 2026-06-21
UAL943 United Airlines 6 2026-06-11
UAL876 United Airlines 6 2026-07-23
UAL35 - 6 2026-07-15
UAL194 - 6 2026-07-02
UAL880 United Airlines 5 2026-07-05
UAL853 - 5 2026-06-20
UAL56 United Airlines 5 2026-07-19
UAL506 - 5 2026-07-15
UAL34 - 5 2026-07-16
UAL102 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL927 FRA → SFO Jul 26, 15:50 UTCJul 26, 20:55 UTC5h 5m
2026-07-26 UAL926 SFO → FRA Jul 26, 02:35 UTCJul 26, 12:10 UTC9h 36m
2026-07-25 UAL45 ZRH → SFO Jul 25, 12:27 UTCJul 25, 23:34 UTC11h 7m
2026-07-25 UAL45 ZRH → SFO Jul 25, 12:27 UTCJul 25, 23:38 UTC11h 11m
2026-07-25 UAL45 ZRH → SFO Jul 25, 12:20 UTCJul 25, 17:30 UTC5h 10m
2026-07-24 UAL44 SFO → ZRH Jul 24, 22:10 UTCJul 25, 08:15 UTC10h 5m
2026-07-23 UAL876 HND → SFO Jul 23, 07:45 UTCJul 23, 08:25 UTC40m
2026-07-23 UAL876 HND → SFO Jul 23, 07:25 UTCJul 23, 17:08 UTC9h 43m
2026-07-22 UAL131 EWR → HND Jul 22, 14:53 UTCJul 23, 04:58 UTC14h 5m
2026-07-22 UAL131 EWR → HND Jul 22, 15:10 UTCJul 23, 05:15 UTC14h 5m
2026-07-22 UAL148 GRU → EWR Jul 22, 00:20 UTCJul 22, 05:20 UTC5h 0m
2026-07-22 UAL148 GRU → EWR Jul 22, 00:21 UTCJul 22, 09:31 UTC9h 10m
2026-07-21 UAL149 EWR → GRU Jul 21, 01:10 UTCJul 21, 10:00 UTC8h 50m
2026-07-19 UAL56 CDG → EWR Jul 19, 14:15 UTCJul 19, 15:35 UTC1h 20m
2026-07-19 UAL56 CDG → EWR Jul 19, 14:19 UTCJul 19, 21:26 UTC7h 7m
2026-07-19 UAL57 EWR → CDG Jul 19, 03:18 UTCJul 19, 12:00 UTC8h 42m
2026-07-19 UAL57 - Jul 19, 05:00 UTCJul 19, 06:35 UTC1h 35m
2026-07-18 UAL22 DUB → EWR Jul 18, 09:00 UTCJul 18, 15:25 UTC6h 25m
2026-07-18 UAL23 EWR → DUB Jul 18, 00:39 UTCJul 18, 06:40 UTC6h 1m
2026-07-17 UAL1173 - Jul 17, 17:40 UTCJul 17, 21:00 UTC3h 20m
2026-07-17 UAL1173 SJU → EWR Jul 17, 17:39 UTCJul 17, 20:53 UTC3h 14m
2026-07-17 UAL2143 EWR → SJU Jul 17, 12:30 UTCJul 17, 15:40 UTC3h 10m
2026-07-16 UAL1333 SFO → EWR Jul 16, 21:27 UTCJul 17, 02:23 UTC4h 56m
2026-07-16 UAL1333 - Jul 16, 21:40 UTCJul 17, 02:25 UTC4h 45m
2026-07-16 UAL34 KIX → SFO Jul 16, 08:10 UTCJul 16, 18:00 UTC9h 50m
2026-07-15 UAL35 SFO → KIX Jul 15, 18:35 UTCJul 16, 05:05 UTC10h 30m
2026-07-15 UAL35 - Jul 15, 18:40 UTCJul 15, 19:45 UTC1h 5m
2026-07-15 UAL506 - Jul 15, 03:30 UTCJul 15, 03:35 UTC5m
2026-07-14 UAL506 - Jul 14, 15:10 UTCJul 14, 18:05 UTC2h 55m
2026-07-14 UAL506 FCO → SFO Jul 14, 14:57 UTCJul 15, 03:14 UTC12h 17m
2026-07-14 UAL507 - Jul 14, 00:30 UTCJul 14, 11:30 UTC11h 0m
2026-07-13 UAL1593 - Jul 13, 14:25 UTCJul 13, 19:15 UTC4h 50m
2026-07-12 UAL43 FRA → EWR Jul 12, 14:05 UTCJul 12, 21:45 UTC7h 40m
2026-07-12 UAL3034 EWR → FRA Jul 12, 04:54 UTCJul 12, 11:54 UTC7h 0m
2026-07-12 UAL3034 - Jul 12, 04:55 UTCJul 12, 05:30 UTC35m
2026-07-11 UAL366 SFO → EWR Jul 11, 21:17 UTCJul 12, 02:22 UTC5h 5m
2026-07-11 UAL366 SFO → EWR Jul 11, 21:20 UTCJul 12, 02:25 UTC5h 5m
2026-07-11 UAL1336 - Jul 11, 13:50 UTCJul 11, 19:00 UTC5h 10m
2026-07-10 UAL366 SFO → EWR Jul 10, 23:00 UTCJul 11, 03:35 UTC4h 35m
2026-07-09 UAL195 - Jul 9, 10:30 UTCJul 9, 21:40 UTC11h 10m
2026-07-09 UAL102 - Jul 9, 08:15 UTCJul 9, 08:20 UTC5m
2026-07-08 UAL102 - Jul 8, 22:30 UTCJul 9, 07:30 UTC9h 0m
2026-07-08 UAL102 IAH → MUC Jul 8, 22:32 UTCJul 9, 07:56 UTC9h 24m
2026-07-08 UAL879 - Jul 8, 09:30 UTCJul 8, 18:55 UTC9h 25m
2026-07-07 UAL918 IAD → LHR Jul 7, 23:11 UTCJul 8, 05:57 UTC6h 46m
2026-07-07 UAL918 - Jul 7, 23:10 UTCJul 8, 01:10 UTC2h 0m
2026-07-07 UAL919 - Jul 7, 11:40 UTCJul 7, 18:50 UTC7h 10m
2026-07-05 UAL880 IAH → LHR Jul 5, 21:55 UTCJul 6, 06:35 UTC8h 40m
2026-07-05 UAL818 - Jul 5, 00:15 UTCJul 5, 01:30 UTC1h 15m
2026-07-05 UAL818 EZE → IAH Jul 5, 00:16 UTCJul 5, 10:05 UTC9h 49m

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 N783UA page for operator, model, and routing details .

Mode-S AA9D6E frequently asked

What is Mode-S code AA9D6E?
AA9D6E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N783UA.
Where is Mode-S AA9D6E registered?
Mode-S code AA9D6E 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 AA9D6E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA9D6E, octal 52516556, decimal 11,181,422.
What flights does AA9D6E operate?
Mode-S AA9D6E has broadcast 20 distinct callsigns, including UAL926, UAL818, UAL927, UAL885, UAL884.