Apparatus

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sensors Mode-S transponder

AABD7F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N791UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AABD7F
Octal
52536577
Decimal
11,189,631
Country
US
Tail
N791UA
Type
B772
No current signal · last broadcast 6h ago
Flights observed
223
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AABD7F.

Country allocation

The ICAO 24-bit address AABD7F 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
UAL905 United Airlines 9 2026-06-03
UAL34 - 9 2026-07-14
UAL195 United Airlines 8 2026-06-28
UAL14 United Airlines 8 2026-06-05
UAL969 United Airlines 7 2026-06-10
UAL70 United Airlines 7 2026-07-05
UAL58 - 7 2026-07-08
UAL914 United Airlines 6 2026-06-25
UAL818 - 6 2026-06-17
UAL71 - 6 2026-07-06
UAL35 - 6 2026-07-13
UAL102 - 6 2026-06-27
UAL990 - 5 2026-06-24
UAL852 - 5 2026-07-12
UAL804 United Airlines 5 2026-04-17
UAL59 - 5 2026-07-09
UAL506 - 5 2026-06-23
UAL23 United Airlines 5 2026-06-02
UAL1777 - 5 2026-06-24
UAL968 United Airlines 4 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL34 - Jul 14, 08:10 UTCJul 14, 09:20 UTC1h 10m
2026-07-13 UAL35 SFO → KIX Jul 13, 18:45 UTCJul 14, 05:19 UTC10h 34m
2026-07-13 UAL35 SFO → KIX Jul 13, 18:50 UTCJul 14, 05:30 UTC10h 40m
2026-07-12 UAL852 - Jul 12, 09:15 UTCJul 12, 20:45 UTC11h 30m
2026-07-11 UAL853 SFO → TPE Jul 11, 10:10 UTCJul 11, 22:55 UTC12h 45m
2026-07-10 UAL673 - Jul 10, 15:25 UTCJul 11, 03:10 UTC11h 45m
2026-07-10 UAL672 SFO → BCN Jul 10, 01:40 UTCJul 10, 12:50 UTC11h 10m
2026-07-09 UAL59 FRA → SFO Jul 9, 11:20 UTCJul 9, 22:05 UTC10h 45m
2026-07-08 UAL58 SFO → FRA Jul 8, 21:52 UTCJul 9, 07:57 UTC10h 5m
2026-07-08 UAL58 - Jul 8, 21:55 UTCJul 9, 07:45 UTC9h 50m
2026-07-08 UAL34 KIX → SFO Jul 8, 08:15 UTCJul 8, 17:36 UTC9h 21m
2026-07-08 UAL34 - Jul 8, 08:10 UTCJul 8, 17:50 UTC9h 40m
2026-07-07 UAL35 SFO → KIX Jul 7, 18:50 UTCJul 8, 05:30 UTC10h 40m
2026-07-06 UAL2328 EWR → SFO Jul 6, 19:15 UTCJul 7, 00:40 UTC5h 25m
2026-07-06 UAL71 AMS → EWR Jul 6, 07:25 UTCJul 6, 14:55 UTC7h 30m
2026-07-05 UAL70 EWR → AMS Jul 5, 22:28 UTCJul 6, 04:25 UTC5h 57m
2026-07-05 UAL70 EWR → AMS Jul 5, 22:15 UTCJul 5, 23:55 UTC1h 40m
2026-07-05 UAL71 AMS → EWR Jul 5, 08:00 UTCJul 5, 15:30 UTC7h 30m
2026-07-04 UAL70 EWR → AMS Jul 4, 23:25 UTCJul 5, 05:40 UTC6h 15m
2026-07-04 UAL70 EWR → AMS Jul 4, 22:28 UTCJul 5, 05:29 UTC7h 1m
2026-07-04 UAL71 - Jul 4, 08:00 UTCJul 4, 09:30 UTC1h 30m
2026-07-04 UAL71 AMS → EWR Jul 4, 07:57 UTCJul 4, 15:31 UTC7h 34m
2026-07-04 UAL71 AMS → EWR Jul 4, 07:57 UTCJul 4, 15:24 UTC7h 27m
2026-07-03 UAL70 EWR → AMS Jul 3, 23:00 UTCJul 4, 05:10 UTC6h 10m
2026-07-03 UAL31 - Jul 3, 08:05 UTCJul 3, 16:30 UTC8h 25m
2026-07-02 UAL30 - Jul 2, 21:45 UTCJul 3, 04:35 UTC6h 50m
2026-07-02 UAL31 - Jul 2, 08:40 UTCJul 2, 16:50 UTC8h 10m
2026-07-01 UAL30 - Jul 1, 21:35 UTCJul 2, 04:45 UTC7h 10m
2026-06-30 UAL1333 SFO → EWR Jun 30, 21:05 UTCJul 1, 01:45 UTC4h 40m
2026-06-30 UAL34 KIX → SFO Jun 30, 08:15 UTCJun 30, 17:04 UTC8h 49m
2026-06-30 UAL34 - Jun 30, 08:05 UTCJun 30, 09:10 UTC1h 5m
2026-06-29 UAL35 SFO → KIX Jun 29, 18:34 UTCJun 30, 05:35 UTC11h 1m
2026-06-28 UAL195 MUC → SFO Jun 28, 10:30 UTCJun 28, 21:04 UTC10h 35m
2026-06-27 UAL102 - Jun 27, 21:59 UTCJun 28, 07:40 UTC9h 40m
2026-06-27 UAL879 - Jun 27, 09:09 UTCJun 27, 18:39 UTC9h 30m
2026-06-26 UAL918 IAD → LHR Jun 26, 22:56 UTCJun 27, 05:21 UTC6h 25m
2026-06-26 UAL918 IAD → LHR Jun 26, 22:55 UTCJun 27, 05:35 UTC6h 40m
2026-06-26 UAL943 LIS → IAD Jun 26, 11:45 UTCJun 26, 19:30 UTC7h 45m
2026-06-26 UAL942 IAD → LIS Jun 26, 03:18 UTCJun 26, 09:29 UTC6h 11m
2026-06-26 UAL942 IAD → LIS Jun 26, 03:34 UTCJun 26, 09:39 UTC6h 5m
2026-06-25 UAL914 CDG → IAD Jun 25, 11:50 UTCJun 25, 19:44 UTC7h 55m
2026-06-24 UAL990 SFO → CDG Jun 24, 23:10 UTCJun 25, 09:14 UTC10h 5m
2026-06-24 UAL1777 - Jun 24, 13:05 UTCJun 24, 18:34 UTC5h 30m
2026-06-24 UAL1141 SFO → EWR Jun 24, 06:25 UTCJun 24, 10:55 UTC4h 30m
2026-06-23 UAL506 - Jun 23, 15:30 UTCJun 24, 03:50 UTC12h 20m
2026-06-23 UAL506 FCO → SFO Jun 23, 15:27 UTCJun 24, 03:46 UTC12h 19m
2026-06-23 UAL507 SFO → FCO Jun 23, 02:19 UTCJun 23, 13:18 UTC10h 59m
2026-06-23 UAL507 - Jun 23, 02:04 UTCJun 23, 05:00 UTC2h 55m
2026-06-22 UAL916 AKL → SFO Jun 22, 02:14 UTCJun 22, 02:45 UTC30m
2026-06-22 UAL916 AKL → SFO Jun 22, 02:11 UTCJun 22, 13:40 UTC11h 29m

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 N791UA page for operator, model, and routing details .

Mode-S AABD7F frequently asked

What is Mode-S code AABD7F?
AABD7F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N791UA.
Where is Mode-S AABD7F registered?
Mode-S code AABD7F 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 AABD7F broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AABD7F, octal 52536577, decimal 11,189,631.
What flights does AABD7F operate?
Mode-S AABD7F has broadcast 20 distinct callsigns, including UAL905, UAL34, UAL195, UAL14, UAL969.