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 Jul 26, 18:10 UTC
Flights observed
253
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:10 UTC

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
UAL34 - 11 2026-07-14
UAL905 United Airlines 9 2026-06-03
UAL914 - 8 2026-07-22
UAL818 United Airlines 8 2026-07-20
UAL195 United Airlines 8 2026-06-28
UAL14 United Airlines 8 2026-06-05
UAL969 United Airlines 7 2026-06-10
UAL852 United Airlines 7 2026-07-26
UAL70 United Airlines 7 2026-07-05
UAL58 - 7 2026-07-08
UAL853 United Airlines 6 2026-07-25
UAL71 - 6 2026-07-06
UAL35 - 6 2026-07-13
UAL102 - 6 2026-06-27
UAL990 - 5 2026-06-24
UAL984 United Airlines 5 2026-07-24
UAL880 - 5 2026-07-21
UAL819 United Airlines 5 2026-07-19
UAL804 United Airlines 5 2026-04-17
UAL59 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL852 TPE → SAN Jul 26, 08:55 UTCJul 26, 18:05 UTC9h 10m
2026-07-26 UAL852 TPE → SAN Jul 26, 06:55 UTCJul 26, 07:10 UTC15m
2026-07-25 UAL853 SFO → TPE Jul 25, 19:20 UTCJul 25, 19:35 UTC15m
2026-07-25 UAL853 SFO → TPE Jul 25, 07:35 UTCJul 25, 18:05 UTC10h 30m
2026-07-24 UAL984 CDG → SFO Jul 24, 07:50 UTCJul 24, 18:35 UTC10h 45m
2026-07-23 UAL57 EWR → CDG Jul 23, 22:15 UTCJul 24, 04:35 UTC6h 20m
2026-07-23 UAL56 CDG → EWR Jul 23, 08:00 UTCJul 23, 15:15 UTC7h 15m
2026-07-22 UAL915 IAD → CDG Jul 22, 22:35 UTCJul 23, 05:30 UTC6h 55m
2026-07-22 UAL914 - Jul 22, 11:20 UTCJul 22, 11:45 UTC25m
2026-07-22 UAL914 CDG → IAD Jul 22, 11:21 UTCJul 22, 19:05 UTC7h 44m
2026-07-22 UAL915 IAD → CDG Jul 22, 01:55 UTCJul 22, 03:55 UTC2h 0m
2026-07-21 UAL919 LHR → IAD Jul 21, 11:45 UTCJul 21, 19:25 UTC7h 40m
2026-07-21 UAL880 - Jul 21, 02:10 UTCJul 21, 06:55 UTC4h 45m
2026-07-20 UAL880 - Jul 20, 22:15 UTCJul 21, 02:05 UTC3h 49m
2026-07-20 UAL880 IAH → LHR Jul 20, 22:12 UTCJul 21, 06:50 UTC8h 38m
2026-07-20 UAL818 EZE → IAH Jul 20, 00:30 UTCJul 20, 01:00 UTC30m
2026-07-20 UAL818 EZE → IAH Jul 20, 00:21 UTCJul 20, 10:23 UTC10h 2m
2026-07-19 UAL819 IAH → EZE Jul 19, 02:05 UTCJul 19, 11:25 UTC9h 20m
2026-07-19 UAL819 IAH → EZE Jul 19, 01:56 UTCJul 19, 11:19 UTC9h 23m
2026-07-18 UAL47 FRA → IAH Jul 18, 13:11 UTCJul 18, 23:15 UTC10h 4m
2026-07-18 UAL47 - Jul 18, 13:20 UTCJul 18, 23:20 UTC10h 0m
2026-07-18 UAL46 - Jul 18, 00:04 UTCJul 18, 09:15 UTC9h 11m
2026-07-17 UAL160 MUC → IAH Jul 17, 11:00 UTCJul 17, 21:20 UTC10h 20m
2026-07-16 UAL194 - Jul 16, 21:50 UTCJul 17, 08:00 UTC10h 10m
2026-07-16 UAL984 - Jul 16, 08:15 UTCJul 16, 19:05 UTC10h 50m
2026-07-16 UAL984 CDG → SFO Jul 16, 08:19 UTCJul 16, 18:57 UTC10h 38m
2026-07-15 UAL57 EWR → CDG Jul 15, 23:00 UTCJul 16, 06:10 UTC7h 10m
2026-07-14 UAL1333 SFO → EWR Jul 14, 23:40 UTCJul 15, 04:25 UTC4h 45m
2026-07-14 UAL34 KIX → SFO Jul 14, 08:15 UTCJul 14, 17:45 UTC9h 30m
2026-07-14 UAL34 KIX → SFO Jul 14, 08:15 UTCJul 14, 17:51 UTC9h 36m
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

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 Jul 26, 18:10 UTC.
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 UAL34, UAL905, UAL914, UAL818, UAL195.