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sensors Mode-S transponder

AAC136

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N792UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AAC136
Octal
52540466
Decimal
11,190,582
Country
US
Tail
N792UA
Type
B772
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
254
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AAC136.

Country allocation

The ICAO 24-bit address AAC136 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
UAL56 United Airlines 10 2026-06-08
UAL194 - 10 2026-07-12
UAL59 - 9 2026-06-26
UAL160 - 9 2026-07-13
UAL933 - 8 2026-07-17
UAL915 United Airlines 8 2026-06-07
UAL19 United Airlines 8 2026-05-09
UAL879 United Airlines 7 2026-07-21
UAL58 - 7 2026-06-25
UAL943 United Airlines 6 2026-06-19
UAL927 - 6 2026-07-16
UAL926 - 6 2026-07-17
UAL880 - 6 2026-07-09
UAL2328 United Airlines 6 2026-04-25
UAL18 United Airlines 6 2026-05-09
UAL942 - 5 2026-06-19
UAL852 United Airlines 5 2026-05-20
UAL698 United Airlines 5 2026-04-27
UAL45 United Airlines 5 2026-07-26
UAL35 United Airlines 5 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL45 ZRH → SFO Jul 26, 12:00 UTCJul 26, 21:30 UTC9h 30m
2026-07-25 UAL44 SFO → ZRH Jul 25, 22:05 UTCJul 26, 08:00 UTC9h 56m
2026-07-24 UAL673 SFO → BOS Jul 24, 14:35 UTCJul 24, 23:30 UTC8h 55m
2026-07-24 UAL673 SFO → BOS Jul 24, 14:31 UTCJul 25, 02:09 UTC11h 38m
2026-07-24 UAL672 EWR → ATL Jul 24, 01:29 UTCJul 24, 12:09 UTC10h 40m
2026-07-24 UAL672 EWR → ATL Jul 24, 01:30 UTCJul 24, 04:00 UTC2h 30m
2026-07-23 UAL195 MUC → SFO Jul 23, 10:05 UTCJul 23, 21:25 UTC11h 20m
2026-07-23 UAL195 MUC → SFO Jul 23, 10:02 UTCJul 23, 21:20 UTC11h 18m
2026-07-22 UAL102 IAH → MUC Jul 22, 22:15 UTCJul 23, 07:40 UTC9h 25m
2026-07-21 UAL879 LHR → IAH Jul 21, 23:35 UTCJul 22, 19:05 UTC19h 30m
2026-07-21 UAL879 LHR → IAH Jul 21, 21:55 UTCJul 22, 19:05 UTC21h 10m
2026-07-21 UAL818 EZE → IAH Jul 21, 01:25 UTCJul 21, 11:25 UTC10h 0m
2026-07-20 UAL819 IAH → EZE Jul 20, 02:20 UTCJul 20, 11:50 UTC9h 30m
2026-07-19 UAL4 LHR → IAH Jul 19, 13:40 UTCJul 19, 22:50 UTC9h 10m
2026-07-19 UAL5 IAH → LHR Jul 19, 02:25 UTCJul 19, 11:35 UTC9h 10m
2026-07-19 UAL5 IAH → LHR Jul 19, 02:31 UTCJul 19, 11:28 UTC8h 57m
2026-07-18 UAL4 LHR → IAH Jul 18, 14:00 UTCJul 18, 15:10 UTC1h 10m
2026-07-18 UAL4 LHR → IAH Jul 18, 13:45 UTCJul 18, 23:01 UTC9h 16m
2026-07-18 UAL924 - Jul 18, 03:10 UTCJul 18, 05:05 UTC1h 55m
2026-07-18 UAL924 IAD → LHR Jul 18, 02:43 UTCJul 18, 09:57 UTC7h 14m
2026-07-17 UAL933 FRA → IAD Jul 17, 15:49 UTCJul 17, 23:45 UTC7h 55m
2026-07-17 UAL933 FRA → IAD Jul 17, 15:31 UTCJul 17, 23:43 UTC8h 12m
2026-07-17 UAL926 SFO → FRA Jul 17, 02:34 UTCJul 17, 12:35 UTC10h 0m
2026-07-16 UAL927 - Jul 16, 03:05 UTCJul 16, 03:10 UTC5m
2026-07-15 UAL927 - Jul 15, 15:55 UTCJul 15, 18:50 UTC2h 55m
2026-07-15 UAL927 FRA → SFO Jul 15, 15:51 UTCJul 16, 02:47 UTC10h 56m
2026-07-15 UAL932 IAD → FRA Jul 15, 03:00 UTCJul 15, 10:25 UTC7h 25m
2026-07-14 UAL925 - Jul 14, 16:20 UTCJul 14, 23:30 UTC7h 9m
2026-07-14 UAL5 - Jul 14, 02:20 UTCJul 14, 11:30 UTC9h 10m
2026-07-14 UAL5 IAH → LHR Jul 14, 02:26 UTCJul 14, 11:21 UTC8h 55m
2026-07-13 UAL160 - Jul 13, 22:55 UTCJul 13, 23:55 UTC1h 0m
2026-07-13 UAL160 MUC → AUS Jul 13, 10:45 UTCJul 13, 21:30 UTC10h 45m
2026-07-12 UAL194 SFO → MUC Jul 12, 21:25 UTCJul 13, 07:45 UTC10h 20m
2026-07-12 UAL984 CDG → SFO Jul 12, 07:39 UTCJul 12, 18:12 UTC10h 33m
2026-07-12 UAL984 - Jul 12, 07:20 UTCJul 12, 09:00 UTC1h 40m
2026-07-11 UAL57 EWR → CDG Jul 11, 22:15 UTCJul 12, 04:40 UTC6h 25m
2026-07-11 UAL31 MUC → EWR Jul 11, 08:05 UTCJul 11, 16:20 UTC8h 15m
2026-07-11 UAL31 MUC → EWR Jul 11, 08:07 UTCJul 11, 16:17 UTC8h 10m
2026-07-10 UAL30 EWR → MUC Jul 10, 21:48 UTCJul 11, 04:29 UTC6h 41m
2026-07-10 UAL30 - Jul 10, 21:35 UTCJul 10, 22:55 UTC1h 20m
2026-07-10 UAL905 LHR → EWR Jul 10, 09:30 UTCJul 10, 16:50 UTC7h 20m
2026-07-10 UAL905 LHR → EWR Jul 10, 09:05 UTCJul 10, 16:53 UTC7h 48m
2026-07-09 UAL880 - Jul 9, 22:05 UTCJul 10, 01:15 UTC3h 10m
2026-07-09 UAL880 IAH → LHR Jul 9, 21:52 UTCJul 10, 06:36 UTC8h 44m
2026-07-09 UAL818 - Jul 9, 00:15 UTCJul 9, 10:00 UTC9h 45m
2026-07-08 UAL819 - Jul 8, 03:00 UTCJul 8, 11:30 UTC8h 30m
2026-07-08 UAL819 IAH → EZE Jul 8, 01:54 UTCJul 8, 12:18 UTC10h 24m
2026-07-07 UAL47 FRA → IAH Jul 7, 12:26 UTCJul 7, 22:53 UTC10h 27m
2026-07-07 UAL47 - Jul 7, 12:40 UTCJul 7, 23:00 UTC10h 20m
2026-07-07 UAL46 - Jul 7, 00:45 UTCJul 7, 10:10 UTC9h 25m

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 N792UA page for operator, model, and routing details .

Mode-S AAC136 frequently asked

What is Mode-S code AAC136?
AAC136 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N792UA.
Where is Mode-S AAC136 registered?
Mode-S code AAC136 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 AAC136 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAC136, octal 52540466, decimal 11,190,582.
What flights does AAC136 operate?
Mode-S AAC136 has broadcast 20 distinct callsigns, including UAL56, UAL194, UAL59, UAL160, UAL933.