Apparatus

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sensors Mode-S transponder

AAD012

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N796UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AAD012
Octal
52550022
Decimal
11,194,386
Country
US
Tail
N796UA
Type
B772
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
232
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AAD012.

Country allocation

The ICAO 24-bit address AAD012 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
UAL506 - 10 2026-06-17
UAL4 United Airlines 8 2026-07-26
UAL889 United Airlines 7 2026-06-21
UAL888 United Airlines 7 2026-06-20
UAL507 - 7 2026-06-17
UAL195 United Airlines 7 2026-06-26
UAL18 - 7 2026-07-15
UAL948 United Airlines 6 2026-06-03
UAL914 - 6 2026-07-21
UAL885 United Airlines 6 2026-07-25
UAL884 United Airlines 6 2026-07-24
UAL819 - 6 2026-06-24
UAL818 - 6 2026-06-25
UAL56 - 6 2026-07-09
UAL47 - 6 2026-07-04
UAL46 - 6 2026-07-04
UAL924 United Airlines 5 2026-07-26
UAL5 - 5 2026-07-06
UAL35 United Airlines 5 2026-05-17
UAL31 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL4 LHR → IAH Jul 26, 13:00 UTCJul 26, 22:30 UTC9h 30m
2026-07-26 UAL924 IAD → LHR Jul 26, 02:50 UTCJul 26, 09:15 UTC6h 26m
2026-07-25 UAL885 FCO → IAD Jul 25, 09:05 UTCJul 25, 18:05 UTC9h 0m
2026-07-24 UAL884 IAD → FCO Jul 24, 22:25 UTCJul 25, 00:20 UTC1h 55m
2026-07-24 UAL884 IAD → FCO Jul 24, 21:58 UTCJul 25, 06:23 UTC8h 25m
2026-07-24 UAL919 LHR → IAD Jul 24, 11:40 UTCJul 24, 18:30 UTC6h 50m
2026-07-24 UAL919 LHR → IAD Jul 24, 11:40 UTCJul 24, 18:51 UTC7h 11m
2026-07-23 UAL918 IAD → LHR Jul 23, 22:56 UTCJul 24, 05:30 UTC6h 34m
2026-07-23 UAL918 IAD → LHR Jul 23, 23:05 UTCJul 24, 05:35 UTC6h 30m
2026-07-23 UAL919 LHR → IAD Jul 23, 11:50 UTCJul 23, 18:55 UTC7h 5m
2026-07-22 UAL918 IAD → LHR Jul 22, 22:55 UTCJul 23, 05:30 UTC6h 35m
2026-07-22 UAL885 FCO → IAD Jul 22, 10:20 UTCJul 22, 18:10 UTC7h 50m
2026-07-21 UAL885 FCO → IAD Jul 21, 22:55 UTCJul 22, 18:10 UTC19h 15m
2026-07-21 UAL884 IAD → FCO Jul 21, 21:58 UTCJul 22, 07:08 UTC9h 10m
2026-07-21 UAL914 - Jul 21, 10:55 UTCJul 21, 18:30 UTC7h 35m
2026-07-21 UAL914 CDG → IAD Jul 21, 10:59 UTCJul 21, 18:57 UTC7h 58m
2026-07-20 UAL990 SFO → CDG Jul 20, 22:30 UTCJul 21, 08:30 UTC10h 0m
2026-07-18 UAL927 FRA → SFO Jul 18, 16:10 UTCJul 19, 03:15 UTC11h 5m
2026-07-18 UAL927 FRA → SFO Jul 18, 15:51 UTCJul 19, 03:10 UTC11h 19m
2026-07-18 UAL932 IAD → FRA Jul 18, 02:40 UTCJul 18, 10:05 UTC7h 26m
2026-07-17 UAL914 - Jul 17, 10:44 UTCJul 17, 12:15 UTC1h 30m
2026-07-17 UAL914 CDG → IAD Jul 17, 10:49 UTCJul 17, 18:13 UTC7h 24m
2026-07-16 UAL990 SFO → CDG Jul 16, 22:30 UTCJul 17, 08:25 UTC9h 55m
2026-07-15 UAL131 - Jul 15, 23:10 UTCJul 16, 04:15 UTC5h 5m
2026-07-15 UAL18 MXP → EWR Jul 15, 08:06 UTCJul 15, 16:06 UTC8h 0m
2026-07-15 UAL18 MXP → EWR Jul 15, 08:06 UTCJul 15, 16:08 UTC8h 2m
2026-07-15 UAL18 - Jul 15, 07:55 UTCJul 15, 08:30 UTC35m
2026-07-14 UAL19 EWR → MXP Jul 14, 22:05 UTCJul 15, 05:20 UTC7h 14m
2026-07-14 UAL55 - Jul 14, 11:15 UTCJul 14, 18:30 UTC7h 15m
2026-07-14 UAL54 EWR → CDG Jul 14, 02:04 UTCJul 14, 08:50 UTC6h 46m
2026-07-14 UAL54 - Jul 14, 02:00 UTCJul 14, 03:45 UTC1h 45m
2026-07-13 UAL31 - Jul 13, 08:05 UTCJul 13, 08:30 UTC25m
2026-07-13 UAL31 MUC → EWR Jul 13, 08:07 UTCJul 13, 16:11 UTC8h 4m
2026-07-13 UAL31 MUC → EWR Jul 13, 08:07 UTCJul 13, 16:14 UTC8h 7m
2026-07-12 UAL30 EWR → MUC Jul 12, 21:48 UTCJul 13, 04:53 UTC7h 5m
2026-07-12 UAL30 - Jul 12, 21:40 UTCJul 12, 22:30 UTC50m
2026-07-12 UAL31 MUC → EWR Jul 12, 08:05 UTCJul 12, 16:10 UTC8h 5m
2026-07-12 UAL31 MUC → EWR Jul 12, 08:07 UTCJul 12, 16:11 UTC8h 4m
2026-07-11 UAL30 EWR → MUC Jul 11, 22:53 UTCJul 12, 06:14 UTC7h 21m
2026-07-11 UAL30 - Jul 11, 22:55 UTCJul 12, 04:30 UTC5h 35m
2026-07-11 UAL22 - Jul 11, 08:50 UTCJul 11, 15:30 UTC6h 40m
2026-07-11 UAL22 DUB → EWR Jul 11, 08:50 UTCJul 11, 15:37 UTC6h 47m
2026-07-11 UAL23 - Jul 11, 00:35 UTCJul 11, 06:15 UTC5h 40m
2026-07-10 UAL1141 SFO → EWR Jul 10, 06:40 UTCJul 10, 11:05 UTC4h 25m
2026-07-09 UAL2328 - Jul 9, 19:30 UTCJul 10, 01:10 UTC5h 40m
2026-07-09 UAL56 - Jul 9, 09:00 UTCJul 9, 10:30 UTC1h 30m
2026-07-09 UAL56 CDG → EWR Jul 9, 09:04 UTCJul 9, 16:16 UTC7h 12m
2026-07-09 UAL56 CDG → EWR Jul 9, 09:04 UTCJul 9, 16:15 UTC7h 11m
2026-07-08 UAL915 IAD → CDG Jul 8, 23:50 UTCJul 9, 06:55 UTC7h 5m
2026-07-08 UAL943 LIS → IAD Jul 8, 11:55 UTCJul 8, 19:00 UTC7h 5m

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 N796UA page for operator, model, and routing details .

Mode-S AAD012 frequently asked

What is Mode-S code AAD012?
AAD012 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N796UA.
Where is Mode-S AAD012 registered?
Mode-S code AAD012 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 AAD012 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAD012, octal 52550022, decimal 11,194,386.
What flights does AAD012 operate?
Mode-S AAD012 has broadcast 20 distinct callsigns, including UAL506, UAL4, UAL889, UAL888, UAL507.