Apparatus

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sensors Mode-S transponder

AA6B9F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N77014 · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AA6B9F
Octal
52465637
Decimal
11,168,671
Country
US
Tail
N77014
Type
B772
Transponder active on ground
Flights observed
262
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S AA6B9F.

Country allocation

The ICAO 24-bit address AA6B9F 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
UAL803 United Airlines 11 2026-07-03
UAL130 - 11 2026-07-04
UAL919 - 10 2026-07-06
UAL506 United Airlines 9 2026-07-24
UAL148 - 9 2026-07-01
UAL889 United Airlines 8 2026-07-23
UAL54 - 8 2026-07-05
UAL14 - 8 2026-06-27
UAL149 - 7 2026-06-30
UAL942 - 6 2026-07-07
UAL932 United Airlines 6 2026-05-18
UAL915 - 6 2026-06-15
UAL888 United Airlines 6 2026-07-22
UAL507 United Airlines 6 2026-07-24
UAL943 United Airlines 5 2026-07-07
UAL875 United Airlines 5 2026-07-26
UAL852 United Airlines 5 2026-07-17
UAL56 United Airlines 5 2026-06-16
UAL55 - 5 2026-06-17
UAL195 - 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL804 HND → IAD Jul 26, 11:25 UTCJul 26, 20:25 UTC9h 0m
2026-07-26 UAL875 SFO → HND Jul 26, 08:10 UTCJul 26, 08:30 UTC20m
2026-07-25 UAL875 SFO → HND Jul 25, 18:55 UTCJul 26, 05:25 UTC10h 30m
2026-07-24 UAL506 MSN → DEN Jul 24, 14:35 UTCJul 24, 17:35 UTC3h 0m
2026-07-24 UAL506 MSN → DEN Jul 24, 14:07 UTCJul 25, 02:40 UTC12h 33m
2026-07-24 UAL507 DEN → LGA Jul 24, 00:25 UTCJul 24, 11:30 UTC11h 5m
2026-07-23 UAL889 PEK → SFO Jul 23, 11:20 UTCJul 23, 13:15 UTC1h 55m
2026-07-23 UAL889 PEK → SFO Jul 23, 03:50 UTCJul 23, 22:05 UTC18h 15m
2026-07-23 UAL889 PEK → SFO Jul 23, 03:25 UTCJul 23, 22:05 UTC18h 40m
2026-07-22 UAL888 SFO → PEK Jul 22, 18:20 UTCJul 23, 05:45 UTC11h 25m
2026-07-22 UAL888 SFO → PEK Jul 22, 18:15 UTCJul 23, 06:51 UTC12h 36m
2026-07-22 UAL97 BNE → SFO Jul 22, 00:50 UTCJul 22, 13:25 UTC12h 35m
2026-07-21 UAL96 SFO → BNE Jul 21, 07:00 UTCJul 21, 20:25 UTC13h 25m
2026-07-20 UAL506 MSN → DEN Jul 20, 14:35 UTCJul 21, 02:55 UTC12h 20m
2026-07-20 UAL507 DEN → LGA Jul 20, 00:19 UTCJul 20, 11:18 UTC10h 59m
2026-07-20 UAL507 DEN → LGA Jul 20, 00:15 UTCJul 20, 09:45 UTC9h 30m
2026-07-19 UAL889 - Jul 19, 10:40 UTCJul 19, 12:15 UTC1h 35m
2026-07-19 UAL889 - Jul 19, 03:40 UTCJul 19, 21:05 UTC17h 25m
2026-07-18 UAL888 - Jul 18, 18:50 UTCJul 19, 06:00 UTC11h 10m
2026-07-18 UAL888 SFO → PEK Jul 18, 18:15 UTCJul 19, 07:04 UTC12h 49m
2026-07-17 UAL852 TPE → SAN Jul 17, 08:49 UTCJul 17, 18:29 UTC9h 40m
2026-07-17 UAL852 TPE → SAN Jul 17, 06:54 UTCJul 17, 07:14 UTC20m
2026-07-16 UAL853 - Jul 16, 19:35 UTCJul 16, 19:50 UTC15m
2026-07-16 UAL853 - Jul 16, 07:50 UTCJul 16, 18:25 UTC10h 35m
2026-07-15 UAL506 - Jul 15, 14:25 UTCJul 15, 17:20 UTC2h 55m
2026-07-15 UAL506 FCO → SFO Jul 15, 14:07 UTCJul 16, 02:28 UTC12h 21m
2026-07-15 UAL506 FCO → SFO Jul 15, 14:07 UTCJul 16, 02:32 UTC12h 25m
2026-07-15 UAL507 - Jul 15, 00:45 UTCJul 15, 11:50 UTC11h 5m
2026-07-14 UAL889 - Jul 14, 10:45 UTCJul 14, 21:10 UTC10h 25m
2026-07-13 UAL888 - Jul 13, 18:30 UTCJul 14, 05:40 UTC11h 10m
2026-07-11 UAL506 - Jul 11, 14:35 UTCJul 12, 03:01 UTC12h 25m
2026-07-11 UAL507 - Jul 11, 00:20 UTCJul 11, 11:15 UTC10h 55m
2026-07-10 UAL195 - Jul 10, 10:00 UTCJul 10, 12:25 UTC2h 25m
2026-07-10 UAL195 MUC → SFO Jul 10, 10:02 UTCJul 10, 21:10 UTC11h 8m
2026-07-09 UAL102 - Jul 9, 22:00 UTCJul 10, 07:30 UTC9h 30m
2026-07-09 UAL102 IAH → MUC Jul 9, 22:02 UTCJul 10, 07:27 UTC9h 25m
2026-07-08 UAL4 - Jul 8, 13:10 UTCJul 8, 22:45 UTC9h 35m
2026-07-08 UAL924 IAD → LHR Jul 8, 03:00 UTCJul 8, 09:55 UTC6h 55m
2026-07-08 UAL924 IAD → LHR Jul 8, 02:42 UTCJul 8, 09:51 UTC7h 9m
2026-07-07 UAL943 LIS → IAD Jul 7, 16:05 UTCJul 7, 23:20 UTC7h 15m
2026-07-07 UAL942 IAD → LIS Jul 7, 07:35 UTCJul 7, 13:55 UTC6h 20m
2026-07-06 UAL919 - Jul 6, 11:45 UTCJul 6, 13:00 UTC1h 15m
2026-07-06 UAL919 LHR → IAD Jul 6, 11:40 UTCJul 6, 19:22 UTC7h 42m
2026-07-06 UAL919 LHR → IAD Jul 6, 11:40 UTCJul 6, 19:11 UTC7h 31m
2026-07-06 UAL918 IAD → LHR Jul 6, 01:35 UTCJul 6, 08:05 UTC6h 30m
2026-07-05 UAL914 CDG → IAD Jul 5, 13:09 UTCJul 5, 20:41 UTC7h 32m
2026-07-05 UAL914 CDG → IAD Jul 5, 13:09 UTCJul 5, 20:41 UTC7h 32m
2026-07-05 UAL54 EWR → CDG Jul 5, 02:24 UTCJul 5, 10:57 UTC8h 33m
2026-07-05 UAL54 - Jul 5, 04:15 UTCJul 5, 05:10 UTC55m
2026-07-04 UAL130 HND → EWR Jul 4, 09:55 UTCJul 4, 22:00 UTC12h 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 N77014 page for operator, model, and routing details .

Mode-S AA6B9F frequently asked

What is Mode-S code AA6B9F?
AA6B9F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N77014.
Where is Mode-S AA6B9F registered?
Mode-S code AA6B9F 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 AA6B9F broadcasting right now?
Mode-S AA6B9F is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA6B9F, octal 52465637, decimal 11,168,671.
What flights does AA6B9F operate?
Mode-S AA6B9F has broadcast 20 distinct callsigns, including UAL803, UAL130, UAL919, UAL506, UAL148.