Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AA6B9D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N77012 · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AA6B9D
Octal
52465635
Decimal
11,168,669
Country
US
Tail
N77012
Type
B772
No current signal · last broadcast 1d ago
Flights observed
176
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AA6B9D.

Country allocation

The ICAO 24-bit address AA6B9D 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
UAL59 - 7 2026-06-29
UAL2397 United Airlines 7 2026-04-17
UAL2238 United Airlines 7 2026-04-16
UAL804 - 6 2026-07-03
UAL58 - 6 2026-06-28
UAL933 United Airlines 5 2026-05-26
UAL803 United Airlines 5 2026-05-17
UAL22 United Airlines 5 2026-06-16
UAL97 - 4 2026-06-23
UAL927 - 4 2026-06-26
UAL918 United Airlines 4 2026-05-16
UAL57 United Airlines 4 2026-04-18
UAL46 - 4 2026-07-09
UAL131 - 4 2026-06-18
UAL130 United Airlines 4 2026-05-18
UAL96 - 3 2026-06-22
UAL943 - 3 2026-07-16
UAL942 - 3 2026-07-16
UAL926 - 3 2026-06-26
UAL889 United Airlines 3 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 UAL943 LIS → IAD Jul 16, 11:40 UTCJul 16, 19:05 UTC7h 25m
2026-07-16 UAL942 IAD → LIS Jul 16, 03:00 UTCJul 16, 09:15 UTC6h 15m
2026-07-14 UAL3926 - Jul 14, 04:35 UTCJul 14, 07:10 UTC2h 35m
2026-07-12 UAL4 - Jul 12, 13:10 UTCJul 12, 22:35 UTC9h 25m
2026-07-12 UAL924 IAD → LHR Jul 12, 02:46 UTCJul 12, 10:04 UTC7h 18m
2026-07-11 UAL925 LHR → IAD Jul 11, 16:20 UTCJul 12, 00:01 UTC7h 40m
2026-07-11 UAL5 - Jul 11, 01:55 UTCJul 11, 10:20 UTC8h 25m
2026-07-10 UAL47 - Jul 10, 12:25 UTCJul 10, 22:45 UTC10h 20m
2026-07-09 UAL46 - Jul 9, 23:45 UTCJul 10, 08:50 UTC9h 5m
2026-07-09 UAL879 - Jul 9, 09:20 UTCJul 9, 18:50 UTC9h 30m
2026-07-08 UAL880 - Jul 8, 22:20 UTCJul 9, 07:15 UTC8h 55m
2026-07-08 UAL818 - Jul 8, 08:10 UTCJul 8, 09:55 UTC1h 45m
2026-07-08 UAL818 - Jul 8, 00:05 UTCJul 8, 08:00 UTC7h 55m
2026-07-07 UAL819 - Jul 7, 06:50 UTCJul 7, 11:15 UTC4h 25m
2026-07-07 UAL819 - Jul 7, 02:00 UTCJul 7, 04:20 UTC2h 20m
2026-07-06 UAL47 FRA → IAH Jul 6, 12:30 UTCJul 6, 23:05 UTC10h 35m
2026-07-06 UAL46 - Jul 6, 00:05 UTCJul 6, 09:20 UTC9h 15m
2026-07-04 UAL4 - Jul 4, 12:55 UTCJul 4, 22:45 UTC9h 50m
2026-07-04 UAL924 IAD → LHR Jul 4, 03:40 UTCJul 4, 10:15 UTC6h 35m
2026-07-03 UAL804 HND → IAD Jul 3, 07:40 UTCJul 3, 19:50 UTC12h 10m
2026-07-02 UAL875 - Jul 2, 18:20 UTCJul 3, 04:40 UTC10h 20m
2026-06-30 UAL673 BCN → SFO Jun 30, 15:01 UTCJul 1, 02:24 UTC11h 23m
2026-06-30 UAL673 - Jun 30, 15:00 UTCJul 1, 02:40 UTC11h 40m
2026-06-30 UAL672 SFO → BCN Jun 30, 01:55 UTCJun 30, 12:45 UTC10h 50m
2026-06-29 UAL59 - Jun 29, 11:20 UTCJun 29, 13:09 UTC1h 50m
2026-06-29 UAL59 FRA → SFO Jun 29, 11:14 UTCJun 29, 21:25 UTC10h 11m
2026-06-29 UAL59 FRA → SFO Jun 29, 11:14 UTCJun 29, 21:41 UTC10h 27m
2026-06-28 UAL58 SFO → FRA Jun 28, 21:22 UTCJun 29, 07:32 UTC10h 10m
2026-06-28 UAL58 - Jun 28, 21:24 UTCJun 29, 00:20 UTC2h 55m
2026-06-28 UAL852 - Jun 28, 06:55 UTCJun 28, 17:55 UTC11h 0m
2026-06-27 UAL853 - Jun 27, 19:49 UTCJun 27, 20:14 UTC25m
2026-06-27 UAL853 - Jun 27, 07:30 UTCJun 27, 08:05 UTC35m
2026-06-26 UAL927 - Jun 26, 16:00 UTCJun 26, 17:40 UTC1h 40m
2026-06-26 UAL927 FRA → SFO Jun 26, 15:51 UTCJun 27, 02:34 UTC10h 43m
2026-06-26 UAL927 FRA → SFO Jun 26, 15:51 UTCJun 27, 02:38 UTC10h 47m
2026-06-26 UAL926 SFO → FRA Jun 26, 02:44 UTCJun 26, 12:52 UTC10h 8m
2026-06-26 UAL926 - Jun 26, 02:34 UTCJun 26, 13:04 UTC10h 30m
2026-06-23 UAL97 - Jun 23, 00:45 UTCJun 23, 01:15 UTC30m
2026-06-23 UAL97 BNE → SFO Jun 23, 00:43 UTCJun 23, 13:07 UTC12h 24m
2026-06-23 UAL97 BNE → SFO Jun 23, 00:43 UTCJun 23, 13:13 UTC12h 30m
2026-06-22 UAL96 SFO → BNE Jun 22, 07:40 UTCJun 22, 21:05 UTC13h 25m
2026-06-21 UAL927 - Jun 21, 15:44 UTCJun 22, 02:34 UTC10h 50m
2026-06-21 UAL926 SFO → FRA Jun 21, 02:35 UTCJun 21, 12:44 UTC10h 10m
2026-06-20 UAL45 ZRH → SFO Jun 20, 12:02 UTCJun 20, 23:08 UTC11h 6m
2026-06-20 UAL45 ZRH → SFO Jun 20, 11:54 UTCJun 20, 14:05 UTC2h 10m
2026-06-19 UAL44 SFO → ZRH Jun 19, 22:14 UTCJun 20, 08:39 UTC10h 25m
2026-06-19 UAL876 - Jun 19, 07:19 UTCJun 19, 17:09 UTC9h 50m
2026-06-18 UAL131 - Jun 18, 14:55 UTCJun 19, 04:10 UTC13h 14m
2026-06-17 UAL71 AMS → EWR Jun 17, 07:15 UTCJun 17, 14:20 UTC7h 5m
2026-06-16 UAL70 EWR → AMS Jun 16, 22:25 UTCJun 17, 04:45 UTC6h 20m

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 N77012 page for operator, model, and routing details .

Mode-S AA6B9D frequently asked

What is Mode-S code AA6B9D?
AA6B9D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N77012.
Where is Mode-S AA6B9D registered?
Mode-S code AA6B9D 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 AA6B9D broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA6B9D, octal 52465635, decimal 11,168,669.
What flights does AA6B9D operate?
Mode-S AA6B9D has broadcast 20 distinct callsigns, including UAL59, UAL2397, UAL2238, UAL804, UAL58.