Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9D62E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73299 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
A9D62E
Octal
52353056
Decimal
11,130,414
Country
US
Tail
N73299
Type
B738
No current signal · last broadcast 7h ago
Flights observed
216
Distinct callsigns
20
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A9D62E.

Country allocation

The ICAO 24-bit address A9D62E 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
UAL837 - 27 2026-07-12
UAL33 - 26 2026-07-12
UAL838 - 21 2026-07-13
UAL151 - 15 2026-07-09
UAL32 - 13 2026-07-11
UAL193 - 13 2026-06-30
UAL864 - 9 2026-07-11
UAL197 - 9 2026-07-07
UAL848 - 8 2026-07-02
UAL184 - 8 2026-07-08
UAL150 - 8 2026-07-09
UAL873 United Airlines 7 2026-06-03
UAL849 - 7 2026-07-02
UAL827 United Airlines 7 2026-06-04
UAL865 - 6 2026-07-13
UAL196 - 6 2026-06-26
UAL183 - 5 2026-07-08
UAL157 United Airlines 4 2026-06-15
UAL166 - 3 2026-07-08
UAL137 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL3891 GUM → HNL Jul 14, 00:11 UTCJul 14, 07:43 UTC7h 32m
2026-07-13 UAL865 - Jul 13, 07:55 UTCJul 13, 08:25 UTC30m
2026-07-13 UAL838 KHH → NRT Jul 13, 02:08 UTCJul 13, 05:37 UTC3h 29m
2026-07-13 UAL838 - Jul 13, 02:01 UTCJul 13, 03:10 UTC1h 10m
2026-07-12 UAL837 - Jul 12, 09:20 UTCJul 12, 12:25 UTC3h 5m
2026-07-12 UAL33 CEB → NRT Jul 12, 01:36 UTCJul 12, 05:46 UTC4h 10m
2026-07-11 UAL32 - Jul 11, 09:35 UTCJul 11, 10:10 UTC35m
2026-07-11 UAL864 GUM → NRT Jul 11, 03:12 UTCJul 11, 06:36 UTC3h 24m
2026-07-09 UAL150 - Jul 9, 02:15 UTCJul 9, 02:30 UTC15m
2026-07-09 UAL151 - Jul 9, 00:30 UTCJul 9, 00:45 UTC15m
2026-07-08 UAL184 - Jul 8, 15:10 UTCJul 8, 16:55 UTC1h 45m
2026-07-08 UAL184 MNL → GUM Jul 8, 15:08 UTCJul 8, 18:26 UTC3h 18m
2026-07-08 UAL183 - Jul 8, 11:10 UTCJul 8, 13:45 UTC2h 35m
2026-07-08 UAL166 - Jul 8, 03:15 UTCJul 8, 04:25 UTC1h 10m
2026-07-08 UAL166 TPE → GUM Jul 8, 03:17 UTCJul 8, 07:14 UTC3h 57m
2026-07-08 UAL165 - Jul 8, 00:15 UTCJul 8, 01:25 UTC1h 10m
2026-07-07 UAL165 GUM → TPE Jul 7, 21:58 UTCJul 8, 01:20 UTC3h 22m
2026-07-07 UAL197 - Jul 7, 08:25 UTCJul 7, 08:55 UTC30m
2026-07-06 UAL838 KHH → NRT Jul 6, 02:00 UTCJul 6, 05:20 UTC3h 20m
2026-07-05 UAL837 SFO → NRT Jul 5, 09:15 UTCJul 5, 09:30 UTC15m
2026-07-05 UAL837 SFO → NRT Jul 5, 09:22 UTCJul 5, 12:41 UTC3h 19m
2026-07-04 UAL33 - Jul 4, 09:35 UTCJul 5, 05:30 UTC19h 55m
2026-07-04 UAL33 - Jul 4, 09:20 UTCJul 5, 05:30 UTC20h 10m
2026-07-04 UAL864 - Jul 4, 05:50 UTCJul 4, 06:35 UTC45m
2026-07-03 UAL192 - Jul 3, 18:20 UTCJul 3, 18:30 UTC10m
2026-07-03 UAL192 MNL → ROR Jul 3, 14:45 UTCJul 3, 17:05 UTC2h 20m
2026-07-03 UAL183 - Jul 3, 02:15 UTCJul 3, 12:50 UTC10h 35m
2026-07-03 UAL151 - Jul 3, 00:25 UTCJul 3, 00:40 UTC15m
2026-07-02 UAL848 - Jul 2, 14:50 UTCJul 2, 15:25 UTC35m
2026-07-02 UAL849 - Jul 2, 12:05 UTCJul 2, 12:50 UTC45m
2026-07-02 UAL150 KIX → GUM Jul 2, 02:25 UTCJul 2, 05:34 UTC3h 9m
2026-07-02 UAL150 KIX → GUM Jul 2, 02:25 UTCJul 2, 02:40 UTC15m
2026-07-02 UAL151 - Jul 2, 00:30 UTCJul 2, 00:50 UTC20m
2026-07-01 UAL166 - Jul 1, 03:30 UTCJul 1, 03:55 UTC25m
2026-06-30 UAL184 MNL → TPE Jun 30, 16:10 UTCJul 1, 01:30 UTC9h 20m
2026-06-30 UAL193 - Jun 30, 12:10 UTCJun 30, 14:40 UTC2h 30m
2026-06-30 UAL193 ROR → MNL Jun 30, 12:08 UTCJun 30, 14:35 UTC2h 27m
2026-06-30 UAL193 - Jun 30, 10:40 UTCJun 30, 11:05 UTC25m
2026-06-29 UAL136 - Jun 29, 02:39 UTCJun 29, 02:59 UTC20m
2026-06-29 UAL137 - Jun 29, 00:24 UTCJun 29, 00:34 UTC10m
2026-06-28 UAL137 GUM → NGO Jun 28, 21:43 UTCJun 29, 00:46 UTC3h 3m
2026-06-28 UAL197 - Jun 28, 08:14 UTCJun 28, 08:50 UTC35m
2026-06-28 UAL838 KHH → NRT Jun 28, 02:10 UTCJun 28, 05:15 UTC3h 5m
2026-06-27 UAL837 SFO → NRT Jun 27, 09:44 UTCJun 27, 13:15 UTC3h 30m
2026-06-27 UAL33 - Jun 27, 05:04 UTCJun 27, 05:49 UTC45m
2026-06-26 UAL33 - Jun 26, 10:05 UTCJun 27, 05:49 UTC19h 45m
2026-06-26 UAL196 GUM → NRT Jun 26, 02:29 UTCJun 26, 05:47 UTC3h 18m
2026-06-25 UAL196 - Jun 25, 08:14 UTCJun 26, 06:04 UTC21h 50m
2026-06-25 UAL838 KHH → NRT Jun 25, 02:05 UTCJun 25, 05:29 UTC3h 25m
2026-06-24 UAL837 SFO → NRT Jun 24, 09:09 UTCJun 24, 12:34 UTC3h 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 N73299 page for operator, model, and routing details .

Mode-S A9D62E frequently asked

What is Mode-S code A9D62E?
A9D62E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73299.
Where is Mode-S A9D62E registered?
Mode-S code A9D62E 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 A9D62E broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D62E, octal 52353056, decimal 11,130,414.
What flights does A9D62E operate?
Mode-S A9D62E has broadcast 20 distinct callsigns, including UAL837, UAL33, UAL838, UAL151, UAL32.