Apparatus

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sensors Mode-S transponder

A9D605

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73283 · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
A9D605
Octal
52353005
Decimal
11,130,373
Country
US
Tail
N73283
Type
B738
No current signal · last broadcast 1d ago
Flights observed
190
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A9D605.

Country allocation

The ICAO 24-bit address A9D605 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
UAL873 - 34 2026-07-13
UAL827 - 30 2026-07-14
UAL151 - 16 2026-07-15
UAL157 - 13 2026-07-02
UAL183 - 12 2026-06-23
UAL158 - 12 2026-06-17
UAL150 - 11 2026-07-16
UAL136 - 11 2026-07-02
UAL166 United Airlines 10 2026-06-17
UAL184 - 9 2026-07-14
UAL165 United Airlines 7 2026-06-17
UAL192 - 6 2026-06-23
UAL137 - 5 2026-07-02
UAL193 - 3 2026-07-14
UAL838 - 2 2026-07-01
UAL837 United Airlines 2 2026-06-30
UAL3914 - 2 2026-07-07
UAL32 - 2 2026-06-28
UAL33 - 1 2026-06-29
UAL197 - 1 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 UAL150 - Jul 16, 02:25 UTCJul 16, 02:40 UTC15m
2026-07-15 UAL151 GUM → KIX Jul 15, 21:28 UTCJul 16, 00:48 UTC3h 20m
2026-07-15 UAL150 - Jul 15, 02:15 UTCJul 15, 02:30 UTC15m
2026-07-15 UAL151 - Jul 15, 00:25 UTCJul 15, 00:35 UTC10m
2026-07-14 UAL184 - Jul 14, 16:10 UTCJul 14, 16:45 UTC35m
2026-07-14 UAL193 - Jul 14, 12:20 UTCJul 14, 14:50 UTC2h 30m
2026-07-14 UAL193 ROR → MNL Jul 14, 12:18 UTCJul 14, 14:40 UTC2h 22m
2026-07-14 UAL827 - Jul 14, 02:00 UTCJul 14, 11:15 UTC9h 15m
2026-07-13 UAL873 - Jul 13, 09:45 UTCJul 13, 10:30 UTC45m
2026-07-13 UAL827 - Jul 13, 02:10 UTCJul 13, 03:10 UTC1h 0m
2026-07-13 UAL827 NRT → GUM Jul 13, 02:17 UTCJul 13, 05:18 UTC3h 1m
2026-07-12 UAL873 - Jul 12, 02:10 UTCJul 12, 10:25 UTC8h 15m
2026-07-11 UAL151 GUM → KIX Jul 11, 21:28 UTCJul 12, 00:26 UTC2h 58m
2026-07-11 UAL827 - Jul 11, 02:30 UTCJul 11, 03:05 UTC35m
2026-07-10 UAL873 - Jul 10, 09:50 UTCJul 10, 10:45 UTC55m
2026-07-10 UAL827 - Jul 10, 02:15 UTCJul 10, 02:50 UTC35m
2026-07-10 UAL827 NRT → GUM Jul 10, 02:17 UTCJul 10, 05:34 UTC3h 17m
2026-07-09 UAL873 GUM → NRT Jul 9, 07:13 UTCJul 9, 10:11 UTC2h 58m
2026-07-09 UAL873 - Jul 9, 02:10 UTCJul 9, 10:20 UTC8h 10m
2026-07-08 UAL873 - Jul 8, 09:50 UTCJul 8, 10:35 UTC45m
2026-07-08 UAL150 KIX → GUM Jul 8, 02:25 UTCJul 8, 05:26 UTC3h 1m
2026-07-08 UAL150 - Jul 8, 02:15 UTCJul 8, 02:30 UTC15m
2026-07-08 UAL151 - Jul 8, 00:30 UTCJul 8, 00:40 UTC10m
2026-07-07 UAL151 GUM → KIX Jul 7, 21:28 UTCJul 8, 00:33 UTC3h 5m
2026-07-07 UAL3914 - Jul 7, 09:45 UTCJul 7, 10:15 UTC30m
2026-07-07 UAL3914 NRT → GUM Jul 7, 09:36 UTCJul 7, 12:54 UTC3h 18m
2026-07-04 UAL873 GUM → NRT Jul 4, 07:13 UTCJul 4, 10:32 UTC3h 19m
2026-07-04 UAL827 - Jul 4, 02:30 UTCJul 4, 03:00 UTC30m
2026-07-04 UAL827 NRT → GUM Jul 4, 02:17 UTCJul 4, 05:38 UTC3h 21m
2026-07-02 UAL873 - Jul 2, 17:00 UTCJul 3, 10:35 UTC17h 35m
2026-07-02 UAL157 - Jul 2, 15:10 UTCJul 2, 15:25 UTC15m
2026-07-02 UAL136 - Jul 2, 02:30 UTCJul 2, 03:00 UTC30m
2026-07-02 UAL137 - Jul 2, 00:25 UTCJul 2, 00:35 UTC10m
2026-07-01 UAL137 GUM → NGO Jul 1, 21:43 UTCJul 2, 00:40 UTC2h 57m
2026-07-01 UAL197 - Jul 1, 08:15 UTCJul 1, 08:50 UTC35m
2026-07-01 UAL838 KHH → NRT Jul 1, 02:10 UTCJul 1, 05:35 UTC3h 25m
2026-06-30 UAL837 SFO → NRT Jun 30, 09:10 UTCJun 30, 12:30 UTC3h 20m
2026-06-30 UAL838 KHH → NRT Jun 30, 01:55 UTCJun 30, 05:30 UTC3h 35m
2026-06-29 UAL837 SFO → NRT Jun 29, 09:14 UTCJun 29, 12:45 UTC3h 30m
2026-06-29 UAL33 - Jun 29, 01:44 UTCJun 29, 05:45 UTC4h 0m
2026-06-28 UAL32 - Jun 28, 09:20 UTCJun 28, 10:00 UTC40m
2026-06-28 UAL32 NRT → CEB Jun 28, 09:22 UTCJun 28, 13:30 UTC4h 8m
2026-06-28 UAL196 - Jun 28, 05:04 UTCJun 28, 05:55 UTC50m
2026-06-27 UAL827 - Jun 27, 02:20 UTCJun 27, 02:55 UTC35m
2026-06-26 UAL873 - Jun 26, 09:45 UTCJun 26, 10:35 UTC50m
2026-06-23 UAL192 - Jun 23, 18:20 UTCJun 23, 18:29 UTC10m
2026-06-23 UAL192 MNL → ROR Jun 23, 14:49 UTCJun 23, 17:04 UTC2h 15m
2026-06-23 UAL183 - Jun 23, 10:44 UTCJun 23, 13:00 UTC2h 15m
2026-06-23 UAL183 GUM → MNL Jun 23, 09:29 UTCJun 23, 12:56 UTC3h 27m
2026-06-22 UAL136 - Jun 22, 02:45 UTCJun 22, 03:05 UTC20m

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 N73283 page for operator, model, and routing details .

Mode-S A9D605 frequently asked

What is Mode-S code A9D605?
A9D605 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73283.
Where is Mode-S A9D605 registered?
Mode-S code A9D605 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 A9D605 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 A9D605, octal 52353005, decimal 11,130,373.
What flights does A9D605 operate?
Mode-S A9D605 has broadcast 20 distinct callsigns, including UAL873, UAL827, UAL151, UAL157, UAL183.