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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 Jul 26, 10:50 UTC
Flights observed
209
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 10:50 UTC

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 United Airlines 36 2026-07-26
UAL827 United Airlines 32 2026-07-26
UAL151 United Airlines 18 2026-07-25
UAL157 - 13 2026-07-02
UAL150 United Airlines 13 2026-07-25
UAL183 - 12 2026-06-23
UAL158 - 12 2026-06-17
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
UAL197 United Airlines 4 2026-07-25
UAL838 United Airlines 3 2026-07-22
UAL837 - 3 2026-07-21
UAL33 United Airlines 3 2026-07-23
UAL193 - 3 2026-07-14
UAL3914 - 2 2026-07-07
UAL32 - 2 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL873 GUM → NRT Jul 26, 07:13 UTCJul 26, 10:39 UTC3h 26m
2026-07-26 UAL827 NRT → GUM Jul 26, 02:20 UTCJul 26, 03:00 UTC40m
2026-07-26 UAL827 NRT → GUM Jul 26, 02:17 UTCJul 26, 05:41 UTC3h 24m
2026-07-25 UAL828 GUM → NRT Jul 25, 23:40 UTCJul 26, 00:25 UTC45m
2026-07-25 UAL197 NRT → GUM Jul 25, 12:52 UTCJul 25, 15:50 UTC2h 58m
2026-07-25 UAL197 NRT → GUM Jul 25, 12:35 UTCJul 25, 13:15 UTC40m
2026-07-25 UAL3905 TPE → SFO Jul 25, 10:35 UTCJul 25, 11:15 UTC40m
2026-07-25 UAL150 KIX → GUM Jul 25, 02:30 UTCJul 25, 02:45 UTC15m
2026-07-25 UAL151 GUM → KIX Jul 25, 00:25 UTCJul 25, 00:35 UTC10m
2026-07-24 UAL151 GUM → KIX Jul 24, 21:28 UTCJul 25, 00:27 UTC2h 59m
2026-07-23 UAL197 NRT → GUM Jul 23, 09:15 UTCJul 23, 10:00 UTC45m
2026-07-23 UAL33 NRT → LAX Jul 23, 05:00 UTCJul 23, 05:50 UTC50m
2026-07-22 UAL33 NRT → LAX Jul 22, 10:20 UTCJul 23, 05:50 UTC19h 30m
2026-07-22 UAL838 NRT → SFO Jul 22, 02:35 UTCJul 22, 05:25 UTC2h 50m
2026-07-21 UAL837 NRT → KHH Jul 21, 09:22 UTCJul 21, 12:36 UTC3h 14m
2026-07-21 UAL864 GUM → NRT Jul 21, 03:12 UTCJul 21, 06:32 UTC3h 20m
2026-07-20 UAL874 NRT → GUM Jul 20, 12:15 UTCJul 20, 13:00 UTC45m
2026-07-20 UAL873 - Jul 20, 09:25 UTCJul 20, 10:15 UTC50m
2026-07-19 UAL150 - Jul 19, 02:20 UTCJul 19, 02:35 UTC15m
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

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 Jul 26, 10:50 UTC.
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, UAL150.