Apparatus

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sensors Mode-S transponder

A2B416

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27304 · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
A2B416
Octal
50532026
Decimal
10,662,934
Country
US
Tail
N27304
Type
B38M
No current signal · last broadcast Jul 26, 15:25 UTC
Flights observed
198
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 15:25 UTC

Last known position

Most recent position reported by Mode-S A2B416.

Country allocation

The ICAO 24-bit address A2B416 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
UAL183 - 17 2026-07-20
UAL184 - 16 2026-07-20
UAL849 United Airlines 13 2026-07-26
UAL848 United Airlines 13 2026-07-26
UAL197 - 13 2026-07-03
UAL6 United Airlines 11 2026-07-22
UAL196 - 11 2026-07-21
UAL7 United Airlines 10 2026-07-21
UAL154 - 9 2026-07-16
UAL155 United Airlines 8 2026-05-25
UAL133 - 8 2026-07-04
UAL132 United Airlines 7 2026-07-25
UAL142 United Airlines 6 2026-07-23
UAL33 - 5 2026-06-16
UAL151 - 5 2026-07-13
UAL150 - 5 2026-07-13
UAL193 - 4 2026-07-10
UAL157 - 4 2026-06-28
UAL143 - 4 2026-07-22
UAL137 United Airlines 4 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL848 HND → GUM Jul 26, 14:50 UTCJul 26, 15:25 UTC35m
2026-07-26 UAL849 GUM → HND Jul 26, 12:05 UTCJul 26, 12:55 UTC50m
2026-07-26 UAL849 GUM → HND Jul 26, 09:44 UTCJul 26, 12:52 UTC3h 8m
2026-07-25 UAL132 MAJ → PNI Jul 25, 18:45 UTCJul 25, 18:55 UTC10m
2026-07-25 UAL3048 FCO → IAD Jul 25, 13:30 UTCJul 25, 13:40 UTC10m
2026-07-24 UAL865 NRT → GUM Jul 24, 07:50 UTCJul 24, 08:25 UTC35m
2026-07-24 UAL838 NRT → SFO Jul 24, 02:05 UTCJul 24, 05:25 UTC3h 20m
2026-07-23 UAL837 SFO → NRT Jul 23, 09:15 UTCJul 23, 12:25 UTC3h 10m
2026-07-23 UAL142 NRT → DEN Jul 23, 01:55 UTCJul 23, 06:20 UTC4h 25m
2026-07-22 UAL143 - Jul 22, 12:05 UTCJul 22, 12:35 UTC30m
2026-07-22 UAL6 NRT → IAH Jul 22, 02:12 UTCJul 22, 06:41 UTC4h 29m
2026-07-21 UAL7 IAH → NRT Jul 21, 07:55 UTCJul 21, 11:05 UTC3h 10m
2026-07-21 UAL7 IAH → NRT Jul 21, 07:47 UTCJul 21, 12:17 UTC4h 30m
2026-07-21 UAL196 - Jul 21, 04:50 UTCJul 21, 05:40 UTC50m
2026-07-20 UAL184 MNL → GUM Jul 20, 14:50 UTCJul 20, 17:55 UTC3h 5m
2026-07-20 UAL184 - Jul 20, 14:45 UTCJul 20, 15:15 UTC30m
2026-07-20 UAL183 - Jul 20, 12:00 UTCJul 20, 12:45 UTC45m
2026-07-19 UAL137 GUM → NGO Jul 19, 21:43 UTCJul 20, 00:44 UTC3h 1m
2026-07-19 UAL184 - Jul 19, 14:55 UTCJul 19, 15:30 UTC35m
2026-07-19 UAL183 - Jul 19, 12:00 UTCJul 19, 12:45 UTC45m
2026-07-19 UAL183 GUM → MNL Jul 19, 09:29 UTCJul 19, 12:46 UTC3h 17m
2026-07-18 UAL874 NRT → GUM Jul 18, 12:30 UTCJul 18, 13:05 UTC35m
2026-07-18 UAL873 - Jul 18, 09:35 UTCJul 18, 10:20 UTC45m
2026-07-16 UAL154 - Jul 16, 18:00 UTCJul 16, 18:15 UTC15m
2026-07-16 UAL3043 - Jul 16, 14:25 UTCJul 16, 14:40 UTC15m
2026-07-13 UAL150 KIX → GUM Jul 13, 02:25 UTCJul 13, 05:24 UTC2h 59m
2026-07-13 UAL150 - Jul 13, 02:15 UTCJul 13, 02:30 UTC15m
2026-07-13 UAL151 - Jul 13, 00:20 UTCJul 13, 00:30 UTC10m
2026-07-12 UAL151 GUM → KIX Jul 12, 21:28 UTCJul 13, 00:32 UTC3h 4m
2026-07-12 UAL184 - Jul 12, 15:15 UTCJul 12, 15:30 UTC15m
2026-07-12 UAL184 MNL → GUM Jul 12, 14:50 UTCJul 12, 18:28 UTC3h 38m
2026-07-12 UAL183 GUM → MNL Jul 12, 09:29 UTCJul 12, 12:54 UTC3h 25m
2026-07-12 UAL183 - Jul 12, 02:15 UTCJul 12, 13:01 UTC10h 45m
2026-07-10 UAL873 - Jul 10, 16:40 UTCJul 11, 10:35 UTC17h 55m
2026-07-10 UAL193 - Jul 10, 12:10 UTCJul 10, 14:25 UTC2h 15m
2026-07-10 UAL193 - Jul 10, 10:35 UTCJul 10, 11:00 UTC25m
2026-07-07 UAL3049 - Jul 7, 21:55 UTCJul 7, 22:05 UTC10m
2026-07-04 UAL133 - Jul 4, 11:40 UTCJul 4, 12:00 UTC20m
2026-07-04 UAL133 MAJ → HNL Jul 4, 07:37 UTCJul 4, 11:57 UTC4h 20m
2026-07-03 UAL197 - Jul 3, 08:20 UTCJul 3, 08:55 UTC35m
2026-07-02 UAL6 - Jul 2, 11:35 UTCJul 3, 06:35 UTC19h 0m
2026-07-02 UAL6 - Jul 2, 09:35 UTCJul 3, 06:35 UTC21h 0m
2026-07-02 UAL7 - Jul 2, 08:10 UTCJul 3, 06:35 UTC22h 25m
2026-07-02 UAL142 NRT → DEN Jul 2, 01:55 UTCJul 2, 06:30 UTC4h 35m
2026-07-01 UAL143 DEN → NRT Jul 1, 08:00 UTCJul 1, 12:05 UTC4h 5m
2026-07-01 UAL6 UBN → NRT Jul 1, 02:22 UTCJul 1, 06:18 UTC3h 56m
2026-06-30 UAL7 - Jun 30, 08:10 UTCJul 1, 06:25 UTC22h 15m
2026-06-29 UAL848 HND → NRT Jun 29, 15:00 UTCJun 30, 06:00 UTC15h 1m
2026-06-29 UAL849 - Jun 29, 12:09 UTCJun 29, 12:55 UTC45m
2026-06-28 UAL158 - Jun 28, 17:10 UTCJun 28, 17:30 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 N27304 page for operator, model, and routing details .

Mode-S A2B416 frequently asked

What is Mode-S code A2B416?
A2B416 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27304.
Where is Mode-S A2B416 registered?
Mode-S code A2B416 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 A2B416 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2B416, octal 50532026, decimal 10,662,934.
What flights does A2B416 operate?
Mode-S A2B416 has broadcast 20 distinct callsigns, including UAL183, UAL184, UAL849, UAL848, UAL197.