Apparatus

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sensors Mode-S transponder

A0B845

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14545 · AIRBUS A-321neo

Hex
A0B845
Octal
50134105
Decimal
10,532,933
Country
US
Tail
N14545
Type
A21N
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
447
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A0B845.

Country allocation

The ICAO 24-bit address A0B845 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
UAL2088 United Airlines 10 2026-07-21
UAL1610 - 6 2026-06-19
UAL540 - 5 2026-07-13
UAL534 - 5 2026-06-29
UAL489 United Airlines 5 2026-06-25
UAL374 - 5 2026-06-24
UAL2618 - 5 2026-07-16
UAL2481 - 5 2026-07-09
UAL2089 - 5 2026-07-17
UAL1755 - 5 2026-06-20
UAL746 United Airlines 4 2026-07-26
UAL695 - 4 2026-07-17
UAL2865 United Airlines 4 2026-06-11
UAL2643 United Airlines 4 2026-07-26
UAL2475 - 4 2026-07-06
UAL2361 - 4 2026-06-23
UAL2339 United Airlines 4 2026-06-02
UAL2197 United Airlines 4 2026-05-26
UAL2132 - 4 2026-07-19
UAL1996 United Airlines 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL746 SRQ → EWR Jul 26, 20:40 UTCJul 26, 21:15 UTC35m
2026-07-26 UAL789 EWR → CLT Jul 26, 16:05 UTCJul 26, 19:00 UTC2h 55m
2026-07-26 UAL2643 DEN → BOS Jul 26, 11:35 UTCJul 26, 13:30 UTC1h 55m
2026-07-26 UAL475 EWR → MCO Jul 26, 02:05 UTCJul 26, 03:55 UTC1h 50m
2026-07-25 UAL2845 MCO → DEN Jul 25, 19:50 UTCJul 25, 23:10 UTC3h 20m
2026-07-25 UAL2845 MCO → DEN Jul 25, 19:55 UTCJul 25, 23:05 UTC3h 10m
2026-07-25 UAL2292 EWR → DEN Jul 25, 14:25 UTCJul 25, 17:40 UTC3h 15m
2026-07-24 UAL407 DTW → ORD Jul 24, 23:17 UTCJul 25, 02:30 UTC3h 13m
2026-07-24 UAL407 DTW → ORD Jul 24, 23:05 UTCJul 25, 02:35 UTC3h 30m
2026-07-24 UAL1233 ORD → SFO Jul 24, 17:55 UTCJul 24, 21:00 UTC3h 5m
2026-07-24 UAL2154 ORD → TPA Jul 24, 12:05 UTCJul 24, 15:50 UTC3h 45m
2026-07-24 UAL2033 RNO → SFO Jul 24, 00:07 UTCJul 24, 03:13 UTC3h 6m
2026-07-24 UAL2033 RNO → SFO Jul 24, 00:05 UTCJul 24, 03:15 UTC3h 10m
2026-07-23 UAL360 DFW → EWR Jul 23, 20:20 UTCJul 23, 21:15 UTC55m
2026-07-23 UAL360 DFW → EWR Jul 23, 20:04 UTCJul 23, 22:21 UTC2h 17m
2026-07-23 UAL405 RSW → ORD Jul 23, 16:20 UTCJul 23, 18:10 UTC1h 50m
2026-07-23 UAL2601 RSW → EWR Jul 23, 12:25 UTCJul 23, 14:35 UTC2h 10m
2026-07-22 UAL1801 BUR → SFO Jul 22, 22:25 UTCJul 23, 02:15 UTC3h 50m
2026-07-22 UAL2827 - Jul 22, 17:10 UTCJul 22, 19:15 UTC2h 5m
2026-07-22 UAL1231 RDU → EWR Jul 22, 12:55 UTCJul 22, 14:55 UTC2h 0m
2026-07-21 UAL2091 SFO → ORD Jul 21, 13:30 UTCJul 21, 17:10 UTC3h 40m
2026-07-21 UAL8120 YHZ → BOS Jul 21, 03:40 UTCJul 21, 07:50 UTC4h 10m
2026-07-21 UAL2088 SJU → ORD Jul 21, 00:40 UTCJul 21, 00:45 UTC5m
2026-07-20 UAL2088 SJU → ORD Jul 20, 22:45 UTCJul 21, 00:45 UTC1h 59m
2026-07-20 UAL2088 SJU → ORD Jul 20, 20:25 UTCJul 20, 20:40 UTC15m
2026-07-20 UAL2088 SJU → ORD Jul 20, 20:25 UTCJul 21, 00:25 UTC4h 0m
2026-07-20 UAL1996 ORD → SJU Jul 20, 18:35 UTCJul 20, 18:55 UTC20m
2026-07-20 UAL1996 ORD → SJU Jul 20, 14:50 UTCJul 20, 16:50 UTC2h 0m
2026-07-20 UAL729 - Jul 20, 08:10 UTCJul 20, 11:50 UTC3h 40m
2026-07-20 UAL729 LAX → ORD Jul 20, 08:02 UTCJul 20, 11:47 UTC3h 45m
2026-07-20 UAL2499 SEA → SFO Jul 20, 02:03 UTCJul 20, 05:22 UTC3h 19m
2026-07-20 UAL2499 SEA → SFO Jul 20, 01:55 UTCJul 20, 05:25 UTC3h 30m
2026-07-19 UAL2832 RSW → ORD Jul 19, 21:10 UTCJul 19, 23:50 UTC2h 40m
2026-07-19 UAL2601 RSW → EWR Jul 19, 16:00 UTCJul 19, 19:40 UTC3h 40m
2026-07-19 UAL1889 - Jul 19, 12:30 UTCJul 19, 14:25 UTC1h 55m
2026-07-19 UAL2132 MSP → EWR Jul 19, 02:16 UTCJul 19, 04:17 UTC2h 1m
2026-07-19 UAL2132 - Jul 19, 02:20 UTCJul 19, 03:15 UTC55m
2026-07-18 UAL746 SRQ → EWR Jul 18, 21:40 UTCJul 19, 00:50 UTC3h 10m
2026-07-18 UAL746 SRQ → EWR Jul 18, 21:14 UTCJul 19, 00:48 UTC3h 34m
2026-07-18 UAL789 DEN → DCA Jul 18, 16:10 UTCJul 18, 19:45 UTC3h 35m
2026-07-18 UAL2643 DEN → BOS Jul 18, 11:55 UTCJul 18, 13:45 UTC1h 50m
2026-07-18 UAL2813 - Jul 18, 03:30 UTCJul 18, 05:25 UTC1h 55m
2026-07-17 UAL2497 ORD → BOS Jul 17, 23:30 UTCJul 18, 01:10 UTC1h 40m
2026-07-17 UAL2794 ORD → IAD Jul 17, 19:05 UTCJul 17, 20:25 UTC1h 20m
2026-07-17 UAL2089 - Jul 17, 14:04 UTCJul 17, 16:04 UTC2h 0m
2026-07-17 UAL2089 - Jul 17, 11:45 UTCJul 17, 12:00 UTC15m
2026-07-17 UAL695 - Jul 17, 00:20 UTCJul 17, 00:40 UTC20m
2026-07-16 UAL695 - Jul 16, 20:29 UTCJul 16, 22:15 UTC1h 45m
2026-07-16 UAL2618 SEA → ORD Jul 16, 14:18 UTCJul 16, 17:22 UTC3h 4m
2026-07-16 UAL2618 - Jul 16, 14:10 UTCJul 16, 17:14 UTC3h 5m

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 N14545 page for operator, model, and routing details .

Mode-S A0B845 frequently asked

What is Mode-S code A0B845?
A0B845 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14545.
Where is Mode-S A0B845 registered?
Mode-S code A0B845 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 A0B845 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B845, octal 50134105, decimal 10,532,933.
What flights does A0B845 operate?
Mode-S A0B845 has broadcast 20 distinct callsigns, including UAL2088, UAL1610, UAL540, UAL534, UAL489.