Apparatus

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sensors Mode-S transponder

A0B849

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14549 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
A0B849
Octal
50134111
Decimal
10,532,937
Country
US
Tail
N14549
Type
A21N
Broadcasting now · callsign UAL1924 · 29,900 ft
Flights observed
353
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

A0B849 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0B849 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
UAL800 - 8 2026-07-08
UAL2292 - 7 2026-07-12
UAL1568 United Airlines 7 2026-06-26
UAL1132 United Airlines 6 2026-05-17
UAL540 - 5 2026-06-20
UAL2845 - 5 2026-07-13
UAL2610 - 5 2026-07-12
UAL1232 - 5 2026-07-08
UAL2794 - 4 2026-07-03
UAL2132 United Airlines 4 2026-05-18
UAL2099 - 4 2026-07-07
UAL2088 United Airlines 4 2026-06-05
UAL1775 - 4 2026-06-24
UAL1755 - 4 2026-06-22
UAL8188 United Airlines 3 2026-04-14
UAL8156 - 3 2026-04-13
UAL714 - 3 2026-06-26
UAL534 - 3 2026-07-01
UAL374 - 3 2026-07-11
UAL2865 United Airlines 3 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL767 - Jul 14, 01:25 UTCJul 14, 03:10 UTC1h 45m
2026-07-13 UAL8113 DEN → ORD Jul 13, 21:20 UTCJul 13, 23:15 UTC1h 55m
2026-07-13 UAL2843 - Jul 13, 17:30 UTCJul 13, 19:30 UTC2h 0m
2026-07-13 UAL2843 SNA → DEN Jul 13, 17:33 UTCJul 13, 19:25 UTC1h 52m
2026-07-13 UAL2666 - Jul 13, 13:50 UTCJul 13, 15:45 UTC1h 55m
2026-07-13 UAL2845 MCO → DEN Jul 13, 02:45 UTCJul 13, 06:05 UTC3h 20m
2026-07-12 UAL2292 - Jul 12, 21:50 UTCJul 12, 22:15 UTC25m
2026-07-12 UAL2292 FLL → MCO Jul 12, 20:48 UTCJul 12, 22:46 UTC1h 58m
2026-07-12 UAL2292 DEN → FLL Jul 12, 14:35 UTCJul 12, 19:15 UTC4h 40m
2026-07-12 UAL2610 - Jul 12, 02:01 UTCJul 12, 03:50 UTC1h 50m
2026-07-11 UAL374 ORD → LAX Jul 11, 19:40 UTCJul 11, 23:15 UTC3h 35m
2026-07-11 UAL2329 DEN → ORD Jul 11, 15:55 UTCJul 11, 17:45 UTC1h 50m
2026-07-11 UAL459 PDX → DEN Jul 11, 12:05 UTCJul 11, 14:05 UTC2h 0m
2026-07-11 UAL498 DEN → PDX Jul 11, 02:20 UTCJul 11, 04:35 UTC2h 15m
2026-07-10 UAL2845 - Jul 10, 22:35 UTCJul 10, 23:30 UTC55m
2026-07-10 UAL2845 - Jul 10, 19:55 UTCJul 10, 22:30 UTC2h 35m
2026-07-10 UAL2845 MCO → DEN Jul 10, 19:55 UTCJul 10, 23:28 UTC3h 33m
2026-07-10 UAL2292 EWR → DEN Jul 10, 14:28 UTCJul 10, 17:28 UTC3h 0m
2026-07-10 UAL2292 EWR → DEN Jul 10, 14:25 UTCJul 10, 17:30 UTC3h 5m
2026-07-10 UAL2667 IAD → DEN Jul 10, 00:35 UTCJul 10, 04:10 UTC3h 35m
2026-07-09 UAL2853 DEN → IAD Jul 9, 18:40 UTCJul 9, 22:25 UTC3h 45m
2026-07-09 UAL2154 LGA → DEN Jul 9, 12:55 UTCJul 9, 16:25 UTC3h 30m
2026-07-09 UAL3934 EWR → LGA Jul 9, 11:10 UTCJul 9, 11:25 UTC15m
2026-07-09 UAL2033 DEN → EWR Jul 9, 05:35 UTCJul 9, 09:10 UTC3h 35m
2026-07-08 UAL800 - Jul 8, 22:40 UTCJul 9, 02:40 UTC4h 0m
2026-07-08 UAL800 BOS → BOS Jul 8, 21:50 UTCJul 8, 21:55 UTC5m
2026-07-08 UAL1232 DEN → BOS Jul 8, 16:55 UTCJul 8, 20:25 UTC3h 30m
2026-07-08 UAL2154 LGA → DEN Jul 8, 12:10 UTCJul 8, 15:35 UTC3h 25m
2026-07-08 UAL2033 - Jul 8, 00:50 UTCJul 8, 02:15 UTC1h 25m
2026-07-08 UAL2033 DEN → LGA Jul 8, 00:53 UTCJul 8, 04:08 UTC3h 15m
2026-07-07 UAL1351 SEA → DEN Jul 7, 20:10 UTCJul 7, 23:20 UTC3h 10m
2026-07-07 UAL2099 ORD → SEA Jul 7, 14:25 UTCJul 7, 18:15 UTC3h 50m
2026-07-07 UAL1850 - Jul 7, 08:55 UTCJul 7, 12:30 UTC3h 35m
2026-07-07 UAL2123 - Jul 7, 05:15 UTCJul 7, 07:20 UTC2h 5m
2026-07-07 UAL8267 IAD → DEN Jul 7, 00:25 UTCJul 7, 03:30 UTC3h 5m
2026-07-06 UAL2853 DEN → IAD Jul 6, 18:40 UTCJul 6, 21:45 UTC3h 5m
2026-07-06 UAL1450 - Jul 6, 15:00 UTCJul 6, 16:55 UTC1h 55m
2026-07-05 UAL1585 - Jul 5, 23:45 UTCJul 6, 02:05 UTC2h 20m
2026-07-05 UAL318 RSW → DEN Jul 5, 12:25 UTCJul 5, 15:50 UTC3h 25m
2026-07-04 UAL2601 RSW → EWR Jul 4, 15:45 UTCJul 4, 19:20 UTC3h 35m
2026-07-04 UAL2031 IAD → DEN Jul 4, 10:35 UTCJul 4, 14:00 UTC3h 25m
2026-07-03 UAL2794 ORD → IAD Jul 3, 20:50 UTCJul 3, 22:30 UTC1h 40m
2026-07-03 UAL2794 ORD → IAD Jul 3, 20:09 UTCJul 3, 22:26 UTC2h 17m
2026-07-03 UAL8182 - Jul 3, 15:45 UTCJul 3, 16:20 UTC35m
2026-07-03 UAL8182 IND → ORD Jul 3, 15:26 UTCJul 3, 16:10 UTC44m
2026-07-02 UAL1482 - Jul 2, 23:50 UTCJul 3, 03:35 UTC3h 45m
2026-07-02 UAL1450 - Jul 2, 18:50 UTCJul 2, 21:10 UTC2h 20m
2026-07-02 UAL526 - Jul 2, 13:55 UTCJul 2, 16:20 UTC2h 25m
2026-07-02 UAL2649 DEN → ORD Jul 2, 03:39 UTCJul 2, 05:15 UTC1h 36m
2026-07-02 UAL2649 DEN → ORD Jul 2, 03:40 UTCJul 2, 05:30 UTC1h 50m

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 N14549 page for operator, model, and routing details .

Mode-S A0B849 frequently asked

What is Mode-S code A0B849?
A0B849 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14549.
Where is Mode-S A0B849 registered?
Mode-S code A0B849 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 A0B849 broadcasting right now?
Yes. Mode-S A0B849 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B849, octal 50134111, decimal 10,532,937.
What flights does A0B849 operate?
Mode-S A0B849 has broadcast 20 distinct callsigns, including UAL800, UAL2292, UAL1568, UAL1132, UAL540.