Apparatus

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sensors Mode-S transponder

A0B820

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14533 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
A0B820
Octal
50134040
Decimal
10,532,896
Country
US
Tail
N14533
Type
A21N
Broadcasting now · callsign UAL2763 · 2,950 ft
Flights observed
454
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Current position

A0B820 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0B820 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
UAL1119 United Airlines 8 2026-06-09
UAL800 United Airlines 7 2026-05-18
UAL540 United Airlines 7 2026-07-25
UAL2331 United Airlines 7 2026-07-26
UAL1066 - 7 2026-07-04
UAL661 United Airlines 6 2026-07-08
UAL475 - 6 2026-07-15
UAL2835 United Airlines 6 2026-07-25
UAL353 - 5 2026-07-12
UAL2633 United Airlines 5 2026-05-08
UAL2436 United Airlines 5 2026-05-09
UAL2361 - 5 2026-07-19
UAL1599 - 5 2026-07-20
UAL1232 United Airlines 5 2026-05-18
UAL1132 United Airlines 5 2026-06-09
UAL526 United Airlines 4 2026-07-24
UAL405 United Airlines 4 2026-06-14
UAL360 - 4 2026-06-14
UAL341 United Airlines 4 2026-07-25
UAL2865 United Airlines 4 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1354 SAT → IAD Jul 26, 20:00 UTCJul 26, 22:00 UTC2h 0m
2026-07-26 UAL1102 MSN → EWR Jul 26, 15:55 UTCJul 26, 18:15 UTC2h 20m
2026-07-26 UAL2631 ORD → MCI Jul 26, 11:30 UTCJul 26, 13:35 UTC2h 5m
2026-07-26 UAL2331 IAD → RDU Jul 26, 00:15 UTCJul 26, 02:00 UTC1h 45m
2026-07-26 UAL2331 IAD → RDU Jul 26, 00:02 UTCJul 26, 02:00 UTC1h 58m
2026-07-25 UAL2835 SEA → ORD Jul 25, 18:05 UTCJul 25, 21:30 UTC3h 25m
2026-07-25 UAL341 EWR → BOS Jul 25, 12:25 UTCJul 25, 16:30 UTC4h 5m
2026-07-25 UAL341 EWR → BOS Jul 25, 12:23 UTCJul 25, 16:25 UTC4h 2m
2026-07-25 UAL1457 DEN → LGA Jul 25, 05:50 UTCJul 25, 09:20 UTC3h 30m
2026-07-25 UAL540 PDX → DEN Jul 25, 01:50 UTCJul 25, 03:40 UTC1h 50m
2026-07-24 UAL2758 IAD → EWR Jul 24, 21:40 UTCJul 24, 23:35 UTC1h 55m
2026-07-24 UAL2758 IAD → EWR Jul 24, 21:48 UTCJul 24, 23:33 UTC1h 45m
2026-07-24 UAL1013 DEN → LAX Jul 24, 18:20 UTCJul 24, 20:10 UTC1h 50m
2026-07-24 UAL526 AMM → IAD Jul 24, 13:55 UTCJul 24, 16:00 UTC2h 5m
2026-07-23 UAL365 STT → ORD Jul 23, 18:35 UTCJul 23, 21:10 UTC2h 35m
2026-07-23 UAL215 IAD → SFO Jul 23, 14:30 UTCJul 23, 17:10 UTC2h 40m
2026-07-23 UAL2197 PHL → ORD Jul 23, 00:25 UTCJul 23, 02:25 UTC2h 0m
2026-07-22 UAL2451 KRK → GDN Jul 22, 19:55 UTCJul 22, 21:50 UTC1h 55m
2026-07-22 UAL2466 SJC → DEN Jul 22, 15:10 UTCJul 22, 17:40 UTC2h 30m
2026-07-22 UAL284 - Jul 22, 11:20 UTCJul 22, 13:30 UTC2h 10m
2026-07-22 UAL540 PDX → DEN Jul 22, 01:45 UTCJul 22, 03:35 UTC1h 50m
2026-07-21 UAL2758 IAD → EWR Jul 21, 21:55 UTCJul 21, 23:55 UTC2h 0m
2026-07-21 UAL1013 DEN → LAX Jul 21, 18:15 UTCJul 21, 20:00 UTC1h 45m
2026-07-21 UAL526 AMM → IAD Jul 21, 14:30 UTCJul 21, 16:35 UTC2h 5m
2026-07-21 UAL353J - Jul 21, 07:15 UTCJul 21, 10:45 UTC3h 30m
2026-07-21 UAL1262 ORD → BOS Jul 21, 02:05 UTCJul 21, 04:05 UTC2h 0m
2026-07-20 UAL484 DEN → LAS Jul 20, 22:00 UTCJul 20, 23:55 UTC1h 54m
2026-07-20 UAL1599 DEN → IAH Jul 20, 17:56 UTCJul 20, 19:56 UTC2h 0m
2026-07-20 UAL1599 - Jul 20, 18:00 UTCJul 20, 20:00 UTC2h 0m
2026-07-20 UAL647 BOS → DEN Jul 20, 11:55 UTCJul 20, 15:55 UTC4h 0m
2026-07-20 UAL2331 ORD → BOS Jul 20, 00:15 UTCJul 20, 02:05 UTC1h 50m
2026-07-19 UAL2113 - Jul 19, 18:55 UTCJul 19, 22:30 UTC3h 35m
2026-07-19 UAL2113 MCO → LAX Jul 19, 18:49 UTCJul 19, 22:10 UTC3h 21m
2026-07-19 UAL2361 - Jul 19, 12:15 UTCJul 19, 15:40 UTC3h 25m
2026-07-19 UAL212K LAX → ORD Jul 19, 01:50 UTCJul 19, 05:35 UTC3h 45m
2026-07-18 UAL1363 SJC → DEN Jul 18, 18:20 UTCJul 18, 21:50 UTC3h 30m
2026-07-18 UAL1363 SJC → DEN Jul 18, 18:29 UTCJul 18, 21:45 UTC3h 16m
2026-07-18 UAL2683 ORD → SAN Jul 18, 14:15 UTCJul 18, 16:30 UTC2h 15m
2026-07-17 UAL1382 PHX → EWR Jul 17, 23:25 UTCJul 18, 01:54 UTC2h 30m
2026-07-17 UAL2797 PHL → ORD Jul 17, 01:15 UTCJul 17, 02:59 UTC1h 45m
2026-07-16 UAL2430 - Jul 16, 22:40 UTCJul 17, 00:10 UTC1h 30m
2026-07-16 UAL609 - Jul 16, 15:05 UTCJul 16, 16:15 UTC1h 10m
2026-07-16 UAL1488 ORD → CLE Jul 16, 12:34 UTCJul 16, 13:20 UTC45m
2026-07-16 UAL1411 DEN → ORD Jul 16, 00:35 UTCJul 16, 02:35 UTC2h 0m
2026-07-15 UAL1729 LGA → DEN Jul 15, 19:45 UTCJul 15, 23:00 UTC3h 15m
2026-07-15 UAL1442 DEN → LGA Jul 15, 14:15 UTCJul 15, 17:40 UTC3h 25m
2026-07-15 UAL1874 - Jul 15, 10:30 UTCJul 15, 12:20 UTC1h 50m
2026-07-15 UAL475 DEN → IAH Jul 15, 01:55 UTCJul 15, 03:48 UTC1h 53m
2026-07-15 UAL475 - Jul 15, 02:00 UTCJul 15, 03:50 UTC1h 50m
2026-07-14 UAL484 - Jul 14, 22:05 UTCJul 15, 00:00 UTC1h 54m

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 N14533 page for operator, model, and routing details .

Mode-S A0B820 frequently asked

What is Mode-S code A0B820?
A0B820 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14533.
Where is Mode-S A0B820 registered?
Mode-S code A0B820 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 A0B820 broadcasting right now?
Yes. Mode-S A0B820 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B820, octal 50134040, decimal 10,532,896.
What flights does A0B820 operate?
Mode-S A0B820 has broadcast 20 distinct callsigns, including UAL1119, UAL800, UAL540, UAL2331, UAL1066.