Apparatus

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sensors Mode-S transponder

A0B826

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14539 · operated by UNITED AIRLINES INC

Hex
A0B826
Octal
50134046
Decimal
10,532,902
Country
US
Tail
N14539
Type
A21N
No current signal · last broadcast Jul 26, 20:00 UTC
Flights observed
446
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:00 UTC

Last known position

Most recent position reported by Mode-S A0B826.

Country allocation

The ICAO 24-bit address A0B826 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
UAL660 - 7 2026-07-10
UAL2865 - 7 2026-07-13
UAL1450 United Airlines 7 2026-07-20
UAL706 - 5 2026-06-25
UAL2431 - 5 2026-06-17
UAL2179 United Airlines 5 2026-07-24
UAL2106 - 5 2026-06-27
UAL1924 - 5 2026-07-09
UAL1023 - 5 2026-06-26
UAL1013 - 5 2026-06-17
UAL558 - 4 2026-07-15
UAL540 - 4 2026-06-18
UAL405 United Airlines 4 2026-06-02
UAL2843 - 4 2026-06-26
UAL2254 United Airlines 4 2026-06-09
UAL2197 - 4 2026-07-12
UAL2113 United Airlines 4 2026-06-08
UAL2088 - 4 2026-06-22
UAL1954 United Airlines 4 2026-05-26
UAL1940 United Airlines 4 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1496 FLL → EWR Jul 26, 16:30 UTCJul 26, 20:00 UTC3h 30m
2026-07-26 UAL337 DEN → DFW Jul 26, 13:15 UTCJul 26, 14:35 UTC1h 20m
2026-07-25 UAL8107 IAD → TPA Jul 25, 21:55 UTCJul 26, 00:55 UTC3h 0m
2026-07-25 UAL1568 ORD → SFO Jul 25, 15:40 UTCJul 25, 19:20 UTC3h 40m
2026-07-24 UAL511 IAH → SFO Jul 24, 22:03 UTCJul 25, 02:15 UTC4h 12m
2026-07-24 UAL511 IAH → SFO Jul 24, 22:10 UTCJul 25, 02:20 UTC4h 10m
2026-07-24 UAL2475 ORD → CLE Jul 24, 16:45 UTCJul 24, 19:05 UTC2h 20m
2026-07-24 UAL2475 ORD → CLE Jul 24, 16:48 UTCJul 24, 18:48 UTC2h 0m
2026-07-24 UAL2280 LAX → BOS Jul 24, 13:10 UTCJul 24, 15:15 UTC2h 5m
2026-07-24 UAL368 EWR → FLL Jul 24, 07:40 UTCJul 24, 11:20 UTC3h 40m
2026-07-24 UAL2179 LGA → ORD Jul 24, 01:45 UTCJul 24, 06:10 UTC4h 25m
2026-07-24 UAL2179 LGA → ORD Jul 24, 01:42 UTCJul 24, 06:07 UTC4h 25m
2026-07-23 UAL2618 IAD → SFO Jul 23, 19:20 UTCJul 23, 22:45 UTC3h 25m
2026-07-23 UAL360 DFW → EWR Jul 23, 01:35 UTCJul 23, 04:00 UTC2h 25m
2026-07-22 UAL1132 CUN → DEN Jul 22, 19:25 UTCJul 22, 23:35 UTC4h 10m
2026-07-22 UAL1119 DEN → CUN Jul 22, 14:15 UTCJul 22, 17:45 UTC3h 30m
2026-07-22 UAL2339 - Jul 22, 01:55 UTCJul 22, 03:50 UTC1h 55m
2026-07-21 UAL489 - Jul 21, 22:00 UTCJul 21, 23:55 UTC1h 55m
2026-07-21 UAL2168 JAX → IAH Jul 21, 17:50 UTCJul 21, 19:40 UTC1h 50m
2026-07-21 UAL1720 - Jul 21, 14:00 UTCJul 21, 16:00 UTC2h 0m
2026-07-21 UAL1214 DEN → EWR Jul 21, 01:35 UTCJul 21, 03:40 UTC2h 5m
2026-07-20 UAL1450 EWR → PBI Jul 20, 19:03 UTCJul 20, 21:18 UTC2h 15m
2026-07-20 UAL1450 EWR → PBI Jul 20, 19:20 UTCJul 20, 21:20 UTC2h 0m
2026-07-20 UAL526 - Jul 20, 14:15 UTCJul 20, 16:15 UTC2h 0m
2026-07-19 UAL2201 DCA → ORD Jul 19, 14:45 UTCJul 19, 16:25 UTC1h 40m
2026-07-19 UAL1077 - Jul 19, 11:15 UTCJul 19, 12:35 UTC1h 20m
2026-07-19 UAL2497 ORD → BOS Jul 19, 03:20 UTCJul 19, 05:00 UTC1h 40m
2026-07-19 UAL2497 ORD → BOS Jul 19, 02:39 UTCJul 19, 04:42 UTC2h 3m
2026-07-18 UAL2853 DEN → IAD Jul 18, 18:49 UTCJul 18, 22:21 UTC3h 32m
2026-07-18 UAL2853 DEN → IAD Jul 18, 18:45 UTCJul 18, 22:25 UTC3h 40m
2026-07-18 UAL1450 EWR → PBI Jul 18, 14:55 UTCJul 18, 16:45 UTC1h 50m
2026-07-18 UAL1253 PHX → ORD Jul 18, 03:30 UTCJul 18, 05:30 UTC2h 0m
2026-07-17 UAL1197 - Jul 17, 21:44 UTCJul 18, 01:15 UTC3h 30m
2026-07-17 UAL1423 DEN → EWR Jul 17, 16:24 UTCJul 17, 20:15 UTC3h 50m
2026-07-17 UAL670 EWR → DEN Jul 17, 10:40 UTCJul 17, 14:04 UTC3h 25m
2026-07-16 UAL1715 DEN → EWR Jul 16, 22:19 UTCJul 17, 01:31 UTC3h 12m
2026-07-16 UAL1715 DEN → EWR Jul 16, 22:19 UTCJul 17, 01:35 UTC3h 15m
2026-07-16 UAL1999 EWR → DEN Jul 16, 16:15 UTCJul 16, 19:40 UTC3h 25m
2026-07-16 UAL563 - Jul 16, 12:30 UTCJul 16, 14:05 UTC1h 35m
2026-07-16 UAL563 ORD → EWR Jul 16, 12:43 UTCJul 16, 14:00 UTC1h 17m
2026-07-16 UAL2258 DEN → ORD Jul 16, 01:15 UTCJul 16, 03:10 UTC1h 55m
2026-07-15 UAL2297 BOS → DEN Jul 15, 19:20 UTCJul 15, 23:05 UTC3h 45m
2026-07-15 UAL558 DEN → BOS Jul 15, 14:00 UTCJul 15, 17:30 UTC3h 30m
2026-07-15 UAL1214 SFO → DEN Jul 15, 01:05 UTCJul 15, 03:15 UTC2h 10m
2026-07-14 UAL1450 DEN → SFO Jul 14, 18:45 UTCJul 14, 20:45 UTC2h 0m
2026-07-14 UAL1450 - Jul 14, 14:50 UTCJul 14, 17:00 UTC2h 10m
2026-07-14 UAL475 - Jul 14, 02:00 UTCJul 14, 03:55 UTC1h 55m
2026-07-13 UAL2769 ORD → DEN Jul 13, 21:55 UTCJul 13, 23:50 UTC1h 55m
2026-07-13 UAL2865 DEN → ORD Jul 13, 17:37 UTCJul 13, 19:18 UTC1h 41m
2026-07-13 UAL2865 DEN → ORD Jul 13, 17:30 UTCJul 13, 19:35 UTC2h 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 N14539 page for operator, model, and routing details .

Mode-S A0B826 frequently asked

What is Mode-S code A0B826?
A0B826 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14539.
Where is Mode-S A0B826 registered?
Mode-S code A0B826 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 A0B826 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B826, octal 50134046, decimal 10,532,902.
What flights does A0B826 operate?
Mode-S A0B826 has broadcast 20 distinct callsigns, including UAL660, UAL2865, UAL1450, UAL706, UAL2431.