Apparatus

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sensors Mode-S transponder

A0B7FA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14520 · operated by UNITED AIRLINES INC

Hex
A0B7FA
Octal
50133772
Decimal
10,532,858
Country
US
Tail
N14520
Type
A21N
No current signal · last broadcast 4h ago
Flights observed
369
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A0B7FA.

Country allocation

The ICAO 24-bit address A0B7FA 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 - 6 2026-06-25
UAL789 - 5 2026-06-28
UAL746 - 5 2026-06-28
UAL2258 - 5 2026-07-14
UAL1889 - 5 2026-06-29
UAL1865 United Airlines 5 2026-04-30
UAL1729 - 5 2026-06-14
UAL1119 - 5 2026-07-13
UAL800 - 4 2026-06-12
UAL2829 - 4 2026-07-05
UAL2683 United Airlines 4 2026-05-27
UAL2666 United Airlines 4 2026-06-21
UAL2499 - 4 2026-06-30
UAL2408 - 4 2026-07-10
UAL2135 - 4 2026-07-04
UAL2132 - 4 2026-06-29
UAL2089 United Airlines 4 2026-05-12
UAL1599 - 4 2026-07-07
UAL1448 - 4 2026-07-03
UAL1442 United Airlines 4 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL2258 DEN → ORD Jul 14, 01:30 UTCJul 14, 03:30 UTC2h 0m
2026-07-13 UAL1132 CUN → DEN Jul 13, 19:45 UTCJul 13, 23:35 UTC3h 50m
2026-07-13 UAL1119 DEN → CUN Jul 13, 14:05 UTCJul 13, 17:45 UTC3h 40m
2026-07-13 UAL1792 EWR → DEN Jul 13, 01:27 UTCJul 13, 04:49 UTC3h 22m
2026-07-13 UAL1792 EWR → DEN Jul 13, 01:30 UTCJul 13, 04:50 UTC3h 20m
2026-07-12 UAL1505 DEN → EWR Jul 12, 20:10 UTCJul 12, 23:45 UTC3h 35m
2026-07-12 UAL2455 EWR → DEN Jul 12, 14:30 UTCJul 12, 17:45 UTC3h 15m
2026-07-11 UAL1715 DEN → EWR Jul 11, 22:45 UTCJul 12, 02:30 UTC3h 45m
2026-07-11 UAL577 - Jul 11, 19:15 UTCJul 11, 21:20 UTC2h 5m
2026-07-11 UAL577 - Jul 11, 17:50 UTCJul 11, 19:10 UTC1h 20m
2026-07-11 UAL2345 DEN → EWR Jul 11, 12:18 UTCJul 11, 15:19 UTC3h 1m
2026-07-11 UAL2345 DEN → EWR Jul 11, 12:10 UTCJul 11, 15:20 UTC3h 10m
2026-07-11 UAL767 ORD → DEN Jul 11, 01:45 UTCJul 11, 03:40 UTC1h 55m
2026-07-10 UAL2071 MCO → ORD Jul 10, 20:35 UTCJul 10, 23:05 UTC2h 30m
2026-07-10 UAL2008 IAH → LGA Jul 10, 16:30 UTCJul 10, 18:30 UTC2h 0m
2026-07-10 UAL2008 IAH → LGA Jul 10, 16:29 UTCJul 10, 18:38 UTC2h 9m
2026-07-10 UAL1775 IAD → ORD Jul 10, 12:25 UTCJul 10, 14:05 UTC1h 40m
2026-07-10 UAL2408 DEN → IAD Jul 10, 01:25 UTCJul 10, 04:30 UTC3h 5m
2026-07-09 UAL2803 ORD → DEN Jul 9, 20:06 UTCJul 9, 23:12 UTC3h 6m
2026-07-09 UAL2803 ORD → DEN Jul 9, 20:05 UTCJul 9, 23:15 UTC3h 10m
2026-07-09 UAL2329 DEN → ORD Jul 9, 15:50 UTCJul 9, 17:50 UTC2h 0m
2026-07-09 UAL2031 IAD → DEN Jul 9, 10:40 UTCJul 9, 13:55 UTC3h 15m
2026-07-09 UAL2408 DEN → IAD Jul 9, 01:15 UTCJul 9, 04:25 UTC3h 10m
2026-07-08 UAL540 SFO → DEN Jul 8, 20:40 UTCJul 8, 22:55 UTC2h 15m
2026-07-08 UAL1506 SFO → ORD Jul 8, 16:45 UTCJul 8, 19:00 UTC2h 15m
2026-07-08 UAL459 - Jul 8, 12:05 UTCJul 8, 14:05 UTC2h 0m
2026-07-08 UAL459 PDX → DEN Jul 8, 12:11 UTCJul 8, 14:03 UTC1h 52m
2026-07-08 UAL498 DEN → PDX Jul 8, 02:30 UTCJul 8, 04:40 UTC2h 10m
2026-07-07 UAL484 - Jul 7, 22:35 UTCJul 8, 00:55 UTC2h 20m
2026-07-07 UAL1599 - Jul 7, 18:10 UTCJul 7, 20:05 UTC1h 55m
2026-07-07 UAL1599 DEN → IAH Jul 7, 17:56 UTCJul 7, 20:00 UTC2h 4m
2026-07-07 UAL647 BOS → DEN Jul 7, 12:15 UTCJul 7, 16:05 UTC3h 50m
2026-07-07 UAL1356 DEN → BOS Jul 7, 00:55 UTCJul 7, 04:20 UTC3h 25m
2026-07-06 UAL1411 PDX → DEN Jul 6, 20:00 UTCJul 6, 22:00 UTC2h 0m
2026-07-06 UAL1994 SFO → PDX Jul 6, 14:20 UTCJul 6, 18:05 UTC3h 45m
2026-07-06 UAL2085 DEN → ORD Jul 6, 02:05 UTCJul 6, 04:00 UTC1h 55m
2026-07-06 UAL2085 DEN → ORD Jul 6, 02:02 UTCJul 6, 03:47 UTC1h 45m
2026-07-05 UAL1132 CUN → DEN Jul 5, 19:55 UTCJul 6, 00:10 UTC4h 15m
2026-07-05 UAL1119 DEN → CUN Jul 5, 14:10 UTCJul 5, 17:35 UTC3h 25m
2026-07-05 UAL2829 LAX → DEN Jul 5, 03:23 UTCJul 5, 04:55 UTC1h 32m
2026-07-05 UAL2829 LAX → DEN Jul 5, 03:05 UTCJul 5, 05:00 UTC1h 55m
2026-07-04 UAL576 - Jul 4, 22:20 UTCJul 5, 02:05 UTC3h 45m
2026-07-04 UAL1946 ORD → LGA Jul 4, 15:30 UTCJul 4, 19:35 UTC4h 5m
2026-07-04 UAL661 ORD → EWR Jul 4, 07:45 UTCJul 4, 11:30 UTC3h 45m
2026-07-04 UAL2135 - Jul 4, 05:45 UTCJul 4, 06:15 UTC30m
2026-07-04 UAL2135 - Jul 4, 03:30 UTCJul 4, 06:15 UTC2h 45m
2026-07-04 UAL2135 IAH → ORD Jul 4, 03:21 UTCJul 4, 05:26 UTC2h 5m
2026-07-03 UAL1448 - Jul 3, 20:45 UTCJul 3, 22:45 UTC2h 0m
2026-07-03 UAL2258 - Jul 3, 17:25 UTCJul 3, 18:10 UTC45m
2026-07-03 UAL2258 MKE → ORD Jul 3, 16:45 UTCJul 3, 17:44 UTC59m

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 N14520 page for operator, model, and routing details .

Mode-S A0B7FA frequently asked

What is Mode-S code A0B7FA?
A0B7FA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14520.
Where is Mode-S A0B7FA registered?
Mode-S code A0B7FA 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 A0B7FA broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B7FA, octal 50133772, decimal 10,532,858.
What flights does A0B7FA operate?
Mode-S A0B7FA has broadcast 20 distinct callsigns, including UAL2088, UAL789, UAL746, UAL2258, UAL1889.