Apparatus

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sensors Mode-S transponder

A0B7BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14506 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
A0B7BA
Octal
50133672
Decimal
10,532,794
Country
US
Tail
N14506
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
322
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A0B7BA.

Country allocation

The ICAO 24-bit address A0B7BA 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
UAL1812 - 9 2026-07-08
UAL2618 United Airlines 6 2026-06-07
UAL2089 United Airlines 6 2026-06-08
UAL1801 United Airlines 6 2026-06-06
UAL695 United Airlines 5 2026-06-08
UAL534 United Airlines 5 2026-05-07
UAL1856 United Airlines 5 2026-05-06
UAL1755 United Airlines 5 2026-06-15
UAL1561 United Airlines 5 2026-05-12
UAL1421 United Airlines 5 2026-06-15
UAL530 United Airlines 4 2026-04-29
UAL2088 - 4 2026-07-12
UAL2061 - 4 2026-07-09
UAL1638 - 4 2026-07-09
UAL1587 United Airlines 4 2026-04-28
UAL1583 - 4 2026-06-17
UAL8144 United Airlines 3 2026-05-03
UAL706 - 3 2026-07-10
UAL651 United Airlines 3 2026-05-07
UAL574 United Airlines 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL2649 DEN → ORD Jul 14, 03:25 UTCJul 14, 05:25 UTC2h 0m
2026-07-13 UAL1770 MCO → DEN Jul 13, 22:25 UTCJul 14, 01:40 UTC3h 15m
2026-07-13 UAL2354 DEN → MCO Jul 13, 16:30 UTCJul 13, 20:00 UTC3h 30m
2026-07-13 UAL1217 ORD → DEN Jul 13, 12:30 UTCJul 13, 14:25 UTC1h 55m
2026-07-12 UAL2088 - Jul 12, 22:10 UTCJul 13, 00:15 UTC2h 5m
2026-07-12 UAL2088 - Jul 12, 20:01 UTCJul 12, 20:15 UTC15m
2026-07-12 UAL1996 ORD → SJU Jul 12, 14:15 UTCJul 12, 18:35 UTC4h 20m
2026-07-11 UAL2481 - Jul 11, 18:45 UTCJul 11, 21:15 UTC2h 30m
2026-07-11 UAL1643 - Jul 11, 14:50 UTCJul 11, 17:15 UTC2h 25m
2026-07-11 UAL1414 - Jul 11, 10:40 UTCJul 11, 12:45 UTC2h 5m
2026-07-11 UAL1779 ORD → BOS Jul 11, 03:10 UTCJul 11, 04:50 UTC1h 40m
2026-07-10 UAL706 LAS → ORD Jul 10, 21:46 UTCJul 11, 00:51 UTC3h 5m
2026-07-10 UAL706 LAS → ORD Jul 10, 21:55 UTCJul 11, 01:10 UTC3h 15m
2026-07-10 UAL2440 - Jul 10, 16:20 UTCJul 10, 19:45 UTC3h 25m
2026-07-10 UAL1377 DEN → ORD Jul 10, 12:15 UTCJul 10, 14:15 UTC2h 0m
2026-07-10 UAL495 IAD → DEN Jul 10, 04:00 UTCJul 10, 07:45 UTC3h 45m
2026-07-09 UAL421 DEN → IAD Jul 9, 23:00 UTCJul 10, 02:15 UTC3h 15m
2026-07-09 UAL2061 - Jul 9, 18:15 UTCJul 9, 20:15 UTC2h 0m
2026-07-09 UAL1638 - Jul 9, 14:30 UTCJul 9, 16:30 UTC2h 0m
2026-07-09 UAL1214 - Jul 9, 00:45 UTCJul 9, 02:45 UTC2h 0m
2026-07-08 UAL1812 DEN → SFO Jul 8, 20:20 UTCJul 8, 22:35 UTC2h 15m
2026-07-08 UAL1812 DEN → SFO Jul 8, 20:19 UTCJul 8, 22:35 UTC2h 16m
2026-07-07 UAL1770 MCO → DEN Jul 7, 13:30 UTCJul 7, 16:45 UTC3h 15m
2026-07-07 UAL1770 MCO → DEN Jul 7, 13:15 UTCJul 7, 16:43 UTC3h 28m
2026-07-06 UAL2008 IAH → LGA Jul 6, 16:35 UTCJul 6, 18:55 UTC2h 20m
2026-07-06 UAL1377 - Jul 6, 12:10 UTCJul 6, 14:10 UTC2h 0m
2026-07-03 UAL2061 - Jul 3, 18:15 UTCJul 3, 20:00 UTC1h 45m
2026-07-03 UAL2061 LAX → DEN Jul 3, 18:14 UTCJul 3, 19:55 UTC1h 41m
2026-07-03 UAL1262 - Jul 3, 02:40 UTCJul 3, 04:40 UTC2h 0m
2026-07-03 UAL1262 DEN → LAX Jul 3, 02:43 UTCJul 3, 04:35 UTC1h 52m
2026-06-21 UAL1575 - Jun 21, 13:09 UTCJun 21, 15:19 UTC2h 10m
2026-06-21 UAL1475 - Jun 21, 00:29 UTCJun 21, 02:40 UTC2h 10m
2026-06-20 UAL2827 IAH → ORD Jun 20, 20:40 UTCJun 20, 22:39 UTC2h 0m
2026-06-20 UAL723 CLE → IAH Jun 20, 16:01 UTCJun 20, 18:44 UTC2h 43m
2026-06-20 UAL723 CLE → IAH Jun 20, 15:49 UTCJun 20, 16:29 UTC40m
2026-06-19 UAL2148 - Jun 19, 23:25 UTCJun 20, 01:05 UTC1h 40m
2026-06-19 UAL1314 - Jun 19, 20:49 UTCJun 19, 22:04 UTC1h 15m
2026-06-19 UAL2494 RSW → ORD Jun 19, 16:44 UTCJun 19, 19:25 UTC2h 40m
2026-06-19 UAL2494 RSW → ORD Jun 19, 16:44 UTCJun 19, 19:08 UTC2h 24m
2026-06-19 UAL1740 ORD → RSW Jun 19, 12:25 UTCJun 19, 14:49 UTC2h 25m
2026-06-19 UAL2258 DEN → ORD Jun 19, 01:29 UTCJun 19, 03:15 UTC1h 45m
2026-06-18 UAL1729 LGA → DEN Jun 18, 20:05 UTCJun 18, 23:55 UTC3h 50m
2026-06-18 UAL1442 IAH → EWR Jun 18, 14:20 UTCJun 18, 17:21 UTC3h 1m
2026-06-18 UAL1066 - Jun 18, 03:40 UTCJun 18, 05:35 UTC1h 55m
2026-06-17 UAL1954 - Jun 17, 23:20 UTCJun 18, 01:55 UTC2h 35m
2026-06-17 UAL1583 LAS → ORD Jun 17, 17:35 UTCJun 17, 20:50 UTC3h 15m
2026-06-17 UAL2316 DEN → LAS Jun 17, 14:20 UTCJun 17, 15:46 UTC1h 25m
2026-06-17 UAL2610 - Jun 17, 02:00 UTCJun 17, 03:55 UTC1h 55m
2026-06-16 UAL374 - Jun 16, 19:55 UTCJun 16, 23:40 UTC3h 45m
2026-06-16 UAL374 ORD → LAX Jun 16, 20:03 UTCJun 16, 23:34 UTC3h 31m

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 N14506 page for operator, model, and routing details .

Mode-S A0B7BA frequently asked

What is Mode-S code A0B7BA?
A0B7BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14506.
Where is Mode-S A0B7BA registered?
Mode-S code A0B7BA 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 A0B7BA broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B7BA, octal 50133672, decimal 10,532,794.
What flights does A0B7BA operate?
Mode-S A0B7BA has broadcast 20 distinct callsigns, including UAL1812, UAL2618, UAL2089, UAL1801, UAL695.