Apparatus

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sensors Mode-S transponder

A8BD6A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N662UA · BOEING 767-300 · operated by UNITED AIRLINES INC

Hex
A8BD6A
Octal
52136552
Decimal
11,058,538
Country
US
Tail
N662UA
Type
B763
No current signal · last broadcast 1h ago
Flights observed
231
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A8BD6A.

Country allocation

The ICAO 24-bit address A8BD6A 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
UAL147 - 13 2026-07-06
UAL12 - 12 2026-07-04
UAL959 United Airlines 10 2026-05-26
UAL958 - 10 2026-07-09
UAL940 - 10 2026-07-11
UAL941 - 9 2026-07-12
UAL934 United Airlines 9 2026-07-08
UAL146 - 9 2026-06-21
UAL3 United Airlines 8 2026-07-03
UAL272 - 8 2026-07-14
UAL17 - 8 2026-07-05
UAL15 - 8 2026-07-10
UAL134 - 8 2026-06-29
UAL963 - 7 2026-07-07
UAL962 United Airlines 7 2026-07-06
UAL938 - 6 2026-07-12
UAL928 - 6 2026-07-11
UAL920 United Airlines 6 2026-07-01
UAL55 United Airlines 6 2026-05-05
UAL306 United Airlines 6 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL272 - Jul 14, 00:55 UTCJul 14, 08:30 UTC7h 35m
2026-07-12 UAL941 - Jul 12, 15:50 UTCJul 12, 16:30 UTC40m
2026-07-12 UAL941 LHR → EWR Jul 12, 15:24 UTCJul 12, 22:57 UTC7h 33m
2026-07-12 UAL941 LHR → EWR Jul 12, 15:24 UTCJul 12, 23:01 UTC7h 37m
2026-07-12 UAL938 ORD → LHR Jul 12, 03:33 UTCJul 12, 10:54 UTC7h 21m
2026-07-12 UAL938 - Jul 12, 03:30 UTCJul 12, 10:30 UTC7h 0m
2026-07-11 UAL928 LHR → ORD Jul 11, 13:55 UTCJul 11, 22:05 UTC8h 10m
2026-07-11 UAL940 EWR → LHR Jul 11, 01:21 UTCJul 11, 08:01 UTC6h 40m
2026-07-11 UAL940 - Jul 11, 01:35 UTCJul 11, 02:30 UTC55m
2026-07-10 UAL15 LHR → EWR Jul 10, 15:25 UTCJul 10, 22:50 UTC7h 25m
2026-07-09 UAL929 ORD → LHR Jul 9, 22:10 UTCJul 10, 05:35 UTC7h 25m
2026-07-09 UAL958 LHR → ORD Jul 9, 07:35 UTCJul 9, 15:50 UTC8h 15m
2026-07-09 UAL958 LHR → ORD Jul 9, 07:09 UTCJul 9, 15:38 UTC8h 29m
2026-07-08 UAL934 EWR → LHR Jul 8, 12:57 UTCJul 8, 19:31 UTC6h 34m
2026-07-08 UAL934 EWR → LHR Jul 8, 12:50 UTCJul 8, 18:30 UTC5h 40m
2026-07-07 UAL963 - Jul 7, 08:05 UTCJul 7, 16:30 UTC8h 25m
2026-07-07 UAL963 BER → EWR Jul 7, 08:11 UTCJul 7, 16:35 UTC8h 24m
2026-07-06 UAL962 EWR → BER Jul 6, 21:45 UTCJul 7, 04:45 UTC7h 0m
2026-07-06 UAL147 - Jul 6, 11:25 UTCJul 6, 19:00 UTC7h 35m
2026-07-06 UAL940 EWR → LHR Jul 6, 01:26 UTCJul 6, 08:13 UTC6h 47m
2026-07-06 UAL940 - Jul 6, 02:10 UTCJul 6, 03:35 UTC1h 25m
2026-07-05 UAL17 - Jul 5, 10:00 UTCJul 5, 17:25 UTC7h 25m
2026-07-05 UAL929 - Jul 5, 00:30 UTCJul 5, 05:35 UTC5h 5m
2026-07-04 UAL929 - Jul 4, 22:25 UTCJul 5, 00:25 UTC2h 0m
2026-07-04 UAL12 ZRH → ORD Jul 4, 08:19 UTCJul 4, 18:19 UTC10h 0m
2026-07-04 UAL12 ZRH → ORD Jul 4, 08:25 UTCJul 4, 18:25 UTC10h 0m
2026-07-03 UAL3 LAX → HNL Jul 3, 21:30 UTCJul 4, 05:35 UTC8h 5m
2026-07-03 UAL958 - Jul 3, 07:20 UTCJul 3, 15:35 UTC8h 15m
2026-07-02 UAL934 EWR → LHR Jul 2, 12:40 UTCJul 2, 19:30 UTC6h 50m
2026-07-01 UAL147 - Jul 1, 12:15 UTCJul 1, 20:00 UTC7h 45m
2026-07-01 UAL920 ORD → LHR Jul 1, 00:35 UTCJul 1, 08:00 UTC7h 25m
2026-06-30 UAL12 ZRH → ORD Jun 30, 09:10 UTCJun 30, 18:20 UTC9h 10m
2026-06-29 UAL134 EWR → ZRH Jun 29, 23:34 UTCJun 30, 06:19 UTC6h 45m
2026-06-29 UAL134 - Jun 29, 23:25 UTCJun 30, 04:30 UTC5h 6m
2026-06-29 UAL17 - Jun 29, 10:15 UTCJun 29, 10:29 UTC15m
2026-06-29 UAL17 LHR → EWR Jun 29, 09:50 UTCJun 29, 17:35 UTC7h 45m
2026-06-29 UAL17 LHR → EWR Jun 29, 09:50 UTCJun 29, 17:32 UTC7h 42m
2026-06-28 UAL16 EWR → LHR Jun 28, 21:58 UTCJun 29, 04:16 UTC6h 18m
2026-06-28 UAL16 - Jun 28, 21:45 UTCJun 28, 22:29 UTC45m
2026-06-28 UAL135 - Jun 28, 08:50 UTCJun 28, 17:19 UTC8h 30m
2026-06-27 UAL3 LAX → HNL Jun 27, 21:19 UTCJun 28, 05:29 UTC8h 10m
2026-06-27 UAL12 ZRH → ORD Jun 27, 08:19 UTCJun 27, 17:27 UTC9h 8m
2026-06-27 UAL12 ZRH → ORD Jun 27, 08:19 UTCJun 27, 17:03 UTC8h 44m
2026-06-27 UAL12 - Jun 27, 08:14 UTCJun 27, 08:29 UTC15m
2026-06-26 UAL3 LAX → HNL Jun 26, 21:15 UTCJun 27, 05:35 UTC8h 20m
2026-06-26 UAL12 - Jun 26, 17:29 UTCJun 26, 17:40 UTC10m
2026-06-26 UAL12 ZRH → ORD Jun 26, 08:19 UTCJun 26, 17:13 UTC8h 54m
2026-06-26 UAL12 ZRH → ORD Jun 26, 08:19 UTCJun 26, 17:28 UTC9h 9m
2026-06-26 UAL12 - Jun 26, 08:20 UTCJun 26, 10:20 UTC2h 0m
2026-06-25 UAL3 LAX → HNL Jun 25, 21:10 UTCJun 26, 05:10 UTC8h 0m

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 N662UA page for operator, model, and routing details .

Mode-S A8BD6A frequently asked

What is Mode-S code A8BD6A?
A8BD6A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N662UA.
Where is Mode-S A8BD6A registered?
Mode-S code A8BD6A 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 A8BD6A 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 A8BD6A, octal 52136552, decimal 11,058,538.
What flights does A8BD6A operate?
Mode-S A8BD6A has broadcast 20 distinct callsigns, including UAL147, UAL12, UAL959, UAL958, UAL940.