Apparatus

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sensors Mode-S transponder

A8D76B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N669UA · BOEING 767-300 · operated by UNITED AIRLINES INC

Hex
A8D76B
Octal
52153553
Decimal
11,065,195
Country
US
Tail
N669UA
Type
B763
Broadcasting now · callsign UAL967 · 34,000 ft
Flights observed
202
Distinct callsigns
20
Country
US
Last broadcast
13m ago

Current position

A8D76B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8D76B 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
UAL929 - 13 2026-07-06
UAL12 - 12 2026-06-29
UAL921 - 10 2026-06-25
UAL3 United Airlines 9 2026-06-28
UAL146 - 9 2026-07-13
UAL16 - 8 2026-06-24
UAL134 - 8 2026-07-09
UAL967 - 7 2026-07-14
UAL966 - 6 2026-07-14
UAL958 - 6 2026-07-06
UAL934 United Airlines 6 2026-06-05
UAL928 United Airlines 6 2026-05-26
UAL381 - 6 2026-07-12
UAL147 - 6 2026-06-16
UAL964 - 5 2026-06-26
UAL941 United Airlines 5 2026-05-17
UAL17 - 5 2026-07-07
UAL15 - 5 2026-07-13
UAL135 - 5 2026-07-10
UAL965 - 4 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL967 - Jul 14, 12:40 UTCJul 14, 14:45 UTC2h 5m
2026-07-14 UAL966 - Jul 14, 01:10 UTCJul 14, 09:20 UTC8h 10m
2026-07-13 UAL15 - Jul 13, 15:25 UTCJul 13, 22:25 UTC7h 0m
2026-07-13 UAL15 LHR → EWR Jul 13, 14:44 UTCJul 13, 22:20 UTC7h 36m
2026-07-13 UAL146 EWR → LHR Jul 13, 02:35 UTCJul 13, 09:15 UTC6h 40m
2026-07-12 UAL381 - Jul 12, 07:10 UTCJul 12, 16:30 UTC9h 20m
2026-07-12 UAL381 BRI → EWR Jul 12, 07:18 UTCJul 12, 16:30 UTC9h 12m
2026-07-11 UAL380 - Jul 11, 19:50 UTCJul 12, 04:10 UTC8h 20m
2026-07-10 UAL135 ZRH → EWR Jul 10, 08:40 UTCJul 10, 17:20 UTC8h 40m
2026-07-09 UAL134 EWR → ZRH Jul 9, 22:39 UTCJul 10, 06:50 UTC8h 11m
2026-07-09 UAL134 - Jul 9, 23:40 UTCJul 10, 04:45 UTC5h 5m
2026-07-09 UAL135 - Jul 9, 10:30 UTCJul 9, 18:45 UTC8h 15m
2026-07-09 UAL135 ZRH → EWR Jul 9, 10:07 UTCJul 9, 18:42 UTC8h 35m
2026-07-09 UAL134 - Jul 9, 00:45 UTCJul 9, 08:00 UTC7h 15m
2026-07-07 UAL17 - Jul 7, 10:00 UTCJul 7, 11:10 UTC1h 10m
2026-07-07 UAL17 LHR → EWR Jul 7, 09:50 UTCJul 7, 17:14 UTC7h 24m
2026-07-07 UAL920 ORD → LHR Jul 7, 00:07 UTCJul 7, 07:27 UTC7h 20m
2026-07-07 UAL920 ORD → LHR Jul 7, 00:00 UTCJul 7, 07:30 UTC7h 30m
2026-07-06 UAL958 - Jul 6, 07:50 UTCJul 6, 15:55 UTC8h 5m
2026-07-06 UAL929 - Jul 6, 05:25 UTCJul 6, 05:40 UTC15m
2026-07-05 UAL929 - Jul 5, 22:25 UTCJul 6, 05:20 UTC6h 55m
2026-07-05 UAL2331 IAD → RDU Jul 5, 17:30 UTCJul 5, 19:05 UTC1h 35m
2026-07-05 UAL2277 IAD → TPA Jul 5, 17:05 UTCJul 5, 19:14 UTC2h 9m
2026-07-05 UAL2277 ORD → IAD Jul 5, 14:45 UTCJul 5, 16:00 UTC1h 15m
2026-06-30 UAL959 - Jun 30, 11:30 UTCJun 30, 19:45 UTC8h 15m
2026-06-30 UAL959 LHR → ORD Jun 30, 11:25 UTCJun 30, 19:28 UTC8h 3m
2026-06-29 UAL929 ORD → LHR Jun 29, 22:39 UTCJun 30, 05:55 UTC7h 15m
2026-06-29 UAL12 ZRH → ORD Jun 29, 08:09 UTCJun 29, 17:24 UTC9h 15m
2026-06-28 UAL3 LAX → HNL Jun 28, 21:52 UTCJun 29, 05:54 UTC8h 2m
2026-06-28 UAL3 LAX → HNL Jun 28, 21:45 UTCJun 29, 05:59 UTC8h 15m
2026-06-28 UAL12 ZRH → ORD Jun 28, 08:19 UTCJun 28, 17:19 UTC9h 0m
2026-06-27 UAL134 EWR → ZRH Jun 27, 23:04 UTCJun 28, 06:20 UTC7h 15m
2026-06-27 UAL965 - Jun 27, 08:55 UTCJun 27, 17:55 UTC9h 0m
2026-06-26 UAL964 EWR → NAP Jun 26, 20:43 UTCJun 27, 04:23 UTC7h 40m
2026-06-26 UAL964 - Jun 26, 20:34 UTCJun 27, 04:15 UTC7h 40m
2026-06-25 UAL921 - Jun 25, 18:00 UTCJun 26, 01:34 UTC7h 35m
2026-06-25 UAL921 LHR → EWR Jun 25, 17:47 UTCJun 26, 01:35 UTC7h 48m
2026-06-24 UAL16 EWR → LHR Jun 24, 21:54 UTCJun 25, 04:10 UTC6h 15m
2026-06-24 UAL963 - Jun 24, 08:20 UTCJun 24, 08:45 UTC25m
2026-06-24 UAL963 BER → EWR Jun 24, 08:21 UTCJun 24, 16:48 UTC8h 27m
2026-06-24 UAL963 BER → EWR Jun 24, 08:21 UTCJun 24, 16:54 UTC8h 33m
2026-06-23 UAL962 EWR → BER Jun 23, 23:00 UTCJun 24, 05:59 UTC7h 0m
2026-06-23 UAL962 EWR → BER Jun 23, 22:03 UTCJun 24, 05:53 UTC7h 50m
2026-06-22 UAL967 NAP → EWR Jun 22, 12:44 UTCJun 22, 21:31 UTC8h 47m
2026-06-22 UAL967 - Jun 22, 12:25 UTCJun 22, 21:40 UTC9h 15m
2026-06-22 UAL966 EWR → NAP Jun 22, 01:11 UTCJun 22, 09:22 UTC8h 11m
2026-06-22 UAL966 - Jun 22, 01:05 UTCJun 22, 09:14 UTC8h 10m
2026-06-21 UAL3938 SEA → SFO Jun 21, 18:54 UTCJun 21, 19:39 UTC45m
2026-06-21 UAL322 BOI → DEN Jun 21, 08:15 UTCJun 21, 08:44 UTC30m
2026-06-21 UAL322 VCE → IAD Jun 21, 08:04 UTCJun 21, 17:26 UTC9h 22m

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 N669UA page for operator, model, and routing details .

Mode-S A8D76B frequently asked

What is Mode-S code A8D76B?
A8D76B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N669UA.
Where is Mode-S A8D76B registered?
Mode-S code A8D76B 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 A8D76B broadcasting right now?
Yes. Mode-S A8D76B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8D76B, octal 52153553, decimal 11,065,195.
What flights does A8D76B operate?
Mode-S A8D76B has broadcast 20 distinct callsigns, including UAL929, UAL12, UAL921, UAL3, UAL146.