Apparatus

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sensors Mode-S transponder

A86AB5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N641UA · BOEING 767-300 · operated by UNITED AIRLINES INC

Hex
A86AB5
Octal
52065265
Decimal
11,037,365
Country
US
Tail
N641UA
Type
B763
No current signal · last broadcast Jul 26, 18:15 UTC
Flights observed
226
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:15 UTC

Last known position

Most recent position reported by Mode-S A86AB5.

Country allocation

The ICAO 24-bit address A86AB5 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
UAL129 United Airlines 16 2026-07-24
UAL128 United Airlines 16 2026-07-25
UAL21 United Airlines 15 2026-07-23
UAL854 - 14 2026-07-15
UAL52 - 14 2026-07-01
UAL946 United Airlines 13 2026-07-22
UAL20 United Airlines 13 2026-07-25
UAL947 United Airlines 11 2026-07-26
UAL855 - 11 2026-07-16
UAL53 - 10 2026-07-02
UAL331 United Airlines 10 2026-05-10
UAL330 United Airlines 10 2026-05-10
UAL322 United Airlines 10 2026-07-22
UAL991 United Airlines 8 2026-05-21
UAL992 United Airlines 7 2026-05-21
UAL925 United Airlines 7 2026-05-18
UAL924 United Airlines 7 2026-05-18
UAL321 United Airlines 7 2026-07-21
UAL243 - 5 2026-07-01
UAL749 United Airlines 4 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL947 AMS → IAD Jul 26, 09:55 UTCJul 26, 11:15 UTC1h 20m
2026-07-26 UAL947 AMS → IAD Jul 26, 09:50 UTCJul 26, 18:16 UTC8h 26m
2026-07-26 UAL947 AMS → IAD Jul 26, 09:50 UTCJul 26, 18:03 UTC8h 13m
2026-07-25 UAL20 IAH → AMS Jul 25, 21:45 UTCJul 26, 06:55 UTC9h 11m
2026-07-25 UAL20 IAH → AMS Jul 25, 21:47 UTCJul 26, 06:46 UTC8h 59m
2026-07-25 UAL128 GIG → IAH Jul 25, 00:35 UTCJul 25, 10:15 UTC9h 40m
2026-07-24 UAL129 IAH → GIG Jul 24, 01:45 UTCJul 24, 11:35 UTC9h 50m
2026-07-23 UAL21 AMS → IAH Jul 23, 09:30 UTCJul 23, 20:00 UTC10h 30m
2026-07-22 UAL946 IAD → AMS Jul 22, 22:00 UTCJul 23, 05:21 UTC7h 21m
2026-07-22 UAL946 IAD → AMS Jul 22, 22:15 UTCJul 23, 05:30 UTC7h 15m
2026-07-22 UAL322 BOI → DEN Jul 22, 10:20 UTCJul 22, 17:15 UTC6h 55m
2026-07-21 UAL321 ATL → EWR Jul 21, 21:40 UTCJul 22, 05:25 UTC7h 45m
2026-07-21 UAL322 BOI → DEN Jul 21, 07:55 UTCJul 21, 17:00 UTC9h 5m
2026-07-20 UAL321 ATL → EWR Jul 20, 21:55 UTCJul 21, 05:50 UTC7h 55m
2026-07-20 UAL947 AMS → IAD Jul 20, 09:45 UTCJul 20, 17:45 UTC8h 0m
2026-07-19 UAL20 IAH → AMS Jul 19, 22:25 UTCJul 20, 07:45 UTC9h 20m
2026-07-19 UAL20 IAH → AMS Jul 19, 21:47 UTCJul 20, 07:31 UTC9h 44m
2026-07-19 UAL128 GIG → IAH Jul 19, 03:00 UTCJul 19, 12:00 UTC9h 0m
2026-07-19 UAL128 GIG → IAH Jul 19, 01:50 UTCJul 19, 02:00 UTC10m
2026-07-18 UAL129 IAH → GIG Jul 18, 01:45 UTCJul 18, 11:40 UTC9h 56m
2026-07-16 UAL855 - Jul 16, 06:30 UTCJul 16, 12:25 UTC5h 55m
2026-07-15 UAL854 - Jul 15, 22:05 UTCJul 16, 03:55 UTC5h 50m
2026-07-15 UAL128 - Jul 15, 00:35 UTCJul 15, 10:30 UTC9h 55m
2026-07-14 UAL129 - Jul 14, 01:30 UTCJul 14, 11:10 UTC9h 40m
2026-07-13 UAL21 - Jul 13, 09:55 UTCJul 13, 20:15 UTC10h 20m
2026-07-13 UAL21 AMS → IAH Jul 13, 09:35 UTCJul 13, 20:13 UTC10h 38m
2026-07-12 UAL20 - Jul 12, 21:35 UTCJul 13, 07:10 UTC9h 35m
2026-07-12 UAL855 - Jul 12, 06:25 UTCJul 12, 07:01 UTC35m
2026-07-12 UAL855 LIM → IAH Jul 12, 06:13 UTCJul 12, 12:24 UTC6h 11m
2026-07-11 UAL854 - Jul 11, 23:55 UTCJul 12, 03:50 UTC3h 55m
2026-07-11 UAL854 - Jul 11, 22:05 UTCJul 11, 22:25 UTC20m
2026-07-10 UAL4196 - Jul 10, 22:45 UTCJul 10, 23:55 UTC1h 10m
2026-07-08 UAL4197 - Jul 8, 14:20 UTCJul 8, 16:50 UTC2h 30m
2026-07-08 UAL4197 IAD → IAH Jul 8, 13:54 UTCJul 8, 16:45 UTC2h 51m
2026-07-03 UAL21 AMS → IAH Jul 3, 20:05 UTCJul 3, 20:10 UTC5m
2026-07-03 UAL21 AMS → IAH Jul 3, 11:10 UTCJul 3, 19:45 UTC8h 35m
2026-07-03 UAL21 AMS → IAH Jul 3, 11:05 UTCJul 3, 19:38 UTC8h 33m
2026-07-02 UAL946 IAD → AMS Jul 2, 22:35 UTCJul 3, 05:25 UTC6h 50m
2026-07-02 UAL53 ZRH → IAD Jul 2, 10:25 UTCJul 2, 19:10 UTC8h 45m
2026-07-02 UAL53 ZRH → IAD Jul 2, 10:14 UTCJul 2, 19:12 UTC8h 58m
2026-07-01 UAL52 IAD → ZRH Jul 1, 22:23 UTCJul 2, 05:54 UTC7h 31m
2026-07-01 UAL52 - Jul 1, 22:25 UTCJul 2, 05:15 UTC6h 50m
2026-07-01 UAL243 - Jul 1, 08:25 UTCJul 1, 11:00 UTC2h 35m
2026-07-01 UAL243 NCE → IAD Jul 1, 08:24 UTCJul 1, 17:27 UTC9h 3m
2026-07-01 UAL243 NCE → IAD Jul 1, 08:24 UTCJul 1, 17:33 UTC9h 9m
2026-06-30 UAL242 IAD → NCE Jun 30, 21:48 UTCJul 1, 05:27 UTC7h 39m
2026-06-30 UAL242 IAD → NCE Jun 30, 21:40 UTCJul 1, 05:30 UTC7h 50m
2026-06-30 UAL322 - Jun 30, 08:40 UTCJun 30, 10:50 UTC2h 10m
2026-06-30 UAL322 - Jun 30, 08:00 UTCJun 30, 08:35 UTC35m
2026-06-30 UAL322 VCE → IAD Jun 30, 08:04 UTCJun 30, 17:09 UTC9h 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 N641UA page for operator, model, and routing details .

Mode-S A86AB5 frequently asked

What is Mode-S code A86AB5?
A86AB5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N641UA.
Where is Mode-S A86AB5 registered?
Mode-S code A86AB5 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 A86AB5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A86AB5, octal 52065265, decimal 11,037,365.
What flights does A86AB5 operate?
Mode-S A86AB5 has broadcast 20 distinct callsigns, including UAL129, UAL128, UAL21, UAL854, UAL52.