Apparatus

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sensors Mode-S transponder

A86E6C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N642UA · BOEING 767-300 · operated by UNITED AIRLINES INC

Hex
A86E6C
Octal
52067154
Decimal
11,038,316
Country
US
Tail
N642UA
Type
B763
No current signal · last broadcast 1h ago
Flights observed
187
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A86E6C.

Country allocation

The ICAO 24-bit address A86E6C 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
UAL128 - 18 2026-06-21
UAL947 - 16 2026-07-06
UAL946 - 12 2026-07-13
UAL20 - 11 2026-07-05
UAL243 - 10 2026-07-13
UAL129 - 10 2026-06-20
UAL322 - 9 2026-07-11
UAL242 - 9 2026-07-12
UAL855 - 8 2026-07-05
UAL854 - 8 2026-07-05
UAL52 - 7 2026-06-30
UAL21 United Airlines 7 2026-06-12
UAL748 - 6 2026-06-29
UAL53 - 6 2026-07-01
UAL321 - 6 2026-07-10
UAL127 United Airlines 6 2026-06-10
UAL126 United Airlines 6 2026-06-10
UAL887 United Airlines 4 2026-04-17
UAL886 United Airlines 4 2026-04-17
UAL749 - 4 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL946 IAD → AMS Jul 13, 22:10 UTCJul 14, 05:30 UTC7h 20m
2026-07-13 UAL243 NCE → IAD Jul 13, 09:55 UTCJul 13, 18:25 UTC8h 30m
2026-07-12 UAL242 IAD → NCE Jul 12, 23:00 UTCJul 13, 07:20 UTC8h 20m
2026-07-12 UAL243 NCE → IAD Jul 12, 08:45 UTCJul 12, 17:10 UTC8h 25m
2026-07-11 UAL242 IAD → NCE Jul 11, 22:50 UTCJul 12, 06:40 UTC7h 50m
2026-07-11 UAL322 - Jul 11, 09:50 UTCJul 11, 18:45 UTC8h 55m
2026-07-10 UAL321 IAD → VCE Jul 10, 21:35 UTCJul 11, 05:31 UTC7h 55m
2026-07-09 UAL322 - Jul 9, 08:10 UTCJul 9, 10:05 UTC1h 55m
2026-07-09 UAL322 VCE → IAD Jul 9, 08:13 UTCJul 9, 17:22 UTC9h 9m
2026-07-08 UAL321 - Jul 8, 22:00 UTCJul 9, 00:10 UTC2h 10m
2026-07-08 UAL321 IAD → VCE Jul 8, 21:38 UTCJul 9, 06:11 UTC8h 33m
2026-07-08 UAL322 VCE → IAD Jul 8, 08:40 UTCJul 8, 17:30 UTC8h 50m
2026-07-08 UAL322 VCE → IAD Jul 8, 08:31 UTCJul 8, 17:26 UTC8h 55m
2026-07-07 UAL321 - Jul 7, 22:25 UTCJul 8, 06:25 UTC8h 0m
2026-07-07 UAL321 IAD → VCE Jul 7, 21:53 UTCJul 8, 06:21 UTC8h 28m
2026-07-06 UAL947 AMS → IAD Jul 6, 09:50 UTCJul 6, 18:30 UTC8h 40m
2026-07-06 UAL947 AMS → IAD Jul 6, 09:50 UTCJul 6, 18:07 UTC8h 17m
2026-07-05 UAL20 - Jul 5, 22:15 UTCJul 6, 07:20 UTC9h 5m
2026-07-05 UAL855 - Jul 5, 06:20 UTCJul 5, 12:25 UTC6h 5m
2026-07-05 UAL854 - Jul 5, 02:50 UTCJul 5, 03:25 UTC35m
2026-07-04 UAL854 - Jul 4, 21:50 UTCJul 5, 00:10 UTC2h 20m
2026-07-04 UAL854 IAH → LIM Jul 4, 21:57 UTCJul 5, 03:42 UTC5h 45m
2026-07-04 UAL3014 - Jul 4, 01:40 UTCJul 4, 04:10 UTC2h 30m
2026-07-01 UAL53 ZRH → IAD Jul 1, 10:35 UTCJul 1, 19:40 UTC9h 5m
2026-06-30 UAL52 IAD → ZRH Jun 30, 22:03 UTCJul 1, 05:45 UTC7h 42m
2026-06-30 UAL52 IAD → ZRH Jun 30, 22:05 UTCJul 1, 05:50 UTC7h 45m
2026-06-30 UAL3902 TPA → ORD Jun 30, 18:30 UTCJun 30, 19:15 UTC45m
2026-06-30 UAL957 GVA → EWR Jun 30, 08:30 UTCJun 30, 16:40 UTC8h 10m
2026-06-29 UAL748 - Jun 29, 21:39 UTCJun 30, 05:05 UTC7h 26m
2026-06-29 UAL53 ZRH → IAD Jun 29, 10:29 UTCJun 29, 19:24 UTC8h 55m
2026-06-28 UAL52 IAD → ZRH Jun 28, 22:03 UTCJun 29, 05:55 UTC7h 52m
2026-06-28 UAL52 - Jun 28, 22:04 UTCJun 29, 00:00 UTC1h 55m
2026-06-28 UAL322 - Jun 28, 08:14 UTCJun 28, 17:30 UTC9h 15m
2026-06-28 UAL322 VCE → IAD Jun 28, 08:04 UTCJun 28, 17:29 UTC9h 25m
2026-06-27 UAL321 IAD → VCE Jun 27, 21:50 UTCJun 28, 05:45 UTC7h 55m
2026-06-26 UAL243 NCE → IAD Jun 26, 13:44 UTCJun 26, 22:19 UTC8h 35m
2026-06-26 UAL243 NCE → IAD Jun 26, 13:34 UTCJun 26, 22:14 UTC8h 40m
2026-06-26 UAL242 - Jun 26, 03:20 UTCJun 26, 11:09 UTC7h 50m
2026-06-25 UAL749 - Jun 25, 09:14 UTCJun 25, 18:00 UTC8h 45m
2026-06-24 UAL748 IAD → GVA Jun 24, 21:43 UTCJun 25, 05:02 UTC7h 19m
2026-06-24 UAL748 IAD → GVA Jun 24, 21:40 UTCJun 25, 05:05 UTC7h 25m
2026-06-24 UAL243 NCE → IAD Jun 24, 08:24 UTCJun 24, 17:07 UTC8h 43m
2026-06-24 UAL243 NCE → IAD Jun 24, 08:09 UTCJun 24, 17:14 UTC9h 5m
2026-06-23 UAL242 IAD → NCE Jun 23, 21:48 UTCJun 24, 05:30 UTC7h 42m
2026-06-23 UAL242 IAD → NCE Jun 23, 21:45 UTCJun 24, 05:24 UTC7h 40m
2026-06-23 UAL749 - Jun 23, 09:29 UTCJun 23, 16:59 UTC7h 30m
2026-06-23 UAL749 GVA → IAD Jun 23, 09:17 UTCJun 23, 18:42 UTC9h 25m
2026-06-22 UAL748 IAD → GVA Jun 22, 22:49 UTCJun 23, 06:19 UTC7h 30m
2026-06-22 UAL947 - Jun 22, 10:00 UTCJun 22, 17:55 UTC7h 55m
2026-06-21 UAL20 - Jun 21, 22:10 UTCJun 22, 07:10 UTC9h 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 N642UA page for operator, model, and routing details .

Mode-S A86E6C frequently asked

What is Mode-S code A86E6C?
A86E6C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N642UA.
Where is Mode-S A86E6C registered?
Mode-S code A86E6C 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 A86E6C 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 A86E6C, octal 52067154, decimal 11,038,316.
What flights does A86E6C operate?
Mode-S A86E6C has broadcast 20 distinct callsigns, including UAL128, UAL947, UAL946, UAL20, UAL243.