Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A13DE2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17963 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC

Hex
A13DE2
Octal
50236742
Decimal
10,567,138
Country
US
Tail
N17963
Type
B789
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
219
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A13DE2.

Country allocation

The ICAO 24-bit address A13DE2 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
UAL820 United Airlines 19 2026-06-10
UAL821 United Airlines 16 2026-06-10
UAL2023 - 12 2026-07-10
UAL1757 United Airlines 10 2026-07-20
UAL1011 - 10 2026-07-10
UAL893 United Airlines 8 2026-07-22
UAL892 United Airlines 8 2026-07-23
UAL1849 United Airlines 8 2026-07-20
UAL60 United Airlines 6 2026-07-26
UAL968 United Airlines 5 2026-07-23
UAL870 - 4 2026-06-27
UAL863 - 4 2026-06-26
UAL805 - 4 2026-07-21
UAL62 United Airlines 4 2026-05-20
UAL61 - 4 2026-06-17
UAL353 United Airlines 4 2026-06-08
UAL2096 United Airlines 4 2026-06-08
UAL187 United Airlines 4 2026-05-27
UAL969 United Airlines 3 2026-07-24
UAL842 United Airlines 3 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL60 SFO → MEL Jul 26, 06:50 UTCJul 26, 22:30 UTC15h 40m
2026-07-25 UAL949 LHR → SFO Jul 25, 13:50 UTCJul 26, 00:15 UTC10h 25m
2026-07-25 UAL948 SFO → LHR Jul 25, 02:10 UTCJul 25, 11:30 UTC9h 20m
2026-07-24 UAL969 AMS → SFO Jul 24, 13:10 UTCJul 24, 23:55 UTC10h 45m
2026-07-23 UAL968 SFO → AMS Jul 23, 22:40 UTCJul 24, 08:05 UTC9h 25m
2026-07-23 UAL892 ICN → SFO Jul 23, 08:16 UTCJul 23, 18:34 UTC10h 18m
2026-07-23 UAL892 ICN → SFO Jul 23, 08:05 UTCJul 23, 18:40 UTC10h 35m
2026-07-22 UAL893 SFO → ICN Jul 22, 18:10 UTCJul 23, 05:20 UTC11h 10m
2026-07-22 UAL806 ICN → SFO Jul 22, 03:10 UTCJul 22, 13:30 UTC10h 20m
2026-07-21 UAL805 SFO → ICN Jul 21, 07:30 UTCJul 21, 18:45 UTC11h 15m
2026-07-20 UAL1757 PIT → DEN Jul 20, 23:15 UTCJul 21, 04:00 UTC4h 44m
2026-07-20 UAL1849 MCO → EWR Jul 20, 15:35 UTCJul 20, 20:00 UTC4h 25m
2026-07-19 UAL969 AMS → SFO Jul 19, 13:20 UTCJul 19, 23:50 UTC10h 30m
2026-07-18 UAL968 SFO → AMS Jul 18, 22:48 UTCJul 19, 07:55 UTC9h 7m
2026-07-18 UAL968 SFO → AMS Jul 18, 22:40 UTCJul 19, 08:05 UTC9h 25m
2026-07-18 UAL892 - Jul 18, 08:00 UTCJul 18, 18:50 UTC10h 50m
2026-07-17 UAL893 SFO → ICN Jul 17, 18:34 UTCJul 18, 05:40 UTC11h 6m
2026-07-17 UAL806 ICN → SFO Jul 17, 02:45 UTCJul 17, 13:25 UTC10h 40m
2026-07-16 UAL805 - Jul 16, 07:50 UTCJul 16, 19:05 UTC11h 15m
2026-07-15 UAL969 - Jul 15, 13:15 UTCJul 15, 23:45 UTC10h 30m
2026-07-14 UAL968 SFO → AMS Jul 14, 22:23 UTCJul 15, 08:24 UTC10h 1m
2026-07-14 UAL968 SFO → AMS Jul 14, 22:50 UTCJul 15, 08:35 UTC9h 45m
2026-07-14 UAL892 - Jul 14, 08:10 UTCJul 14, 18:55 UTC10h 45m
2026-07-13 UAL893 SFO → ICN Jul 13, 18:10 UTCJul 14, 05:30 UTC11h 20m
2026-07-13 UAL806 - Jul 13, 02:45 UTCJul 13, 13:05 UTC10h 20m
2026-07-12 UAL805 SFO → ICN Jul 12, 07:37 UTCJul 12, 18:57 UTC11h 20m
2026-07-12 UAL805 SFO → ICN Jul 12, 07:40 UTCJul 12, 19:05 UTC11h 25m
2026-07-11 UAL1757 - Jul 11, 22:25 UTCJul 12, 03:10 UTC4h 45m
2026-07-10 UAL2023 CPT → IAD Jul 10, 18:21 UTCJul 11, 08:49 UTC14h 28m
2026-07-10 UAL2023 CPT → IAD Jul 10, 18:15 UTCJul 11, 08:50 UTC14h 35m
2026-07-10 UAL1011 - Jul 10, 14:30 UTCJul 10, 14:45 UTC15m
2026-07-10 UAL1011 - Jul 10, 00:45 UTCJul 10, 01:35 UTC50m
2026-07-09 UAL344 - Jul 9, 02:35 UTCJul 9, 11:20 UTC8h 45m
2026-07-08 UAL345 - Jul 8, 13:30 UTCJul 8, 22:55 UTC9h 25m
2026-07-08 UAL344 - Jul 8, 01:45 UTCJul 8, 10:10 UTC8h 25m
2026-07-07 UAL345 - Jul 7, 21:55 UTCJul 7, 22:10 UTC15m
2026-07-07 UAL345 - Jul 7, 12:55 UTCJul 7, 18:05 UTC5h 10m
2026-07-06 UAL2023 - Jul 6, 14:35 UTCJul 7, 05:50 UTC15h 15m
2026-07-06 UAL2023 CPT → IAD Jul 6, 14:36 UTCJul 7, 05:47 UTC15h 11m
2026-07-05 UAL1011 IAD → CPT Jul 5, 16:36 UTCJul 6, 06:39 UTC14h 3m
2026-07-05 UAL1011 - Jul 5, 16:35 UTCJul 5, 17:20 UTC45m
2026-07-04 UAL1849 MCO → EWR Jul 4, 15:35 UTCJul 4, 20:15 UTC4h 40m
2026-07-02 UAL1757 - Jul 2, 23:30 UTCJul 3, 04:25 UTC4h 55m
2026-06-30 UAL2023 CPT → IAD Jun 30, 18:51 UTCJul 1, 09:28 UTC14h 37m
2026-06-30 UAL2023 - Jun 30, 18:15 UTCJun 30, 18:25 UTC10m
2026-06-30 UAL1011 IAD → CPT Jun 30, 01:31 UTCJun 30, 14:48 UTC13h 17m
2026-06-30 UAL1011 - Jun 30, 01:30 UTCJun 30, 14:30 UTC13h 0m
2026-06-28 UAL2023 CPT → IAD Jun 28, 19:06 UTCJun 29, 10:06 UTC15h 0m
2026-06-28 UAL2023 CPT → IAD Jun 28, 19:04 UTCJun 29, 10:00 UTC14h 55m
2026-06-27 UAL1011 IAD → CPT Jun 27, 23:06 UTCJun 28, 12:39 UTC13h 33m

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 N17963 page for operator, model, and routing details .

Mode-S A13DE2 frequently asked

What is Mode-S code A13DE2?
A13DE2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17963.
Where is Mode-S A13DE2 registered?
Mode-S code A13DE2 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 A13DE2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13DE2, octal 50236742, decimal 10,567,138.
What flights does A13DE2 operate?
Mode-S A13DE2 has broadcast 20 distinct callsigns, including UAL820, UAL821, UAL2023, UAL1757, UAL1011.