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
Broadcasting now · callsign UAL820 · 33,175 ft
Flights observed
93
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A13DE2 is currently broadcasting. Map zoomed to live position.

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 6 2026-05-30
UAL1757 United Airlines 5 2026-04-18
UAL62 United Airlines 4 2026-05-20
UAL2023 United Airlines 4 2026-04-21
UAL187 United Airlines 4 2026-05-27
UAL1849 United Airlines 4 2026-04-20
UAL893 United Airlines 3 2026-04-16
UAL892 United Airlines 3 2026-04-16
UAL821 United Airlines 3 2026-05-14
UAL79 United Airlines 3 2026-05-18
UAL772 United Airlines 3 2026-04-30
UAL63 United Airlines 3 2026-05-21
UAL60 - 3 2026-04-14
UAL32 United Airlines 3 2026-05-15
UAL935 United Airlines 2 2026-05-12
UAL61 United Airlines 2 2026-04-15
UAL6 United Airlines 2 2026-05-19
UAL27 United Airlines 2 2026-05-09
UAL188 United Airlines 2 2026-05-27
UAL1855 United Airlines 2 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 UAL820 MEX → SFO May 30, 01:00 UTCMay 30, 01:15 UTC15m
2026-05-29 UAL820 MEX → SFO May 29, 07:40 UTCMay 29, 22:40 UTC15h 0m
2026-05-28 UAL353 SAN → EWR May 28, 23:55 UTCMay 29, 04:55 UTC5h 0m
2026-05-27 UAL187 JNB → EWR May 27, 20:05 UTCMay 27, 20:30 UTC25m
2026-05-27 UAL187 JNB → EWR May 27, 20:19 UTCMay 28, 11:39 UTC15h 20m
2026-05-27 UAL188 EWR → JNB May 27, 01:39 UTCMay 27, 15:55 UTC14h 16m
2026-05-25 UAL2222 IAD → CPT May 25, 18:05 UTCMay 26, 09:04 UTC14h 59m
2026-05-25 UAL1122 EWR → CPT May 25, 14:15 UTCMay 25, 14:40 UTC25m
2026-05-24 UAL2096 LAX → EWR May 24, 16:05 UTCMay 24, 20:40 UTC4h 35m
2026-05-23 UAL3935 LHR → LAX May 23, 16:45 UTCMay 23, 19:30 UTC2h 45m
2026-05-21 UAL63 GRU → IAH May 21, 01:15 UTCMay 21, 08:30 UTC7h 15m
2026-05-21 UAL63 GRU → IAH May 21, 01:11 UTCMay 21, 10:24 UTC9h 13m
2026-05-20 UAL62 IAH → GRU May 20, 00:15 UTCMay 20, 09:05 UTC8h 51m
2026-05-19 UAL6 NRT → IAH May 19, 08:10 UTCMay 19, 19:30 UTC11h 20m
2026-05-18 UAL79 EWR → NRT May 18, 15:40 UTCMay 19, 05:25 UTC13h 44m
2026-05-17 UAL187 JNB → EWR May 17, 20:10 UTCMay 17, 23:25 UTC3h 15m
2026-05-17 UAL187 JNB → EWR May 17, 20:19 UTCMay 18, 11:37 UTC15h 18m
2026-05-17 UAL188 EWR → JNB May 17, 02:15 UTCMay 17, 16:15 UTC14h 1m
2026-05-16 UAL78 NRT → EWR May 16, 08:31 UTCMay 16, 20:40 UTC12h 10m
2026-05-15 UAL32 LAX → NRT May 15, 18:30 UTCMay 16, 05:40 UTC11h 10m
2026-05-14 UAL821 SFO → MEX May 14, 14:10 UTCMay 15, 03:15 UTC13h 5m
2026-05-14 UAL821 SFO → MEX May 14, 09:10 UTCMay 14, 09:45 UTC35m
2026-05-14 UAL821 SFO → MEX May 14, 09:05 UTCMay 14, 11:26 UTC2h 21m
2026-05-14 UAL820 MEX → SFO May 14, 02:05 UTCMay 14, 02:40 UTC35m
2026-05-14 UAL820 MEX → SFO May 14, 00:20 UTCMay 14, 00:35 UTC15m
2026-05-13 UAL820 MEX → SFO May 13, 06:34 UTCMay 13, 21:46 UTC15h 12m
2026-05-13 UAL820 MEX → SFO May 13, 06:45 UTCMay 13, 22:00 UTC15h 15m
2026-05-12 UAL935 LHR → LAX May 12, 12:50 UTCMay 12, 23:20 UTC10h 30m
2026-05-12 UAL923 LAX → LHR May 12, 07:35 UTCMay 12, 08:55 UTC1h 20m
2026-05-11 UAL2692 IAD → PHL May 11, 13:40 UTCMay 11, 18:40 UTC5h 1m
2026-05-10 UAL1855 ORD → BOS May 10, 20:35 UTCMay 11, 01:30 UTC4h 55m
2026-05-09 UAL935 LHR → LAX May 9, 12:20 UTCMay 9, 22:39 UTC10h 20m
2026-05-09 UAL27 DEN → LHR May 9, 08:25 UTCMay 9, 09:55 UTC1h 30m
2026-05-09 UAL27 DEN → LHR May 9, 01:15 UTCMay 9, 04:45 UTC3h 30m
2026-05-08 UAL263 EWR → PBI May 8, 14:25 UTCMay 8, 23:25 UTC9h 0m
2026-05-08 UAL262 DEN → LHR May 8, 02:35 UTCMay 8, 10:59 UTC8h 25m
2026-05-07 UAL178 KIX → GUM May 7, 12:40 UTCMay 7, 23:09 UTC10h 30m
2026-05-07 UAL178 KIX → GUM May 7, 12:47 UTCMay 7, 23:04 UTC10h 17m
2026-05-06 UAL177 GUM → KIX May 6, 23:50 UTCMay 7, 09:50 UTC10h 0m
2026-05-06 UAL181 FRA → DEN May 6, 09:45 UTCMay 6, 19:20 UTC9h 34m
2026-05-05 UAL182 DEN → FRA May 5, 21:55 UTCMay 6, 06:45 UTC8h 50m
2026-05-05 UAL142 NRT → DEN May 5, 07:45 UTCMay 5, 17:50 UTC10h 5m
2026-05-04 UAL7 IAH → NRT May 4, 15:35 UTCMay 5, 04:55 UTC13h 21m
2026-05-04 UAL63 GRU → IAH May 4, 01:15 UTCMay 4, 10:35 UTC9h 20m
2026-05-03 UAL62 IAH → GRU May 3, 01:55 UTCMay 3, 10:10 UTC8h 14m
2026-05-03 UAL62 IAH → GRU May 3, 00:55 UTCMay 3, 01:05 UTC10m
2026-05-03 UAL62 IAH → GRU May 3, 00:58 UTCMay 3, 10:07 UTC9h 9m
2026-05-02 UAL6 NRT → IAH May 2, 08:15 UTCMay 2, 19:45 UTC11h 30m
2026-05-01 UAL79 EWR → NRT May 1, 15:47 UTCMay 2, 05:15 UTC13h 28m
2026-05-01 UAL79 EWR → NRT May 1, 15:35 UTCMay 2, 05:05 UTC13h 30m

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?
Yes. Mode-S A13DE2 is currently airborne.
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, UAL1757, UAL62, UAL2023, UAL187.