Apparatus

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sensors Mode-S transponder

A2A3AF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N26960 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC

Hex
A2A3AF
Octal
50521657
Decimal
10,658,735
Country
US
Tail
N26960
Type
B789
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
201
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S A2A3AF.

Country allocation

The ICAO 24-bit address A2A3AF 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
UAL821 United Airlines 12 2026-05-11
UAL820 United Airlines 11 2026-05-10
UAL152 United Airlines 8 2026-07-05
UAL870 - 7 2026-07-09
UAL863 United Airlines 7 2026-07-20
UAL82 - 7 2026-04-13
UAL892 - 6 2026-06-28
UAL1849 United Airlines 6 2026-07-26
UAL153 United Airlines 6 2026-07-06
UAL114 - 6 2026-07-10
UAL893 - 5 2026-06-27
UAL805 - 5 2026-06-22
UAL29 - 5 2026-07-11
UAL28 - 5 2026-07-12
UAL2692 - 5 2026-07-16
UAL115 - 5 2026-07-09
UAL98 United Airlines 4 2026-05-12
UAL83 United Airlines 4 2026-04-14
UAL806 - 4 2026-06-23
UAL1757 United Airlines 4 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1849 MCO → EWR Jul 26, 15:40 UTCJul 26, 20:00 UTC4h 20m
2026-07-25 UAL1227 PHX → IAD Jul 25, 18:40 UTCJul 25, 23:55 UTC5h 15m
2026-07-25 UAL123 ANC → ORD Jul 25, 07:00 UTCJul 25, 13:50 UTC6h 50m
2026-07-24 UAL122 IAD → LHR Jul 24, 14:09 UTCJul 24, 19:41 UTC5h 32m
2026-07-24 UAL122 IAD → LHR Jul 24, 13:40 UTCJul 24, 19:45 UTC6h 5m
2026-07-23 UAL2222 IAD → CPT Jul 23, 19:05 UTCJul 24, 09:15 UTC14h 10m
2026-07-23 UAL2222 IAD → CPT Jul 23, 19:08 UTCJul 24, 09:11 UTC14h 3m
2026-07-23 UAL1122 EWR → CPT Jul 23, 02:40 UTCJul 23, 16:55 UTC14h 15m
2026-07-21 UAL2096 - Jul 21, 20:00 UTCJul 22, 00:40 UTC4h 40m
2026-07-20 UAL842 SYD → LAX Jul 20, 23:50 UTCJul 21, 13:20 UTC13h 30m
2026-07-20 UAL863 SFO → SYD Jul 20, 11:40 UTCJul 20, 21:20 UTC9h 40m
2026-07-20 UAL863 SFO → SYD Jul 20, 07:05 UTCJul 20, 07:30 UTC25m
2026-07-19 UAL1757 PIT → DEN Jul 19, 22:35 UTCJul 20, 03:20 UTC4h 45m
2026-07-19 UAL1849 MCO → EWR Jul 19, 15:40 UTCJul 19, 20:05 UTC4h 25m
2026-07-17 UAL949 - Jul 17, 12:19 UTCJul 17, 22:29 UTC10h 10m
2026-07-17 UAL949 LHR → SFO Jul 17, 12:25 UTCJul 17, 22:26 UTC10h 1m
2026-07-16 UAL923 LAX → LHR Jul 16, 22:59 UTCJul 17, 08:54 UTC9h 55m
2026-07-16 UAL2692 - Jul 16, 13:49 UTCJul 16, 18:29 UTC4h 40m
2026-07-15 UAL1855 LAX → EWR Jul 15, 21:25 UTCJul 16, 02:05 UTC4h 40m
2026-07-14 UAL353 - Jul 14, 23:05 UTCJul 15, 03:40 UTC4h 35m
2026-07-14 UAL2096 - Jul 14, 16:20 UTCJul 14, 21:05 UTC4h 45m
2026-07-14 UAL842 SYD → LAX Jul 14, 00:00 UTCJul 14, 13:20 UTC13h 20m
2026-07-13 UAL863 SFO → SYD Jul 13, 06:45 UTCJul 13, 20:39 UTC13h 54m
2026-07-13 UAL863 SFO → SYD Jul 13, 06:45 UTCJul 13, 20:45 UTC14h 0m
2026-07-12 UAL1757 - Jul 12, 22:25 UTCJul 13, 03:05 UTC4h 40m
2026-07-12 UAL1849 SFO → IAD Jul 12, 15:34 UTCJul 12, 19:55 UTC4h 21m
2026-07-12 UAL1849 SFO → IAD Jul 12, 15:25 UTCJul 12, 20:01 UTC4h 35m
2026-07-12 UAL28 - Jul 12, 04:25 UTCJul 12, 05:10 UTC45m
2026-07-11 UAL29 - Jul 11, 10:15 UTCJul 11, 10:25 UTC10m
2026-07-10 UAL29 - Jul 10, 18:40 UTCJul 11, 06:35 UTC11h 55m
2026-07-10 UAL114 PPT → SFO Jul 10, 07:53 UTCJul 10, 14:54 UTC7h 1m
2026-07-10 UAL114 - Jul 10, 07:30 UTCJul 10, 14:55 UTC7h 25m
2026-07-09 UAL115 SFO → PPT Jul 9, 22:00 UTCJul 10, 05:40 UTC7h 40m
2026-07-09 UAL870 SYD → SFO Jul 9, 00:45 UTCJul 9, 14:01 UTC13h 16m
2026-07-09 UAL870 - Jul 9, 00:55 UTCJul 9, 13:50 UTC12h 55m
2026-07-08 UAL863 SFO → SYD Jul 8, 06:49 UTCJul 8, 20:51 UTC14h 2m
2026-07-08 UAL863 - Jul 8, 06:45 UTCJul 8, 07:15 UTC30m
2026-07-07 UAL949 - Jul 7, 12:15 UTCJul 7, 22:40 UTC10h 25m
2026-07-06 UAL923 - Jul 6, 22:50 UTCJul 7, 09:05 UTC10h 15m
2026-07-06 UAL153 HKG → LAX Jul 6, 05:08 UTCJul 6, 17:44 UTC12h 36m
2026-07-06 UAL153 HKG → LAX Jul 6, 04:55 UTCJul 6, 17:50 UTC12h 55m
2026-07-06 UAL153 HKG → LAX Jul 6, 00:19 UTCJul 6, 02:24 UTC2h 5m
2026-07-05 UAL152 LAX → HKG Jul 5, 12:55 UTCJul 5, 13:10 UTC15m
2026-07-04 UAL152 LAX → HKG Jul 4, 20:18 UTCJul 5, 10:23 UTC14h 5m
2026-07-04 UAL152 LAX → HKG Jul 4, 20:30 UTCJul 5, 10:05 UTC13h 35m
2026-07-04 UAL33 - Jul 4, 08:10 UTCJul 4, 17:40 UTC9h 30m
2026-07-04 UAL33 NRT → LAX Jul 4, 08:05 UTCJul 4, 17:33 UTC9h 28m
2026-07-03 UAL7 - Jul 3, 15:50 UTCJul 4, 04:50 UTC13h 0m
2026-07-03 UAL63 - Jul 3, 01:20 UTCJul 3, 10:50 UTC9h 30m
2026-07-02 UAL62 - Jul 2, 01:15 UTCJul 2, 10:10 UTC8h 55m

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 N26960 page for operator, model, and routing details .

Mode-S A2A3AF frequently asked

What is Mode-S code A2A3AF?
A2A3AF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N26960.
Where is Mode-S A2A3AF registered?
Mode-S code A2A3AF 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 A2A3AF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2A3AF, octal 50521657, decimal 10,658,735.
What flights does A2A3AF operate?
Mode-S A2A3AF has broadcast 20 distinct callsigns, including UAL821, UAL820, UAL152, UAL870, UAL863.