Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2CB33

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27965 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC

Hex
A2CB33
Octal
50545463
Decimal
10,668,851
Country
US
Tail
N27965
Type
B789
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
160
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A2CB33.

Country allocation

The ICAO 24-bit address A2CB33 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 - 8 2026-07-04
UAL821 - 7 2026-07-04
UAL188 United Airlines 7 2026-07-01
UAL893 United Airlines 6 2026-07-18
UAL863 United Airlines 6 2026-07-21
UAL29 United Airlines 6 2026-05-07
UAL187 - 6 2026-07-01
UAL2303 United Airlines 5 2026-05-30
UAL123 United Airlines 5 2026-07-26
UAL949 - 4 2026-07-14
UAL948 - 4 2026-07-14
UAL892 United Airlines 4 2026-07-19
UAL870 United Airlines 4 2026-07-22
UAL353 - 4 2026-07-03
UAL28 United Airlines 4 2026-05-08
UAL2679 United Airlines 4 2026-04-13
UAL2096 United Airlines 4 2026-06-14
UAL152 United Airlines 4 2026-06-10
UAL114 United Airlines 4 2026-05-16
UAL923 - 3 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1227 PHX → IAD Jul 26, 17:50 UTCJul 26, 22:45 UTC4h 55m
2026-07-26 UAL123 ANC → ORD Jul 26, 06:55 UTCJul 26, 14:05 UTC7h 10m
2026-07-26 UAL123 ANC → ORD Jul 26, 07:02 UTCJul 26, 14:03 UTC7h 1m
2026-07-25 UAL122 IAD → LHR Jul 25, 14:15 UTCJul 25, 20:15 UTC6h 0m
2026-07-24 UAL1855 ORD → BOS Jul 24, 20:35 UTCJul 25, 01:05 UTC4h 30m
2026-07-24 UAL2692 IAD → PHL Jul 24, 14:42 UTCJul 24, 18:56 UTC4h 14m
2026-07-24 UAL2692 IAD → PHL Jul 24, 14:15 UTCJul 24, 18:55 UTC4h 40m
2026-07-23 UAL83 DEL → EWR Jul 23, 19:55 UTCJul 24, 05:45 UTC9h 50m
2026-07-23 UAL83 DEL → EWR Jul 23, 19:35 UTCJul 24, 11:20 UTC15h 45m
2026-07-23 UAL82 EWR → DEL Jul 23, 01:44 UTCJul 23, 15:40 UTC13h 56m
2026-07-23 UAL82 EWR → DEL Jul 23, 01:50 UTCJul 23, 15:45 UTC13h 55m
2026-07-22 UAL713 ORD → DEL Jul 22, 18:20 UTCJul 22, 22:45 UTC4h 25m
2026-07-22 UAL870 SYD → SFO Jul 22, 00:35 UTCJul 22, 13:30 UTC12h 55m
2026-07-21 UAL863 SFO → SYD Jul 21, 08:01 UTCJul 21, 21:55 UTC13h 54m
2026-07-21 UAL863 SFO → SYD Jul 21, 07:50 UTCJul 21, 22:10 UTC14h 20m
2026-07-20 UAL969 AMS → SFO Jul 20, 13:16 UTCJul 20, 23:38 UTC10h 22m
2026-07-20 UAL969 AMS → SFO Jul 20, 13:15 UTCJul 20, 23:45 UTC10h 30m
2026-07-19 UAL968 SFO → AMS Jul 19, 22:23 UTCJul 20, 07:41 UTC9h 18m
2026-07-19 UAL968 SFO → AMS Jul 19, 22:20 UTCJul 20, 07:50 UTC9h 30m
2026-07-19 UAL892 ICN → SFO Jul 19, 08:00 UTCJul 19, 18:25 UTC10h 25m
2026-07-18 UAL893 SFO → ICN Jul 18, 18:30 UTCJul 19, 05:49 UTC11h 19m
2026-07-18 UAL893 SFO → ICN Jul 18, 18:55 UTCJul 19, 04:45 UTC9h 50m
2026-07-14 UAL949 - Jul 14, 12:40 UTCJul 14, 23:05 UTC10h 24m
2026-07-14 UAL948 SFO → LHR Jul 14, 00:14 UTCJul 14, 09:54 UTC9h 40m
2026-07-14 UAL948 SFO → LHR Jul 14, 00:30 UTCJul 14, 10:05 UTC9h 35m
2026-07-12 UAL949 LHR → SFO Jul 12, 12:25 UTCJul 12, 23:27 UTC11h 2m
2026-07-12 UAL949 - Jul 12, 13:05 UTCJul 12, 23:30 UTC10h 25m
2026-07-12 UAL948 SFO → LHR Jul 12, 00:34 UTCJul 12, 10:01 UTC9h 27m
2026-07-12 UAL948 SFO → LHR Jul 12, 00:35 UTCJul 12, 10:05 UTC9h 30m
2026-07-10 UAL949 - Jul 10, 12:40 UTCJul 10, 23:05 UTC10h 25m
2026-07-09 UAL923 - Jul 9, 22:55 UTCJul 10, 08:45 UTC9h 50m
2026-07-09 UAL923 LAX → LHR Jul 9, 22:53 UTCJul 10, 08:47 UTC9h 54m
2026-07-09 UAL2692 - Jul 9, 14:05 UTCJul 9, 18:45 UTC4h 40m
2026-07-06 UAL1855 - Jul 6, 21:25 UTCJul 7, 02:10 UTC4h 45m
2026-07-06 UAL772 - Jul 6, 05:20 UTCJul 6, 15:50 UTC10h 30m
2026-07-06 UAL772 PEK → LAX Jul 6, 04:29 UTCJul 6, 15:53 UTC11h 24m
2026-07-05 UAL771 - Jul 5, 07:25 UTCJul 5, 08:20 UTC55m
2026-07-05 UAL771 LAX → PEK Jul 5, 07:09 UTCJul 5, 20:52 UTC13h 43m
2026-07-04 UAL821 HKG → LAX Jul 4, 14:06 UTCJul 5, 03:08 UTC13h 2m
2026-07-04 UAL821 - Jul 4, 14:25 UTCJul 5, 03:10 UTC12h 45m
2026-07-04 UAL821 - Jul 4, 09:05 UTCJul 4, 09:35 UTC30m
2026-07-04 UAL821 BKK → HKG Jul 4, 09:05 UTCJul 4, 11:35 UTC2h 30m
2026-07-04 UAL820 - Jul 4, 04:20 UTCJul 4, 04:30 UTC10m
2026-07-04 UAL820 - Jul 4, 01:40 UTCJul 4, 02:00 UTC20m
2026-07-04 UAL820 HKG → BKK Jul 4, 00:51 UTCJul 4, 04:15 UTC3h 24m
2026-07-03 UAL820 - Jul 3, 09:15 UTCJul 3, 22:55 UTC13h 40m
2026-07-03 UAL353 EWR → LAX Jul 3, 01:49 UTCJul 3, 07:00 UTC5h 11m
2026-07-03 UAL353 - Jul 3, 02:05 UTCJul 3, 07:05 UTC5h 0m
2026-07-01 UAL187 - Jul 1, 20:15 UTCJul 2, 11:20 UTC15h 5m
2026-07-01 UAL188 EWR → JNB Jul 1, 01:54 UTCJul 1, 15:34 UTC13h 40m

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 N27965 page for operator, model, and routing details .

Mode-S A2CB33 frequently asked

What is Mode-S code A2CB33?
A2CB33 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27965.
Where is Mode-S A2CB33 registered?
Mode-S code A2CB33 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 A2CB33 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2CB33, octal 50545463, decimal 10,668,851.
What flights does A2CB33 operate?
Mode-S A2CB33 has broadcast 20 distinct callsigns, including UAL820, UAL821, UAL188, UAL893, UAL863.