Apparatus

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sensors Mode-S transponder

A2CB32

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27964 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC

Hex
A2CB32
Octal
50545462
Decimal
10,668,850
Country
US
Tail
N27964
Type
B789
No current signal · last broadcast Jul 26, 22:20 UTC
Flights observed
245
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Last known position

Most recent position reported by Mode-S A2CB32.

Country allocation

The ICAO 24-bit address A2CB32 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
UAL152 United Airlines 18 2026-07-25
UAL263 United Airlines 16 2026-07-21
UAL262 United Airlines 15 2026-07-21
UAL153 United Airlines 15 2026-07-26
UAL761 - 14 2026-07-22
UAL820 United Airlines 13 2026-04-22
UAL177 - 10 2026-07-15
UAL760 United Airlines 9 2026-07-22
UAL28 United Airlines 9 2026-05-18
UAL178 - 8 2026-07-15
UAL83 United Airlines 7 2026-04-13
UAL29 United Airlines 7 2026-05-18
UAL198 United Airlines 7 2026-07-26
UAL142 United Airlines 7 2026-07-06
UAL182 United Airlines 6 2026-07-06
UAL143 United Airlines 6 2026-07-23
UAL821 United Airlines 5 2026-04-22
UAL181 - 5 2026-07-07
UAL839 United Airlines 4 2026-05-23
UAL60 United Airlines 4 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL198 LAX → PVG Jul 26, 20:40 UTCJul 26, 22:20 UTC1h 40m
2026-07-26 UAL153 HKG → LAX Jul 26, 05:05 UTCJul 26, 17:50 UTC12h 46m
2026-07-26 UAL153 HKG → LAX Jul 26, 02:15 UTCJul 26, 02:30 UTC15m
2026-07-25 UAL152 LAX → HKG Jul 25, 13:35 UTCJul 25, 13:40 UTC5m
2026-07-25 UAL152 LAX → HKG Jul 25, 11:00 UTCJul 25, 11:15 UTC15m
2026-07-24 UAL152 LAX → HKG Jul 24, 20:25 UTCJul 25, 07:30 UTC11h 5m
2026-07-24 UAL33 NRT → LAX Jul 24, 08:10 UTCJul 24, 18:05 UTC9h 55m
2026-07-23 UAL143 DEN → NRT Jul 23, 18:00 UTCJul 24, 05:00 UTC11h 0m
2026-07-22 UAL761 - Jul 22, 14:40 UTCJul 22, 18:05 UTC3h 25m
2026-07-22 UAL761 MUC → DEN Jul 22, 14:32 UTCJul 23, 00:55 UTC10h 23m
2026-07-22 UAL760 DEN → MUC Jul 22, 02:45 UTCJul 22, 12:05 UTC9h 20m
2026-07-21 UAL263 EWR → PBI Jul 21, 14:30 UTCJul 21, 23:25 UTC8h 55m
2026-07-21 UAL262 DEN → LHR Jul 21, 02:45 UTCJul 21, 11:20 UTC8h 35m
2026-07-20 UAL263 EWR → PBI Jul 20, 14:35 UTCJul 20, 23:40 UTC9h 5m
2026-07-20 UAL263 EWR → PBI Jul 20, 14:14 UTCJul 20, 23:36 UTC9h 22m
2026-07-20 UAL262 DEN → LHR Jul 20, 03:15 UTCJul 20, 12:00 UTC8h 45m
2026-07-18 UAL761 - Jul 18, 14:45 UTCJul 18, 17:00 UTC2h 15m
2026-07-18 UAL761 MUC → DEN Jul 18, 14:36 UTCJul 19, 00:38 UTC10h 2m
2026-07-18 UAL760 - Jul 18, 02:50 UTCJul 18, 12:10 UTC9h 20m
2026-07-17 UAL263 - Jul 17, 14:24 UTCJul 17, 23:20 UTC8h 55m
2026-07-17 UAL263 LHR → DEN Jul 17, 14:14 UTCJul 17, 23:15 UTC9h 1m
2026-07-17 UAL262 DEN → LHR Jul 17, 02:50 UTCJul 17, 11:30 UTC8h 40m
2026-07-16 UAL263 - Jul 16, 14:25 UTCJul 16, 23:15 UTC8h 50m
2026-07-16 UAL262 DEN → LHR Jul 16, 02:55 UTCJul 16, 11:05 UTC8h 10m
2026-07-16 UAL262 - Jul 16, 02:50 UTCJul 16, 10:29 UTC7h 40m
2026-07-15 UAL178 - Jul 15, 12:45 UTCJul 15, 23:20 UTC10h 35m
2026-07-15 UAL177 DEN → FCO Jul 15, 00:15 UTCJul 15, 10:15 UTC10h 0m
2026-07-12 UAL178 - Jul 12, 17:35 UTCJul 13, 03:50 UTC10h 15m
2026-07-12 UAL177 DEN → FCO Jul 12, 05:53 UTCJul 12, 15:33 UTC9h 40m
2026-07-12 UAL177 - Jul 12, 05:55 UTCJul 12, 07:55 UTC2h 0m
2026-07-11 UAL263 LHR → DEN Jul 11, 16:54 UTCJul 12, 02:03 UTC9h 9m
2026-07-11 UAL263 LHR → DEN Jul 11, 17:05 UTCJul 12, 02:05 UTC9h 0m
2026-07-11 UAL262 DEN → LHR Jul 11, 03:35 UTCJul 11, 12:05 UTC8h 30m
2026-07-10 UAL761 MUC → DEN Jul 10, 14:35 UTCJul 11, 01:25 UTC10h 50m
2026-07-10 UAL761 MUC → DEN Jul 10, 14:31 UTCJul 11, 01:22 UTC10h 51m
2026-07-10 UAL760 DEN → MUC Jul 10, 02:55 UTCJul 10, 12:10 UTC9h 15m
2026-07-09 UAL263 - Jul 9, 14:35 UTCJul 9, 23:30 UTC8h 55m
2026-07-09 UAL263 LHR → DEN Jul 9, 14:24 UTCJul 9, 23:37 UTC9h 13m
2026-07-09 UAL262 DEN → LHR Jul 9, 02:55 UTCJul 9, 12:15 UTC9h 20m
2026-07-09 UAL262 - Jul 9, 03:50 UTCJul 9, 05:45 UTC1h 55m
2026-07-08 UAL178 - Jul 8, 12:55 UTCJul 8, 23:35 UTC10h 40m
2026-07-08 UAL177 DEN → FCO Jul 8, 00:05 UTCJul 8, 10:25 UTC10h 20m
2026-07-07 UAL181 - Jul 7, 09:50 UTCJul 7, 10:30 UTC40m
2026-07-07 UAL181 FRA → DEN Jul 7, 09:46 UTCJul 7, 19:25 UTC9h 39m
2026-07-06 UAL182 DEN → FRA Jul 6, 22:25 UTCJul 7, 07:25 UTC9h 0m
2026-07-06 UAL142 NRT → DEN Jul 6, 07:45 UTCJul 6, 17:40 UTC9h 55m
2026-07-06 UAL142 NRT → DEN Jul 6, 07:50 UTCJul 6, 17:38 UTC9h 48m
2026-07-05 UAL143 DEN → NRT Jul 5, 18:05 UTCJul 6, 05:10 UTC11h 5m
2026-07-04 UAL761 MUC → DEN Jul 4, 14:40 UTCJul 5, 00:40 UTC10h 0m
2026-07-04 UAL761 MUC → DEN Jul 4, 14:31 UTCJul 5, 00:36 UTC10h 5m

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 N27964 page for operator, model, and routing details .

Mode-S A2CB32 frequently asked

What is Mode-S code A2CB32?
A2CB32 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27964.
Where is Mode-S A2CB32 registered?
Mode-S code A2CB32 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 A2CB32 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2CB32, octal 50545462, decimal 10,668,850.
What flights does A2CB32 operate?
Mode-S A2CB32 has broadcast 20 distinct callsigns, including UAL152, UAL263, UAL262, UAL153, UAL761.