Apparatus

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sensors Mode-S transponder

AA64BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N769UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AA64BA
Octal
52462272
Decimal
11,166,906
Country
US
Tail
N769UA
Type
B772
No current signal · last broadcast 2h ago
Flights observed
206
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AA64BA.

Country allocation

The ICAO 24-bit address AA64BA 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
UAL1170 - 24 2026-07-12
UAL253 - 22 2026-07-10
UAL300 - 18 2026-07-14
UAL1158 - 18 2026-07-06
UAL1169 - 16 2026-07-11
UAL604 - 14 2026-07-13
UAL252 - 14 2026-07-14
UAL1157 United Airlines 14 2026-07-04
UAL2358 - 11 2026-07-13
UAL1818 - 10 2026-07-12
UAL1806 United Airlines 6 2026-06-14
UAL1805 United Airlines 5 2026-06-14
UAL2480 - 4 2026-07-07
UAL1947 United Airlines 4 2026-05-17
UAL1340 United Airlines 3 2026-05-18
UAL3911 United Airlines 2 2026-05-02
UAL3880 United Airlines 2 2026-04-29
UAL384 United Airlines 2 2026-06-16
UAL2610 - 2 2026-07-08
UAL2475 United Airlines 2 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL252 - Jul 14, 06:35 UTCJul 14, 06:50 UTC15m
2026-07-14 UAL300 - Jul 14, 01:45 UTCJul 14, 02:05 UTC20m
2026-07-13 UAL300 SFO → HNL Jul 13, 21:22 UTCJul 14, 02:03 UTC4h 41m
2026-07-13 UAL300 - Jul 13, 21:25 UTCJul 13, 21:50 UTC25m
2026-07-13 UAL2358 - Jul 13, 15:45 UTCJul 13, 19:05 UTC3h 20m
2026-07-13 UAL604 - Jul 13, 08:05 UTCJul 13, 11:20 UTC3h 15m
2026-07-12 UAL1818 - Jul 12, 23:45 UTCJul 13, 04:15 UTC4h 30m
2026-07-12 UAL1170 - Jul 12, 01:40 UTCJul 12, 06:35 UTC4h 55m
2026-07-11 UAL1169 - Jul 11, 10:45 UTCJul 11, 15:40 UTC4h 55m
2026-07-10 UAL253 - Jul 10, 15:50 UTCJul 10, 18:40 UTC2h 50m
2026-07-10 UAL253 IAH → HNL Jul 10, 15:52 UTCJul 10, 23:30 UTC7h 38m
2026-07-10 UAL252 - Jul 10, 06:05 UTCJul 10, 13:10 UTC7h 5m
2026-07-10 UAL252 HNL → IAH Jul 10, 06:08 UTCJul 10, 13:10 UTC7h 2m
2026-07-09 UAL300 - Jul 9, 22:10 UTCJul 10, 03:00 UTC4h 50m
2026-07-09 UAL1147 IAD → SFO Jul 9, 13:00 UTCJul 9, 18:00 UTC5h 0m
2026-07-08 UAL1791 SFO → IAD Jul 8, 20:30 UTCJul 9, 00:50 UTC4h 20m
2026-07-08 UAL2610 - Jul 8, 14:30 UTCJul 8, 18:15 UTC3h 45m
2026-07-07 UAL2480 SFO → ORD Jul 7, 22:35 UTCJul 8, 02:00 UTC3h 25m
2026-07-07 UAL1818 - Jul 7, 03:35 UTCJul 7, 04:20 UTC45m
2026-07-06 UAL1818 - Jul 6, 23:40 UTCJul 6, 23:50 UTC10m
2026-07-06 UAL1818 HNL → SFO Jul 6, 23:45 UTCJul 7, 04:11 UTC4h 26m
2026-07-06 UAL1158 - Jul 6, 16:35 UTCJul 6, 21:35 UTC5h 0m
2026-07-06 UAL1169 HNL → LAX Jul 6, 07:55 UTCJul 6, 12:15 UTC4h 20m
2026-07-06 UAL1170 - Jul 6, 00:35 UTCJul 6, 01:05 UTC30m
2026-07-06 UAL1170 LAX → HNL Jul 6, 00:21 UTCJul 6, 05:48 UTC5h 27m
2026-07-04 UAL1157 BOS → IAD Jul 4, 23:10 UTCJul 5, 03:40 UTC4h 30m
2026-07-04 UAL300 - Jul 4, 02:05 UTCJul 4, 02:20 UTC15m
2026-07-03 UAL300 SFO → HNL Jul 3, 21:22 UTCJul 4, 02:20 UTC4h 58m
2026-07-03 UAL300 - Jul 3, 21:35 UTCJul 3, 22:00 UTC25m
2026-07-03 UAL1147 IAD → SFO Jul 3, 12:55 UTCJul 3, 17:50 UTC4h 55m
2026-07-02 UAL1791 SFO → IAD Jul 2, 20:55 UTCJul 3, 01:20 UTC4h 25m
2026-07-02 UAL2358 SAN → EWR Jul 2, 15:00 UTCJul 2, 18:25 UTC3h 25m
2026-07-02 UAL2358 SAN → EWR Jul 2, 15:08 UTCJul 2, 18:15 UTC3h 7m
2026-07-02 UAL604 DEN → SYR Jul 2, 09:10 UTCJul 2, 12:15 UTC3h 5m
2026-07-02 UAL1818 - Jul 2, 00:25 UTCJul 2, 04:50 UTC4h 25m
2026-07-01 UAL1158 - Jul 1, 17:00 UTCJul 1, 17:25 UTC25m
2026-07-01 UAL1158 LAX → HNL Jul 1, 16:41 UTCJul 1, 22:25 UTC5h 44m
2026-07-01 UAL1169 - Jul 1, 07:55 UTCJul 1, 12:40 UTC4h 45m
2026-07-01 UAL1170 - Jul 1, 00:15 UTCJul 1, 05:25 UTC5h 10m
2026-06-30 UAL1157 BOS → IAD Jun 30, 00:09 UTCJun 30, 04:50 UTC4h 41m
2026-06-29 UAL1158 - Jun 29, 21:34 UTCJun 29, 21:54 UTC20m
2026-06-29 UAL1158 - Jun 29, 16:35 UTCJun 29, 17:05 UTC30m
2026-06-29 UAL1169 HNL → LAX Jun 29, 08:14 UTCJun 29, 13:00 UTC4h 45m
2026-06-29 UAL1170 - Jun 29, 05:09 UTCJun 29, 05:24 UTC15m
2026-06-29 UAL1170 - Jun 29, 00:20 UTCJun 29, 00:54 UTC35m
2026-06-29 UAL1170 LAX → HNL Jun 29, 00:21 UTCJun 29, 05:18 UTC4h 57m
2026-06-27 UAL1157 BOS → IAD Jun 27, 23:19 UTCJun 28, 04:20 UTC5h 0m
2026-06-26 UAL253 - Jun 26, 15:34 UTCJun 26, 23:00 UTC7h 25m
2026-06-26 UAL252 - Jun 26, 06:04 UTCJun 26, 13:24 UTC7h 20m
2026-06-25 UAL300 - Jun 25, 21:40 UTCJun 25, 22:10 UTC30m

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 N769UA page for operator, model, and routing details .

Mode-S AA64BA frequently asked

What is Mode-S code AA64BA?
AA64BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N769UA.
Where is Mode-S AA64BA registered?
Mode-S code AA64BA 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 AA64BA broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA64BA, octal 52462272, decimal 11,166,906.
What flights does AA64BA operate?
Mode-S AA64BA has broadcast 20 distinct callsigns, including UAL1170, UAL253, UAL300, UAL1158, UAL1169.