Apparatus

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sensors Mode-S transponder

AA79A6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N774UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
AA79A6
Octal
52474646
Decimal
11,172,262
Country
US
Tail
N774UA
Type
B772
No current signal · last broadcast 8h ago
Flights observed
234
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S AA79A6.

Country allocation

The ICAO 24-bit address AA79A6 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
UAL300 - 24 2026-06-29
UAL252 - 20 2026-06-15
UAL1158 - 19 2026-07-02
UAL253 - 18 2026-06-19
UAL1170 - 18 2026-07-02
UAL2358 - 14 2026-07-12
UAL1157 United Airlines 14 2026-06-30
UAL1169 - 13 2026-07-02
UAL604 - 10 2026-07-12
UAL2610 - 10 2026-07-13
UAL1818 - 8 2026-07-03
UAL2480 - 7 2026-07-12
UAL1147 - 7 2026-07-10
UAL1777 - 5 2026-06-24
UAL543 - 4 2026-06-24
UAL368 - 3 2026-06-23
UAL2278 United Airlines 3 2026-05-08
UAL1806 United Airlines 3 2026-05-27
UAL1141 United Airlines 3 2026-04-27
UAL384 United Airlines 2 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL8223 SFO → IAD Jul 13, 20:40 UTCJul 14, 01:15 UTC4h 35m
2026-07-13 UAL2610 - Jul 13, 14:50 UTCJul 13, 18:25 UTC3h 35m
2026-07-12 UAL2480 SFO → ORD Jul 12, 22:40 UTCJul 13, 02:20 UTC3h 40m
2026-07-12 UAL2358 - Jul 12, 16:20 UTCJul 12, 19:25 UTC3h 5m
2026-07-12 UAL604 - Jul 12, 08:05 UTCJul 12, 11:20 UTC3h 15m
2026-07-10 UAL1147 IAD → SFO Jul 10, 12:55 UTCJul 10, 18:00 UTC5h 5m
2026-07-09 UAL8112 SFO → IAD Jul 9, 20:55 UTCJul 10, 01:20 UTC4h 25m
2026-07-08 UAL1147 - Jul 8, 12:50 UTCJul 8, 17:45 UTC4h 55m
2026-07-07 UAL8291 SFO → IAD Jul 7, 20:50 UTCJul 8, 01:10 UTC4h 20m
2026-07-07 UAL2610 ORD → SFO Jul 7, 14:20 UTCJul 7, 18:25 UTC4h 5m
2026-07-06 UAL2480 - Jul 6, 22:35 UTCJul 7, 02:05 UTC3h 30m
2026-07-06 UAL2610 - Jul 6, 14:25 UTCJul 6, 18:10 UTC3h 45m
2026-07-06 UAL2610 ORD → SFO Jul 6, 14:21 UTCJul 6, 18:01 UTC3h 40m
2026-07-05 UAL2480 SFO → ORD Jul 5, 22:30 UTCJul 6, 02:00 UTC3h 30m
2026-07-05 UAL1147 - Jul 5, 14:15 UTCJul 5, 18:55 UTC4h 40m
2026-07-05 UAL1147 IAD → SFO Jul 5, 14:15 UTCJul 5, 18:41 UTC4h 26m
2026-07-04 UAL1791 SFO → IAD Jul 4, 20:40 UTCJul 5, 01:15 UTC4h 35m
2026-07-04 UAL1147 IAD → SFO Jul 4, 12:55 UTCJul 4, 17:29 UTC4h 34m
2026-07-04 UAL1147 - Jul 4, 12:50 UTCJul 4, 17:40 UTC4h 50m
2026-07-03 UAL1791 SFO → IAD Jul 3, 20:35 UTCJul 4, 01:05 UTC4h 30m
2026-07-03 UAL2358 SAN → EWR Jul 3, 14:55 UTCJul 3, 18:15 UTC3h 20m
2026-07-03 UAL604 DEN → SYR Jul 3, 08:35 UTCJul 3, 11:35 UTC3h 0m
2026-07-03 UAL1818 - Jul 3, 00:00 UTCJul 3, 04:25 UTC4h 25m
2026-07-03 UAL1818 HNL → SFO Jul 3, 00:00 UTCJul 3, 04:15 UTC4h 15m
2026-07-02 UAL1158 - Jul 2, 21:40 UTCJul 2, 21:55 UTC15m
2026-07-02 UAL1158 - Jul 2, 16:55 UTCJul 2, 17:25 UTC30m
2026-07-02 UAL1169 - Jul 2, 08:05 UTCJul 2, 12:45 UTC4h 40m
2026-07-02 UAL1170 - Jul 2, 00:35 UTCJul 2, 05:40 UTC5h 5m
2026-07-02 UAL1170 LAX → HNL Jul 2, 00:21 UTCJul 2, 05:39 UTC5h 18m
2026-06-30 UAL1157 BOS → IAD Jun 30, 23:20 UTCJul 1, 04:10 UTC4h 50m
2026-06-29 UAL300 SFO → HNL Jun 29, 21:22 UTCJun 30, 02:19 UTC4h 57m
2026-06-29 UAL300 - Jun 29, 21:34 UTCJun 30, 02:20 UTC4h 46m
2026-06-29 UAL1147 - Jun 29, 13:24 UTCJun 29, 18:25 UTC5h 0m
2026-06-28 UAL8191 PHL → YYZ Jun 28, 20:34 UTCJun 29, 01:00 UTC4h 25m
2026-06-28 UAL2610 ORD → SFO Jun 28, 14:30 UTCJun 28, 18:34 UTC4h 5m
2026-06-27 UAL2480 SFO → ORD Jun 27, 22:25 UTCJun 28, 01:50 UTC3h 25m
2026-06-27 UAL2358 SAN → EWR Jun 27, 15:00 UTCJun 27, 18:29 UTC3h 30m
2026-06-27 UAL604 DEN → SYR Jun 27, 08:39 UTCJun 27, 11:44 UTC3h 5m
2026-06-26 UAL3923 - Jun 26, 04:55 UTCJun 26, 09:00 UTC4h 5m
2026-06-25 UAL2480 SFO → ORD Jun 25, 22:29 UTCJun 26, 02:14 UTC3h 45m
2026-06-25 UAL2610 ORD → SFO Jun 25, 15:10 UTCJun 25, 19:09 UTC4h 0m
2026-06-24 UAL1777 SFO → ORD Jun 24, 22:37 UTCJun 25, 01:58 UTC3h 21m
2026-06-24 UAL1777 SFO → ORD Jun 24, 22:45 UTCJun 25, 02:14 UTC3h 30m
2026-06-24 UAL543 ORD → SFO Jun 24, 16:29 UTCJun 24, 20:35 UTC4h 5m
2026-06-23 UAL2475 MCO → ORD Jun 23, 17:25 UTCJun 23, 19:50 UTC2h 25m
2026-06-23 UAL2280 LAX → BOS Jun 23, 12:55 UTCJun 23, 14:55 UTC2h 0m
2026-06-23 UAL368 SFO → ORD Jun 23, 07:05 UTCJun 23, 10:29 UTC3h 25m
2026-06-22 UAL1818 - Jun 22, 23:39 UTCJun 23, 04:29 UTC4h 50m
2026-06-22 UAL1158 - Jun 22, 21:14 UTCJun 22, 21:40 UTC25m
2026-06-22 UAL1158 - Jun 22, 16:34 UTCJun 22, 17:00 UTC25m

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 N774UA page for operator, model, and routing details .

Mode-S AA79A6 frequently asked

What is Mode-S code AA79A6?
AA79A6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N774UA.
Where is Mode-S AA79A6 registered?
Mode-S code AA79A6 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 AA79A6 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA79A6, octal 52474646, decimal 11,172,262.
What flights does AA79A6 operate?
Mode-S AA79A6 has broadcast 20 distinct callsigns, including UAL300, UAL252, UAL1158, UAL253, UAL1170.