Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AA56F7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N76532 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
AA56F7
Octal
52453367
Decimal
11,163,383
Country
US
Tail
N76532
Type
B738
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
526
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AA56F7.

Country allocation

The ICAO 24-bit address AA56F7 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
UAL2401 - 7 2026-06-27
UAL2422 - 6 2026-06-27
UAL2672 - 5 2026-06-26
UAL1712 United Airlines 5 2026-07-26
UAL1522 United Airlines 5 2026-04-16
UAL1501 - 5 2026-07-20
UAL532 United Airlines 4 2026-07-22
UAL2395 - 4 2026-07-02
UAL2245 United Airlines 4 2026-04-29
UAL2189 United Airlines 4 2026-05-14
UAL2034 United Airlines 4 2026-05-20
UAL1816 United Airlines 4 2026-05-03
UAL1588 United Airlines 4 2026-05-29
UAL1301 - 4 2026-07-18
UAL1212 United Airlines 4 2026-05-31
UAL728 United Airlines 3 2026-04-17
UAL692 - 3 2026-07-14
UAL630 United Airlines 3 2026-05-15
UAL594 United Airlines 3 2026-07-20
UAL539 United Airlines 3 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL267 BOS → DEN Jul 26, 21:25 UTCJul 26, 21:45 UTC20m
2026-07-26 UAL1712 LAX → SFO Jul 26, 16:55 UTCJul 26, 19:55 UTC3h 0m
2026-07-26 UAL539 PHL → SFO Jul 26, 12:40 UTCJul 26, 14:25 UTC1h 45m
2026-07-26 UAL1621 LAX → MCO Jul 26, 00:10 UTCJul 26, 02:35 UTC2h 25m
2026-07-25 UAL1811 ORD → BDL Jul 25, 18:15 UTCJul 25, 20:20 UTC2h 5m
2026-07-25 UAL2201 ONT → SFO Jul 25, 14:35 UTCJul 25, 16:10 UTC1h 35m
2026-07-25 UAL1077 EWR → MSP Jul 25, 11:10 UTCJul 25, 12:30 UTC1h 20m
2026-07-25 UAL1830 SFO → BNA Jul 25, 01:51 UTCJul 25, 03:18 UTC1h 27m
2026-07-25 UAL1830 SFO → BNA Jul 25, 01:40 UTCJul 25, 03:30 UTC1h 50m
2026-07-24 UAL2306 ORD → BOS Jul 24, 22:30 UTCJul 25, 00:20 UTC1h 50m
2026-07-24 UAL511 IAH → SFO Jul 24, 18:00 UTCJul 24, 19:30 UTC1h 30m
2026-07-24 UAL2218 SJU → EWR Jul 24, 15:20 UTCJul 24, 16:40 UTC1h 20m
2026-07-24 UAL2653 RSW → EWR Jul 24, 12:20 UTCJul 24, 13:50 UTC1h 30m
2026-07-24 UAL1658 IAD → BDL Jul 24, 03:30 UTCJul 24, 04:50 UTC1h 20m
2026-07-23 UAL2101 PBI → EWR Jul 23, 21:30 UTCJul 24, 01:20 UTC3h 50m
2026-07-23 UAL2205 CMH → IAH Jul 23, 15:25 UTCJul 23, 19:25 UTC4h 0m
2026-07-23 UAL575 BOS → ORD Jul 23, 11:20 UTCJul 23, 13:15 UTC1h 55m
2026-07-22 UAL2864 IAH → CLT Jul 22, 23:20 UTCJul 23, 01:25 UTC2h 5m
2026-07-22 UAL2864 IAH → CLT Jul 22, 23:33 UTCJul 23, 01:26 UTC1h 53m
2026-07-22 UAL2457 RTB → IAH Jul 22, 18:40 UTCJul 22, 20:47 UTC2h 7m
2026-07-22 UAL2457 - Jul 22, 14:50 UTCJul 22, 20:45 UTC5h 55m
2026-07-22 UAL532 DEN → ORD Jul 22, 11:30 UTCJul 22, 12:55 UTC1h 25m
2026-07-22 UAL532 DEN → ORD Jul 22, 11:19 UTCJul 22, 13:00 UTC1h 41m
2026-07-21 UAL2050 SFO → DEN Jul 21, 23:25 UTCJul 22, 01:05 UTC1h 40m
2026-07-21 UAL2103 ORD → PHL Jul 21, 15:10 UTCJul 21, 20:55 UTC5h 45m
2026-07-21 UAL469 - Jul 21, 12:55 UTCJul 21, 13:40 UTC45m
2026-07-21 UAL1542 SFO → YVR Jul 21, 01:40 UTCJul 21, 02:10 UTC30m
2026-07-20 UAL1834 DFW → EWR Jul 20, 22:00 UTCJul 20, 23:55 UTC1h 54m
2026-07-20 UAL1501 - Jul 20, 18:05 UTCJul 20, 20:30 UTC2h 25m
2026-07-20 UAL2760 - Jul 20, 13:35 UTCJul 20, 16:25 UTC2h 50m
2026-07-20 UAL594 DEN → PHX Jul 20, 06:10 UTCJul 20, 06:40 UTC30m
2026-07-20 UAL2282 SAN → IAD Jul 20, 04:00 UTCJul 20, 04:40 UTC40m
2026-07-20 UAL751 SFO → LAS Jul 20, 01:05 UTCJul 20, 02:20 UTC1h 15m
2026-07-20 UAL751 SFO → LAS Jul 20, 01:08 UTCJul 20, 02:15 UTC1h 7m
2026-07-19 UAL2823 IAD → EWR Jul 19, 22:20 UTCJul 19, 23:15 UTC55m
2026-07-19 UAL2823 IAD → EWR Jul 19, 22:00 UTCJul 19, 23:14 UTC1h 14m
2026-07-19 UAL571 AUS → SFO Jul 19, 19:30 UTCJul 19, 20:35 UTC1h 5m
2026-07-19 UAL1113 ORD → MSP Jul 19, 16:55 UTCJul 19, 18:00 UTC1h 5m
2026-07-19 UAL1980 SFO → SAN Jul 19, 13:50 UTCJul 19, 15:00 UTC1h 10m
2026-07-19 UAL2126 - Jul 19, 08:00 UTCJul 19, 12:20 UTC4h 20m
2026-07-18 UAL1594 - Jul 18, 21:05 UTCJul 19, 01:20 UTC4h 15m
2026-07-18 UAL2386 BUR → SFO Jul 18, 18:20 UTCJul 18, 19:10 UTC50m
2026-07-18 UAL8107 SFO → BUR Jul 18, 16:20 UTCJul 18, 17:15 UTC55m
2026-07-18 UAL8107 SFO → BUR Jul 18, 16:22 UTCJul 18, 17:08 UTC46m
2026-07-18 UAL1301 - Jul 18, 13:05 UTCJul 18, 15:10 UTC2h 5m
2026-07-18 UAL1301 DEN → SFO Jul 18, 12:18 UTCJul 18, 15:12 UTC2h 54m
2026-07-18 UAL719 SJC → DEN Jul 18, 01:15 UTCJul 18, 03:15 UTC2h 1m
2026-07-17 UAL2808 DEN → SJC Jul 17, 18:25 UTCJul 17, 20:29 UTC2h 5m
2026-07-17 UAL1727 - Jul 17, 13:10 UTCJul 17, 16:04 UTC2h 55m
2026-07-16 UAL248 BOS → IAH Jul 16, 23:49 UTCJul 17, 02:34 UTC2h 45m

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 N76532 page for operator, model, and routing details .

Mode-S AA56F7 frequently asked

What is Mode-S code AA56F7?
AA56F7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N76532.
Where is Mode-S AA56F7 registered?
Mode-S code AA56F7 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 AA56F7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA56F7, octal 52453367, decimal 11,163,383.
What flights does AA56F7 operate?
Mode-S AA56F7 has broadcast 20 distinct callsigns, including UAL2401, UAL2422, UAL2672, UAL1712, UAL1522.