Apparatus

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sensors Mode-S transponder

AA568E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N76502 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
AA568E
Octal
52453216
Decimal
11,163,278
Country
US
Tail
N76502
Type
B738
Broadcasting now · callsign UAL2135 · 35,025 ft
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:30 UTC

Current position

AA568E is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AA568E 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
UAL2446 - 7 2026-07-11
UAL2257 United Airlines 6 2026-06-01
UAL1781 - 6 2026-07-05
UAL294 United Airlines 5 2026-05-23
UAL1816 United Airlines 5 2026-05-04
UAL1547 - 5 2026-06-29
UAL1534 United Airlines 5 2026-07-22
UAL1311 - 5 2026-07-17
UAL307 - 4 2026-04-13
UAL296 United Airlines 4 2026-06-01
UAL2493 United Airlines 4 2026-07-22
UAL2152 - 4 2026-06-24
UAL1953 United Airlines 4 2026-07-01
UAL1707 United Airlines 4 2026-05-29
UAL1255 - 4 2026-07-07
UAL687 United Airlines 3 2026-06-13
UAL669 - 3 2026-07-14
UAL667 United Airlines 3 2026-06-05
UAL480 United Airlines 3 2026-06-16
UAL395 United Airlines 3 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2306 ORD → BOS Jul 26, 14:05 UTCJul 26, 17:30 UTC3h 25m
2026-07-26 UAL2306 ORD → BOS Jul 26, 14:12 UTCJul 26, 17:11 UTC2h 59m
2026-07-25 UAL2817 EWR → LHR Jul 25, 19:40 UTCJul 25, 23:35 UTC3h 55m
2026-07-25 UAL1502 EWR → ORD Jul 25, 14:20 UTCJul 25, 17:00 UTC2h 40m
2026-07-25 UAL1710 JAX → ORD Jul 25, 01:55 UTCJul 25, 04:45 UTC2h 50m
2026-07-24 UAL2059 SFO → EWR Jul 24, 22:05 UTCJul 24, 23:45 UTC1h 40m
2026-07-24 UAL1239 EWR → RDU Jul 24, 19:15 UTCJul 24, 20:30 UTC1h 15m
2026-07-24 UAL1239 EWR → RDU Jul 24, 19:24 UTCJul 24, 20:23 UTC59m
2026-07-24 UAL503 RDU → EWR Jul 24, 15:00 UTCJul 24, 17:10 UTC2h 10m
2026-07-24 UAL1186 DFW → ORD Jul 24, 11:55 UTCJul 24, 13:45 UTC1h 50m
2026-07-24 UAL2094 IAH → LGA Jul 24, 05:55 UTCJul 24, 09:15 UTC3h 20m
2026-07-24 UAL2262 LAS → SFO Jul 24, 02:15 UTCJul 24, 03:25 UTC1h 10m
2026-07-23 UAL298 AUS → EWR Jul 23, 20:15 UTCJul 24, 00:35 UTC4h 20m
2026-07-23 UAL213 SFO → EWR Jul 23, 17:15 UTCJul 23, 18:40 UTC1h 25m
2026-07-23 UAL2098 BOS → IAD Jul 23, 14:10 UTCJul 23, 15:25 UTC1h 15m
2026-07-22 UAL2798 MIA → ORD Jul 22, 23:05 UTCJul 23, 02:20 UTC3h 15m
2026-07-22 UAL1788 SFO → IAH Jul 22, 19:50 UTCJul 22, 20:30 UTC40m
2026-07-22 UAL1714 LAS → IAH Jul 22, 17:50 UTCJul 22, 18:10 UTC20m
2026-07-22 UAL2493 PDX → DEN Jul 22, 12:35 UTCJul 22, 16:10 UTC3h 35m
2026-07-22 UAL2493 PDX → DEN Jul 22, 12:29 UTCJul 22, 16:11 UTC3h 42m
2026-07-22 UAL1534 EWR → FLL Jul 22, 00:30 UTCJul 22, 03:20 UTC2h 50m
2026-07-21 UAL1788 SFO → IAH Jul 21, 19:55 UTCJul 21, 20:30 UTC35m
2026-07-21 UAL1788 SFO → IAH Jul 21, 19:52 UTCJul 21, 20:26 UTC34m
2026-07-21 UAL1714 LAS → IAH Jul 21, 17:40 UTCJul 21, 17:55 UTC15m
2026-07-21 UAL2270 LAS → IAH Jul 21, 12:10 UTCJul 21, 15:45 UTC3h 35m
2026-07-21 UAL680 SAT → DEN Jul 21, 00:35 UTCJul 21, 03:35 UTC3h 0m
2026-07-20 UAL2821 - Jul 20, 19:45 UTCJul 20, 22:10 UTC2h 25m
2026-07-20 UAL2821 IND → DEN Jul 20, 19:50 UTCJul 20, 22:07 UTC2h 17m
2026-07-20 UAL1522 FLL → EWR Jul 20, 16:15 UTCJul 20, 18:20 UTC2h 5m
2026-07-20 UAL1241 EUG → DEN Jul 20, 12:10 UTCJul 20, 14:15 UTC2h 5m
2026-07-20 UAL1303 EWR → IAH Jul 20, 02:40 UTCJul 20, 05:00 UTC2h 20m
2026-07-20 UAL2123 AUS → SFO Jul 20, 00:10 UTCJul 20, 01:20 UTC1h 10m
2026-07-19 UAL586T DEN → MCI Jul 19, 21:35 UTCJul 19, 22:45 UTC1h 10m
2026-07-19 UAL645 LAX → EWR Jul 19, 17:05 UTCJul 19, 20:15 UTC3h 10m
2026-07-19 UAL683 IAD → TPA Jul 19, 14:00 UTCJul 19, 15:45 UTC1h 45m
2026-07-18 UAL1519 IAD → IAD Jul 18, 17:00 UTCJul 19, 00:45 UTC7h 45m
2026-07-17 UAL2275 YYC → IAD Jul 17, 21:15 UTCJul 18, 01:05 UTC3h 50m
2026-07-17 UAL2275 YYC → IAD Jul 17, 21:11 UTCJul 18, 01:03 UTC3h 52m
2026-07-17 UAL8109 ATL → YYZ Jul 17, 17:40 UTCJul 17, 19:40 UTC2h 0m
2026-07-17 UAL1311 - Jul 17, 12:19 UTCJul 17, 15:49 UTC3h 30m
2026-07-17 UAL519 DEN → FLL Jul 17, 06:15 UTCJul 17, 09:40 UTC3h 25m
2026-07-17 UAL519 DEN → FLL Jul 17, 06:12 UTCJul 17, 09:42 UTC3h 30m
2026-07-17 UAL8235 CMH → ORD Jul 17, 01:15 UTCJul 17, 04:54 UTC3h 40m
2026-07-17 UAL8235 CMH → ORD Jul 17, 01:13 UTCJul 17, 04:55 UTC3h 42m
2026-07-16 UAL277K IAH → FLL Jul 16, 22:00 UTCJul 16, 23:59 UTC2h 0m
2026-07-16 UAL1165 - Jul 16, 17:49 UTCJul 16, 18:59 UTC1h 10m
2026-07-16 UAL473 - Jul 16, 13:10 UTCJul 16, 14:25 UTC1h 15m
2026-07-16 UAL473 IAH → SJD Jul 16, 13:16 UTCJul 16, 15:25 UTC2h 9m
2026-07-16 UAL2015 - Jul 16, 00:55 UTCJul 16, 03:35 UTC2h 40m
2026-07-15 UAL1147 SFO → SAN Jul 15, 22:45 UTCJul 15, 23:55 UTC1h 10m

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 N76502 page for operator, model, and routing details .

Mode-S AA568E frequently asked

What is Mode-S code AA568E?
AA568E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N76502.
Where is Mode-S AA568E registered?
Mode-S code AA568E 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 AA568E broadcasting right now?
Yes. Mode-S AA568E is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA568E, octal 52453216, decimal 11,163,278.
What flights does AA568E operate?
Mode-S AA568E has broadcast 20 distinct callsigns, including UAL2446, UAL2257, UAL1781, UAL294, UAL1816.