Apparatus

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sensors Mode-S transponder

A75966

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N57286 · operated by UNITED AIRLINES INC

Hex
A75966
Octal
51654546
Decimal
10,967,398
Country
US
Tail
N57286
Type
B38M
Broadcasting now · callsign UAL1067 · 32,000 ft
Flights observed
444
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Current position

A75966 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A75966 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
UAL1099 United Airlines 6 2026-07-21
UAL474 United Airlines 5 2026-07-23
UAL359 United Airlines 5 2026-07-23
UAL231 - 5 2026-06-20
UAL206 - 5 2026-06-24
UAL1697 United Airlines 5 2026-07-22
UAL1450 United Airlines 5 2026-07-20
UAL368 United Airlines 4 2026-04-17
UAL327 - 4 2026-04-13
UAL1880 United Airlines 4 2026-05-10
UAL1589 - 4 2026-07-13
UAL1149 - 4 2026-07-08
UAL1096 United Airlines 4 2026-07-21
UAL709 United Airlines 3 2026-04-15
UAL580 - 3 2026-04-13
UAL436 United Airlines 3 2026-04-17
UAL341 - 3 2026-06-17
UAL278 - 3 2026-07-11
UAL268 United Airlines 3 2026-06-23
UAL2657 United Airlines 3 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1009 EWR → MCO Jul 26, 19:45 UTCJul 26, 21:30 UTC1h 45m
2026-07-26 UAL1008 BOS → SFO Jul 26, 14:05 UTCJul 26, 17:50 UTC3h 45m
2026-07-26 UAL660 EWR → CHS Jul 26, 10:10 UTCJul 26, 11:55 UTC1h 45m
2026-07-26 UAL1744 IAD → ORD Jul 26, 04:25 UTCJul 26, 05:50 UTC1h 25m
2026-07-25 UAL1952 LGA → IAH Jul 25, 19:35 UTCJul 26, 00:30 UTC4h 55m
2026-07-25 UAL1135 IAH → EWR Jul 25, 13:10 UTCJul 25, 17:50 UTC4h 40m
2026-07-24 UAL1009 EWR → MCO Jul 24, 19:55 UTCJul 24, 23:50 UTC3h 55m
2026-07-24 UAL1008 BOS → SFO Jul 24, 14:00 UTCJul 24, 17:50 UTC3h 50m
2026-07-24 UAL660 EWR → CHS Jul 24, 10:10 UTCJul 24, 12:05 UTC1h 55m
2026-07-24 UAL1744 IAD → ORD Jul 24, 03:30 UTCJul 24, 04:50 UTC1h 20m
2026-07-23 UAL474 MEX → ORD Jul 23, 20:35 UTCJul 24, 00:10 UTC3h 35m
2026-07-23 UAL474 MEX → ORD Jul 23, 20:28 UTCJul 23, 23:53 UTC3h 25m
2026-07-23 UAL359 ORD → MEX Jul 23, 18:10 UTCJul 23, 18:20 UTC10m
2026-07-23 UAL359 ORD → MEX Jul 23, 14:50 UTCJul 23, 17:35 UTC2h 45m
2026-07-23 UAL2389 LGA → ORD Jul 23, 10:25 UTCJul 23, 12:30 UTC2h 5m
2026-07-22 UAL8121 CDG → YUL Jul 22, 23:40 UTCJul 23, 02:40 UTC3h 0m
2026-07-22 UAL8121 CDG → YUL Jul 22, 22:32 UTCJul 23, 02:38 UTC4h 6m
2026-07-22 UAL2200 EWR → SAN Jul 22, 17:30 UTCJul 22, 21:15 UTC3h 45m
2026-07-22 UAL2200 EWR → SAN Jul 22, 16:53 UTCJul 22, 21:11 UTC4h 18m
2026-07-22 UAL1697 ATL → EWR Jul 22, 12:20 UTCJul 22, 15:20 UTC3h 0m
2026-07-22 UAL1055 - Jul 22, 01:20 UTCJul 22, 04:30 UTC3h 10m
2026-07-21 UAL1099 SJO → IAH Jul 21, 19:45 UTCJul 21, 22:55 UTC3h 10m
2026-07-21 UAL1096 IAH → SJO Jul 21, 14:55 UTCJul 21, 18:10 UTC3h 15m
2026-07-21 UAL1229 EWR → MCI Jul 21, 10:20 UTCJul 21, 12:50 UTC2h 30m
2026-07-21 UAL2237 ORD → EWR Jul 21, 01:15 UTCJul 21, 03:40 UTC2h 25m
2026-07-20 UAL1099 SJO → IAH Jul 20, 19:35 UTCJul 20, 22:45 UTC3h 10m
2026-07-20 UAL1099 SJO → IAH Jul 20, 19:42 UTCJul 20, 22:36 UTC2h 54m
2026-07-20 UAL1096 IAH → SJO Jul 20, 14:50 UTCJul 20, 15:30 UTC40m
2026-07-20 UAL1096 IAH → SJO Jul 20, 14:58 UTCJul 20, 18:03 UTC3h 5m
2026-07-20 UAL1450 EWR → PBI Jul 20, 10:15 UTCJul 20, 12:45 UTC2h 30m
2026-07-20 UAL2224 - Jul 20, 01:10 UTCJul 20, 04:05 UTC2h 55m
2026-07-19 UAL1099 - Jul 19, 20:10 UTCJul 19, 23:15 UTC3h 5m
2026-07-19 UAL1096 IAH → SJO Jul 19, 15:10 UTCJul 19, 18:25 UTC3h 15m
2026-07-19 UAL2606 - Jul 19, 10:45 UTCJul 19, 13:05 UTC2h 20m
2026-07-19 UAL1829 - Jul 19, 00:20 UTCJul 19, 02:25 UTC2h 5m
2026-07-19 UAL1829 IAH → MIA Jul 19, 00:19 UTCJul 19, 02:27 UTC2h 8m
2026-07-18 UAL1455 EWR → MIA Jul 18, 19:35 UTCJul 18, 21:50 UTC2h 15m
2026-07-18 UAL1454 IAH → NAS Jul 18, 15:30 UTCJul 18, 17:45 UTC2h 15m
2026-07-18 UAL2302 - Jul 18, 11:10 UTCJul 18, 13:40 UTC2h 30m
2026-07-18 UAL2439 - Jul 18, 00:00 UTCJul 18, 02:35 UTC2h 35m
2026-07-18 UAL2439 IAH → ORF Jul 18, 00:00 UTCJul 18, 02:28 UTC2h 28m
2026-07-17 UAL2674 - Jul 17, 18:44 UTCJul 17, 21:50 UTC3h 5m
2026-07-17 UAL2133 - Jul 17, 13:29 UTCJul 17, 16:40 UTC3h 10m
2026-07-16 UAL692 - Jul 16, 21:45 UTCJul 17, 00:45 UTC3h 0m
2026-07-16 UAL1697 - Jul 16, 12:14 UTCJul 16, 15:19 UTC3h 5m
2026-07-16 UAL1697 IAH → LGA Jul 16, 12:19 UTCJul 16, 15:19 UTC3h 0m
2026-07-15 UAL2198 - Jul 15, 23:20 UTCJul 16, 01:45 UTC2h 25m
2026-07-15 UAL1238 - Jul 15, 19:35 UTCJul 15, 21:50 UTC2h 15m
2026-07-15 UAL700 - Jul 15, 14:45 UTCJul 15, 17:40 UTC2h 55m
2026-07-15 UAL2761 - Jul 15, 01:25 UTCJul 15, 04:20 UTC2h 55m

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 N57286 page for operator, model, and routing details .

Mode-S A75966 frequently asked

What is Mode-S code A75966?
A75966 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N57286.
Where is Mode-S A75966 registered?
Mode-S code A75966 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 A75966 broadcasting right now?
Yes. Mode-S A75966 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A75966, octal 51654546, decimal 10,967,398.
What flights does A75966 operate?
Mode-S A75966 has broadcast 20 distinct callsigns, including UAL1099, UAL474, UAL359, UAL231, UAL206.