Apparatus

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sensors Mode-S transponder

A66E2B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N513SG · operated by STEVE GILBERT

Hex
A66E2B
Octal
51467053
Decimal
10,907,179
Country
US
Tail
N513SG
No current signal · last broadcast 2d ago
Flights observed
44
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A66E2B.

Country allocation

The ICAO 24-bit address A66E2B 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 1 distinct

Callsign Airline Flights Last seen
N513SG - 44 2026-07-18

Recent flights last 44

DateFlightRouteTakeoffLandingDuration
2026-07-18 N513SG SBD → WHP Jul 18, 03:05 UTCJul 18, 03:45 UTC40m
2026-07-17 N513SG WHP → SBD Jul 17, 14:50 UTCJul 17, 15:44 UTC55m
2026-07-13 N513SG - Jul 13, 03:40 UTCJul 13, 04:00 UTC20m
2026-07-13 N513SG WHP → FUL Jul 13, 02:45 UTCJul 13, 03:10 UTC25m
2026-07-11 N513SG WHP → WHP Jul 11, 02:55 UTCJul 11, 04:30 UTC1h 35m
2026-07-08 N513SG WHP → WHP Jul 8, 03:30 UTCJul 8, 03:50 UTC20m
2026-07-08 N513SG WHP → WHP Jul 8, 03:15 UTCJul 8, 03:25 UTC10m
2026-07-06 N513SG VNY → WHP Jul 6, 04:15 UTCJul 6, 04:20 UTC5m
2026-07-06 N513SG WHP → VNY Jul 6, 03:25 UTCJul 6, 04:05 UTC40m
2026-07-05 N513SG - Jul 5, 05:00 UTCJul 5, 05:25 UTC25m
2026-07-05 N513SG WHP → POC Jul 5, 01:15 UTCJul 5, 01:35 UTC20m
2026-07-04 N513SG WHP → WHP Jul 4, 03:30 UTCJul 4, 04:50 UTC1h 20m
2026-06-28 N513SG WHP → WHP Jun 28, 20:39 UTCJun 28, 20:45 UTC5m
2026-06-21 N513SG SBD → WHP Jun 21, 04:34 UTCJun 21, 05:15 UTC40m
2026-06-21 N513SG WHP → SBD Jun 21, 02:30 UTCJun 21, 03:19 UTC50m
2026-06-20 N513SG - Jun 20, 03:34 UTCJun 20, 03:39 UTC5m
2026-06-20 N513SG WHP → VNY Jun 20, 03:19 UTCJun 20, 03:29 UTC10m
2026-06-20 N513SG WHP → WHP Jun 20, 03:09 UTCJun 20, 03:14 UTC5m
2026-06-17 N513SG VNY → WHP Jun 17, 03:50 UTCJun 17, 04:00 UTC10m
2026-06-17 N513SG WHP → VNY Jun 17, 02:55 UTCJun 17, 03:40 UTC45m
2026-06-16 N513SG - Jun 16, 21:40 UTCJun 16, 22:10 UTC30m
2026-06-16 N513SG WHP → POC Jun 16, 17:40 UTCJun 16, 18:05 UTC25m
2026-06-11 N513SG SBD → WHP Jun 11, 03:45 UTCJun 11, 04:30 UTC45m
2026-06-10 N513SG SBD → SBD Jun 10, 23:50 UTCJun 11, 00:30 UTC40m
2026-06-10 N513SG SBD → SBD Jun 10, 18:40 UTCJun 10, 20:20 UTC1h 40m
2026-06-10 N513SG WHP → SBD Jun 10, 16:05 UTCJun 10, 16:50 UTC45m
2026-06-08 N513SG SBD → WHP Jun 8, 04:30 UTCJun 8, 05:15 UTC45m
2026-06-08 N513SG - Jun 8, 01:45 UTCJun 8, 02:45 UTC1h 0m
2026-06-08 N513SG WHP → WHP Jun 8, 01:35 UTCJun 8, 01:40 UTC5m
2026-06-07 N513SG WHP → WHP Jun 7, 02:55 UTCJun 7, 03:05 UTC10m
2026-05-25 N513SG - May 25, 17:20 UTCMay 25, 17:45 UTC25m
2026-05-25 N513SG - May 25, 16:05 UTCMay 25, 16:40 UTC35m
2026-05-24 N513SG - May 24, 03:10 UTCMay 24, 03:45 UTC35m
2026-05-14 N513SG - May 14, 23:55 UTCMay 15, 00:25 UTC30m
2026-05-14 N513SG - May 14, 22:15 UTCMay 14, 22:40 UTC25m
2026-05-12 N513SG - May 12, 03:10 UTCMay 12, 03:35 UTC25m
2026-05-11 N513SG - May 11, 02:35 UTCMay 11, 03:30 UTC55m
2026-05-10 N513SG SBD → WHP May 10, 03:55 UTCMay 10, 04:34 UTC40m
2026-05-10 N513SG - May 10, 01:24 UTCMay 10, 02:34 UTC1h 10m
2026-05-09 N513SG - May 9, 03:30 UTCMay 9, 03:50 UTC20m
2026-05-03 N513SG WHP → WHP May 3, 22:09 UTCMay 3, 23:35 UTC1h 25m
2026-05-01 N513SG - May 1, 22:40 UTCMay 1, 23:10 UTC30m
2026-05-01 N513SG - May 1, 21:30 UTCMay 1, 21:45 UTC15m
2026-05-01 N513SG HHR → HHR May 1, 19:35 UTCMay 1, 20:00 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 N513SG page for operator, model, and routing details .

Mode-S A66E2B frequently asked

What is Mode-S code A66E2B?
A66E2B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N513SG.
Where is Mode-S A66E2B registered?
Mode-S code A66E2B 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 A66E2B broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A66E2B, octal 51467053, decimal 10,907,179.
What flights does A66E2B operate?
Mode-S A66E2B has broadcast 1 distinct callsign, including N513SG.