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sensors Mode-S transponder

A11271

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1685D · operated by ANGRISANI ROBERT J

Hex
A11271
Octal
50211161
Decimal
10,556,017
Country
US
Tail
N1685D
Type
C170
No current signal · last broadcast Jun 19, 04:14 UTC
Flights observed
46
Distinct callsigns
1
Country
US
Last broadcast
Jun 19, 04:14 UTC

Last known position

Most recent position reported by Mode-S A11271.

Country allocation

The ICAO 24-bit address A11271 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
N1685D - 46 2026-06-19

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-06-19 N1685D OAK → SAC Jun 19, 03:34 UTCJun 19, 04:10 UTC35m
2026-06-19 N1685D SAC → OAK Jun 19, 00:10 UTCJun 19, 00:49 UTC40m
2026-06-17 N1685D - Jun 17, 03:20 UTCJun 17, 04:20 UTC1h 0m
2026-06-17 N1685D - Jun 17, 01:45 UTCJun 17, 02:40 UTC55m
2026-06-11 N1685D - Jun 11, 20:45 UTCJun 11, 20:55 UTC10m
2026-06-11 N1685D SAC → MHR Jun 11, 19:45 UTCJun 11, 20:00 UTC15m
2026-06-11 N1685D OAK → SAC Jun 11, 04:10 UTCJun 11, 04:55 UTC45m
2026-06-10 N1685D - Jun 10, 19:50 UTCJun 10, 21:00 UTC1h 10m
2026-06-10 N1685D OAK → SAC Jun 10, 04:15 UTCJun 10, 05:00 UTC45m
2026-06-09 N1685D SAC → OAK Jun 9, 20:20 UTCJun 9, 21:10 UTC50m
2026-06-09 N1685D OAK → SAC Jun 9, 01:15 UTCJun 9, 01:50 UTC35m
2026-06-08 N1685D SAC → OAK Jun 8, 19:40 UTCJun 8, 20:20 UTC40m
2026-06-07 N1685D - Jun 7, 23:10 UTCJun 7, 23:25 UTC15m
2026-06-07 N1685D - Jun 7, 20:10 UTCJun 7, 20:30 UTC20m
2026-06-04 N1685D SAC → SAC Jun 4, 19:00 UTCJun 4, 19:45 UTC45m
2026-06-04 N1685D - Jun 4, 04:55 UTCJun 4, 05:05 UTC10m
2026-06-04 N1685D - Jun 4, 00:55 UTCJun 4, 01:10 UTC15m
2026-05-31 N1685D - May 31, 23:45 UTCJun 1, 00:00 UTC15m
2026-05-31 N1685D - May 31, 22:40 UTCMay 31, 23:05 UTC25m
2026-05-31 N1685D - May 31, 20:40 UTCMay 31, 21:10 UTC30m
2026-05-31 N1685D - May 31, 18:40 UTCMay 31, 19:05 UTC25m
2026-05-31 N1685D - May 31, 17:25 UTCMay 31, 17:55 UTC30m
2026-05-31 N1685D - May 31, 14:00 UTCMay 31, 14:15 UTC15m
2026-05-30 N1685D - May 30, 22:30 UTCMay 30, 22:45 UTC15m
2026-05-21 N1685D - May 21, 21:30 UTCMay 21, 21:45 UTC15m
2026-05-21 N1685D - May 21, 18:40 UTCMay 21, 18:50 UTC10m
2026-05-20 N1685D - May 20, 21:00 UTCMay 20, 22:05 UTC1h 5m
2026-05-20 N1685D - May 20, 19:25 UTCMay 20, 19:55 UTC30m
2026-05-20 N1685D - May 20, 18:15 UTCMay 20, 18:50 UTC35m
2026-05-20 N1685D SAC → OAK May 20, 16:55 UTCMay 20, 17:30 UTC35m
2026-05-15 N1685D - May 15, 23:40 UTCMay 15, 23:55 UTC15m
2026-05-15 N1685D - May 15, 21:00 UTCMay 15, 21:30 UTC30m
2026-05-15 N1685D SAC → AUN May 15, 17:55 UTCMay 15, 18:20 UTC25m
2026-05-10 N1685D - May 10, 02:10 UTCMay 10, 02:24 UTC15m
2026-05-09 N1685D - May 9, 22:49 UTCMay 9, 23:05 UTC15m
2026-04-30 N1685D - Apr 30, 03:15 UTCApr 30, 03:25 UTC10m
2026-04-30 N1685D - Apr 30, 00:40 UTCApr 30, 00:55 UTC15m
2026-04-29 N1685D - Apr 29, 18:25 UTCApr 29, 18:40 UTC15m
2026-04-29 N1685D - Apr 29, 16:30 UTCApr 29, 16:50 UTC20m
2026-04-29 N1685D SAC → MCC Apr 29, 16:10 UTCApr 29, 16:15 UTC5m
2026-04-20 N1685D - Apr 20, 01:55 UTCApr 20, 02:45 UTC50m
2026-04-19 N1685D - Apr 19, 21:35 UTCApr 19, 23:05 UTC1h 30m
2026-04-17 N1685D - Apr 17, 15:20 UTCApr 17, 15:45 UTC25m
2026-04-17 N1685D - Apr 17, 14:45 UTCApr 17, 15:15 UTC29m
2026-04-17 N1685D - Apr 17, 13:40 UTCApr 17, 14:15 UTC35m
2026-04-17 N1685D SAC → SAC Apr 17, 02:30 UTCApr 17, 02:40 UTC10m

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 N1685D page for operator, model, and routing details .

Mode-S A11271 frequently asked

What is Mode-S code A11271?
A11271 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1685D.
Where is Mode-S A11271 registered?
Mode-S code A11271 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 A11271 broadcasting right now?
No active broadcast right now. Last signal was Jun 19, 04:14 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11271, octal 50211161, decimal 10,556,017.
What flights does A11271 operate?
Mode-S A11271 has broadcast 1 distinct callsign, including N1685D.