Apparatus

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sensors Mode-S transponder

A271C3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N257CT · PIPER PA-28-140/150/160/180 · operated by LANE COMMUNITY COLLEGE

Hex
A271C3
Octal
50470703
Decimal
10,645,955
Country
US
Tail
N257CT
Type
P28A
No current signal · last broadcast 3h ago
Flights observed
125
Distinct callsigns
1
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A271C3.

Country allocation

The ICAO 24-bit address A271C3 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
N257CT - 125 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N257CT - Jul 15, 01:40 UTCJul 15, 03:05 UTC1h 25m
2026-07-14 N257CT - Jul 14, 22:50 UTCJul 14, 23:50 UTC1h 0m
2026-07-14 N257CT - Jul 14, 19:40 UTCJul 14, 21:40 UTC2h 0m
2026-07-14 N257CT - Jul 14, 17:25 UTCJul 14, 19:05 UTC1h 40m
2026-07-14 N257CT EUG → EUG Jul 14, 15:50 UTCJul 14, 16:45 UTC55m
2026-07-14 N257CT - Jul 14, 00:35 UTCJul 14, 01:55 UTC1h 20m
2026-07-13 N257CT - Jul 13, 22:40 UTCJul 13, 23:30 UTC50m
2026-07-13 N257CT EUG → EUG Jul 13, 20:05 UTCJul 13, 20:45 UTC40m
2026-07-13 N257CT - Jul 13, 15:55 UTCJul 13, 16:55 UTC1h 0m
2026-07-10 N257CT - Jul 10, 22:20 UTCJul 10, 23:40 UTC1h 20m
2026-07-10 N257CT EUG → EUG Jul 10, 05:15 UTCJul 10, 07:50 UTC2h 35m
2026-07-09 N257CT EUG → EUG Jul 9, 23:40 UTCJul 10, 00:45 UTC1h 5m
2026-07-09 N257CT EUG → EUG Jul 9, 22:00 UTCJul 9, 22:50 UTC50m
2026-07-09 N257CT EUG → EUG Jul 9, 20:40 UTCJul 9, 20:50 UTC10m
2026-07-09 N257CT EUG → EUG Jul 9, 19:45 UTCJul 9, 20:35 UTC50m
2026-07-07 N257CT - Jul 7, 22:35 UTCJul 8, 00:30 UTC1h 55m
2026-07-07 N257CT - Jul 7, 18:25 UTCJul 7, 20:00 UTC1h 35m
2026-07-06 N257CT - Jul 6, 22:40 UTCJul 6, 23:50 UTC1h 10m
2026-07-06 N257CT - Jul 6, 20:40 UTCJul 6, 21:45 UTC1h 5m
2026-07-06 N257CT - Jul 6, 18:40 UTCJul 6, 20:00 UTC1h 20m
2026-07-04 N257CT EUG → EUG Jul 4, 05:05 UTCJul 4, 05:35 UTC30m
2026-07-03 N257CT - Jul 3, 21:45 UTCJul 3, 23:00 UTC1h 15m
2026-07-03 N257CT - Jul 3, 19:40 UTCJul 3, 20:40 UTC1h 0m
2026-07-03 N257CT EUG → EUG Jul 3, 17:35 UTCJul 3, 18:50 UTC1h 15m
2026-07-02 N257CT EUG → EUG Jul 2, 23:05 UTCJul 3, 00:05 UTC1h 0m
2026-07-02 N257CT - Jul 2, 21:15 UTCJul 2, 21:50 UTC35m
2026-07-02 N257CT EUG → EUG Jul 2, 19:05 UTCJul 2, 19:50 UTC45m
2026-07-02 N257CT EUG → EUG Jul 2, 17:00 UTCJul 2, 18:00 UTC1h 0m
2026-07-01 N257CT EUG → EUG Jul 1, 23:45 UTCJul 2, 00:55 UTC1h 10m
2026-07-01 N257CT - Jul 1, 19:50 UTCJul 1, 20:20 UTC30m
2026-07-01 N257CT - Jul 1, 17:20 UTCJul 1, 18:40 UTC1h 20m
2026-07-01 N257CT EUG → SLE Jul 1, 14:15 UTCJul 1, 14:45 UTC30m
2026-07-01 N257CT EUG → EUG Jul 1, 04:55 UTCJul 1, 05:50 UTC55m
2026-07-01 N257CT - Jul 1, 00:25 UTCJul 1, 01:40 UTC1h 15m
2026-06-30 N257CT EUG → EUG Jun 30, 20:55 UTCJun 30, 21:55 UTC1h 0m
2026-06-30 N257CT EUG → EUG Jun 30, 19:10 UTCJun 30, 19:50 UTC40m
2026-06-29 N257CT - Jun 29, 23:34 UTCJun 30, 02:00 UTC2h 26m
2026-06-29 N257CT EUG → EUG Jun 29, 21:50 UTCJun 29, 22:49 UTC1h 0m
2026-06-29 N257CT EUG → EUG Jun 29, 15:45 UTCJun 29, 16:50 UTC1h 5m
2026-06-26 N257CT EUG → EUG Jun 26, 19:20 UTCJun 26, 21:30 UTC2h 10m
2026-06-26 N257CT EUG → EUG Jun 26, 00:50 UTCJun 26, 00:59 UTC10m
2026-06-25 N257CT EUG → EUG Jun 25, 22:45 UTCJun 26, 00:05 UTC1h 20m
2026-06-25 N257CT EUG → EUG Jun 25, 18:34 UTCJun 25, 20:49 UTC2h 15m
2026-06-24 N257CT EUG → EUG Jun 24, 22:10 UTCJun 24, 23:40 UTC1h 30m
2026-06-23 N257CT EUG → EUG Jun 23, 19:44 UTCJun 23, 21:05 UTC1h 20m
2026-06-22 N257CT - Jun 22, 22:30 UTCJun 22, 23:39 UTC1h 10m
2026-06-22 N257CT - Jun 22, 20:44 UTCJun 22, 21:49 UTC1h 5m
2026-06-22 N257CT - Jun 22, 18:44 UTCJun 22, 20:00 UTC1h 15m
2026-06-18 N257CT - Jun 18, 23:30 UTCJun 19, 02:35 UTC3h 4m
2026-06-18 N257CT - Jun 18, 20:40 UTCJun 18, 21:50 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 N257CT page for operator, model, and routing details .

Mode-S A271C3 frequently asked

What is Mode-S code A271C3?
A271C3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N257CT.
Where is Mode-S A271C3 registered?
Mode-S code A271C3 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 A271C3 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A271C3, octal 50470703, decimal 10,645,955.
What flights does A271C3 operate?
Mode-S A271C3 has broadcast 1 distinct callsign, including N257CT.