Apparatus

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sensors Mode-S transponder

A1D31A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2167A · PIPER PA-32R-300/301/301T · operated by DELAWARE VALLEY AVIATION INC

Hex
A1D31A
Octal
50351432
Decimal
10,605,338
Country
US
Tail
N2167A
Type
P32R
No current signal · last broadcast 10m ago
Flights observed
66
Distinct callsigns
1
Country
US
Last broadcast
10m ago

Last known position

Most recent position reported by Mode-S A1D31A.

Country allocation

The ICAO 24-bit address A1D31A 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
N2167A - 66 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N2167A - Jul 14, 12:05 UTCJul 14, 12:25 UTC20m
2026-07-12 N2167A - Jul 12, 17:15 UTCJul 12, 18:10 UTC55m
2026-07-12 N2167A - Jul 12, 15:30 UTCJul 12, 16:30 UTC1h 0m
2026-07-10 N2167A - Jul 10, 17:15 UTCJul 10, 19:05 UTC1h 50m
2026-07-10 N2167A - Jul 10, 15:45 UTCJul 10, 16:15 UTC30m
2026-07-07 N2167A - Jul 7, 18:35 UTCJul 7, 19:00 UTC25m
2026-07-05 N2167A - Jul 5, 16:20 UTCJul 5, 17:25 UTC1h 5m
2026-07-04 N2167A - Jul 4, 14:45 UTCJul 4, 15:55 UTC1h 10m
2026-06-30 N2167A - Jun 30, 13:45 UTCJun 30, 14:10 UTC25m
2026-06-30 N2167A - Jun 30, 12:35 UTCJun 30, 13:15 UTC40m
2026-06-28 N2167A MPO → PNE Jun 28, 15:20 UTCJun 28, 16:35 UTC1h 15m
2026-06-28 N2167A - Jun 28, 13:59 UTCJun 28, 14:39 UTC40m
2026-06-27 N2167A - Jun 27, 19:29 UTCJun 27, 21:25 UTC1h 55m
2026-06-27 N2167A - Jun 27, 17:14 UTCJun 27, 17:49 UTC35m
2026-06-27 N2167A - Jun 27, 14:00 UTCJun 27, 16:10 UTC2h 10m
2026-06-25 N2167A - Jun 25, 22:59 UTCJun 26, 00:30 UTC1h 30m
2026-06-25 N2167A - Jun 25, 15:20 UTCJun 25, 16:50 UTC1h 30m
2026-06-21 N2167A - Jun 21, 19:45 UTCJun 21, 20:14 UTC30m
2026-06-21 N2167A - Jun 21, 17:54 UTCJun 21, 18:20 UTC25m
2026-06-21 N2167A - Jun 21, 15:59 UTCJun 21, 17:20 UTC1h 20m
2026-06-21 N2167A - Jun 21, 12:49 UTCJun 21, 14:54 UTC2h 5m
2026-06-19 N2167A - Jun 19, 18:39 UTCJun 19, 20:40 UTC2h 0m
2026-06-19 N2167A PNE → PVC Jun 19, 13:29 UTCJun 19, 15:14 UTC1h 45m
2026-06-17 N2167A - Jun 17, 18:35 UTCJun 17, 19:05 UTC30m
2026-06-16 N2167A - Jun 16, 19:45 UTCJun 16, 20:15 UTC31m
2026-06-16 N2167A - Jun 16, 18:29 UTCJun 16, 19:10 UTC40m
2026-06-15 N2167A - Jun 15, 20:40 UTCJun 15, 21:30 UTC50m
2026-06-15 N2167A - Jun 15, 13:40 UTCJun 15, 14:30 UTC50m
2026-06-14 N2167A - Jun 14, 18:20 UTCJun 14, 19:20 UTC1h 0m
2026-06-14 N2167A - Jun 14, 14:20 UTCJun 14, 15:10 UTC50m
2026-06-13 N2167A - Jun 13, 17:00 UTCJun 13, 18:10 UTC1h 10m
2026-06-13 N2167A - Jun 13, 14:05 UTCJun 13, 15:15 UTC1h 10m
2026-06-11 N2167A - Jun 11, 17:50 UTCJun 11, 18:45 UTC55m
2026-06-11 N2167A - Jun 11, 16:25 UTCJun 11, 17:15 UTC50m
2026-06-07 N2167A LNS → PNE Jun 7, 17:25 UTCJun 7, 18:00 UTC35m
2026-06-07 N2167A - Jun 7, 16:20 UTCJun 7, 16:55 UTC35m
2026-06-06 N2167A - Jun 6, 20:39 UTCJun 6, 23:05 UTC2h 25m
2026-06-04 N2167A - Jun 4, 15:10 UTCJun 4, 17:45 UTC2h 35m
2026-06-04 N2167A - Jun 4, 01:50 UTCJun 4, 02:40 UTC50m
2026-05-28 N2167A - May 28, 14:50 UTCMay 28, 15:05 UTC15m
2026-05-28 N2167A - May 28, 13:40 UTCMay 28, 13:55 UTC15m
2026-05-20 N2167A PNE → PNE May 20, 13:45 UTCMay 20, 14:35 UTC50m
2026-05-18 N2167A - May 18, 21:55 UTCMay 18, 22:30 UTC35m
2026-05-16 N2167A - May 16, 20:00 UTCMay 16, 20:45 UTC45m
2026-05-16 N2167A - May 16, 15:50 UTCMay 16, 16:25 UTC35m
2026-05-14 N2167A - May 14, 17:00 UTCMay 14, 17:10 UTC10m
2026-05-12 N2167A - May 12, 19:20 UTCMay 12, 20:15 UTC55m
2026-05-12 N2167A - May 12, 13:15 UTCMay 12, 14:05 UTC50m
2026-05-10 N2167A - May 10, 17:59 UTCMay 10, 19:40 UTC1h 40m
2026-05-09 N2167A - May 9, 14:40 UTCMay 9, 16:05 UTC1h 25m

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 N2167A page for operator, model, and routing details .

Mode-S A1D31A frequently asked

What is Mode-S code A1D31A?
A1D31A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2167A.
Where is Mode-S A1D31A registered?
Mode-S code A1D31A 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 A1D31A broadcasting right now?
No active broadcast right now. Last signal was 10m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1D31A, octal 50351432, decimal 10,605,338.
What flights does A1D31A operate?
Mode-S A1D31A has broadcast 1 distinct callsign, including N2167A.