Apparatus

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sensors Mode-S transponder

A1D61B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N21714 · CESSNA 172 Skyhawk · operated by AERO EQUITIES LLC

Hex
A1D61B
Octal
50353033
Decimal
10,606,107
Country
US
Tail
N21714
Type
C172
No current signal · last broadcast 2h ago
Flights observed
97
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1D61B.

Country allocation

The ICAO 24-bit address A1D61B 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
N21714 - 97 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 N21714 - Jun 2, 22:20 UTCJun 2, 23:30 UTC1h 10m
2026-06-02 N21714 SBD → MYF Jun 2, 20:00 UTCJun 2, 21:15 UTC1h 15m
2026-06-02 N21714 HMT → SBD Jun 2, 19:25 UTCJun 2, 19:50 UTC25m
2026-06-02 N21714 MYF → HMT Jun 2, 18:35 UTCJun 2, 19:20 UTC45m
2026-06-01 N21714 MYF → MYF Jun 1, 17:05 UTCJun 1, 18:25 UTC1h 20m
2026-06-01 N21714 - Jun 1, 01:40 UTCJun 1, 02:35 UTC55m
2026-05-31 N21714 - May 31, 19:40 UTCMay 31, 21:05 UTC1h 25m
2026-05-30 N21714 SBD → MYF May 30, 21:00 UTCMay 30, 22:00 UTC1h 0m
2026-05-30 N21714 - May 30, 20:25 UTCMay 30, 20:55 UTC30m
2026-05-30 N21714 - May 30, 19:40 UTCMay 30, 20:15 UTC35m
2026-05-30 N21714 NKX → MYF May 30, 16:30 UTCMay 30, 17:45 UTC1h 15m
2026-05-30 N21714 MYF → MYF May 30, 14:05 UTCMay 30, 15:35 UTC1h 30m
2026-05-29 N21714 - May 29, 19:40 UTCMay 29, 21:05 UTC1h 25m
2026-05-28 N21714 MYF → MYF May 28, 22:30 UTCMay 29, 00:05 UTC1h 35m
2026-05-28 N21714 - May 28, 19:45 UTCMay 28, 21:20 UTC1h 35m
2026-05-27 N21714 MYF → MYF May 27, 21:50 UTCMay 27, 23:05 UTC1h 15m
2026-05-27 N21714 - May 27, 19:40 UTCMay 27, 20:50 UTC1h 10m
2026-05-21 N21714 HMT → MYF May 21, 21:15 UTCMay 21, 22:00 UTC45m
2026-05-21 N21714 - May 21, 19:50 UTCMay 21, 21:10 UTC1h 20m
2026-05-21 N21714 HMT → MYF May 21, 18:15 UTCMay 21, 18:55 UTC40m
2026-05-21 N21714 - May 21, 17:55 UTCMay 21, 18:10 UTC15m
2026-05-21 N21714 - May 21, 16:45 UTCMay 21, 17:50 UTC1h 5m
2026-05-21 N21714 - May 21, 13:50 UTCMay 21, 15:55 UTC2h 5m
2026-05-20 N21714 MYF → MYF May 20, 22:10 UTCMay 20, 23:55 UTC1h 45m
2026-05-20 N21714 MYF → MYF May 20, 19:50 UTCMay 20, 21:10 UTC1h 20m
2026-05-20 N21714 - May 20, 18:05 UTCMay 20, 19:00 UTC55m
2026-05-20 N21714 - May 20, 16:40 UTCMay 20, 17:40 UTC1h 0m
2026-05-19 N21714 MYF → MYF May 19, 22:00 UTCMay 19, 23:50 UTC1h 50m
2026-05-19 N21714 - May 19, 20:10 UTCMay 19, 21:10 UTC1h 0m
2026-05-19 N21714 - May 19, 16:35 UTCMay 19, 18:15 UTC1h 40m
2026-05-19 N21714 MYF → MYF May 19, 14:25 UTCMay 19, 15:20 UTC55m
2026-05-19 N21714 - May 19, 00:45 UTCMay 19, 02:10 UTC1h 25m
2026-05-18 N21714 MYF → MYF May 18, 22:20 UTCMay 18, 23:20 UTC1h 0m
2026-05-18 N21714 MYF → MYF May 18, 19:25 UTCMay 18, 20:20 UTC55m
2026-05-16 N21714 MYF → MYF May 16, 00:50 UTCMay 16, 01:20 UTC30m
2026-05-15 N21714 - May 15, 20:15 UTCMay 15, 21:25 UTC1h 10m
2026-05-15 N21714 - May 15, 18:10 UTCMay 15, 18:45 UTC35m
2026-05-14 N21714 MYF → MYF May 14, 22:00 UTCMay 15, 00:00 UTC2h 0m
2026-05-13 N21714 - May 13, 22:35 UTCMay 13, 22:45 UTC10m
2026-05-13 N21714 MYF → MYF May 13, 16:50 UTCMay 13, 18:00 UTC1h 10m
2026-05-13 N21714 MYF → MYF May 13, 14:35 UTCMay 13, 15:40 UTC1h 5m
2026-05-12 N21714 - May 12, 21:50 UTCMay 12, 22:50 UTC1h 0m
2026-05-11 N21714 - May 11, 19:45 UTCMay 11, 21:10 UTC1h 25m
2026-05-11 N21714 MYF → MYF May 11, 16:30 UTCMay 11, 18:30 UTC2h 1m
2026-05-10 N21714 MYF → MYF May 10, 21:49 UTCMay 10, 23:00 UTC1h 10m
2026-05-10 N21714 MYF → MYF May 10, 19:35 UTCMay 10, 20:35 UTC1h 0m
2026-05-10 N21714 MYF → MYF May 10, 16:44 UTCMay 10, 18:20 UTC1h 35m
2026-05-09 N21714 - May 9, 22:20 UTCMay 9, 23:30 UTC1h 10m
2026-05-09 N21714 - May 9, 19:55 UTCMay 9, 20:55 UTC1h 0m
2026-05-09 N21714 - May 9, 01:45 UTCMay 9, 02:35 UTC50m

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 N21714 page for operator, model, and routing details .

Mode-S A1D61B frequently asked

What is Mode-S code A1D61B?
A1D61B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N21714.
Where is Mode-S A1D61B registered?
Mode-S code A1D61B 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 A1D61B broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1D61B, octal 50353033, decimal 10,606,107.
What flights does A1D61B operate?
Mode-S A1D61B has broadcast 1 distinct callsign, including N21714.