Apparatus

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sensors Mode-S transponder

A1210A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N172EL · CESSNA 172 Skyhawk

Hex
A1210A
Octal
50220412
Decimal
10,559,754
Country
US
Tail
N172EL
Type
C172
No current signal · last broadcast 6h ago
Flights observed
122
Distinct callsigns
1
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A1210A.

Country allocation

The ICAO 24-bit address A1210A 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
N172EL - 122 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N172EL PAO → PAO May 29, 21:45 UTCMay 29, 23:35 UTC1h 50m
2026-05-29 N172EL PAO → PAO May 29, 18:45 UTCMay 29, 19:45 UTC1h 0m
2026-05-29 N172EL PAO → PAO May 29, 18:25 UTCMay 29, 18:35 UTC10m
2026-05-29 N172EL PAO → PAO May 29, 14:25 UTCMay 29, 15:00 UTC35m
2026-05-28 N172EL PAO → PAO May 28, 20:30 UTCMay 28, 20:45 UTC15m
2026-05-28 N172EL PAO → PAO May 28, 20:10 UTCMay 28, 20:25 UTC15m
2026-05-28 N172EL PAO → PAO May 28, 19:50 UTCMay 28, 19:55 UTC5m
2026-05-27 N172EL PAO → PAO May 27, 21:40 UTCMay 27, 22:35 UTC55m
2026-05-27 N172EL PAO → PAO May 27, 19:40 UTCMay 27, 20:10 UTC30m
2026-05-27 N172EL PAO → PAO May 27, 18:00 UTCMay 27, 18:40 UTC40m
2026-05-26 N172EL PAO → PAO May 26, 01:40 UTCMay 26, 03:15 UTC1h 35m
2026-05-25 N172EL PAO → PAO May 25, 17:20 UTCMay 25, 17:45 UTC25m
2026-05-24 N172EL LVK → PAO May 24, 23:00 UTCMay 24, 23:35 UTC35m
2026-05-24 N172EL PAO → PAO May 24, 21:25 UTCMay 24, 21:45 UTC20m
2026-05-24 N172EL - May 24, 19:10 UTCMay 24, 19:35 UTC25m
2026-05-24 N172EL PAO → PAO May 24, 16:40 UTCMay 24, 19:05 UTC2h 25m
2026-05-23 N172EL PAO → PAO May 23, 21:45 UTCMay 24, 00:00 UTC2h 15m
2026-05-23 N172EL SAC → PAO May 23, 18:00 UTCMay 23, 19:35 UTC1h 35m
2026-05-23 N172EL - May 23, 17:30 UTCMay 23, 17:35 UTC5m
2026-05-23 N172EL PAO → MHR May 23, 16:35 UTCMay 23, 17:20 UTC45m
2026-05-23 N172EL PAO → PAO May 23, 01:05 UTCMay 23, 01:15 UTC10m
2026-05-22 N172EL PAO → PAO May 22, 23:35 UTCMay 23, 00:50 UTC1h 15m
2026-05-22 N172EL - May 22, 19:40 UTCMay 22, 20:45 UTC1h 5m
2026-05-22 N172EL - May 22, 18:50 UTCMay 22, 19:15 UTC25m
2026-05-22 N172EL PAO → PAO May 22, 18:00 UTCMay 22, 18:05 UTC5m
2026-05-22 N172EL PAO → PAO May 22, 17:40 UTCMay 22, 17:50 UTC10m
2026-05-22 N172EL PAO → PAO May 22, 17:20 UTCMay 22, 17:25 UTC5m
2026-05-20 N172EL PAO → PAO May 20, 19:45 UTCMay 20, 20:35 UTC50m
2026-05-20 N172EL PAO → PAO May 20, 14:35 UTCMay 20, 15:40 UTC1h 5m
2026-05-19 N172EL PAO → PAO May 19, 23:10 UTCMay 19, 23:20 UTC10m
2026-05-19 N172EL - May 19, 22:30 UTCMay 19, 23:05 UTC35m
2026-05-19 N172EL PAO → PAO May 19, 22:20 UTCMay 19, 22:25 UTC5m
2026-05-19 N172EL PAO → PAO May 19, 21:05 UTCMay 19, 21:20 UTC15m
2026-05-19 N172EL PAO → PAO May 19, 19:55 UTCMay 19, 20:45 UTC50m
2026-05-19 N172EL - May 19, 18:30 UTCMay 19, 18:35 UTC5m
2026-05-19 N172EL - May 19, 18:15 UTCMay 19, 18:20 UTC5m
2026-05-19 N172EL PAO → PAO May 19, 17:45 UTCMay 19, 18:10 UTC25m
2026-05-19 N172EL - May 19, 16:00 UTCMay 19, 16:45 UTC45m
2026-05-19 N172EL PAO → RHV May 19, 15:40 UTCMay 19, 15:55 UTC15m
2026-05-19 N172EL PAO → PAO May 19, 01:10 UTCMay 19, 01:45 UTC35m
2026-05-17 N172EL PAO → PAO May 17, 20:55 UTCMay 17, 21:40 UTC45m
2026-05-17 N172EL - May 17, 17:50 UTCMay 17, 19:40 UTC1h 50m
2026-05-17 N172EL PAO → CCR May 17, 16:40 UTCMay 17, 17:40 UTC1h 0m
2026-05-17 N172EL - May 17, 00:15 UTCMay 17, 01:00 UTC45m
2026-05-16 N172EL PAO → SAC May 16, 23:00 UTCMay 16, 23:55 UTC55m
2026-05-16 N172EL PAO → PAO May 16, 19:00 UTCMay 16, 19:45 UTC45m
2026-05-16 N172EL PAO → PAO May 16, 14:31 UTCMay 16, 15:16 UTC45m
2026-05-15 N172EL PAO → PAO May 15, 20:45 UTCMay 15, 20:50 UTC5m
2026-05-15 N172EL PAO → PAO May 15, 19:00 UTCMay 15, 20:40 UTC1h 40m
2026-05-14 N172EL PAO → PAO May 14, 21:45 UTCMay 14, 22:45 UTC1h 0m

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 N172EL page for operator, model, and routing details .

Mode-S A1210A frequently asked

What is Mode-S code A1210A?
A1210A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N172EL.
Where is Mode-S A1210A registered?
Mode-S code A1210A 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 A1210A broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1210A, octal 50220412, decimal 10,559,754.
What flights does A1210A operate?
Mode-S A1210A has broadcast 1 distinct callsign, including N172EL.