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sensors Mode-S transponder

A1A70A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N20503 · CESSNA 172 Skyhawk · operated by VYATKIN DENIS

Hex
A1A70A
Octal
50323412
Decimal
10,594,058
Country
US
Tail
N20503
Type
C172
No current signal · last broadcast Jul 25, 04:40 UTC
Flights observed
182
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 04:40 UTC

Last known position

Most recent position reported by Mode-S A1A70A.

Country allocation

The ICAO 24-bit address A1A70A 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
N20503 - 182 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N20503 MCC → MCC Jul 25, 04:25 UTCJul 25, 04:35 UTC10m
2026-07-24 N20503 MCC → MCC Jul 24, 23:40 UTCJul 25, 02:10 UTC2h 30m
2026-07-24 N20503 MCC → MCC Jul 24, 00:20 UTCJul 24, 01:45 UTC1h 25m
2026-07-23 N20503 MCC → MCC Jul 23, 17:00 UTCJul 23, 18:30 UTC1h 30m
2026-07-22 N20503 MCC → MCC Jul 22, 21:20 UTCJul 22, 23:50 UTC2h 30m
2026-07-21 N20503 - Jul 21, 23:40 UTCJul 21, 23:55 UTC15m
2026-07-21 N20503 - Jul 21, 21:50 UTCJul 21, 23:10 UTC1h 20m
2026-07-21 N20503 MCC → MCC Jul 21, 16:20 UTCJul 21, 17:40 UTC1h 20m
2026-07-19 N20503 CCR → MCC Jul 19, 23:50 UTCJul 20, 00:25 UTC35m
2026-07-19 N20503 CCR → CCR Jul 19, 19:30 UTCJul 19, 20:25 UTC55m
2026-07-18 N20503 MCC → CCR Jul 18, 23:05 UTCJul 19, 00:30 UTC1h 25m
2026-07-18 N20503 MCC → MCC Jul 18, 17:05 UTCJul 18, 18:00 UTC55m
2026-07-16 N20503 MCC → MCC Jul 16, 14:55 UTCJul 16, 15:40 UTC45m
2026-07-14 N20503 MCC → MCC Jul 14, 16:40 UTCJul 14, 17:50 UTC1h 10m
2026-07-14 N20503 MCC → MCC Jul 14, 14:40 UTCJul 14, 15:50 UTC1h 10m
2026-07-14 N20503 MCC → MCC Jul 14, 02:15 UTCJul 14, 03:50 UTC1h 35m
2026-07-14 N20503 CCR → MCC Jul 14, 00:25 UTCJul 14, 01:20 UTC55m
2026-07-13 N20503 - Jul 13, 18:00 UTCJul 13, 19:25 UTC1h 25m
2026-07-13 N20503 MCC → CCR Jul 13, 01:01 UTCJul 13, 02:40 UTC1h 40m
2026-07-12 N20503 MCC → MCC Jul 12, 02:05 UTCJul 12, 04:15 UTC2h 10m
2026-07-11 N20503 MCC → MCC Jul 11, 16:15 UTCJul 11, 17:25 UTC1h 10m
2026-07-11 N20503 MCC → MCC Jul 11, 14:25 UTCJul 11, 15:10 UTC45m
2026-07-11 N20503 MCC → MCC Jul 11, 04:35 UTCJul 11, 04:55 UTC20m
2026-07-10 N20503 MCC → MCC Jul 10, 18:25 UTCJul 10, 19:55 UTC1h 30m
2026-07-03 N20503 MCC → MCC Jul 3, 00:00 UTCJul 3, 01:05 UTC1h 5m
2026-07-01 N20503 MCC → MCC Jul 1, 21:05 UTCJul 1, 22:30 UTC1h 25m
2026-07-01 N20503 MCC → MCC Jul 1, 18:30 UTCJul 1, 20:30 UTC2h 0m
2026-06-30 N20503 - Jun 30, 19:45 UTCJun 30, 20:50 UTC1h 5m
2026-06-30 N20503 - Jun 30, 16:30 UTCJun 30, 18:10 UTC1h 40m
2026-06-30 N20503 MCC → MCC Jun 30, 03:35 UTCJun 30, 05:35 UTC2h 0m
2026-06-30 N20503 MCC → MCC Jun 30, 00:45 UTCJun 30, 02:05 UTC1h 21m
2026-06-27 N20503 MCC → MCC Jun 27, 16:20 UTCJun 27, 17:49 UTC1h 30m
2026-06-26 N20503 - Jun 26, 18:49 UTCJun 26, 20:29 UTC1h 40m
2026-06-26 N20503 - Jun 26, 15:20 UTCJun 26, 17:40 UTC2h 20m
2026-06-25 N20503 MCC → MCC Jun 25, 16:14 UTCJun 25, 18:59 UTC2h 45m
2026-06-25 N20503 MCC → MCC Jun 25, 03:29 UTCJun 25, 04:20 UTC50m
2026-06-25 N20503 MCC → MCC Jun 25, 01:24 UTCJun 25, 02:49 UTC1h 25m
2026-06-24 N20503 MCC → MCC Jun 24, 18:09 UTCJun 24, 20:20 UTC2h 10m
2026-06-24 N20503 MCC → MCC Jun 24, 04:10 UTCJun 24, 07:30 UTC3h 20m
2026-06-23 N20503 MCC → MCC Jun 23, 23:59 UTCJun 24, 02:15 UTC2h 15m
2026-06-23 N20503 MCC → MCC Jun 23, 17:04 UTCJun 23, 18:34 UTC1h 30m
2026-06-23 N20503 CIC → MCC Jun 23, 02:04 UTCJun 23, 03:49 UTC1h 45m
2026-06-23 N20503 - Jun 23, 00:45 UTCJun 23, 01:00 UTC15m
2026-06-22 N20503 MCC → RBL Jun 22, 22:19 UTCJun 23, 00:09 UTC1h 50m
2026-06-20 N20503 MCC → MCC Jun 20, 16:34 UTCJun 20, 17:29 UTC55m
2026-06-20 N20503 MYV → MCC Jun 20, 00:49 UTCJun 20, 01:14 UTC25m
2026-06-18 N20503 MCC → MYV Jun 18, 16:20 UTCJun 18, 17:05 UTC45m
2026-06-17 N20503 MCC → MCC Jun 17, 20:15 UTCJun 17, 21:15 UTC1h 0m
2026-06-17 N20503 MCC → MCC Jun 17, 01:40 UTCJun 17, 03:05 UTC1h 25m
2026-06-16 N20503 - Jun 16, 18:39 UTCJun 16, 19:19 UTC40m

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 N20503 page for operator, model, and routing details .

Mode-S A1A70A frequently asked

What is Mode-S code A1A70A?
A1A70A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N20503.
Where is Mode-S A1A70A registered?
Mode-S code A1A70A 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 A1A70A broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 04:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A70A, octal 50323412, decimal 10,594,058.
What flights does A1A70A operate?
Mode-S A1A70A has broadcast 1 distinct callsign, including N20503.