sensors Mode-S transponder

A70DB0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N55350 · CESSNA 172 Skyhawk · operated by HAPS AIR INC

Hex
A70DB0
Octal
51606660
Decimal
10,948,016
Country
US
Tail
N55350
Type
C172
Broadcasting now · callsign N55350 · 2,050 ft
Flights observed
5
Distinct callsigns
1
Country
US
Last broadcast
23h ago

Current position

A70DB0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A70DB0 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
N55350 - 5 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 N55350 AMW → AMW Apr 13, 22:55 UTCApr 13, 23:40 UTC45m
2026-04-13 N55350 - Apr 13, 20:40 UTCApr 13, 20:50 UTC10m
2026-04-13 N55350 - Apr 13, 18:30 UTCApr 13, 19:35 UTC1h 5m
2026-04-13 N55350 AMW → AMW Apr 13, 16:15 UTCApr 13, 17:35 UTC1h 20m
2026-04-13 N55350 AMW → AMW Apr 13, 14:25 UTCApr 13, 14:50 UTC25m

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 N55350 page for operator, model, and routing details .

Mode-S A70DB0 frequently asked

What is Mode-S code A70DB0?
A70DB0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N55350.
Where is Mode-S A70DB0 registered?
Mode-S code A70DB0 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 A70DB0 broadcasting right now?
Yes. Mode-S A70DB0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A70DB0, octal 51606660, decimal 10,948,016.
What flights does A70DB0 operate?
Mode-S A70DB0 has broadcast 1 distinct callsign, including N55350.