sensors Mode-S transponder

505EC8

ICAO 24-bit transponder address · allocated to Slovakia

Currently assigned to OM-M383 · TOMARK Viper

Hex
505EC8
Octal
24057310
Decimal
5,267,144
Country
SK
Tail
OM-M383
Type
SD4
No current signal · last broadcast 19h ago
Flights observed
1
Distinct callsigns
1
Country
SK
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 505EC8.

Country allocation

The ICAO 24-bit address 505EC8 falls within the block assigned to Slovakia (SK) by ICAO Annex 10, Volume III. Every aircraft registered in Slovakia 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
OMW383 - 1 2026-04-14

Recent flights last 1

DateFlightRouteTakeoffLandingDuration
2026-04-14 OMW383 - Apr 14, 07:15 UTCApr 14, 08:45 UTC1h 30m

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 OM-M383 page for operator, model, and routing details .

Mode-S 505EC8 frequently asked

What is Mode-S code 505EC8?
505EC8 is an ICAO 24-bit transponder address. Allocated to Slovakia. Assigned to OM-M383.
Where is Mode-S 505EC8 registered?
Mode-S code 505EC8 is allocated to Slovakia (SK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 505EC8 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 505EC8, octal 24057310, decimal 5,267,144.
What flights does 505EC8 operate?
Mode-S 505EC8 has broadcast 1 distinct callsign, including OMW383.