Apparatus

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sensors Mode-S transponder

500108

ICAO 24-bit transponder address · allocated to San Marino

Currently assigned to T7-SLA · BOMBARDIER Regional Jet CRJ-200

Hex
500108
Octal
24000410
Decimal
5,243,144
Country
SM
Tail
T7-SLA
Type
CRJ2
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
1
Country
SM
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 500108.

Country allocation

The ICAO 24-bit address 500108 falls within the block assigned to San Marino (SM) by ICAO Annex 10, Volume III. Every aircraft registered in San Marino 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
T7SLA - 5 2026-04-17

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-17 T7SLA - Apr 17, 21:25 UTCApr 17, 23:15 UTC1h 50m
2026-04-17 T7SLA - Apr 17, 19:45 UTCApr 17, 21:20 UTC1h 35m
2026-04-17 T7SLA - Apr 17, 17:25 UTCApr 17, 18:10 UTC45m
2026-04-17 T7SLA - Apr 17, 15:20 UTCApr 17, 17:15 UTC1h 55m
2026-04-17 T7SLA - Apr 17, 14:15 UTCApr 17, 15:15 UTC59m

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 T7-SLA page for operator, model, and routing details .

Mode-S 500108 frequently asked

What is Mode-S code 500108?
500108 is an ICAO 24-bit transponder address. Allocated to San Marino. Assigned to T7-SLA.
Where is Mode-S 500108 registered?
Mode-S code 500108 is allocated to San Marino (SM). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 500108 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 500108, octal 24000410, decimal 5,243,144.
What flights does 500108 operate?
Mode-S 500108 has broadcast 1 distinct callsign, including T7SLA.