Apparatus

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sensors Mode-S transponder

48E979

ICAO 24-bit transponder address · allocated to Poland

Hex
48E979
Octal
22164571
Decimal
4,778,361
Country
PL
No current signal · last broadcast 10d ago
Flights observed
4
Distinct callsigns
2
Country
PL
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S 48E979.

Country allocation

The ICAO 24-bit address 48E979 falls within the block assigned to Poland (PL) by ICAO Annex 10, Volume III. Every aircraft registered in Poland 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 2 distinct

Callsign Airline Flights Last seen
BOE123 - 2 2026-04-25
BOE113 - 1 2026-05-02

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-02 BOE113 RNT → BFI May 2, 16:20 UTCMay 2, 18:30 UTC2h 10m
2026-04-27 - RNT → RNT Apr 27, 10:50 UTCApr 27, 11:00 UTC10m
2026-04-25 BOE123 RNT → RNT Apr 25, 03:10 UTCApr 25, 03:35 UTC25m
2026-04-25 BOE123 RNT → RNT Apr 25, 02:25 UTCApr 25, 03:05 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.

Mode-S 48E979 frequently asked

What is Mode-S code 48E979?
48E979 is an ICAO 24-bit transponder address. Allocated to Poland.
Where is Mode-S 48E979 registered?
Mode-S code 48E979 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48E979 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48E979, octal 22164571, decimal 4,778,361.
What flights does 48E979 operate?
Mode-S 48E979 has broadcast 2 distinct callsigns, including BOE123, BOE113.