sensors Mode-S transponder

46BC51

ICAO 24-bit transponder address · allocated to Greece

Currently assigned to SX-OBQ · ATR-72-600

Hex
46BC51
Octal
21536121
Decimal
4,635,729
Country
GR
Tail
SX-OBQ
Type
AT76
No current signal · last broadcast 15h ago
Flights observed
16
Distinct callsigns
14
Country
GR
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 46BC51.

Country allocation

The ICAO 24-bit address 46BC51 falls within the block assigned to Greece (GR) by ICAO Annex 10, Volume III. Every aircraft registered in Greece 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 14 distinct

Callsign Airline Flights Last seen
OAL8NJ - 2 2026-04-13
AEE3GS - 2 2026-04-14
OAL9NJ - 1 2026-04-13
OAL075 - 1 2026-04-13
OAL074 - 1 2026-04-13
OAL069 - 1 2026-04-13
OAL068 - 1 2026-04-13
AEE5GS - 1 2026-04-14
AEE2MJ - 1 2026-04-13
AEE2GS - 1 2026-04-14
AEE253 - 1 2026-04-13
AEE241 - 1 2026-04-13
AEE240 Aegean Airlines 1 2026-04-13
AEE224 - 1 2026-04-14

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-04-14 AEE5GS - Apr 14, 10:35 UTCApr 14, 11:05 UTC30m
2026-04-14 AEE224 - Apr 14, 09:10 UTCApr 14, 09:50 UTC40m
2026-04-14 AEE3GS - Apr 14, 07:10 UTCApr 14, 07:25 UTC15m
2026-04-14 AEE3GS - Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-14 AEE2GS - Apr 14, 05:15 UTCApr 14, 05:40 UTC25m
2026-04-13 OAL9NJ - Apr 13, 16:45 UTCApr 13, 17:15 UTC30m
2026-04-13 OAL8NJ - Apr 13, 15:50 UTCApr 13, 16:05 UTC15m
2026-04-13 OAL8NJ - Apr 13, 15:35 UTCApr 13, 16:05 UTC30m
2026-04-13 OAL075 - Apr 13, 14:15 UTCApr 13, 14:40 UTC25m
2026-04-13 OAL074 - Apr 13, 13:00 UTCApr 13, 13:25 UTC25m
2026-04-13 OAL069 - Apr 13, 11:20 UTCApr 13, 11:40 UTC20m
2026-04-13 OAL068 - Apr 13, 10:00 UTCApr 13, 10:25 UTC25m
2026-04-13 AEE253 - Apr 13, 08:20 UTCApr 13, 09:10 UTC50m
2026-04-13 AEE2MJ - Apr 13, 06:55 UTCApr 13, 07:30 UTC35m
2026-04-13 AEE241 - Apr 13, 05:00 UTCApr 13, 05:40 UTC40m
2026-04-13 AEE240 ATH → SMI Apr 13, 03:30 UTCApr 13, 04:00 UTC30m

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 SX-OBQ page for operator, model, and routing details .

Mode-S 46BC51 frequently asked

What is Mode-S code 46BC51?
46BC51 is an ICAO 24-bit transponder address. Allocated to Greece. Assigned to SX-OBQ.
Where is Mode-S 46BC51 registered?
Mode-S code 46BC51 is allocated to Greece (GR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 46BC51 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 46BC51, octal 21536121, decimal 4,635,729.
What flights does 46BC51 operate?
Mode-S 46BC51 has broadcast 14 distinct callsigns, including OAL8NJ, AEE3GS, OAL9NJ, OAL075, OAL074.