Apparatus

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sensors Mode-S transponder

505CEA

ICAO 24-bit transponder address · allocated to Slovakia

Currently assigned to OM-GTJ · BOEING 737-800

Hex
505CEA
Octal
24056352
Decimal
5,266,666
Country
SK
Tail
OM-GTJ
Type
B738
Broadcasting now · callsign SQY4004 · 6,200 ft
Flights observed
241
Distinct callsigns
20
Country
SK
Last broadcast
9d ago

Current position

505CEA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 505CEA 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 20 distinct

Callsign Airline Flights Last seen
SQY8312 - 15 2026-07-22
HYM312 - 12 2026-06-01
SQY4002 - 10 2026-07-21
HYM346 Himalayan Airlines 9 2026-06-08
SQY4001 - 8 2026-07-24
HYM316 - 8 2026-05-31
SQY5786 - 7 2026-07-26
SQY5782 - 7 2026-07-24
SQY4018 - 7 2026-07-26
SEU304 XL Airways France 7 2026-06-18
HYM311 - 7 2026-06-01
SEU302 - 6 2026-07-19
HYM345 - 6 2026-05-29
SQY5781 - 5 2026-07-24
SQY4017 - 5 2026-07-25
SEU303 XL Airways France 5 2026-06-17
SEU301 XL Airways France 5 2026-06-11
HYM317 - 5 2026-05-27
HYM315 - 5 2026-05-30
SQY8311 - 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SQY5786 - Jul 26, 09:45 UTCJul 26, 22:30 UTC12h 45m
2026-07-26 SQY4018 - Jul 26, 00:45 UTCJul 26, 02:10 UTC1h 25m
2026-07-25 SQY4017 - Jul 25, 22:10 UTCJul 25, 23:00 UTC50m
2026-07-25 SQY8311 - Jul 25, 00:45 UTCJul 25, 14:45 UTC14h 0m
2026-07-24 SQY4001 - Jul 24, 23:00 UTCJul 24, 23:15 UTC15m
2026-07-24 SQY5782 - Jul 24, 10:50 UTCJul 24, 12:05 UTC1h 15m
2026-07-24 SQY5781 - Jul 24, 07:50 UTCJul 24, 09:00 UTC1h 10m
2026-07-23 SQY8310 - Jul 23, 22:15 UTCJul 24, 04:30 UTC6h 15m
2026-07-23 SQY7507 - Jul 23, 06:10 UTCJul 23, 13:15 UTC7h 5m
2026-07-23 SQY9202 - Jul 23, 01:50 UTCJul 23, 03:35 UTC1h 45m
2026-07-22 SQY8312 - Jul 22, 11:15 UTCJul 23, 00:00 UTC12h 45m
2026-07-22 SQY8312 - Jul 22, 02:35 UTCJul 23, 00:00 UTC21h 25m
2026-07-22 SQY7502 - Jul 22, 02:00 UTCJul 23, 00:00 UTC22h 0m
2026-07-21 SQY7501 - Jul 21, 22:30 UTCJul 22, 00:05 UTC1h 35m
2026-07-21 SQY5786 - Jul 21, 16:20 UTCJul 21, 17:25 UTC1h 5m
2026-07-21 SQY5228 - Jul 21, 09:25 UTCJul 21, 14:55 UTC5h 30m
2026-07-21 SQY5227 - Jul 21, 05:55 UTCJul 21, 07:05 UTC1h 10m
2026-07-21 SQY4002 - Jul 21, 00:50 UTCJul 21, 02:10 UTC1h 20m
2026-07-20 SQY4001 - Jul 20, 22:15 UTCJul 20, 23:05 UTC50m
2026-07-20 SQY7502 - Jul 20, 01:50 UTCJul 20, 13:45 UTC11h 55m
2026-07-19 SQY7501 - Jul 19, 12:20 UTCJul 20, 00:00 UTC11h 40m
2026-07-19 SEU302 - Jul 19, 00:35 UTCJul 20, 00:00 UTC23h 25m
2026-07-18 SQY8312 - Jul 18, 06:45 UTCJul 18, 23:05 UTC16h 20m
2026-07-18 SQY8312 - Jul 18, 00:35 UTCJul 18, 23:05 UTC22h 31m
2026-07-18 SQY8312 - Jul 18, 00:29 UTCJul 18, 22:30 UTC22h 1m
2026-07-17 SQY4001 - Jul 17, 22:40 UTCJul 17, 23:00 UTC20m
2026-07-17 SQY5782 - Jul 17, 10:25 UTCJul 17, 11:30 UTC1h 5m
2026-07-17 SQY4018 - Jul 17, 00:50 UTCJul 17, 08:54 UTC8h 5m
2026-07-16 SQY4017 - Jul 16, 22:15 UTCJul 16, 22:59 UTC45m
2026-07-16 SEU534 - Jul 16, 15:05 UTCJul 16, 17:05 UTC2h 0m
2026-07-16 SEU533 - Jul 16, 13:00 UTCJul 16, 13:30 UTC30m
2026-07-16 SEU322 - Jul 16, 08:50 UTCJul 16, 09:55 UTC1h 5m
2026-07-16 SEU321 - Jul 16, 06:15 UTCJul 16, 07:20 UTC1h 5m
2026-07-16 SQY4002 - Jul 16, 00:40 UTCJul 16, 02:10 UTC1h 30m
2026-07-15 SQY8312 - Jul 15, 07:40 UTCJul 15, 23:10 UTC15h 30m
2026-07-15 SQY8312 - Jul 15, 00:40 UTCJul 15, 23:10 UTC22h 30m
2026-07-14 SQY4003 - Jul 14, 21:50 UTCJul 14, 23:20 UTC1h 29m
2026-07-14 SQY5786 - Jul 14, 16:50 UTCJul 14, 18:00 UTC1h 10m
2026-07-14 SEU534 - Jul 14, 10:25 UTCJul 14, 15:05 UTC4h 40m
2026-07-14 SEU533 - Jul 14, 07:25 UTCJul 14, 09:20 UTC1h 55m
2026-07-14 SQY4002 - Jul 14, 00:40 UTCJul 14, 02:00 UTC1h 20m
2026-07-13 SQY8312 - Jul 13, 06:40 UTCJul 13, 23:10 UTC16h 30m
2026-07-13 SQY8312 - Jul 13, 00:50 UTCJul 13, 23:10 UTC22h 20m
2026-07-12 SQY5786 - Jul 12, 12:25 UTCJul 12, 13:30 UTC1h 5m
2026-07-12 SQY5785 - Jul 12, 09:40 UTCJul 12, 10:45 UTC1h 5m
2026-07-12 SQY9202 - Jul 12, 01:45 UTCJul 12, 03:30 UTC1h 45m
2026-07-12 SQY9202 - Jul 12, 01:15 UTCJul 12, 01:40 UTC25m
2026-07-11 SQY8312 - Jul 11, 11:05 UTCJul 11, 23:55 UTC12h 50m
2026-07-11 SQY4002 - Jul 11, 00:45 UTCJul 11, 02:10 UTC1h 25m
2026-07-10 SQY5782 - Jul 10, 10:30 UTCJul 10, 23:15 UTC12h 46m

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-GTJ page for operator, model, and routing details .

Mode-S 505CEA frequently asked

What is Mode-S code 505CEA?
505CEA is an ICAO 24-bit transponder address. Allocated to Slovakia. Assigned to OM-GTJ.
Where is Mode-S 505CEA registered?
Mode-S code 505CEA is allocated to Slovakia (SK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 505CEA broadcasting right now?
Yes. Mode-S 505CEA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 505CEA, octal 24056352, decimal 5,266,666.
What flights does 505CEA operate?
Mode-S 505CEA has broadcast 20 distinct callsigns, including SQY8312, HYM312, SQY4002, HYM346, SQY4001.