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
No current signal · last broadcast 8h ago
Flights observed
129
Distinct callsigns
20
Country
SK
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 505CEA.

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
HYM312 - 12 2026-06-01
HYM346 Himalayan Airlines 9 2026-06-08
HYM316 - 8 2026-05-31
SEU304 XL Airways France 7 2026-06-18
HYM311 - 7 2026-06-01
HYM345 - 6 2026-05-29
SEU303 XL Airways France 5 2026-06-17
SEU302 XL Airways France 5 2026-06-12
SEU301 XL Airways France 5 2026-06-11
HYM317 - 5 2026-05-27
HYM315 - 5 2026-05-30
HYM412 Himalayan Airlines 4 2026-05-31
HYM411 Himalayan Airlines 4 2026-05-31
HYS474 HiSky Europe 3 2026-05-24
HYS473 HiSky Europe 3 2026-05-24
HYM318 - 3 2026-05-26
SQY5782 - 2 2026-06-19
SQY5781 - 2 2026-06-19
SQY4018 - 2 2026-06-19
SQY4002 - 2 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-20 SQY8312 - Jun 20, 06:45 UTCJun 20, 13:34 UTC6h 50m
2026-06-20 SQY4002 - Jun 20, 00:49 UTCJun 20, 02:14 UTC1h 25m
2026-06-19 SQY4001 - Jun 19, 22:30 UTCJun 19, 23:14 UTC45m
2026-06-19 SQY5782 - Jun 19, 10:29 UTCJun 19, 11:45 UTC1h 15m
2026-06-19 SQY5781 - Jun 19, 08:09 UTCJun 19, 08:59 UTC50m
2026-06-19 SQY4018 - Jun 19, 00:40 UTCJun 19, 02:04 UTC1h 25m
2026-06-18 SQY4017 - Jun 18, 21:55 UTCJun 18, 23:20 UTC1h 25m
2026-06-18 SEU304 HER → RMO Jun 18, 00:45 UTCJun 18, 02:20 UTC1h 35m
2026-06-17 SEU303 RMO → HER Jun 17, 22:50 UTCJun 17, 23:20 UTC30m
2026-06-17 SEU426 PMI → RMO Jun 17, 17:05 UTCJun 17, 20:00 UTC2h 55m
2026-06-17 SEU425 RMO → PMI Jun 17, 12:30 UTCJun 17, 15:10 UTC2h 40m
2026-06-16 SEU304 HER → RMO Jun 16, 00:55 UTCJun 16, 02:29 UTC1h 35m
2026-06-15 SEU303 RMO → HER Jun 15, 22:05 UTCJun 15, 23:25 UTC1h 20m
2026-06-15 SQY4004 - Jun 15, 00:49 UTCJun 15, 02:15 UTC1h 25m
2026-06-14 SQY5786 - Jun 14, 12:10 UTCJun 14, 13:15 UTC1h 5m
2026-06-14 SQY5785 - Jun 14, 09:40 UTCJun 14, 10:35 UTC55m
2026-06-14 SQY4018 - Jun 14, 01:10 UTCJun 14, 02:30 UTC1h 20m
2026-06-13 SQY8311 - Jun 13, 06:10 UTCJun 13, 13:50 UTC7h 40m
2026-06-13 SQY4002 - Jun 13, 00:55 UTCJun 13, 02:15 UTC1h 20m
2026-06-12 SQY5782 - Jun 12, 10:45 UTCJun 12, 12:00 UTC1h 15m
2026-06-12 SQY5781 - Jun 12, 08:20 UTCJun 12, 09:10 UTC50m
2026-06-12 SEU302 HER → RMO Jun 12, 00:45 UTCJun 12, 02:20 UTC1h 35m
2026-06-11 SEU301 RMO → HER Jun 11, 22:15 UTCJun 11, 23:05 UTC50m
2026-06-11 SEU304 HER → RMO Jun 11, 00:35 UTCJun 11, 02:15 UTC1h 40m
2026-06-10 SEU303 RMO → HER Jun 10, 21:40 UTCJun 10, 23:00 UTC1h 20m
2026-06-10 SEU302 HER → RMO Jun 10, 01:05 UTCJun 10, 02:45 UTC1h 40m
2026-06-09 SEU301 RMO → HER Jun 9, 22:10 UTCJun 9, 23:30 UTC1h 20m
2026-06-09 SEU304 HER → RMO Jun 9, 04:00 UTCJun 9, 05:40 UTC1h 40m
2026-06-08 HYM402 FRA → RMO Jun 8, 16:20 UTCJun 9, 02:30 UTC10h 10m
2026-06-08 HYM346 SSH → RMO Jun 8, 05:20 UTCJun 8, 15:00 UTC9h 40m
2026-06-08 SEU306 HER → RMO Jun 8, 01:20 UTCJun 8, 03:00 UTC1h 40m
2026-06-07 SEU305 RMO → HER Jun 7, 22:25 UTCJun 7, 23:45 UTC1h 20m
2026-06-07 HYM348 HRG → RMO Jun 7, 04:15 UTCJun 7, 11:35 UTC7h 20m
2026-06-07 SEU302 HER → RMO Jun 7, 00:34 UTCJun 7, 02:14 UTC1h 40m
2026-06-06 SEU301 RMO → HER Jun 6, 22:15 UTCJun 6, 23:00 UTC45m
2026-06-06 HYM346 SSH → RMO Jun 6, 08:20 UTCJun 6, 10:55 UTC2h 35m
2026-06-06 SEU304 HER → RMO Jun 6, 01:00 UTCJun 6, 02:30 UTC1h 30m
2026-06-05 SEU303 RMO → HER Jun 5, 23:15 UTCJun 5, 23:35 UTC20m
2026-06-05 SEU302 HER → RMO Jun 5, 00:45 UTCJun 5, 02:25 UTC1h 40m
2026-06-04 SEU301 RMO → HER Jun 4, 22:15 UTCJun 4, 23:10 UTC55m
2026-06-04 SEU304 HER → RMO Jun 4, 00:55 UTCJun 4, 02:25 UTC1h 30m
2026-06-03 SEU303 RMO → HER Jun 3, 22:20 UTCJun 3, 23:30 UTC1h 10m
2026-06-03 SEU302 HER → RMO Jun 3, 01:00 UTCJun 3, 02:40 UTC1h 40m
2026-06-02 SEU301 RMO → HER Jun 2, 22:20 UTCJun 2, 23:25 UTC1h 5m
2026-06-02 SEU304 HER → RMO Jun 2, 00:40 UTCJun 2, 02:20 UTC1h 40m
2026-06-01 HYM312 - Jun 1, 10:40 UTCJun 1, 23:05 UTC12h 25m
2026-06-01 HYM311 - Jun 1, 08:10 UTCJun 1, 09:35 UTC1h 25m
2026-06-01 HYS482 OTP → RMO Jun 1, 06:20 UTCJun 1, 06:45 UTC25m
2026-06-01 HYS481 RMO → OTP Jun 1, 04:35 UTCJun 1, 05:00 UTC25m
2026-06-01 SEU306 HER → RMO Jun 1, 01:25 UTCJun 1, 03:05 UTC1h 40m

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?
No active broadcast right now. Last signal was 8h ago.
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 HYM312, HYM346, HYM316, SEU304, HYM311.