Apparatus

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sensors Mode-S transponder

498B22

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to OK-BYB · AIRBUS HELICOPTERS EC-135/635

Hex
498B22
Octal
22305442
Decimal
4,819,746
Country
CZ
Tail
OK-BYB
Type
EC35
No current signal · last broadcast 16h ago
Flights observed
86
Distinct callsigns
3
Country
CZ
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 498B22.

Country allocation

The ICAO 24-bit address 498B22 falls within the block assigned to Czech Republic (CZ) by ICAO Annex 10, Volume III. Every aircraft registered in Czech Republic 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 3 distinct

Callsign Airline Flights Last seen
KR01 - 77 2026-06-22
OKBYB - 6 2026-05-27
K01 - 3 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 KR01 - Jun 22, 18:09 UTCJun 22, 19:19 UTC1h 10m
2026-06-22 KR01 PRG → PRG Jun 22, 15:05 UTCJun 22, 15:29 UTC25m
2026-06-22 KR01 - Jun 22, 10:44 UTCJun 22, 11:54 UTC1h 10m
2026-06-22 KR01 - Jun 22, 04:44 UTCJun 22, 05:15 UTC30m
2026-06-21 KR01 - Jun 21, 19:09 UTCJun 21, 20:29 UTC1h 20m
2026-06-21 KR01 - Jun 21, 18:20 UTCJun 21, 18:29 UTC10m
2026-06-21 KR01 - Jun 21, 15:25 UTCJun 21, 16:49 UTC1h 25m
2026-06-21 KR01 - Jun 21, 14:30 UTCJun 21, 14:50 UTC20m
2026-06-21 KR01 - Jun 21, 13:39 UTCJun 21, 13:54 UTC15m
2026-06-21 KR01 - Jun 21, 10:14 UTCJun 21, 11:00 UTC45m
2026-06-21 KR01 - Jun 21, 08:49 UTCJun 21, 09:20 UTC30m
2026-06-21 KR01 - Jun 21, 05:25 UTCJun 21, 05:40 UTC15m
2026-06-20 KR01 - Jun 20, 23:29 UTCJun 21, 00:10 UTC40m
2026-06-20 KR01 - Jun 20, 16:09 UTCJun 20, 16:55 UTC45m
2026-06-20 KR01 - Jun 20, 11:49 UTCJun 20, 12:19 UTC30m
2026-06-20 KR01 - Jun 20, 01:24 UTCJun 20, 02:24 UTC1h 0m
2026-06-19 KR01 - Jun 19, 22:24 UTCJun 19, 23:39 UTC1h 15m
2026-06-19 KR01 - Jun 19, 14:09 UTCJun 19, 14:15 UTC5m
2026-06-19 KR01 - Jun 19, 08:09 UTCJun 19, 08:40 UTC30m
2026-06-18 KR01 - Jun 18, 19:00 UTCJun 18, 19:25 UTC25m
2026-06-18 KR01 - Jun 18, 15:45 UTCJun 18, 16:00 UTC15m
2026-06-18 KR01 - Jun 18, 15:00 UTCJun 18, 15:10 UTC10m
2026-06-18 KR01 - Jun 18, 12:40 UTCJun 18, 13:20 UTC40m
2026-06-17 KR01 PRG → PRG Jun 17, 21:50 UTCJun 17, 23:30 UTC1h 40m
2026-06-17 KR01 - Jun 17, 19:45 UTCJun 17, 20:30 UTC45m
2026-06-16 KR01 - Jun 16, 11:45 UTCJun 16, 12:00 UTC15m
2026-06-16 KR01 - Jun 16, 10:45 UTCJun 16, 11:00 UTC15m
2026-06-16 KR01 - Jun 16, 09:55 UTCJun 16, 10:04 UTC10m
2026-06-15 KR01 - Jun 15, 06:15 UTCJun 15, 07:00 UTC45m
2026-06-15 KR01 VOD → PRG Jun 15, 00:20 UTCJun 15, 02:10 UTC1h 50m
2026-06-14 KR01 - Jun 14, 15:50 UTCJun 14, 16:35 UTC45m
2026-06-14 KR01 - Jun 14, 11:45 UTCJun 14, 12:05 UTC20m
2026-06-14 KR01 - Jun 14, 10:40 UTCJun 14, 10:55 UTC15m
2026-06-13 KR01 - Jun 13, 18:25 UTCJun 13, 18:50 UTC25m
2026-06-12 KR01 PRG → PRG Jun 12, 14:01 UTCJun 12, 14:30 UTC30m
2026-06-12 KR01 - Jun 12, 12:15 UTCJun 12, 12:25 UTC10m
2026-06-12 KR01 - Jun 12, 11:15 UTCJun 12, 11:30 UTC15m
2026-06-12 KR01 - Jun 12, 06:00 UTCJun 12, 07:10 UTC1h 10m
2026-06-11 KR01 - Jun 11, 10:15 UTCJun 11, 11:15 UTC1h 0m
2026-06-10 KR01 - Jun 10, 16:55 UTCJun 10, 17:35 UTC40m
2026-06-10 KR01 - Jun 10, 08:50 UTCJun 10, 09:30 UTC40m
2026-06-10 KR01 - Jun 10, 05:25 UTCJun 10, 05:40 UTC15m
2026-06-09 KR01 - Jun 9, 18:15 UTCJun 9, 18:25 UTC10m
2026-06-09 KR01 - Jun 9, 16:45 UTCJun 9, 17:30 UTC45m
2026-06-09 KR01 - Jun 9, 05:30 UTCJun 9, 05:40 UTC10m
2026-06-09 KR01 - Jun 9, 04:25 UTCJun 9, 04:55 UTC30m
2026-06-08 KR01 - Jun 8, 18:50 UTCJun 8, 20:20 UTC1h 30m
2026-06-08 KR01 - Jun 8, 15:04 UTCJun 8, 16:10 UTC1h 5m
2026-06-07 KR01 - Jun 7, 18:40 UTCJun 7, 19:15 UTC35m
2026-06-07 KR01 - Jun 7, 15:00 UTCJun 7, 15:35 UTC35m

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 OK-BYB page for operator, model, and routing details .

Mode-S 498B22 frequently asked

What is Mode-S code 498B22?
498B22 is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to OK-BYB.
Where is Mode-S 498B22 registered?
Mode-S code 498B22 is allocated to Czech Republic (CZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 498B22 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 498B22, octal 22305442, decimal 4,819,746.
What flights does 498B22 operate?
Mode-S 498B22 has broadcast 3 distinct callsigns, including KR01, OKBYB, K01.