Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

498494

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to 0556 · ZLIN Z-42/142/242

Hex
498494
Octal
22302224
Decimal
4,818,068
Country
CZ
Tail
0556
Type
Z42
No current signal · last broadcast Jul 22, 17:50 UTC
Flights observed
182
Distinct callsigns
20
Country
CZ
Last broadcast
Jul 22, 17:50 UTC

Last known position

Most recent position reported by Mode-S 498494.

Country allocation

The ICAO 24-bit address 498494 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 20 distinct

Callsign Airline Flights Last seen
BASIC13 - 20 2026-07-20
BASIC33 - 18 2026-07-02
BASIC23 - 15 2026-07-20
BASIC43 - 11 2026-07-02
BASIC11 - 11 2026-07-15
BASIC21 - 10 2026-07-15
BASIC53 - 9 2026-05-26
BASIC51 - 8 2026-07-09
BASIC41 - 8 2026-07-15
BASIC31 - 7 2026-07-15
BASIC73 - 6 2026-06-18
BASIC63 - 6 2026-07-02
BASIC61 - 5 2026-07-08
BASIC75 - 4 2026-06-16
BASIC65 - 4 2026-05-28
BASIC71 - 3 2026-06-02
BASIC55 - 3 2026-06-22
BASIC81 - 2 2026-05-28
BASIC57 - 2 2026-06-02
BASIC45 - 2 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 BABY51 PED → PED Jul 22, 15:25 UTCJul 22, 17:50 UTC2h 25m
2026-07-22 BABY41 - Jul 22, 12:35 UTCJul 22, 14:50 UTC2h 15m
2026-07-21 BABY59 PED → PED Jul 21, 15:40 UTCJul 21, 17:40 UTC2h 0m
2026-07-21 BABY39 - Jul 21, 13:10 UTCJul 21, 15:05 UTC1h 55m
2026-07-21 BASIC29 PED → PED Jul 21, 09:10 UTCJul 21, 10:15 UTC1h 5m
2026-07-21 BASIC19 - Jul 21, 07:25 UTCJul 21, 08:20 UTC55m
2026-07-20 BABY41 - Jul 20, 13:10 UTCJul 20, 18:40 UTC5h 30m
2026-07-20 BASIC23 PED → PED Jul 20, 09:50 UTCJul 20, 12:10 UTC2h 20m
2026-07-20 BASIC13 - Jul 20, 08:20 UTCJul 20, 09:15 UTC55m
2026-07-16 BABY35 - Jul 16, 11:05 UTCJul 16, 12:14 UTC1h 10m
2026-07-16 BABY23 - Jul 16, 09:35 UTCJul 16, 10:29 UTC55m
2026-07-16 BASIC13 - Jul 16, 07:40 UTCJul 16, 08:55 UTC1h 15m
2026-07-15 BASIC41 - Jul 15, 14:00 UTCJul 15, 15:25 UTC1h 25m
2026-07-15 BASIC31 - Jul 15, 11:10 UTCJul 15, 12:35 UTC1h 25m
2026-07-15 BASIC21 - Jul 15, 09:10 UTCJul 15, 10:35 UTC1h 25m
2026-07-15 BASIC11 PED → PED Jul 15, 07:35 UTCJul 15, 08:10 UTC35m
2026-07-14 BASIC31 - Jul 14, 11:50 UTCJul 14, 13:15 UTC1h 25m
2026-07-14 BASIC21 - Jul 14, 09:25 UTCJul 14, 10:50 UTC1h 25m
2026-07-14 BASIC11 - Jul 14, 07:25 UTCJul 14, 08:45 UTC1h 20m
2026-07-13 BABY43 - Jul 13, 15:40 UTCJul 13, 17:45 UTC2h 5m
2026-07-13 BABY37 - Jul 13, 12:55 UTCJul 13, 13:50 UTC55m
2026-07-13 BASIC11 - Jul 13, 10:25 UTCJul 13, 11:35 UTC1h 10m
2026-07-09 BASIC51 - Jul 9, 14:25 UTCJul 9, 17:50 UTC3h 25m
2026-07-09 BASIC31 PED → PED Jul 9, 12:25 UTCJul 9, 13:50 UTC1h 25m
2026-07-09 BASIC11 - Jul 9, 07:50 UTCJul 9, 09:30 UTC1h 40m
2026-07-08 BASIC61 - Jul 8, 16:25 UTCJul 8, 18:00 UTC1h 35m
2026-07-08 CEF850 - Jul 8, 13:15 UTCJul 8, 15:50 UTC2h 35m
2026-07-08 BASIC21 - Jul 8, 08:40 UTCJul 8, 09:35 UTC55m
2026-07-07 BASIC51 PED → PED Jul 7, 15:30 UTCJul 7, 18:05 UTC2h 35m
2026-07-07 BASIC41 PED → PED Jul 7, 13:55 UTCJul 7, 14:55 UTC1h 0m
2026-07-07 BASIC21 - Jul 7, 09:45 UTCJul 7, 10:55 UTC1h 10m
2026-07-07 BASIC13 - Jul 7, 08:05 UTCJul 7, 09:10 UTC1h 5m
2026-07-02 BASIC63 - Jul 2, 17:40 UTCJul 2, 18:35 UTC55m
2026-07-02 BASIC43 PED → PED Jul 2, 13:10 UTCJul 2, 17:10 UTC4h 0m
2026-07-02 BASIC33 PED → PED Jul 2, 11:00 UTCJul 2, 12:30 UTC1h 30m
2026-07-02 BASIC25 - Jul 2, 09:20 UTCJul 2, 10:25 UTC1h 5m
2026-07-02 BASIC15 PED → PED Jul 2, 07:20 UTCJul 2, 08:40 UTC1h 20m
2026-07-01 BASIC21 - Jul 1, 08:25 UTCJul 1, 09:15 UTC50m
2026-07-01 BASIC05 - Jul 1, 07:10 UTCJul 1, 07:45 UTC35m
2026-06-22 BASIC55 - Jun 22, 17:04 UTCJun 22, 18:04 UTC1h 0m
2026-06-22 BASIC45 - Jun 22, 14:59 UTCJun 22, 15:50 UTC50m
2026-06-22 BASIC33 - Jun 22, 11:35 UTCJun 22, 12:30 UTC55m
2026-06-22 BASIC21 - Jun 22, 09:45 UTCJun 22, 11:00 UTC1h 15m
2026-06-22 BASIC15 - Jun 22, 08:04 UTCJun 22, 09:00 UTC55m
2026-06-18 BASIC73 - Jun 18, 16:45 UTCJun 18, 18:00 UTC1h 15m
2026-06-18 BASIC43 PED → PED Jun 18, 11:20 UTCJun 18, 16:10 UTC4h 50m
2026-06-18 BASIC31 - Jun 18, 09:15 UTCJun 18, 10:45 UTC1h 30m
2026-06-18 BASIC11 PED → PED Jun 18, 07:10 UTCJun 18, 08:45 UTC1h 35m
2026-06-17 BASIC83 PED → PED Jun 17, 16:00 UTCJun 17, 19:00 UTC3h 0m
2026-06-17 BASIC61 - Jun 17, 12:55 UTCJun 17, 15:25 UTC2h 30m

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 0556 page for operator, model, and routing details .

Mode-S 498494 frequently asked

What is Mode-S code 498494?
498494 is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to 0556.
Where is Mode-S 498494 registered?
Mode-S code 498494 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 498494 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 17:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 498494, octal 22302224, decimal 4,818,068.
What flights does 498494 operate?
Mode-S 498494 has broadcast 20 distinct callsigns, including BASIC13, BASIC33, BASIC23, BASIC43, BASIC11.