Apparatus

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sensors Mode-S transponder

49D420

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to OK-SWK · BOEING 737 MAX 8

Hex
49D420
Octal
22352040
Decimal
4,838,432
Country
CZ
Tail
OK-SWK
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
128
Distinct callsigns
20
Country
CZ
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 49D420.

Country allocation

The ICAO 24-bit address 49D420 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
TVS4ZA Smart Wings 3 2026-05-02
TVS2QZ - 3 2026-05-02
TVL5170 - 3 2026-05-27
TVS86U Smart Wings 2 2026-05-01
TVS7PU Smart Wings 2 2026-06-08
TVS6N7 Smart Wings 2 2026-05-07
TVS53B Smart Wings 2 2026-05-11
TVS52A Smart Wings 2 2026-05-11
TVS4408 Smart Wings 2 2026-05-24
TVS431P Smart Wings 2 2026-05-17
TVS431F Smart Wings 2 2026-05-17
TVS4314 Smart Wings 2 2026-05-12
TVS2VM Smart Wings 2 2026-05-01
TVS2DZ Smart Wings 2 2026-04-17
TVQ6648 Smart Wings 2 2026-06-01
TVL5437 Travel Service 2 2026-05-29
TVL5436 Travel Service 2 2026-05-29
TVS9LN Smart Wings 1 2026-05-22
TVS8PU - 1 2026-05-28
TVS8KQ Smart Wings 1 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-08 TVS7PU BRQ → CFU Jun 8, 17:20 UTCJun 8, 18:00 UTC40m
2026-06-08 TVS6DG BOJ → PRG Jun 8, 14:05 UTCJun 8, 15:45 UTC1h 40m
2026-06-08 TVS5DG PRG → BOJ Jun 8, 11:05 UTCJun 8, 12:45 UTC1h 40m
2026-06-08 TVS448F VIE → BRQ Jun 8, 09:35 UTCJun 8, 09:55 UTC20m
2026-06-08 TVS4406 FMO → FMO Jun 8, 07:20 UTCJun 8, 08:20 UTC1h 0m
2026-06-08 TVS447P BTS → PMI Jun 8, 04:50 UTCJun 8, 05:40 UTC50m
2026-06-07 TVS477F SNN → LDE Jun 7, 16:15 UTCJun 7, 18:45 UTC2h 30m
2026-06-07 TVS4476 OZZ → CDG Jun 7, 12:15 UTCJun 7, 14:50 UTC2h 35m
2026-06-07 TVS477P PRG → PRG Jun 7, 08:25 UTCJun 7, 10:30 UTC2h 5m
2026-06-07 TVS2NQ ZTH → BTS Jun 7, 05:35 UTCJun 7, 07:20 UTC1h 45m
2026-06-07 TVS1NQ BTS → ZTH Jun 7, 02:40 UTCJun 7, 04:25 UTC1h 45m
2026-06-06 TVQ6173 AYT → BTS Jun 6, 20:49 UTCJun 6, 23:19 UTC2h 30m
2026-06-06 TVQ6174 KSC → AYT Jun 6, 17:15 UTCJun 6, 19:30 UTC2h 15m
2026-06-06 TVQ6172 BTS → AYT Jun 6, 10:09 UTCJun 6, 16:20 UTC6h 10m
2026-06-06 TVS2LM HER → BTS Jun 6, 06:45 UTCJun 6, 08:45 UTC2h 0m
2026-06-06 TVS1LM BTS → HER Jun 6, 03:20 UTCJun 6, 05:15 UTC1h 55m
2026-06-05 TVQ6451 MIR → BTS Jun 5, 18:35 UTCJun 5, 20:25 UTC1h 50m
2026-06-05 TVQ6452 KSC → MIR Jun 5, 15:05 UTCJun 5, 17:15 UTC2h 10m
2026-06-05 TVQ6453 MIR → KSC Jun 5, 11:30 UTCJun 5, 13:35 UTC2h 5m
2026-06-05 TVQ6450 BTS → MIR Jun 5, 08:25 UTCJun 5, 10:20 UTC1h 55m
2026-06-05 TVQ6717 OLB → BTS Jun 5, 05:05 UTCJun 5, 06:25 UTC1h 20m
2026-06-05 TVQ6716 BTS → OLB Jun 5, 02:20 UTCJun 5, 03:50 UTC1h 30m
2026-06-04 TVQ6481 MIR → BTS Jun 4, 22:50 UTCJun 5, 00:35 UTC1h 45m
2026-06-04 TVQ6480 BTS → MIR Jun 4, 19:30 UTCJun 4, 21:25 UTC1h 55m
2026-06-04 TVQ6255 IBZ → BTS Jun 4, 16:00 UTCJun 4, 18:20 UTC2h 20m
2026-06-04 TVQ6254 BTS → IBZ Jun 4, 12:15 UTCJun 4, 14:40 UTC2h 25m
2026-06-04 TVQ6137 ADB → BTS Jun 4, 09:00 UTCJun 4, 11:05 UTC2h 5m
2026-06-04 TVQ6148 KSC → ADB Jun 4, 05:55 UTCJun 4, 07:45 UTC1h 50m
2026-06-04 TVQ6149 ADB → KSC Jun 4, 03:15 UTCJun 4, 05:00 UTC1h 45m
2026-06-04 TVQ6136 BTS → ADB Jun 4, 00:15 UTCJun 4, 02:05 UTC1h 50m
2026-06-03 TVQ6165 AYT → BTS Jun 3, 20:35 UTCJun 3, 22:55 UTC2h 20m
2026-06-03 TVQ6166 KSC → AYT Jun 3, 17:10 UTCJun 3, 19:20 UTC2h 10m
2026-06-03 TVQ6167 AYT → KSC Jun 3, 13:50 UTCJun 3, 16:05 UTC2h 15m
2026-06-03 TVQ6130 TAT → AYT Jun 3, 10:15 UTCJun 3, 12:40 UTC2h 25m
2026-06-03 TVQ6131 AYT → TAT Jun 3, 06:15 UTCJun 3, 08:25 UTC2h 10m
2026-06-03 TVQ6164 BTS → AYT Jun 3, 02:35 UTCJun 3, 04:55 UTC2h 20m
2026-06-02 TVS89R RHO → BTS Jun 2, 19:55 UTCJun 2, 22:10 UTC2h 15m
2026-06-02 TVS89Q BTS → RHO Jun 2, 16:20 UTCJun 2, 18:30 UTC2h 10m
2026-06-02 TVQ6461 MIR → BTS Jun 2, 10:25 UTCJun 2, 12:20 UTC1h 55m
2026-06-02 TVQ6476 TAT → MIR Jun 2, 07:10 UTCJun 2, 09:05 UTC1h 55m
2026-06-02 TVQ6477 MIR → TAT Jun 2, 03:40 UTCJun 2, 05:50 UTC2h 10m
2026-06-02 TVQ6460 BTS → MIR Jun 2, 00:25 UTCJun 2, 02:10 UTC1h 45m
2026-06-01 TVQ6648 BTS → BVC Jun 1, 18:40 UTCJun 1, 23:15 UTC4h 35m
2026-06-01 TVQ6648 BTS → BVC Jun 1, 07:45 UTCJun 1, 11:15 UTC3h 30m
2026-05-31 TVQ6086 KSC → HRG May 31, 09:15 UTCMay 31, 17:55 UTC8h 40m
2026-05-30 TVQ6084 KSC → HRG May 30, 23:40 UTCMay 31, 01:11 UTC1h 31m
2026-05-30 TVQ6017 MUH → BTS May 30, 09:15 UTCMay 30, 16:05 UTC6h 50m
2026-05-30 TVQ6031 MUH → KSC May 30, 01:15 UTCMay 30, 07:35 UTC6h 20m
2026-05-29 TVP788P - May 29, 17:50 UTCMay 29, 19:10 UTC1h 20m
2026-05-29 TVP7808 LCJ → TIA May 29, 14:40 UTCMay 29, 16:15 UTC1h 35m

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

Mode-S 49D420 frequently asked

What is Mode-S code 49D420?
49D420 is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to OK-SWK.
Where is Mode-S 49D420 registered?
Mode-S code 49D420 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 49D420 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 49D420, octal 22352040, decimal 4,838,432.
What flights does 49D420 operate?
Mode-S 49D420 has broadcast 20 distinct callsigns, including TVS4ZA, TVS2QZ, TVL5170, TVS86U, TVS7PU.