Apparatus

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sensors Mode-S transponder

4B1801

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JCJ · AIRBUS A220-300

Hex
4B1801
Octal
22614001
Decimal
4,921,345
Country
CH
Tail
HB-JCJ
Type
BCS3
No current signal · last broadcast 1d ago
Flights observed
427
Distinct callsigns
20
Country
CH
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4B1801.

Country allocation

The ICAO 24-bit address 4B1801 falls within the block assigned to Switzerland (CH) by ICAO Annex 10, Volume III. Every aircraft registered in Switzerland 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
SWR736 - 8 2026-07-07
SWR461V Swiss International Air Lines 7 2026-06-09
SWR5BW - 6 2026-07-10
SWR59K Swiss International Air Lines 6 2026-07-02
SWR57B - 6 2026-07-03
SWR4EY - 6 2026-07-02
SWR47W - 6 2026-07-08
SWR3CX - 6 2026-07-07
SWR2MB Swiss International Air Lines 6 2026-06-09
SWR28L - 6 2026-07-02
SWR104C - 6 2026-07-04
SWR9TV Swiss International Air Lines 5 2026-05-17
SWR9D - 5 2026-06-30
SWR7BL - 5 2026-07-01
SWR74D - 5 2026-07-07
SWR3WG - 5 2026-07-04
SWR2LB - 5 2026-07-08
SWR2CY Swiss International Air Lines 5 2026-05-17
SWR12K - 5 2026-07-11
SWR9AM - 4 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 EDW403Y - Jul 12, 09:05 UTCJul 12, 10:55 UTC1h 50m
2026-07-12 EDW402 - Jul 12, 05:01 UTCJul 12, 06:25 UTC1h 25m
2026-07-11 SWR NCE → ZRH Jul 11, 09:20 UTCJul 11, 10:20 UTC1h 0m
2026-07-11 SWR564 - Jul 11, 06:45 UTCJul 11, 07:35 UTC50m
2026-07-11 SWR12K PRG → ZRH Jul 11, 04:25 UTCJul 11, 05:20 UTC55m
2026-07-10 SWR5BW ZRH → PRG Jul 10, 20:40 UTCJul 10, 21:35 UTC55m
2026-07-10 SWR300P - Jul 10, 14:05 UTCJul 10, 15:55 UTC1h 50m
2026-07-10 SWR2512 - Jul 10, 10:15 UTCJul 10, 11:40 UTC1h 25m
2026-07-10 SWR3KH - Jul 10, 07:55 UTCJul 10, 09:00 UTC1h 5m
2026-07-10 SWR4WF ZRH → PRG Jul 10, 05:45 UTCJul 10, 06:50 UTC1h 5m
2026-07-09 SWR829 HAJ → ZRH Jul 9, 17:55 UTCJul 9, 18:50 UTC55m
2026-07-09 SWR5MT - Jul 9, 15:50 UTCJul 9, 16:55 UTC1h 5m
2026-07-09 EDW435 - Jul 9, 13:35 UTCJul 9, 14:40 UTC1h 5m
2026-07-09 EDW434 - Jul 9, 11:05 UTCJul 9, 11:50 UTC45m
2026-07-09 SWR7AK - Jul 9, 08:05 UTCJul 9, 09:00 UTC55m
2026-07-09 SWR42B ZRH → NCE Jul 9, 05:55 UTCJul 9, 06:45 UTC50m
2026-07-08 SWR51D - Jul 8, 13:50 UTCJul 8, 15:20 UTC1h 30m
2026-07-08 SWR2LB ZRH → MAN Jul 8, 11:00 UTCJul 8, 12:35 UTC1h 35m
2026-07-08 SWR2LB - Jul 8, 09:25 UTCJul 8, 09:45 UTC20m
2026-07-08 SWR9MH - Jul 8, 07:40 UTCJul 8, 08:05 UTC25m
2026-07-08 SWR47W - Jul 8, 05:20 UTCJul 8, 06:15 UTC55m
2026-07-07 SWR736 - Jul 7, 19:05 UTCJul 7, 20:15 UTC1h 10m
2026-07-07 SWR736 GVA → ZRH Jul 7, 17:30 UTCJul 7, 18:00 UTC30m
2026-07-07 SWR3CX - Jul 7, 15:35 UTCJul 7, 16:05 UTC30m
2026-07-07 SWR15Y - Jul 7, 13:30 UTCJul 7, 14:30 UTC1h 0m
2026-07-07 SWR74D - Jul 7, 11:20 UTCJul 7, 12:20 UTC1h 0m
2026-07-07 SWR74D ZRH → ZRH Jul 7, 10:05 UTCJul 7, 10:10 UTC5m
2026-07-07 SWR3TE - Jul 7, 08:45 UTCJul 7, 09:45 UTC1h 0m
2026-07-07 SWR2HD ZRH → BER Jul 7, 06:30 UTCJul 7, 07:50 UTC1h 20m
2026-07-06 SWR1PX NCE → ZRH Jul 6, 17:30 UTCJul 6, 18:25 UTC55m
2026-07-06 SWR57C - Jul 6, 15:25 UTCJul 6, 16:20 UTC55m
2026-07-06 SWR4VZ BOD → ZRH Jul 6, 12:35 UTCJul 6, 13:55 UTC1h 20m
2026-07-06 SWR331F ZRH → BOD Jul 6, 10:20 UTCJul 6, 11:35 UTC1h 15m
2026-07-06 SWR1849 SKG → ZRH Jul 6, 02:10 UTCJul 6, 04:30 UTC2h 20m
2026-07-05 SWR1848 - Jul 5, 21:05 UTCJul 5, 22:55 UTC1h 50m
2026-07-05 SWR8CM - Jul 5, 18:35 UTCJul 5, 19:30 UTC55m
2026-07-05 SWR2VC - Jul 5, 16:05 UTCJul 5, 17:20 UTC1h 15m
2026-07-05 SWR9LK HAJ → ZRH Jul 5, 13:45 UTCJul 5, 14:40 UTC55m
2026-07-05 SWR1EX - Jul 5, 11:45 UTCJul 5, 12:45 UTC1h 0m
2026-07-05 SWR300P - Jul 5, 08:35 UTCJul 5, 10:25 UTC1h 50m
2026-07-05 SWR2512 - Jul 5, 06:05 UTCJul 5, 07:25 UTC1h 20m
2026-07-05 SWR2512 ZRH → ZRH Jul 5, 04:10 UTCJul 5, 04:15 UTC5m
2026-07-04 SWR27M - Jul 4, 18:05 UTCJul 4, 19:15 UTC1h 10m
2026-07-04 SWR9AM - Jul 4, 15:35 UTCJul 4, 17:00 UTC1h 25m
2026-07-04 SWR9AM ZRH → ZRH Jul 4, 14:20 UTCJul 4, 14:25 UTC5m
2026-07-04 SWR2ZT - Jul 4, 13:20 UTCJul 4, 14:15 UTC55m
2026-07-04 SWR1ZM - Jul 4, 11:30 UTCJul 4, 12:10 UTC40m
2026-07-04 SWR3HY - Jul 4, 09:45 UTCJul 4, 10:15 UTC30m
2026-07-04 SWR3WG FRA → GVA Jul 4, 06:55 UTCJul 4, 07:40 UTC45m
2026-07-04 SWR104C GVA → FRA Jul 4, 04:25 UTCJul 4, 05:25 UTC1h 0m

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 HB-JCJ page for operator, model, and routing details .

Mode-S 4B1801 frequently asked

What is Mode-S code 4B1801?
4B1801 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JCJ.
Where is Mode-S 4B1801 registered?
Mode-S code 4B1801 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1801 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1801, octal 22614001, decimal 4,921,345.
What flights does 4B1801 operate?
Mode-S 4B1801 has broadcast 20 distinct callsigns, including SWR736, SWR461V, SWR5BW, SWR59K, SWR57B.