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 Jul 26, 19:15 UTC
Flights observed
474
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 19:15 UTC

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 8 2026-07-21
SWR5BW Swiss International Air Lines 7 2026-07-24
SWR2MB Swiss International Air Lines 7 2026-07-21
SWR7BL - 6 2026-07-20
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
SWR28L - 6 2026-07-02
SWR13Y Swiss International Air Lines 6 2026-07-21
SWR12K Swiss International Air Lines 6 2026-07-25
SWR104C - 6 2026-07-04
SWR9TV Swiss International Air Lines 5 2026-05-17
SWR9D - 5 2026-06-30
SWR955M - 5 2026-07-20
SWR8MV Swiss International Air Lines 5 2026-07-21
SWR74D - 5 2026-07-07
SWR3WG - 5 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWR5177 BER → ZRH Jul 26, 18:00 UTCJul 26, 19:00 UTC1h 0m
2026-07-25 SWR5HX ZRH → PRG Jul 25, 11:20 UTCJul 25, 12:20 UTC1h 0m
2026-07-25 SWR4EA NCE → ZRH Jul 25, 09:05 UTCJul 25, 10:00 UTC55m
2026-07-25 SWR564 ZRH → NCE Jul 25, 07:00 UTCJul 25, 08:00 UTC1h 0m
2026-07-25 SWR12K LHR → GVA Jul 25, 04:25 UTCJul 25, 05:25 UTC1h 0m
2026-07-24 SWR5BW ZRH → PRG Jul 24, 20:10 UTCJul 24, 21:10 UTC1h 0m
2026-07-24 SWR1213 OSL → ZRH Jul 24, 16:30 UTCJul 24, 18:20 UTC1h 50m
2026-07-24 SWR1212 ZRH → OSL Jul 24, 13:15 UTCJul 24, 15:30 UTC2h 15m
2026-07-24 SWR431 LGW → ZRH Jul 24, 09:00 UTCJul 24, 10:20 UTC1h 20m
2026-07-24 SWR431 LGW → ZRH Jul 24, 06:45 UTCJul 24, 07:10 UTC25m
2026-07-24 SWR5YD - Jul 24, 06:00 UTCJul 24, 06:40 UTC40m
2026-07-23 SWR829 HAJ → ZRH Jul 23, 17:50 UTCJul 23, 18:35 UTC45m
2026-07-23 SWR5MT ZRH → HAJ Jul 23, 15:45 UTCJul 23, 16:55 UTC1h 10m
2026-07-23 SWR4LT BUD → ZRH Jul 23, 13:00 UTCJul 23, 14:20 UTC1h 20m
2026-07-23 SWR51K ZRH → LYS Jul 23, 10:45 UTCJul 23, 11:55 UTC1h 10m
2026-07-23 SWR51K ZRH → LYS Jul 23, 10:10 UTCJul 23, 10:15 UTC5m
2026-07-23 SWR9MH STR → ZRH Jul 23, 09:05 UTCJul 23, 09:35 UTC30m
2026-07-23 SWR1FP ZRH → STR Jul 23, 07:25 UTCJul 23, 07:50 UTC25m
2026-07-22 SWR - Jul 22, 20:35 UTCJul 22, 20:55 UTC20m
2026-07-22 SWR465Y ALC → ZRH Jul 22, 18:20 UTCJul 22, 20:10 UTC1h 50m
2026-07-22 SWR374P ZRH → ALC Jul 22, 15:10 UTCJul 22, 17:10 UTC2h 0m
2026-07-22 SWR2EY GVA → ZRH Jul 22, 04:15 UTCJul 22, 04:45 UTC30m
2026-07-21 SWR2MB FRA → GVA Jul 21, 19:40 UTCJul 21, 20:25 UTC45m
2026-07-21 SWR461V GVA → FRA Jul 21, 17:00 UTCJul 21, 17:55 UTC55m
2026-07-21 SWR13Y LHR → GVA Jul 21, 14:00 UTCJul 21, 15:10 UTC1h 10m
2026-07-21 SWR29K GVA → LHR Jul 21, 11:15 UTCJul 21, 12:30 UTC1h 15m
2026-07-21 SWR8MV LHR → GVA Jul 21, 08:35 UTCJul 21, 09:45 UTC1h 10m
2026-07-21 SWR49M GVA → LHR Jul 21, 05:45 UTCJul 21, 07:05 UTC1h 20m
2026-07-20 SWR448G DUB → GVA Jul 20, 19:20 UTCJul 20, 21:05 UTC1h 45m
2026-07-20 SWR48X GVA → DUB Jul 20, 16:25 UTCJul 20, 18:20 UTC1h 55m
2026-07-20 SWR7BL - Jul 20, 08:25 UTCJul 20, 10:25 UTC2h 0m
2026-07-20 SWR955M - Jul 20, 05:25 UTCJul 20, 07:00 UTC1h 35m
2026-07-19 SWR218Q - Jul 19, 20:05 UTCJul 19, 21:30 UTC1h 25m
2026-07-19 SWR2HV GVA → VLC Jul 19, 17:10 UTCJul 19, 19:00 UTC1h 50m
2026-07-19 SWR13Y LHR → GVA Jul 19, 14:15 UTCJul 19, 15:25 UTC1h 10m
2026-07-19 SWR29K GVA → LHR Jul 19, 11:30 UTCJul 19, 13:05 UTC1h 35m
2026-07-19 SWR8KM FAO → GVA Jul 19, 08:05 UTCJul 19, 10:10 UTC2h 5m
2026-07-19 SWR273M GVA → FAO Jul 19, 04:30 UTCJul 19, 06:55 UTC2h 25m
2026-07-18 SWR4TH ZRH → GVA Jul 18, 19:30 UTCJul 18, 20:00 UTC30m
2026-07-18 SWR4VZ - Jul 18, 13:55 UTCJul 18, 15:05 UTC1h 10m
2026-07-18 SWR331F ZRH → BOD Jul 18, 11:30 UTCJul 18, 12:55 UTC1h 25m
2026-07-18 SWR4EA NCE → ZRH Jul 18, 09:20 UTCJul 18, 10:15 UTC55m
2026-07-18 SWR564 ZRH → NCE Jul 18, 06:55 UTCJul 18, 08:00 UTC1h 5m
2026-07-18 SWR2069 OPO → ZRH Jul 18, 02:09 UTCJul 18, 04:20 UTC2h 11m
2026-07-17 SWR2068 ZRH → OPO Jul 17, 21:05 UTCJul 17, 23:25 UTC2h 20m
2026-07-17 SWR3AV MAN → ZRH Jul 17, 09:04 UTCJul 17, 10:50 UTC1h 45m
2026-07-17 SWR5P ZRH → MAN Jul 17, 05:39 UTCJul 17, 07:25 UTC1h 45m
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

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 Jul 26, 19:15 UTC.
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, SWR2MB, SWR7BL.