Apparatus

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sensors Mode-S transponder

4B1950

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JPG · AIRBUS A-321neo

Hex
4B1950
Octal
22614520
Decimal
4,921,680
Country
CH
Tail
HB-JPG
Type
A21N
Broadcasting now · callsign SWR89T · 35,350 ft
Flights observed
487
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 21:00 UTC

Current position

4B1950 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4B1950 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
SWR2GX - 14 2026-07-18
SWR2BK - 14 2026-07-18
SWR27M Swiss International Air Lines 14 2026-07-21
SWR7MV Swiss International Air Lines 12 2026-07-18
SWR2EG - 12 2026-07-16
SWR1HW Swiss International Air Lines 12 2026-07-19
SWR9AM - 11 2026-07-21
SWR5XH - 11 2026-07-16
SWR5GT Swiss International Air Lines 11 2026-07-19
SWR2EP - 11 2026-07-19
SWR9LA Swiss International Air Lines 9 2026-07-24
SWR935L Swiss International Air Lines 9 2026-07-24
SWR2120 - 9 2026-07-02
SWR1ET - 9 2026-07-03
SWR8HG Swiss International Air Lines 8 2026-07-18
SWR1PM - 8 2026-07-11
SWR1KV - 8 2026-07-10
SWR755L Swiss International Air Lines 7 2026-07-24
SWR542D - 7 2026-07-18
SWR477L Swiss International Air Lines 7 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWR5TV OPO → ZRH Jul 26, 18:35 UTCJul 26, 20:55 UTC2h 20m
2026-07-26 SWR82L ZRH → OPO Jul 26, 15:05 UTCJul 26, 17:05 UTC2h 0m
2026-07-26 SWR2YB ARN → ZRH Jul 26, 11:25 UTCJul 26, 13:35 UTC2h 10m
2026-07-26 SWR5ZM ZRH → ARN Jul 26, 07:55 UTCJul 26, 10:00 UTC2h 5m
2026-07-26 SWR5XL BER → ZRH Jul 26, 05:30 UTCJul 26, 06:35 UTC1h 6m
2026-07-25 SWR9LC ZRH → BER Jul 25, 19:35 UTCJul 25, 20:40 UTC1h 5m
2026-07-25 SWR204K MXP → ZRH Jul 25, 17:40 UTCJul 25, 18:05 UTC25m
2026-07-25 SWR7WA ZRH → MXP Jul 25, 16:00 UTCJul 25, 16:25 UTC25m
2026-07-25 SWR1CK DUB → ZRH Jul 25, 12:50 UTCJul 25, 14:30 UTC1h 40m
2026-07-25 SWR477L ZRH → ZRH Jul 25, 09:45 UTCJul 25, 11:30 UTC1h 45m
2026-07-25 SWR2083 LIS → ZRH Jul 25, 06:15 UTCJul 25, 08:25 UTC2h 10m
2026-07-24 SWR755L ZRH → ZRH Jul 24, 20:15 UTCJul 24, 23:00 UTC2h 45m
2026-07-24 SWR1PX NCE → ZRH Jul 24, 17:40 UTCJul 24, 18:30 UTC50m
2026-07-24 SWR57C ZRH → NCE Jul 24, 15:35 UTCJul 24, 16:20 UTC45m
2026-07-24 SWR935L ATH → ZRH Jul 24, 11:35 UTCJul 24, 14:10 UTC2h 35m
2026-07-24 SWR9LA ZRH → ATH Jul 24, 07:50 UTCJul 24, 09:55 UTC2h 5m
2026-07-24 SWR49L OTP → ZRH Jul 24, 03:35 UTCJul 24, 05:35 UTC2h 0m
2026-07-23 SWR1886 ZRH → OTP Jul 23, 20:10 UTCJul 23, 22:00 UTC1h 50m
2026-07-23 SWR7DC BRU → ZRH Jul 23, 17:45 UTCJul 23, 18:30 UTC45m
2026-07-23 SWR8QE ZRH → BRU Jul 23, 15:35 UTCJul 23, 16:30 UTC55m
2026-07-23 SWR1CK DUB → ZRH Jul 23, 12:25 UTCJul 23, 14:15 UTC1h 50m
2026-07-23 SWR477L ZRH → DUB Jul 23, 09:05 UTCJul 23, 11:00 UTC1h 55m
2026-07-23 SWR2083 LIS → ZRH Jul 23, 05:25 UTCJul 23, 07:40 UTC2h 15m
2026-07-22 SWR755L ZRH → LIS Jul 22, 19:55 UTCJul 22, 22:45 UTC2h 50m
2026-07-22 SWR262C - Jul 22, 15:25 UTCJul 22, 17:35 UTC2h 10m
2026-07-22 SWR3WL - Jul 22, 11:50 UTCJul 22, 14:05 UTC2h 15m
2026-07-21 SWR27M LHR → ZRH Jul 21, 19:15 UTCJul 21, 19:40 UTC25m
2026-07-21 SWR27M LHR → ZRH Jul 21, 17:55 UTCJul 21, 19:10 UTC1h 15m
2026-07-21 SWR9AM ZRH → LHR Jul 21, 15:15 UTCJul 21, 16:35 UTC1h 20m
2026-07-21 SWR935L ATH → ZRH Jul 21, 11:20 UTCJul 21, 13:55 UTC2h 35m
2026-07-21 SWR9LA ZRH → ATH Jul 21, 07:45 UTCJul 21, 10:00 UTC2h 15m
2026-07-21 SWR4VE GVA → FRA Jul 21, 04:10 UTCJul 21, 05:30 UTC1h 20m
2026-07-20 SWR4KB ZRH → BCN Jul 20, 20:10 UTCJul 20, 21:40 UTC1h 30m
2026-07-20 SWR7DC - Jul 20, 17:55 UTCJul 20, 18:40 UTC45m
2026-07-20 SWR8QE ZRH → BRU Jul 20, 15:35 UTCJul 20, 16:30 UTC55m
2026-07-20 SWR493Z HAM → ZRH Jul 20, 13:20 UTCJul 20, 14:20 UTC1h 0m
2026-07-20 SWR27G ZRH → HAM Jul 20, 10:55 UTCJul 20, 12:00 UTC1h 5m
2026-07-20 SWR96M BCN → BCN Jul 20, 08:15 UTCJul 20, 09:35 UTC1h 20m
2026-07-20 SWR44Y ZRH → BCN Jul 20, 05:30 UTCJul 20, 06:50 UTC1h 20m
2026-07-19 SWR122C DUB → ZRH Jul 19, 19:45 UTCJul 19, 21:30 UTC1h 45m
2026-07-19 SWR404 ZRH → DUB Jul 19, 15:05 UTCJul 19, 17:00 UTC1h 55m
2026-07-19 SWR5GT FCO → ZRH Jul 19, 11:10 UTCJul 19, 12:45 UTC1h 35m
2026-07-19 SWR2EP - Jul 19, 08:15 UTCJul 19, 10:05 UTC1h 50m
2026-07-19 SWR1HW ATH → ZRH Jul 19, 04:25 UTCJul 19, 06:55 UTC2h 30m
2026-07-18 SWR7MV ZRH → ATH Jul 18, 19:40 UTCJul 18, 21:50 UTC2h 10m
2026-07-18 SWR2GX LIS → ZRH Jul 18, 15:25 UTCJul 18, 17:55 UTC2h 30m
2026-07-18 SWR2BK ZRH → LIS Jul 18, 11:20 UTCJul 18, 14:05 UTC2h 45m
2026-07-18 SWR8HG LHR → ZRH Jul 18, 08:40 UTCJul 18, 09:50 UTC1h 10m
2026-07-18 SWR542D ZRH → LHR Jul 18, 05:25 UTCJul 18, 07:05 UTC1h 40m
2026-07-17 SWR27M LHR → ZRH Jul 17, 18:25 UTCJul 17, 19:40 UTC1h 15m

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

Mode-S 4B1950 frequently asked

What is Mode-S code 4B1950?
4B1950 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JPG.
Where is Mode-S 4B1950 registered?
Mode-S code 4B1950 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1950 broadcasting right now?
Yes. Mode-S 4B1950 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1950, octal 22614520, decimal 4,921,680.
What flights does 4B1950 operate?
Mode-S 4B1950 has broadcast 20 distinct callsigns, including SWR2GX, SWR2BK, SWR27M, SWR7MV, SWR2EG.