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
No current signal · last broadcast 3h ago
Flights observed
419
Distinct callsigns
20
Country
CH
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4B1950.

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 - 13 2026-07-13
SWR2BK - 13 2026-07-13
SWR7MV - 11 2026-07-08
SWR2EG Swiss International Air Lines 11 2026-05-18
SWR27M - 11 2026-06-30
SWR1HW - 11 2026-07-09
SWR5XH Swiss International Air Lines 10 2026-05-18
SWR5GT Swiss International Air Lines 10 2026-05-19
SWR2EP Swiss International Air Lines 10 2026-05-19
SWR9AM - 9 2026-06-30
SWR2120 - 9 2026-07-02
SWR1ET - 9 2026-07-03
SWR1PM - 8 2026-07-11
SWR1KV - 8 2026-07-10
SWR8HG - 7 2026-07-02
SWR9LA Swiss International Air Lines 6 2026-06-05
SWR935L Swiss International Air Lines 6 2026-06-05
SWR8PZ - 6 2026-07-09
SWR5MP - 6 2026-07-09
SWR542D - 6 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWR755L ZRH → LIS Jul 13, 20:00 UTCJul 13, 22:45 UTC2h 45m
2026-07-13 SWR2GX LIS → ZRH Jul 13, 15:40 UTCJul 13, 17:55 UTC2h 15m
2026-07-13 SWR2BK ZRH → LIS Jul 13, 11:35 UTCJul 13, 14:10 UTC2h 35m
2026-07-13 SWR90Y - Jul 13, 08:15 UTCJul 13, 10:00 UTC1h 45m
2026-07-13 SWR4KG - Jul 13, 05:01 UTCJul 13, 06:25 UTC1h 25m
2026-07-12 SWR9KW BUD → ZRH Jul 12, 19:55 UTCJul 12, 21:15 UTC1h 20m
2026-07-12 SWR303C ZRH → BUD Jul 12, 17:15 UTCJul 12, 18:25 UTC1h 10m
2026-07-12 SWR5CB - Jul 12, 14:10 UTCJul 12, 15:15 UTC1h 5m
2026-07-12 SWR1PL ZRH → BER Jul 12, 11:50 UTCJul 12, 12:50 UTC1h 0m
2026-07-12 SWR4LM - Jul 12, 08:25 UTCJul 12, 09:50 UTC1h 25m
2026-07-12 SWR242E - Jul 12, 05:10 UTCJul 12, 06:50 UTC1h 40m
2026-07-11 SWR2BT ARN → ZRH Jul 11, 18:05 UTCJul 11, 20:05 UTC2h 0m
2026-07-11 SWR1H ZRH → ARN Jul 11, 14:55 UTCJul 11, 17:00 UTC2h 5m
2026-07-11 SWR5EZ ALC → ZRH Jul 11, 11:30 UTCJul 11, 13:25 UTC1h 55m
2026-07-11 SWR1V ZRH → ALC Jul 11, 07:55 UTCJul 11, 09:55 UTC2h 0m
2026-07-11 SWR1PM ARN → ZRH Jul 11, 04:35 UTCJul 11, 06:35 UTC2h 0m
2026-07-10 SWR1KV - Jul 10, 20:00 UTCJul 10, 22:05 UTC2h 5m
2026-07-10 SWR2GX LIS → ZRH Jul 10, 15:45 UTCJul 10, 17:55 UTC2h 10m
2026-07-10 SWR2BK ZRH → LIS Jul 10, 12:05 UTCJul 10, 14:25 UTC2h 20m
2026-07-10 SWR5MW - Jul 10, 08:15 UTCJul 10, 10:05 UTC1h 50m
2026-07-10 SWR89T - Jul 10, 05:25 UTCJul 10, 06:45 UTC1h 20m
2026-07-09 SWR2BT ARN → ZRH Jul 9, 17:35 UTCJul 9, 19:35 UTC2h 0m
2026-07-09 SWR1H ZRH → ARN Jul 9, 14:25 UTCJul 9, 16:35 UTC2h 10m
2026-07-09 SWR5MP LHR → ZRH Jul 9, 11:45 UTCJul 9, 12:55 UTC1h 10m
2026-07-09 SWR8PZ ZRH → LHR Jul 9, 08:45 UTCJul 9, 10:20 UTC1h 35m
2026-07-09 SWR1HW ATH → ZRH Jul 9, 04:10 UTCJul 9, 06:45 UTC2h 35m
2026-07-08 SWR7MV ZRH → ATH Jul 8, 19:40 UTCJul 8, 21:45 UTC2h 5m
2026-07-08 SWR1CK DUB → ZRH Jul 8, 12:30 UTCJul 8, 14:10 UTC1h 40m
2026-07-08 SWR477L ZRH → DUB Jul 8, 09:25 UTCJul 8, 11:15 UTC1h 50m
2026-07-08 SWR2083 LIS → ZRH Jul 8, 05:15 UTCJul 8, 07:45 UTC2h 30m
2026-07-07 SWR755L ZRH → LIS Jul 7, 20:00 UTCJul 7, 22:25 UTC2h 25m
2026-07-07 SWR438A - Jul 7, 16:50 UTCJul 7, 18:10 UTC1h 20m
2026-07-07 SWR21M ZRH → LHR Jul 7, 14:05 UTCJul 7, 15:30 UTC1h 25m
2026-07-07 SWR98F SKG → ZRH Jul 7, 10:25 UTCJul 7, 12:40 UTC2h 15m
2026-07-07 SWR79B ZRH → SKG Jul 7, 07:35 UTCJul 7, 09:25 UTC1h 50m
2026-07-07 SWR8AD CPH → ZRH Jul 7, 04:50 UTCJul 7, 06:10 UTC1h 20m
2026-07-06 SWR44X ZRH → CPH Jul 6, 19:50 UTCJul 6, 21:20 UTC1h 30m
2026-07-06 SWR262C - Jul 6, 16:05 UTCJul 6, 18:10 UTC2h 5m
2026-07-06 SWR3WL - Jul 6, 12:40 UTCJul 6, 14:50 UTC2h 10m
2026-07-06 SWR4LM - Jul 6, 08:20 UTCJul 6, 10:00 UTC1h 40m
2026-07-06 SWR242E - Jul 6, 05:20 UTCJul 6, 06:40 UTC1h 20m
2026-07-05 SWR39L - Jul 5, 19:30 UTCJul 5, 20:45 UTC1h 15m
2026-07-05 SWR115Y ZRH → LHR Jul 5, 16:55 UTCJul 5, 18:15 UTC1h 20m
2026-07-05 SWR5AX VLC → ZRH Jul 5, 13:20 UTCJul 5, 15:10 UTC1h 50m
2026-07-05 SWR336L ZRH → VLC Jul 5, 10:25 UTCJul 5, 12:10 UTC1h 45m
2026-07-05 SWR52Y BRU → ZRH Jul 5, 08:25 UTCJul 5, 09:10 UTC45m
2026-07-05 SWR756C ZRH → BRU Jul 5, 06:05 UTCJul 5, 07:05 UTC1h 0m
2026-07-04 SWR9VE BCN → ZRH Jul 4, 18:20 UTCJul 4, 19:45 UTC1h 25m
2026-07-04 SWR3GH ZRH → BCN Jul 4, 15:40 UTCJul 4, 17:00 UTC1h 20m
2026-07-04 SWR1CK DUB → ZRH Jul 4, 12:25 UTCJul 4, 14:05 UTC1h 40m

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?
No active broadcast right now. Last signal was 3h ago.
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, SWR7MV, SWR2EG, SWR27M.