Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4B1904

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JMI · AIRBUS A-340-300

Hex
4B1904
Octal
22614404
Decimal
4,921,604
Country
CH
Tail
HB-JMI
Type
A343
Broadcasting now · callsign SWR188 · 4,975 ft
Flights observed
65
Distinct callsigns
6
Country
CH
Last broadcast
1d ago

Current position

4B1904 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4B1904 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 6 distinct

Callsign Airline Flights Last seen
SWR283 Swiss International Air Lines 21 2026-05-28
SWR282 Swiss International Air Lines 19 2026-05-27
SWR189 Swiss International Air Lines 11 2026-05-26
SWR188 Swiss International Air Lines 8 2026-05-25
SWR9G Swiss International Air Lines 3 2026-05-12
SWR8T Swiss International Air Lines 3 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 SWR283 JNB → ZRH May 28, 18:00 UTCMay 29, 04:10 UTC10h 10m
2026-05-27 SWR282 ZRH → JNB May 27, 20:55 UTCMay 28, 07:15 UTC10h 20m
2026-05-26 SWR189 PVG → ZRH May 26, 04:24 UTCMay 26, 16:05 UTC11h 40m
2026-05-25 SWR189 PVG → ZRH May 25, 15:05 UTCMay 26, 15:00 UTC23h 54m
2026-05-25 SWR188 ZRH → PVG May 25, 13:05 UTCMay 26, 13:00 UTC23h 54m
2026-05-25 SWR188 ZRH → PVG May 25, 11:35 UTCMay 26, 08:45 UTC21h 9m
2026-05-23 SWR283 JNB → ZRH May 23, 02:50 UTCMay 23, 04:25 UTC1h 35m
2026-05-22 SWR283 JNB → ZRH May 22, 17:45 UTCMay 22, 18:15 UTC30m
2026-05-21 SWR282 ZRH → JNB May 21, 21:20 UTCMay 22, 07:05 UTC9h 45m
2026-05-21 SWR189 PVG → ZRH May 21, 03:50 UTCMay 21, 15:50 UTC12h 0m
2026-05-20 SWR189 PVG → ZRH May 20, 13:05 UTCMay 21, 13:01 UTC23h 55m
2026-05-20 SWR188 ZRH → PVG May 20, 11:20 UTCMay 21, 04:10 UTC16h 50m
2026-05-19 SWR283 JNB → ZRH May 19, 17:55 UTCMay 20, 04:10 UTC10h 15m
2026-05-18 SWR282 ZRH → JNB May 18, 21:00 UTCMay 19, 06:40 UTC9h 40m
2026-05-16 SWR283 JNB → ZRH May 16, 17:55 UTCMay 17, 04:10 UTC10h 15m
2026-05-15 SWR282 ZRH → JNB May 15, 20:55 UTCMay 16, 07:01 UTC10h 6m
2026-05-14 SWR283 JNB → ZRH May 14, 17:50 UTCMay 15, 04:15 UTC10h 25m
2026-05-13 SWR282 ZRH → JNB May 13, 21:10 UTCMay 14, 07:20 UTC10h 10m
2026-05-12 SWR9G ORD → ZRH May 12, 02:45 UTCMay 12, 08:55 UTC6h 10m
2026-05-11 SWR8T ZRH → ORD May 11, 11:45 UTCMay 11, 21:00 UTC9h 15m
2026-05-10 SWR283 JNB → ZRH May 10, 17:40 UTCMay 11, 04:10 UTC10h 30m
2026-05-09 SWR282 ZRH → JNB May 9, 20:49 UTCMay 10, 07:04 UTC10h 15m
2026-05-08 SWR283 JNB → ZRH May 8, 18:00 UTCMay 9, 04:25 UTC10h 25m
2026-05-07 SWR282 ZRH → JNB May 7, 20:45 UTCMay 8, 06:54 UTC10h 10m
2026-05-06 SWR283 JNB → ZRH May 6, 17:45 UTCMay 7, 04:25 UTC10h 40m
2026-05-05 SWR282 ZRH → JNB May 5, 20:45 UTCMay 6, 07:10 UTC10h 25m
2026-05-05 SWR189 PVG → ZRH May 5, 04:05 UTCMay 5, 16:10 UTC12h 5m
2026-05-04 SWR189 PVG → ZRH May 4, 15:05 UTCMay 5, 15:01 UTC23h 56m
2026-05-04 SWR188 ZRH → PVG May 4, 13:05 UTCMay 5, 13:00 UTC23h 56m
2026-05-04 SWR188 ZRH → PVG May 4, 11:25 UTCMay 5, 04:25 UTC17h 1m
2026-05-04 SWR9G ORD → ZRH May 4, 00:30 UTCMay 4, 08:50 UTC8h 20m
2026-05-03 SWR8T ZRH → ORD May 3, 11:25 UTCMay 3, 20:20 UTC8h 55m
2026-05-03 SWR9G ORD → ZRH May 3, 00:30 UTCMay 3, 08:45 UTC8h 14m
2026-05-02 SWR8T ZRH → ORD May 2, 11:45 UTCMay 2, 20:45 UTC9h 0m
2026-05-01 SWR283 JNB → ZRH May 1, 17:40 UTCMay 2, 04:15 UTC10h 35m
2026-04-30 SWR282 ZRH → JNB Apr 30, 21:00 UTCMay 1, 07:10 UTC10h 10m
2026-04-30 SWR189 PVG → ZRH Apr 30, 04:20 UTCApr 30, 16:20 UTC12h 0m
2026-04-29 SWR189 PVG → ZRH Apr 29, 17:50 UTCApr 30, 16:20 UTC22h 30m
2026-04-29 SWR189 PVG → ZRH Apr 29, 13:05 UTCApr 30, 13:00 UTC23h 55m
2026-04-29 SWR188 ZRH → PVG Apr 29, 11:20 UTCApr 30, 04:35 UTC17h 14m
2026-04-27 SWR283 JNB → ZRH Apr 27, 18:00 UTCApr 28, 04:10 UTC10h 10m
2026-04-26 SWR282 ZRH → JNB Apr 26, 20:55 UTCApr 27, 07:15 UTC10h 20m
2026-04-24 SWR283 JNB → ZRH Apr 24, 17:50 UTCApr 25, 04:10 UTC10h 20m
2026-04-23 SWR282 ZRH → JNB Apr 23, 20:50 UTCApr 24, 06:50 UTC10h 0m
2026-04-22 SWR283 JNB → ZRH Apr 22, 17:50 UTCApr 23, 04:10 UTC10h 20m
2026-04-21 SWR282 ZRH → JNB Apr 21, 20:45 UTCApr 22, 06:50 UTC10h 5m
2026-04-20 SWR283 JNB → ZRH Apr 20, 17:55 UTCApr 21, 04:10 UTC10h 15m
2026-04-19 SWR282 ZRH → JNB Apr 19, 20:50 UTCApr 20, 06:55 UTC10h 5m
2026-04-19 SWR189 PVG → ZRH Apr 19, 04:05 UTCApr 19, 16:25 UTC12h 20m
2026-04-18 SWR189 PVG → ZRH Apr 18, 15:05 UTCApr 19, 15:00 UTC23h 55m

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

Mode-S 4B1904 frequently asked

What is Mode-S code 4B1904?
4B1904 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JMI.
Where is Mode-S 4B1904 registered?
Mode-S code 4B1904 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1904 broadcasting right now?
Yes. Mode-S 4B1904 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1904, octal 22614404, decimal 4,921,604.
What flights does 4B1904 operate?
Mode-S 4B1904 has broadcast 6 distinct callsigns, including SWR283, SWR282, SWR189, SWR188, SWR9G.