Apparatus

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sensors Mode-S transponder

4B1881

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JHH · AIRBUS A-330-300

Hex
4B1881
Octal
22614201
Decimal
4,921,473
Country
CH
Tail
HB-JHH
Type
A333
Transponder active on ground
Flights observed
217
Distinct callsigns
20
Country
CH
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4B1881.

Country allocation

The ICAO 24-bit address 4B1881 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
SWR155 - 16 2026-07-12
SWR22D - 15 2026-06-21
SWR14V - 15 2026-06-20
SWR3W - 14 2026-06-21
SWR2647 Swiss International Air Lines 14 2026-06-03
SWR23A - 14 2026-06-21
SWR2646 Swiss International Air Lines 13 2026-06-03
SWR19C - 12 2026-06-15
SWR154 - 12 2026-07-12
SWR18P - 11 2026-06-14
SWR81 - 10 2026-07-10
SWR80 - 10 2026-07-10
SWR7C - 8 2026-07-11
SWR6A - 8 2026-07-11
SWR72 - 7 2026-07-02
SWR2K - 7 2026-07-03
SWR15X - 7 2026-06-30
SWR147 - 6 2026-07-03
SWR146 - 6 2026-07-03
SWR16F - 5 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWR52 ZRH → BOS Jul 13, 16:10 UTCJul 14, 00:00 UTC7h 50m
2026-07-12 SWR155 - Jul 12, 19:25 UTCJul 13, 04:15 UTC8h 50m
2026-07-12 SWR154 ZRH → BOM Jul 12, 08:10 UTCJul 12, 16:20 UTC8h 10m
2026-07-11 SWR7C - Jul 11, 20:05 UTCJul 12, 04:20 UTC8h 15m
2026-07-11 SWR6A ZRH → ORD Jul 11, 08:15 UTCJul 11, 17:20 UTC9h 5m
2026-07-10 SWR81 - Jul 10, 20:50 UTCJul 11, 04:20 UTC7h 30m
2026-07-10 SWR80 ZRH → YYZ Jul 10, 08:30 UTCJul 10, 16:55 UTC8h 25m
2026-07-07 SWR155 - Jul 7, 19:25 UTCJul 8, 04:30 UTC9h 5m
2026-07-07 SWR154 ZRH → BOM Jul 7, 08:10 UTCJul 7, 16:05 UTC7h 55m
2026-07-06 SWR155 - Jul 6, 21:30 UTCJul 7, 04:20 UTC6h 50m
2026-07-06 SWR155 - Jul 6, 19:30 UTCJul 6, 19:55 UTC25m
2026-07-06 SWR154 ZRH → BOM Jul 6, 08:15 UTCJul 6, 16:40 UTC8h 25m
2026-07-05 SWR81 YYZ → ZRH Jul 5, 20:50 UTCJul 6, 04:05 UTC7h 15m
2026-07-05 SWR80 ZRH → YYZ Jul 5, 08:20 UTCJul 5, 16:55 UTC8h 35m
2026-07-04 SWR81 YYZ → ZRH Jul 4, 21:05 UTCJul 5, 04:20 UTC7h 15m
2026-07-04 SWR80 ZRH → YYZ Jul 4, 08:35 UTCJul 4, 17:10 UTC8h 35m
2026-07-03 SWR147 - Jul 3, 20:05 UTCJul 3, 20:55 UTC50m
2026-07-03 SWR146 ZRH → DEL Jul 3, 10:45 UTCJul 3, 17:45 UTC7h 0m
2026-07-03 SWR2K IAD → ZRH Jul 3, 00:35 UTCJul 3, 08:00 UTC7h 25m
2026-07-02 SWR72 ZRH → IAD Jul 2, 12:10 UTCJul 2, 20:50 UTC8h 40m
2026-07-02 SWR4Y BOS → ZRH Jul 2, 02:25 UTCJul 2, 09:10 UTC6h 45m
2026-07-01 SWR52 ZRH → BOS Jul 1, 16:15 UTCJul 2, 00:05 UTC7h 50m
2026-06-30 SWR147 - Jun 30, 20:30 UTCJun 30, 21:10 UTC40m
2026-06-30 SWR146 ZRH → DEL Jun 30, 11:15 UTCJun 30, 18:15 UTC7h 0m
2026-06-30 SWR15X JFK → ZRH Jun 30, 01:40 UTCJun 30, 08:25 UTC6h 45m
2026-06-29 SWR16F ZRH → JFK Jun 29, 08:19 UTCJun 29, 16:29 UTC8h 10m
2026-06-28 SWR81 - Jun 28, 20:50 UTCJun 29, 04:20 UTC7h 30m
2026-06-28 SWR80 ZRH → YYZ Jun 28, 08:34 UTCJun 28, 16:39 UTC8h 5m
2026-06-27 SWR7C - Jun 27, 19:59 UTCJun 28, 04:25 UTC8h 25m
2026-06-27 SWR6A ZRH → ORD Jun 27, 08:20 UTCJun 27, 17:29 UTC9h 10m
2026-06-26 SWR81 - Jun 26, 20:59 UTCJun 27, 04:34 UTC7h 35m
2026-06-26 SWR80 ZRH → YYZ Jun 26, 08:34 UTCJun 26, 16:49 UTC8h 15m
2026-06-25 SWR81 YYZ → ZRH Jun 25, 21:05 UTCJun 26, 04:34 UTC7h 30m
2026-06-25 SWR80 ZRH → YYZ Jun 25, 08:50 UTCJun 25, 17:05 UTC8h 15m
2026-06-24 SWR155 - Jun 24, 19:34 UTCJun 25, 04:20 UTC8h 45m
2026-06-24 SWR154 ZRH → BOM Jun 24, 08:20 UTCJun 24, 16:40 UTC8h 20m
2026-06-23 SWR147 DEL → ZRH Jun 23, 20:29 UTCJun 24, 04:24 UTC7h 55m
2026-06-23 SWR146 ZRH → DEL Jun 23, 10:55 UTCJun 23, 18:10 UTC7h 15m
2026-06-23 SWR15X JFK → ZRH Jun 23, 01:25 UTCJun 23, 08:35 UTC7h 10m
2026-06-22 SWR16F ZRH → JFK Jun 22, 08:29 UTCJun 22, 17:00 UTC8h 30m
2026-06-21 SWR3W - Jun 21, 21:10 UTCJun 22, 04:15 UTC7h 5m
2026-06-21 SWR22D - Jun 21, 09:59 UTCJun 21, 18:00 UTC8h 0m
2026-06-21 SWR23A JFK → GVA Jun 21, 00:25 UTCJun 21, 07:14 UTC6h 50m
2026-06-20 SWR14V ZRH → JFK Jun 20, 12:54 UTCJun 20, 21:19 UTC8h 25m
2026-06-18 SWR7C - Jun 18, 20:10 UTCJun 19, 04:19 UTC8h 9m
2026-06-18 SWR6A ZRH → ORD Jun 18, 08:20 UTCJun 18, 17:21 UTC9h 1m
2026-06-17 SWR147 DEL → ZRH Jun 17, 20:05 UTCJun 18, 04:10 UTC8h 5m
2026-06-17 SWR146 ZRH → DEL Jun 17, 11:00 UTCJun 17, 18:10 UTC7h 10m
2026-06-16 SWR3W JFK → ZRH Jun 16, 21:15 UTCJun 17, 04:10 UTC6h 55m
2026-06-16 SWR22D GVA → JFK Jun 16, 09:55 UTCJun 16, 18:05 UTC8h 10m

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

Mode-S 4B1881 frequently asked

What is Mode-S code 4B1881?
4B1881 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JHH.
Where is Mode-S 4B1881 registered?
Mode-S code 4B1881 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1881 broadcasting right now?
Mode-S 4B1881 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1881, octal 22614201, decimal 4,921,473.
What flights does 4B1881 operate?
Mode-S 4B1881 has broadcast 20 distinct callsigns, including SWR155, SWR22D, SWR14V, SWR3W, SWR2647.