Apparatus

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sensors Mode-S transponder

4B15A2

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-IFA · AIRBUS A-350-900

Hex
4B15A2
Octal
22612642
Decimal
4,920,738
Country
CH
Tail
HB-IFA
Type
A359
No current signal · last broadcast 1h ago
Flights observed
126
Distinct callsigns
8
Country
CH
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4B15A2.

Country allocation

The ICAO 24-bit address 4B15A2 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 8 distinct

Callsign Airline Flights Last seen
SWR54B Swiss International Air Lines 44 2026-05-29
SWR2V Swiss International Air Lines 41 2026-05-29
SWR122 Swiss International Air Lines 16 2026-05-26
SWR123 Swiss International Air Lines 12 2026-05-27
SWR52F Swiss International Air Lines 3 2026-05-27
SWR4WP Swiss International Air Lines 3 2026-05-27
SWR4WF Swiss International Air Lines 3 2026-05-28
SWR3KH Swiss International Air Lines 3 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SWR2V BOS → ZRH May 29, 21:45 UTCMay 30, 04:25 UTC6h 40m
2026-05-29 SWR54B ZRH → BOS May 29, 11:35 UTCMay 29, 18:50 UTC7h 15m
2026-05-28 SWR2V BOS → ZRH May 28, 22:00 UTCMay 29, 04:40 UTC6h 40m
2026-05-28 SWR54B ZRH → BOS May 28, 11:45 UTCMay 28, 19:00 UTC7h 15m
2026-05-28 SWR3KH PRG → ZRH May 28, 07:55 UTCMay 28, 09:00 UTC1h 5m
2026-05-28 SWR4WF ZRH → PRG May 28, 05:25 UTCMay 28, 06:25 UTC1h 0m
2026-05-27 SWR52F DUS → ZRH May 27, 18:20 UTCMay 27, 19:00 UTC40m
2026-05-27 SWR4WP ZRH → DUS May 27, 16:00 UTCMay 27, 16:50 UTC50m
2026-05-27 SWR123 ICN → ZRH May 27, 02:19 UTCMay 27, 13:55 UTC11h 36m
2026-05-27 SWR123 ICN → ZRH May 27, 00:59 UTCMay 27, 01:19 UTC20m
2026-05-26 SWR122 ZRH → ICN May 26, 22:15 UTCMay 26, 22:35 UTC20m
2026-05-26 SWR122 ZRH → ICN May 26, 11:54 UTCMay 26, 21:40 UTC9h 45m
2026-05-26 SWR3KH PRG → ZRH May 26, 07:59 UTCMay 26, 08:59 UTC1h 0m
2026-05-26 SWR4WF ZRH → PRG May 26, 05:25 UTCMay 26, 06:25 UTC1h 0m
2026-05-25 SWR52F DUS → ZRH May 25, 18:25 UTCMay 25, 19:10 UTC45m
2026-05-25 SWR4WP ZRH → DUS May 25, 16:00 UTCMay 25, 16:50 UTC50m
2026-05-25 SWR123 ICN → ZRH May 25, 06:35 UTCMay 25, 13:35 UTC7h 0m
2026-05-24 SWR122 ZRH → ICN May 24, 23:00 UTCMay 24, 23:10 UTC10m
2026-05-24 SWR122 ZRH → ICN May 24, 12:10 UTCMay 24, 16:00 UTC3h 50m
2026-05-23 SWR2V BOS → ZRH May 23, 22:00 UTCMay 24, 04:35 UTC6h 35m
2026-05-23 SWR54B ZRH → BOS May 23, 12:30 UTCMay 23, 19:50 UTC7h 20m
2026-05-22 SWR2V BOS → ZRH May 22, 21:55 UTCMay 23, 04:20 UTC6h 25m
2026-05-22 SWR54B ZRH → BOS May 22, 11:45 UTCMay 22, 19:10 UTC7h 25m
2026-05-21 SWR2V BOS → ZRH May 21, 21:50 UTCMay 22, 04:15 UTC6h 25m
2026-05-21 SWR54B ZRH → BOS May 21, 11:45 UTCMay 21, 19:15 UTC7h 30m
2026-05-20 SWR2V BOS → ZRH May 20, 22:10 UTCMay 21, 04:45 UTC6h 35m
2026-05-20 SWR54B ZRH → BOS May 20, 11:20 UTCMay 20, 19:05 UTC7h 45m
2026-05-19 SWR2V BOS → ZRH May 19, 22:15 UTCMay 20, 04:50 UTC6h 36m
2026-05-19 SWR54B ZRH → BOS May 19, 11:20 UTCMay 19, 18:40 UTC7h 20m
2026-05-18 SWR2V BOS → ZRH May 18, 21:55 UTCMay 19, 04:35 UTC6h 40m
2026-05-18 SWR54B ZRH → BOS May 18, 11:20 UTCMay 18, 18:40 UTC7h 19m
2026-05-17 SWR2V BOS → ZRH May 17, 22:05 UTCMay 18, 04:40 UTC6h 35m
2026-05-17 SWR54B ZRH → BOS May 17, 11:25 UTCMay 17, 19:01 UTC7h 35m
2026-05-16 SWR123 ICN → ZRH May 16, 09:21 UTCMay 16, 13:25 UTC4h 5m
2026-05-16 SWR123 ICN → ZRH May 16, 01:05 UTCMay 16, 01:25 UTC20m
2026-05-15 SWR122 ZRH → ICN May 15, 22:25 UTCMay 15, 22:40 UTC15m
2026-05-15 SWR122 ZRH → ICN May 15, 11:35 UTCMay 15, 18:10 UTC6h 34m
2026-05-14 SWR2V BOS → ZRH May 14, 22:15 UTCMay 15, 04:45 UTC6h 30m
2026-05-14 SWR54B ZRH → BOS May 14, 11:20 UTCMay 14, 19:00 UTC7h 40m
2026-05-13 SWR2V BOS → ZRH May 13, 21:50 UTCMay 14, 04:30 UTC6h 40m
2026-05-13 SWR54B ZRH → BOS May 13, 11:25 UTCMay 13, 19:05 UTC7h 40m
2026-05-12 SWR2V BOS → ZRH May 12, 21:55 UTCMay 13, 04:35 UTC6h 40m
2026-05-12 SWR54B ZRH → BOS May 12, 11:35 UTCMay 12, 19:15 UTC7h 40m
2026-05-11 SWR2V BOS → ZRH May 11, 22:10 UTCMay 12, 04:35 UTC6h 25m
2026-05-11 SWR54B ZRH → BOS May 11, 11:30 UTCMay 11, 19:00 UTC7h 30m
2026-05-10 SWR2V BOS → ZRH May 10, 21:49 UTCMay 11, 04:35 UTC6h 45m
2026-05-10 SWR54B ZRH → BOS May 10, 12:00 UTCMay 10, 19:15 UTC7h 15m
2026-05-09 SWR2V BOS → ZRH May 9, 21:34 UTCMay 10, 04:25 UTC6h 50m
2026-05-09 SWR54B ZRH → BOS May 9, 11:40 UTCMay 9, 19:14 UTC7h 35m
2026-05-08 SWR2V BOS → ZRH May 8, 22:00 UTCMay 9, 04:50 UTC6h 50m

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

Mode-S 4B15A2 frequently asked

What is Mode-S code 4B15A2?
4B15A2 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-IFA.
Where is Mode-S 4B15A2 registered?
Mode-S code 4B15A2 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B15A2 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B15A2, octal 22612642, decimal 4,920,738.
What flights does 4B15A2 operate?
Mode-S 4B15A2 has broadcast 8 distinct callsigns, including SWR54B, SWR2V, SWR122, SWR123, SWR52F.