Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4B0291

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-AZH · EMBRAER ERJ-190-300

Hex
4B0291
Octal
22601221
Decimal
4,915,857
Country
CH
Tail
HB-AZH
Type
E290
No current signal · last broadcast 5h ago
Flights observed
197
Distinct callsigns
20
Country
CH
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 4B0291.

Country allocation

The ICAO 24-bit address 4B0291 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
OAW223 Helvetic Airways 10 2026-06-18
OAW222 Helvetic Airways 10 2026-06-18
OAW303 Helvetic Airways 6 2026-06-17
OAW302 Helvetic Airways 6 2026-06-17
SWR4AH Swiss International Air Lines 5 2026-05-20
SWR457 Swiss International Air Lines 5 2026-05-20
SWR478V Swiss International Air Lines 4 2026-05-19
SWR3F Swiss International Air Lines 4 2026-05-19
OAW701 Helvetic Airways 4 2026-06-19
OAW5227 Helvetic Airways 4 2026-06-18
OAW5226 Helvetic Airways 4 2026-06-18
SWR7PW Swiss International Air Lines 3 2026-05-15
SWR3VB Swiss International Air Lines 3 2026-05-22
SWR3EZ Swiss International Air Lines 3 2026-05-22
SWR3DY Swiss International Air Lines 3 2026-05-21
SWR1DT Swiss International Air Lines 3 2026-05-21
SWR166M Swiss International Air Lines 3 2026-05-15
OAW707 Helvetic Airways 3 2026-06-12
OAW700 Helvetic Airways 3 2026-06-19
OAW323 Helvetic Airways 3 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-19 OAW701 DJE → BRN Jun 19, 17:04 UTCJun 19, 18:30 UTC1h 25m
2026-06-19 OAW700 BRN → DJE Jun 19, 13:14 UTCJun 19, 15:04 UTC1h 50m
2026-06-19 OAW706 BRN → MIR Jun 19, 06:49 UTCJun 19, 11:45 UTC4h 55m
2026-06-18 OAW223 PMI → BRN Jun 18, 16:50 UTCJun 18, 18:10 UTC1h 20m
2026-06-18 OAW5226 SIR → PMI Jun 18, 14:10 UTCJun 18, 15:15 UTC1h 5m
2026-06-18 OAW5227 PMI → SIR Jun 18, 11:30 UTCJun 18, 12:50 UTC1h 20m
2026-06-18 OAW222 BRN → PMI Jun 18, 09:00 UTCJun 18, 10:40 UTC1h 40m
2026-06-17 OAW303 HER → BRN Jun 17, 10:25 UTCJun 17, 13:15 UTC2h 50m
2026-06-17 OAW302 BRN → HER Jun 17, 06:30 UTCJun 17, 08:50 UTC2h 20m
2026-06-15 OAW223 PMI → BRN Jun 15, 16:49 UTCJun 15, 18:15 UTC1h 25m
2026-06-15 OAW222 BRN → PMI Jun 15, 14:05 UTCJun 15, 15:25 UTC1h 20m
2026-06-15 OAW313 KGS → BRN Jun 15, 10:15 UTCJun 15, 12:55 UTC2h 40m
2026-06-15 OAW312 BRN → KGS Jun 15, 06:00 UTCJun 15, 08:29 UTC2h 30m
2026-06-14 OAW223 PMI → BRN Jun 14, 19:05 UTCJun 14, 20:25 UTC1h 20m
2026-06-14 OAW222 BRN → PMI Jun 14, 16:15 UTCJun 14, 17:40 UTC1h 25m
2026-06-14 OAW323 RHO → BRN Jun 14, 12:25 UTCJun 14, 15:15 UTC2h 50m
2026-06-14 OAW322 BRN → RHO Jun 14, 08:30 UTCJun 14, 11:05 UTC2h 35m
2026-06-13 OAW303 HER → BRN Jun 13, 18:15 UTCJun 13, 20:50 UTC2h 35m
2026-06-13 OAW302 BRN → HER Jun 13, 14:10 UTCJun 13, 16:35 UTC2h 25m
2026-06-12 OAW701 DJE → BRN Jun 12, 16:35 UTCJun 12, 18:35 UTC2h 0m
2026-06-12 OAW700 BRN → DJE Jun 12, 13:05 UTCJun 12, 14:50 UTC1h 45m
2026-06-12 OAW707 MIR → BRN Jun 12, 10:45 UTCJun 12, 12:00 UTC1h 15m
2026-06-12 OAW706 BRN → MIR Jun 12, 06:50 UTCJun 12, 08:25 UTC1h 35m
2026-06-11 OAW223 PMI → BRN Jun 11, 16:50 UTCJun 11, 18:15 UTC1h 25m
2026-06-11 OAW5226 SIR → PMI Jun 11, 14:25 UTCJun 11, 15:35 UTC1h 10m
2026-06-11 OAW5227 PMI → SIR Jun 11, 11:50 UTCJun 11, 13:20 UTC1h 30m
2026-06-11 OAW222 BRN → PMI Jun 11, 09:15 UTCJun 11, 10:40 UTC1h 25m
2026-06-10 OAW303 HER → BRN Jun 10, 10:20 UTCJun 10, 13:05 UTC2h 45m
2026-06-10 OAW302 BRN → HER Jun 10, 06:35 UTCJun 10, 08:55 UTC2h 20m
2026-06-08 OAW223 PMI → BRN Jun 8, 17:30 UTCJun 8, 18:50 UTC1h 20m
2026-06-08 OAW222 BRN → PMI Jun 8, 14:50 UTCJun 8, 16:05 UTC1h 15m
2026-06-08 OAW313 KGS → BRN Jun 8, 10:05 UTCJun 8, 13:05 UTC3h 0m
2026-06-08 OAW312 BRN → KGS Jun 8, 06:00 UTCJun 8, 08:35 UTC2h 35m
2026-06-07 OAW223 PMI → BRN Jun 7, 19:05 UTCJun 7, 20:30 UTC1h 25m
2026-06-07 OAW222 BRN → PMI Jun 7, 16:00 UTCJun 7, 17:20 UTC1h 20m
2026-06-07 OAW323 RHO → BRN Jun 7, 12:05 UTCJun 7, 15:10 UTC3h 5m
2026-06-07 OAW322 BRN → RHO Jun 7, 07:50 UTCJun 7, 10:50 UTC3h 0m
2026-06-06 OAW303 HER → BRN Jun 6, 17:40 UTCJun 6, 20:19 UTC2h 40m
2026-06-06 OAW302 BRN → HER Jun 6, 13:49 UTCJun 6, 16:20 UTC2h 30m
2026-06-05 OAW701 DJE → BRN Jun 5, 16:30 UTCJun 5, 18:35 UTC2h 5m
2026-06-05 OAW700 BRN → DJE Jun 5, 13:10 UTCJun 5, 15:15 UTC2h 5m
2026-06-05 OAW707 MIR → BRN Jun 5, 06:45 UTCJun 5, 11:55 UTC5h 10m
2026-06-04 OAW223 PMI → BRN Jun 4, 19:10 UTCJun 4, 20:25 UTC1h 15m
2026-06-04 OAW5226 SIR → PMI Jun 4, 16:40 UTCJun 4, 17:55 UTC1h 15m
2026-06-04 OAW5227 PMI → SIR Jun 4, 11:50 UTCJun 4, 13:10 UTC1h 20m
2026-06-04 OAW222 BRN → PMI Jun 4, 09:10 UTCJun 4, 10:30 UTC1h 20m
2026-06-03 OAW303 HER → BRN Jun 3, 11:15 UTCJun 3, 13:55 UTC2h 40m
2026-06-03 OAW302 BRN → HER Jun 3, 06:30 UTCJun 3, 09:05 UTC2h 35m
2026-06-01 OAW223 PMI → BRN Jun 1, 16:35 UTCJun 1, 17:55 UTC1h 20m
2026-06-01 OAW222 BRN → PMI Jun 1, 14:00 UTCJun 1, 15:15 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-AZH page for operator, model, and routing details .

Mode-S 4B0291 frequently asked

What is Mode-S code 4B0291?
4B0291 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-AZH.
Where is Mode-S 4B0291 registered?
Mode-S code 4B0291 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B0291 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B0291, octal 22601221, decimal 4,915,857.
What flights does 4B0291 operate?
Mode-S 4B0291 has broadcast 20 distinct callsigns, including OAW223, OAW222, OAW303, OAW302, SWR4AH.