Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

C03B15

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FWJS · BOEING 737-800 · operated by Westjet

Hex
C03B15
Octal
60035425
Decimal
12,598,037
Country
CA
Tail
C-FWJS
Type
B738
No current signal · last broadcast 3h ago
Flights observed
133
Distinct callsigns
20
Country
CA
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S C03B15.

Country allocation

The ICAO 24-bit address C03B15 falls within the block assigned to Canada (CA) by ICAO Annex 10, Volume III. Every aircraft registered in Canada 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
WJA2609 WestJet 4 2026-04-15
WJA2608 WestJet 4 2026-04-15
WJA1850 WestJet 4 2026-05-23
WJA645 WestJet 3 2026-05-13
WJA436 WestJet 3 2026-04-17
WJA350 WestJet 3 2026-05-20
WJA2605 WestJet 3 2026-04-16
WJA2194 - 3 2026-04-14
WJA2120 - 3 2026-04-13
WJA2112 WestJet 3 2026-04-16
WJA2055 - 3 2026-04-13
WJA150 WestJet 3 2026-05-15
WJA1392 WestJet 3 2026-04-19
WJA858 WestJet 2 2026-05-04
WJA845 WestJet 2 2026-04-17
WJA4001 WestJet 2 2026-04-30
WJA268 WestJet 2 2026-05-17
WJA261 WestJet 2 2026-05-20
WJA2536 WestJet 2 2026-05-06
WJA2113 WestJet 2 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 WJA384 YWG → YYZ May 29, 21:40 UTCMay 29, 23:45 UTC2h 5m
2026-05-29 WJA538 YVR → YWG May 29, 17:00 UTCMay 29, 19:40 UTC2h 40m
2026-05-28 WJA4017 YFI → YEG May 28, 23:49 UTCMay 29, 23:15 UTC23h 26m
2026-05-28 WJA137 YYC → YVR May 28, 05:40 UTCMay 28, 06:40 UTC1h 0m
2026-05-28 WJA137 YYC → YVR May 28, 05:39 UTCMay 29, 00:35 UTC18h 56m
2026-05-28 WJA4033 YFI → YYC May 28, 00:30 UTCMay 28, 03:30 UTC3h 0m
2026-05-27 WJA116 YVR → YYC May 27, 21:25 UTCMay 27, 22:40 UTC1h 15m
2026-05-27 WJA109 YYC → YVR May 27, 15:50 UTCMay 27, 16:50 UTC1h 0m
2026-05-27 WJA401 YYC → YYJ May 27, 13:05 UTCMay 27, 14:05 UTC1h 0m
2026-05-26 WJA102 YVR → YYC May 26, 13:10 UTCMay 26, 14:20 UTC1h 10m
2026-05-26 WJA102 YVR → YYC May 26, 13:09 UTCMay 27, 06:55 UTC17h 46m
2026-05-26 WJA129 YYC → YVR May 26, 02:29 UTCMay 26, 03:40 UTC1h 10m
2026-05-25 WJA122 YVR → YYC May 25, 23:40 UTCMay 26, 00:39 UTC1h 0m
2026-05-25 WJA129 YYC → YVR May 25, 02:44 UTCMay 26, 00:44 UTC22h 1m
2026-05-24 WJA1863 HNL → YVR May 24, 08:15 UTCMay 24, 08:30 UTC15m
2026-05-24 WJA1863 HNL → YVR May 24, 08:15 UTCMay 25, 07:10 UTC22h 56m
2026-05-24 WJA1862 YVR → HNL May 24, 06:05 UTCMay 24, 06:20 UTC15m
2026-05-23 WJA1851 OGG → YVR May 23, 08:45 UTCMay 24, 06:20 UTC21h 36m
2026-05-23 WJA1850 YVR → OGG May 23, 01:44 UTCMay 24, 01:15 UTC23h 32m
2026-05-22 WJA1723 PSP → YVR May 22, 20:05 UTCMay 22, 22:45 UTC2h 40m
2026-05-22 WJA1723 PSP → YVR May 22, 20:03 UTCMay 23, 14:15 UTC18h 12m
2026-05-22 WJA1722 YVR → PSP May 22, 16:25 UTCMay 22, 18:35 UTC2h 10m
2026-05-21 WJA125 YYC → YVR May 21, 23:25 UTCMay 22, 00:30 UTC1h 5m
2026-05-21 WJA149 YEG → YYC May 21, 21:10 UTCMay 21, 21:40 UTC30m
2026-05-20 WJA261 YWG → YYC May 20, 14:30 UTCMay 20, 15:15 UTC45m
2026-05-20 WJA261 YWG → YYC May 20, 14:30 UTCMay 20, 18:15 UTC3h 46m
2026-05-20 WJA343 YQT → YYC May 20, 12:05 UTCMay 20, 13:00 UTC55m
2026-05-20 WJA350 YYC → YQR May 20, 06:25 UTCMay 20, 07:15 UTC50m
2026-05-19 WJA8951 YQM → YHZ May 19, 23:50 UTCMay 20, 01:30 UTC1h 40m
2026-05-18 WJA240 YEG → YYC May 18, 01:41 UTCMay 18, 03:20 UTC1h 40m
2026-05-17 WJA268 YYC → YWG May 17, 22:45 UTCMay 17, 23:55 UTC1h 10m
2026-05-17 WJA268 YYC → YWG May 17, 22:43 UTCMay 18, 03:20 UTC4h 38m
2026-05-17 WJA267 YWG → YYC May 17, 20:15 UTCMay 17, 21:25 UTC1h 10m
2026-05-17 WJA1087 LAS → YYC May 17, 15:45 UTCMay 17, 18:01 UTC2h 15m
2026-05-16 WJA1020 YYC → LAX May 16, 16:33 UTCMay 17, 04:30 UTC11h 58m
2026-05-16 WJA627 YYT → YYZ May 16, 10:35 UTCMay 17, 04:30 UTC17h 56m
2026-05-15 WJA455 YYC → YXX May 15, 18:34 UTCMay 16, 17:15 UTC22h 42m
2026-05-15 WJA150 YYC → YEG May 15, 03:40 UTCMay 15, 04:05 UTC25m
2026-05-15 WJA150 YYC → YEG May 15, 03:36 UTCMay 16, 03:15 UTC23h 39m
2026-05-14 WJA1485 PSP → YEG May 14, 22:40 UTCMay 15, 01:40 UTC3h 0m
2026-05-14 WJA1484 YEG → PSP May 14, 18:05 UTCMay 14, 21:00 UTC2h 55m
2026-05-13 WJA645 YXE → YYC May 13, 20:05 UTCMay 13, 23:15 UTC3h 10m
2026-05-13 WJA645 YXE → YYC May 13, 20:05 UTCMay 14, 19:15 UTC23h 11m
2026-05-10 WJA1037 TPA → YYT May 10, 21:25 UTCMay 10, 23:44 UTC2h 20m
2026-05-10 WJA1410 YYC → MCO May 10, 15:09 UTCMay 10, 19:45 UTC4h 35m
2026-05-10 WJA393 YQR → YYC May 10, 12:05 UTCMay 10, 13:10 UTC1h 5m
2026-05-10 WJA396 YYC → YQR May 10, 04:00 UTCMay 10, 04:50 UTC50m
2026-05-09 WJA1431 BNA → YYC May 9, 00:13 UTCMay 9, 04:25 UTC4h 12m
2026-05-08 WJA1430 YEG → LAX May 8, 19:35 UTCMay 8, 22:40 UTC3h 5m
2026-05-08 WJA1430 YEG → LAX May 8, 19:34 UTCMay 9, 04:25 UTC8h 51m

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 C-FWJS page for operator, model, and routing details .

Mode-S C03B15 frequently asked

What is Mode-S code C03B15?
C03B15 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FWJS.
Where is Mode-S C03B15 registered?
Mode-S code C03B15 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C03B15 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 C03B15, octal 60035425, decimal 12,598,037.
What flights does C03B15 operate?
Mode-S C03B15 has broadcast 20 distinct callsigns, including WJA2609, WJA2608, WJA1850, WJA645, WJA436.