Apparatus

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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 Jul 26, 21:15 UTC
Flights observed
303
Distinct callsigns
20
Country
CA
Last broadcast
Jul 26, 21:15 UTC

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
WJA1862 - 5 2026-07-10
WJA1850 - 5 2026-06-14
WJA171 - 5 2026-07-10
WJA719 - 4 2026-07-08
WJA2609 WestJet 4 2026-04-15
WJA2608 WestJet 4 2026-04-15
WJA170 - 4 2026-07-05
WJA1057 - 4 2026-07-09
WJA102 WestJet 4 2026-07-26
WJA858 - 3 2026-07-12
WJA645 WestJet 3 2026-05-13
WJA538 WestJet 3 2026-07-25
WJA436 WestJet 3 2026-04-17
WJA384 WestJet 3 2026-07-25
WJA350 WestJet 3 2026-05-20
WJA315 WestJet 3 2026-07-22
WJA308 WestJet 3 2026-07-22
WJA268 - 3 2026-06-29
WJA2605 WestJet 3 2026-04-16
WJA224 WestJet 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WJA187 YYC → YLW Jul 26, 20:30 UTCJul 26, 21:15 UTC45m
2026-07-26 WJA186 YYJ → YYC Jul 26, 18:30 UTCJul 26, 19:15 UTC45m
2026-07-26 WJA183 YEG → YVR Jul 26, 16:30 UTCJul 26, 17:15 UTC45m
2026-07-26 WJA102 YVR → YYC Jul 26, 13:15 UTCJul 26, 14:15 UTC1h 0m
2026-07-26 WJA731 YYZ → YVR Jul 26, 02:45 UTCJul 26, 07:40 UTC4h 56m
2026-07-25 WJA384 YWG → YYZ Jul 25, 21:35 UTCJul 25, 23:30 UTC1h 55m
2026-07-25 WJA538 YVR → YWG Jul 25, 17:00 UTCJul 25, 19:15 UTC2h 15m
2026-07-24 WJA118 YVR → YYC Jul 24, 21:52 UTCJul 25, 19:20 UTC21h 28m
2026-07-24 WJA109 YYC → YVR Jul 24, 15:55 UTCJul 24, 17:05 UTC1h 10m
2026-07-23 WJA231 YHZ → YYC Jul 23, 22:25 UTCJul 24, 00:20 UTC1h 55m
2026-07-23 WJA488 YEG → YWG Jul 23, 19:40 UTCJul 23, 21:15 UTC1h 35m
2026-07-23 WJA146 YEG → YWG Jul 23, 17:50 UTCJul 23, 18:20 UTC30m
2026-07-23 WJA104 YVR → YYC Jul 23, 15:40 UTCJul 23, 16:40 UTC1h 0m
2026-07-22 WJA315 YFC → YYC Jul 22, 21:10 UTCJul 22, 22:25 UTC1h 15m
2026-07-22 WJA308 YVR → YEG Jul 22, 18:30 UTCJul 22, 19:35 UTC1h 5m
2026-07-22 WJA109 YYC → YVR Jul 22, 15:45 UTCJul 22, 16:55 UTC1h 10m
2026-07-21 WJA1811 LAS → YLW Jul 21, 20:10 UTCJul 22, 19:15 UTC23h 5m
2026-07-21 WJA1507 SFO → YYC Jul 21, 02:35 UTCJul 22, 01:15 UTC22h 40m
2026-07-20 WJA1550 YYC → SEA Jul 20, 16:05 UTCJul 21, 13:20 UTC21h 15m
2026-07-20 WJA401 YQR → YYC Jul 20, 13:00 UTCJul 21, 06:55 UTC17h 55m
2026-07-19 WJA392 YEG → YHZ Jul 19, 15:30 UTCJul 20, 14:30 UTC23h 1m
2026-07-18 WJA1024 YYC → LAX Jul 18, 21:10 UTCJul 19, 00:15 UTC3h 5m
2026-07-18 WJA1024 YYC → LAX Jul 18, 21:10 UTCJul 19, 19:15 UTC22h 6m
2026-07-18 WJA608 YYC → YOW Jul 18, 01:08 UTCJul 18, 23:15 UTC22h 8m
2026-07-18 WJA608 - Jul 18, 01:10 UTCJul 18, 04:20 UTC3h 11m
2026-07-17 WJA552 YCD → YYC Jul 17, 19:55 UTCJul 17, 21:00 UTC1h 5m
2026-07-17 WJA553 YYC → YCD Jul 17, 17:25 UTCJul 17, 18:34 UTC1h 10m
2026-07-16 WJA1503 SFO → YYC Jul 16, 21:55 UTCJul 17, 00:04 UTC2h 10m
2026-07-16 WJA1500 YYC → SFO Jul 16, 17:35 UTCJul 16, 20:09 UTC2h 35m
2026-07-16 WJA627 YYZ → YYC Jul 16, 10:10 UTCJul 16, 14:00 UTC3h 50m
2026-07-15 WJA646 YYC → YYZ Jul 15, 21:40 UTCJul 16, 00:45 UTC3h 5m
2026-07-15 WJA639 YYZ → YYC Jul 15, 16:10 UTCJul 15, 20:00 UTC3h 50m
2026-07-14 WJA640 YYC → YYZ Jul 14, 20:30 UTCJul 14, 23:35 UTC3h 4m
2026-07-14 WJA637 YYZ → YYC Jul 14, 15:00 UTCJul 14, 18:55 UTC3h 55m
2026-07-14 WJA380 YWG → YYZ Jul 14, 11:25 UTCJul 14, 13:20 UTC1h 55m
2026-07-13 WJA710 - Jul 13, 16:15 UTCJul 13, 20:10 UTC3h 55m
2026-07-13 WJA710 YVR → YYZ Jul 13, 16:11 UTCJul 14, 15:15 UTC23h 5m
2026-07-13 WJA731 YYZ → YVR Jul 13, 03:05 UTCJul 13, 07:40 UTC4h 35m
2026-07-12 WJA454 - Jul 12, 21:55 UTCJul 13, 00:55 UTC3h 0m
2026-07-12 WJA449 - Jul 12, 16:15 UTCJul 12, 20:05 UTC3h 50m
2026-07-12 WJA859 YUL → YYZ Jul 12, 11:05 UTCJul 12, 11:55 UTC50m
2026-07-12 WJA858 YYZ → YUL Jul 12, 03:10 UTCJul 12, 04:05 UTC55m
2026-07-11 WJA642 YYC → YYZ Jul 11, 20:45 UTCJul 11, 23:55 UTC3h 10m
2026-07-10 WJA171 YEG → YVR Jul 10, 21:42 UTCJul 11, 21:15 UTC23h 34m
2026-07-10 WJA308 YVR → YEG Jul 10, 18:25 UTCJul 10, 19:30 UTC1h 5m
2026-07-10 WJA1862 YVR → HNL Jul 10, 00:59 UTCJul 10, 23:15 UTC22h 17m
2026-07-09 WJA1057 LAS → YVR Jul 9, 20:39 UTCJul 10, 19:15 UTC22h 36m
2026-07-09 WJA1057 LAS → YVR Jul 9, 20:40 UTCJul 9, 23:00 UTC2h 20m
2026-07-09 WJA1056 YVR → LAS Jul 9, 16:50 UTCJul 9, 19:00 UTC2h 10m
2026-07-08 WJA719 YYZ → YVR Jul 8, 20:25 UTCJul 9, 01:10 UTC4h 45m

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 Jul 26, 21:15 UTC.
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 WJA1862, WJA1850, WJA171, WJA719, WJA2609.