Apparatus

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sensors Mode-S transponder

C03BF1

ICAO 24-bit transponder address · allocated to Canada

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

Hex
C03BF1
Octal
60035761
Decimal
12,598,257
Country
CA
Tail
C-FWSE
Type
B738
No current signal · last broadcast 11h ago
Flights observed
135
Distinct callsigns
20
Country
CA
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S C03BF1.

Country allocation

The ICAO 24-bit address C03BF1 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
WJA146 WestJet 5 2026-05-24
WJA1034 WestJet 5 2026-05-01
WJA659 WestJet 4 2026-04-18
WJA444 WestJet 4 2026-05-25
WJA104 WestJet 4 2026-05-24
WJA1035 WestJet 4 2026-04-17
WJA748 WestJet 3 2026-05-18
WJA573 - 3 2026-04-13
WJA321 WestJet 3 2026-05-26
WJA2134 WestJet 3 2026-04-21
WJA2027 WestJet 3 2026-04-17
WJA2026 WestJet 3 2026-04-17
WJA183 WestJet 3 2026-05-18
WJA984 WestJet 2 2026-04-25
WJA655 WestJet 2 2026-05-03
WJA488 WestJet 2 2026-04-30
WJA384 - 2 2026-04-16
WJA383 WestJet 2 2026-04-16
WJA307 WestJet 2 2026-05-08
WJA2843 - 2 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 WJA1050 YHZ → DTW May 29, 19:00 UTCMay 29, 21:20 UTC2h 20m
2026-05-29 WJA1050 YHZ → DTW May 29, 18:58 UTCMay 30, 00:35 UTC5h 37m
2026-05-29 WJA800 YYZ → YHZ May 29, 11:45 UTCMay 29, 13:30 UTC1h 45m
2026-05-29 WJA720 YVR → YYZ May 29, 00:50 UTCMay 29, 05:00 UTC4h 10m
2026-05-28 WJA541 YWG → YVR May 28, 20:25 UTCMay 28, 23:00 UTC2h 35m
2026-05-27 WJA593 YHZ → YWG May 27, 22:30 UTCMay 28, 02:05 UTC3h 35m
2026-05-27 WJA592 YYZ → YUL May 27, 18:15 UTCMay 27, 21:15 UTC3h 0m
2026-05-26 WJA321 YQR → YEG May 26, 03:37 UTCMay 26, 20:50 UTC17h 13m
2026-05-25 WJA463 YYC → YYJ May 25, 21:33 UTCMay 26, 20:15 UTC22h 42m
2026-05-25 WJA444 YEG → YYZ May 25, 15:42 UTCMay 26, 05:10 UTC13h 28m
2026-05-25 WJA536 YWG → YYZ May 25, 02:49 UTCMay 26, 01:24 UTC22h 36m
2026-05-24 WJA146 YEG → YWG May 24, 17:36 UTCMay 25, 16:15 UTC22h 40m
2026-05-24 WJA104 YVR → YYC May 24, 14:40 UTCMay 24, 15:40 UTC1h 0m
2026-05-24 WJA104 YVR → YYC May 24, 14:38 UTCMay 25, 03:40 UTC13h 3m
2026-05-23 WJA719 YYZ → YVR May 23, 21:10 UTCMay 24, 01:55 UTC4h 45m
2026-05-23 WJA444 YEG → YYZ May 23, 15:50 UTCMay 23, 19:20 UTC3h 30m
2026-05-23 WJA1475 PSP → YYC May 23, 00:10 UTCMay 23, 00:15 UTC5m
2026-05-23 WJA1475 PSP → YYC May 23, 00:07 UTCMay 23, 22:15 UTC22h 9m
2026-05-22 WJA1474 YYC → PSP May 22, 20:10 UTCMay 22, 22:40 UTC2h 30m
2026-05-22 WJA1474 YYC → PSP May 22, 20:07 UTCMay 23, 18:15 UTC22h 9m
2026-05-22 WJA146 YEG → YWG May 22, 17:10 UTCMay 22, 17:40 UTC30m
2026-05-22 WJA104 YVR → YYC May 22, 14:40 UTCMay 22, 15:40 UTC1h 0m
2026-05-21 WJA444 YEG → YYZ May 21, 15:45 UTCMay 21, 19:00 UTC3h 15m
2026-05-21 WJA444 YEG → YYZ May 21, 15:40 UTCMay 22, 05:15 UTC13h 36m
2026-05-20 WJA154 YYJ → YYC May 20, 05:53 UTCMay 20, 23:35 UTC17h 43m
2026-05-20 WJA1093 LAS → YYC May 20, 01:51 UTCMay 20, 23:35 UTC21h 45m
2026-05-19 WJA1090 YYC → LAS May 19, 21:56 UTCMay 20, 20:15 UTC22h 20m
2026-05-19 WJA188 YLW → YYC May 19, 19:46 UTCMay 20, 06:10 UTC10h 25m
2026-05-19 WJA185 YYC → YYJ May 19, 17:54 UTCMay 20, 06:10 UTC12h 17m
2026-05-18 WJA9532 YWG → YXE May 18, 23:54 UTCMay 19, 22:15 UTC22h 21m
2026-05-18 WJA186 YYJ → YYC May 18, 18:00 UTCMay 18, 18:15 UTC15m
2026-05-18 WJA183 YEG → YVR May 18, 15:40 UTCMay 18, 16:25 UTC45m
2026-05-18 WJA183 YEG → YVR May 18, 15:39 UTCMay 19, 14:15 UTC22h 36m
2026-05-18 WJA747 YXU → YYC May 18, 10:30 UTCMay 18, 14:10 UTC3h 40m
2026-05-18 WJA748 YYC → YQY May 18, 05:50 UTCMay 18, 09:15 UTC3h 25m
2026-05-17 WJA567 YKF → YYC May 17, 21:35 UTCMay 18, 01:55 UTC4h 20m
2026-05-17 WJA748 YYC → YQY May 17, 05:59 UTCMay 18, 02:05 UTC20h 7m
2026-05-17 WJA748 YYC → YQY May 17, 06:00 UTCMay 17, 09:05 UTC3h 5m
2026-05-16 WJA2201 CUN → YYC May 16, 21:25 UTCMay 17, 02:50 UTC5h 25m
2026-05-16 WJA2200 YYC → MEX May 16, 15:05 UTCMay 16, 20:05 UTC5h 0m
2026-05-15 WJA1731 IAD → YYC May 15, 23:55 UTCMay 16, 04:10 UTC4h 15m
2026-05-15 WJA1730 YYC → IAD May 15, 18:20 UTCMay 15, 22:10 UTC3h 50m
2026-05-14 WJA2241 PVR → YYC May 14, 20:31 UTCMay 15, 20:15 UTC23h 44m
2026-05-14 WJA2240 YYC → PVR May 14, 14:35 UTCMay 15, 01:20 UTC10h 45m
2026-05-13 WJA133 YYC → YVR May 13, 04:10 UTCMay 13, 05:20 UTC1h 10m
2026-05-13 WJA133 YYC → YVR May 13, 04:10 UTCMay 13, 14:30 UTC10h 21m
2026-05-11 WJA186 YYJ → YYC May 11, 18:05 UTCMay 12, 04:20 UTC10h 16m
2026-05-11 WJA183 YEG → YVR May 11, 16:10 UTCMay 11, 16:50 UTC40m
2026-05-10 WJA813 YQM → YYC May 10, 21:21 UTCMay 11, 20:15 UTC22h 55m
2026-05-10 WJA812 YYC → YQM May 10, 15:41 UTCMay 11, 13:20 UTC21h 39m

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

Mode-S C03BF1 frequently asked

What is Mode-S code C03BF1?
C03BF1 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FWSE.
Where is Mode-S C03BF1 registered?
Mode-S code C03BF1 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C03BF1 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C03BF1, octal 60035761, decimal 12,598,257.
What flights does C03BF1 operate?
Mode-S C03BF1 has broadcast 20 distinct callsigns, including WJA146, WJA1034, WJA659, WJA444, WJA104.