Apparatus

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sensors Mode-S transponder

C0121E

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FGWJ · BOEING 737-700 · operated by Westjet

Hex
C0121E
Octal
60011036
Decimal
12,587,550
Country
CA
Tail
C-FGWJ
Type
B737
Broadcasting now · callsign WJA1027 · 39,000 ft
Flights observed
150
Distinct callsigns
20
Country
CA
Last broadcast
3h ago

Current position

C0121E is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C0121E 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
WJA277 WestJet 5 2026-04-19
WJA180 WestJet 4 2026-05-20
WJA615 WestJet 3 2026-05-19
WJA2324 WestJet 3 2026-04-25
WJA187 WestJet 3 2026-05-14
WJA1680 - 3 2026-04-13
WJA1412 WestJet 3 2026-04-18
WJA141 WestJet 3 2026-05-22
WJA1161 WestJet 3 2026-04-17
WJA690 WestJet 2 2026-05-13
WJA684 WestJet 2 2026-05-23
WJA636 WestJet 2 2026-05-05
WJA595 WestJet 2 2026-04-13
WJA472 WestJet 2 2026-05-11
WJA463 WestJet 2 2026-04-27
WJA444 WestJet 2 2026-05-07
WJA438 WestJet 2 2026-05-12
WJA437 WestJet 2 2026-05-07
WJA290 WestJet 2 2026-04-20
WJA287 WestJet 2 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 WJA1024 YYC → LAX May 29, 21:00 UTCMay 29, 23:50 UTC2h 50m
2026-05-29 WJA397 YQR → YYC May 29, 17:50 UTCMay 29, 18:50 UTC1h 0m
2026-05-29 WJA392 YEG → YHZ May 29, 15:35 UTCMay 29, 16:25 UTC50m
2026-05-28 WJA2200 YYC → MEX May 28, 14:40 UTCMay 29, 02:30 UTC11h 50m
2026-05-28 WJA2200 YYC → MEX May 28, 14:45 UTCMay 28, 20:10 UTC5h 25m
2026-05-27 WJA347 YXE → YYC May 27, 17:54 UTCMay 28, 17:30 UTC23h 36m
2026-05-27 WJA128 YVR → YYC May 27, 02:35 UTCMay 27, 23:15 UTC20h 40m
2026-05-26 WJA1570 YYC → DEN May 26, 15:04 UTCMay 27, 03:50 UTC12h 46m
2026-05-26 WJA1570 YYC → DEN May 26, 15:05 UTCMay 26, 17:20 UTC2h 15m
2026-05-25 WJA1460 YYC → LAS May 25, 16:25 UTCMay 25, 19:00 UTC2h 35m
2026-05-25 WJA1460 YYC → LAS May 25, 16:24 UTCMay 26, 15:29 UTC23h 6m
2026-05-24 WJA1484 YEG → PSP May 24, 18:05 UTCMay 24, 21:10 UTC3h 5m
2026-05-24 WJA1484 YEG → PSP May 24, 18:01 UTCMay 25, 17:30 UTC23h 30m
2026-05-23 WJA684 YZF → YYC May 23, 20:59 UTCMay 24, 19:25 UTC22h 26m
2026-05-23 WJA684 YZF → YYC May 23, 17:20 UTCMay 23, 22:45 UTC5h 26m
2026-05-22 WJA344 YMM → YYC May 22, 20:40 UTCMay 23, 17:55 UTC21h 15m
2026-05-22 WJA263 YXE → YYC May 22, 15:24 UTCMay 22, 23:40 UTC8h 17m
2026-05-22 WJA141 YEG → YYC May 22, 12:20 UTCMay 22, 12:50 UTC30m
2026-05-22 WJA141 YEG → YYC May 22, 12:15 UTCMay 22, 23:40 UTC11h 26m
2026-05-22 WJA4013 YFI → YEG May 22, 03:35 UTCMay 22, 03:50 UTC15m
2026-05-22 WJA4012 YEG → YFI May 22, 01:35 UTCMay 22, 01:50 UTC15m
2026-05-21 WJA485 YYC → YLW May 21, 18:00 UTCMay 21, 19:45 UTC1h 45m
2026-05-21 WJA484 YEG → YWG May 21, 15:15 UTCMay 21, 16:55 UTC1h 40m
2026-05-20 WJA526 YLW → YEG May 20, 16:17 UTCMay 21, 15:30 UTC23h 14m
2026-05-20 WJA181 YYC → YLW May 20, 14:20 UTCMay 21, 03:30 UTC13h 11m
2026-05-20 WJA180 YLW → YYC May 20, 12:08 UTCMay 21, 03:30 UTC15h 23m
2026-05-20 WJA193 YYC → YXX May 20, 04:09 UTCMay 21, 03:30 UTC23h 22m
2026-05-20 WJA276 YXS → YYC May 20, 01:14 UTCMay 20, 22:15 UTC21h 2m
2026-05-19 WJA269 YWG → YYC May 19, 23:00 UTCMay 20, 00:10 UTC1h 10m
2026-05-19 WJA615 YOW → YVR May 19, 17:35 UTCMay 19, 21:40 UTC4h 5m
2026-05-19 WJA536 YWG → YYZ May 19, 02:42 UTCMay 20, 01:30 UTC22h 48m
2026-05-18 WJA144 YYC → YEG May 18, 15:50 UTCMay 19, 15:15 UTC23h 25m
2026-05-17 WJA1387 AUS → YYC May 17, 22:45 UTCMay 17, 23:30 UTC45m
2026-05-17 WJA1387 AUS → YYC May 17, 22:43 UTCMay 18, 20:30 UTC21h 47m
2026-05-17 WJA1386 YYC → AUS May 17, 17:47 UTCMay 18, 16:20 UTC22h 34m
2026-05-17 WJA1386 YYC → AUS May 17, 17:50 UTCMay 17, 21:35 UTC3h 45m
2026-05-17 WJA128 YVR → YYC May 17, 02:35 UTCMay 17, 03:40 UTC1h 5m
2026-05-16 WJA125 YYC → YVR May 16, 23:50 UTCMay 17, 00:55 UTC1h 5m
2026-05-16 WJA615 YOW → YVR May 16, 17:35 UTCMay 16, 21:40 UTC4h 5m
2026-05-16 WJA512 YLW → YYZ May 16, 02:41 UTCMay 17, 01:00 UTC22h 20m
2026-05-16 WJA511 YYZ → YLW May 16, 00:11 UTCMay 16, 23:30 UTC23h 20m
2026-05-15 WJA530 YYC → YWG May 15, 21:28 UTCMay 16, 19:30 UTC22h 3m
2026-05-15 WJA531 YHM → YYC May 15, 19:25 UTCMay 15, 20:20 UTC55m
2026-05-15 WJA4036 YYC → YFI May 15, 00:43 UTCMay 15, 22:20 UTC21h 37m
2026-05-14 WJA187 YYC → YLW May 14, 20:30 UTCMay 15, 19:30 UTC23h 0m
2026-05-14 WJA342 YYC → YXE May 14, 15:50 UTCMay 15, 14:35 UTC22h 46m
2026-05-14 WJA276 YXS → YYC May 14, 01:35 UTCMay 15, 01:15 UTC23h 41m
2026-05-13 WJA615 YOW → YVR May 13, 17:20 UTCMay 14, 15:25 UTC22h 6m
2026-05-13 WJA690 YVR → YXE May 13, 12:45 UTCMay 13, 13:31 UTC45m
2026-05-13 WJA690 YVR → YXE May 13, 12:40 UTCMay 14, 06:55 UTC18h 16m

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

Mode-S C0121E frequently asked

What is Mode-S code C0121E?
C0121E is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FGWJ.
Where is Mode-S C0121E registered?
Mode-S code C0121E is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C0121E broadcasting right now?
Yes. Mode-S C0121E is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C0121E, octal 60011036, decimal 12,587,550.
What flights does C0121E operate?
Mode-S C0121E has broadcast 20 distinct callsigns, including WJA277, WJA180, WJA615, WJA2324, WJA187.