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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
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
318
Distinct callsigns
20
Country
CA
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S C0121E.

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
WJA615 WestJet 6 2026-07-18
WJA277 WestJet 5 2026-04-19
WJA180 WestJet 5 2026-06-02
WJA1500 WestJet 5 2026-06-25
WJA1485 - 5 2026-07-12
WJA1484 - 5 2026-07-12
WJA141 WestJet 5 2026-07-21
WJA483 WestJet 4 2026-07-25
WJA472 - 4 2026-07-06
WJA276 WestJet 4 2026-07-19
WJA2228 - 4 2026-07-07
WJA193 - 4 2026-07-04
WJA181 WestJet 4 2026-06-06
WJA1503 - 4 2026-06-25
WJA107 WestJet 4 2026-07-24
WJA690 - 3 2026-07-18
WJA612 - 3 2026-07-05
WJA555 WestJet 3 2026-07-26
WJA526 WestJet 3 2026-06-06
WJA473 WestJet 3 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WJA555 YSB → YYC Jul 26, 20:45 UTCJul 26, 21:30 UTC45m
2026-07-26 WJA555 YSB → YYC Jul 26, 19:55 UTCJul 26, 20:05 UTC10m
2026-07-26 WJA554 YQQ → YEG Jul 26, 15:50 UTCJul 26, 18:30 UTC2h 40m
2026-07-25 WJA483 YWG → YVR Jul 25, 12:02 UTCJul 26, 05:25 UTC17h 23m
2026-07-25 WJA828 YLW → YWG Jul 25, 05:34 UTCJul 26, 05:25 UTC23h 51m
2026-07-25 WJA829 YWG → YLW Jul 25, 02:05 UTCJul 25, 04:35 UTC2h 30m
2026-07-24 WJA230 YYC → YHZ Jul 24, 23:25 UTCJul 25, 00:55 UTC1h 30m
2026-07-24 WJA110 YVR → YYC Jul 24, 20:50 UTCJul 24, 21:45 UTC55m
2026-07-24 WJA107 YYC → YVR Jul 24, 14:35 UTCJul 24, 15:45 UTC1h 10m
2026-07-24 WJA4037 YFI → YYC Jul 24, 01:00 UTCJul 24, 03:50 UTC2h 50m
2026-07-23 WJA1027 LAX → YYC Jul 23, 01:15 UTCJul 23, 03:40 UTC2h 25m
2026-07-22 WJA1024 YYC → LAX Jul 22, 21:00 UTCJul 22, 23:55 UTC2h 55m
2026-07-22 WJA8949 YFI → YYC Jul 22, 18:05 UTCJul 22, 19:00 UTC55m
2026-07-21 WJA107 YYC → YVR Jul 21, 14:30 UTCJul 21, 15:40 UTC1h 10m
2026-07-21 WJA107 YYC → YVR Jul 21, 14:29 UTCJul 21, 21:35 UTC7h 6m
2026-07-21 WJA141 YEG → YYC Jul 21, 12:15 UTCJul 21, 12:45 UTC30m
2026-07-20 WJA473 YLW → YWG Jul 20, 15:37 UTCJul 21, 15:30 UTC23h 53m
2026-07-20 WJA473 YLW → YWG Jul 20, 15:40 UTCJul 20, 16:40 UTC1h 0m
2026-07-20 WJA159 YEG → YYC Jul 20, 13:35 UTCJul 20, 14:10 UTC35m
2026-07-19 WJA276 YXS → YYC Jul 19, 01:20 UTCJul 19, 18:15 UTC16h 56m
2026-07-18 WJA615 YOW → YVR Jul 18, 17:25 UTCJul 18, 21:30 UTC4h 5m
2026-07-18 WJA615 YOW → YVR Jul 18, 17:23 UTCJul 19, 13:55 UTC20h 33m
2026-07-18 WJA690 - Jul 18, 12:45 UTCJul 18, 16:00 UTC3h 15m
2026-07-17 WJA1475 LAS → YEG Jul 17, 23:55 UTCJul 18, 02:19 UTC2h 25m
2026-07-17 WJA1474 - Jul 17, 19:49 UTCJul 17, 22:29 UTC2h 40m
2026-07-16 WJA484 YEG → YWG Jul 16, 15:06 UTCJul 17, 03:45 UTC12h 39m
2026-07-15 WJA772 - Jul 15, 22:15 UTCJul 15, 23:30 UTC1h 15m
2026-07-15 WJA773 - Jul 15, 19:45 UTCJul 15, 21:05 UTC1h 20m
2026-07-14 WJA231 - Jul 14, 22:05 UTCJul 14, 23:30 UTC1h 24m
2026-07-14 WJA231 YWG → YYC Jul 14, 22:05 UTCJul 15, 21:05 UTC23h 0m
2026-07-14 WJA488 - Jul 14, 19:05 UTCJul 14, 20:35 UTC1h 30m
2026-07-14 WJA144 YYC → YEG Jul 14, 15:35 UTCJul 14, 16:05 UTC30m
2026-07-14 WJA2229 - Jul 14, 07:25 UTCJul 14, 12:05 UTC4h 40m
2026-07-13 WJA143 YEG → YYC Jul 13, 13:06 UTCJul 14, 11:30 UTC22h 25m
2026-07-13 WJA152 - Jul 13, 04:05 UTCJul 13, 04:25 UTC20m
2026-07-13 WJA152 YYC → YEG Jul 13, 04:05 UTCJul 14, 03:30 UTC23h 26m
2026-07-12 WJA1485 - Jul 12, 23:20 UTCJul 13, 01:50 UTC2h 30m
2026-07-12 WJA1484 YYC → SAN Jul 12, 18:30 UTCJul 12, 21:30 UTC3h 0m
2026-07-12 WJA156 YYC → YEG Jul 12, 00:03 UTCJul 12, 23:30 UTC23h 28m
2026-07-12 WJA156 - Jul 12, 00:05 UTCJul 12, 00:25 UTC20m
2026-07-11 WJA1541 - Jul 11, 13:20 UTCJul 11, 17:10 UTC3h 50m
2026-07-10 WJA626 YYC → YYZ Jul 10, 12:41 UTCJul 11, 03:20 UTC14h 40m
2026-07-09 WJA830 - Jul 9, 18:35 UTCJul 9, 22:15 UTC3h 40m
2026-07-09 WJA830 YYC → YQB Jul 9, 18:33 UTCJul 10, 16:05 UTC21h 32m
2026-07-09 WJA4023 - Jul 9, 14:55 UTCJul 9, 15:55 UTC1h 0m
2026-07-09 WJA4022 - Jul 9, 12:50 UTCJul 9, 13:35 UTC45m
2026-07-08 WJA145 - Jul 8, 15:20 UTCJul 8, 15:30 UTC10m
2026-07-08 WJA483 - Jul 8, 12:00 UTCJul 8, 13:45 UTC1h 45m
2026-07-08 WJA483 YWG → YEG Jul 8, 11:59 UTCJul 9, 04:35 UTC16h 37m
2026-07-08 WJA240 YYC → YWG Jul 8, 01:15 UTCJul 8, 02:50 UTC1h 35m

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?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
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 WJA615, WJA277, WJA180, WJA1500, WJA1485.