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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 2h ago
Flights observed
285
Distinct callsigns
20
Country
CA
Last broadcast
2h ago

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
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
WJA615 - 4 2026-07-03
WJA472 - 4 2026-07-06
WJA2228 - 4 2026-07-07
WJA193 - 4 2026-07-04
WJA181 WestJet 4 2026-06-06
WJA1503 - 4 2026-06-25
WJA141 - 4 2026-06-25
WJA612 - 3 2026-07-05
WJA526 WestJet 3 2026-06-06
WJA483 - 3 2026-07-08
WJA276 - 3 2026-07-04
WJA2324 WestJet 3 2026-04-25
WJA228 - 3 2026-06-27
WJA187 WestJet 3 2026-05-14
WJA1680 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 WJA143 YEG → YYC Jul 13, 13:06 UTCJul 14, 05:10 UTC16h 5m
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
2026-07-07 WJA476 - Jul 7, 22:50 UTCJul 7, 23:50 UTC1h 0m
2026-07-07 WJA475 - Jul 7, 20:35 UTCJul 7, 21:40 UTC1h 5m
2026-07-07 WJA110 YVR → YYC Jul 7, 17:55 UTCJul 7, 18:55 UTC1h 0m
2026-07-07 WJA107 YYC → YVR Jul 7, 14:40 UTCJul 7, 15:50 UTC1h 10m
2026-07-07 WJA2229 - Jul 7, 07:45 UTCJul 7, 12:45 UTC5h 0m
2026-07-07 WJA2228 - Jul 7, 06:05 UTCJul 7, 06:10 UTC5m
2026-07-07 WJA2228 - Jul 7, 01:35 UTCJul 7, 05:25 UTC3h 50m
2026-07-06 WJA151 - Jul 6, 22:45 UTCJul 6, 23:15 UTC30m
2026-07-06 WJA148 YYC → YEG Jul 6, 20:40 UTCJul 6, 21:10 UTC30m
2026-07-06 WJA472 - Jul 6, 17:55 UTCJul 6, 18:55 UTC1h 0m
2026-07-06 WJA473 - Jul 6, 15:45 UTCJul 6, 16:45 UTC1h 0m
2026-07-06 WJA143 YEG → YYC Jul 6, 13:15 UTCJul 6, 13:45 UTC30m
2026-07-05 WJA612 YYC → YOW Jul 5, 17:45 UTCJul 6, 16:45 UTC23h 0m
2026-07-05 WJA612 - Jul 5, 17:45 UTCJul 5, 19:30 UTC1h 45m
2026-07-05 WJA184 - Jul 5, 14:55 UTCJul 5, 15:40 UTC45m
2026-07-05 WJA525 - Jul 5, 12:55 UTCJul 5, 13:45 UTC50m
2026-07-04 WJA1424 YEG → LAX Jul 4, 19:28 UTCJul 5, 17:30 UTC22h 3m
2026-07-04 WJA193 YYC → YLW Jul 4, 04:17 UTCJul 5, 03:05 UTC22h 48m
2026-07-04 WJA193 YYC → YLW Jul 4, 04:20 UTCJul 4, 05:10 UTC50m
2026-07-04 WJA276 - Jul 4, 01:35 UTCJul 4, 02:40 UTC1h 5m
2026-07-03 WJA269 - Jul 3, 23:05 UTCJul 4, 00:20 UTC1h 15m
2026-07-03 WJA615 - Jul 3, 17:35 UTCJul 3, 21:45 UTC4h 10m
2026-07-02 WJA691 - Jul 2, 22:35 UTCJul 3, 02:30 UTC3h 55m
2026-07-02 WJA691 YOW → YEG Jul 2, 22:30 UTCJul 3, 21:30 UTC23h 1m
2026-07-02 WJA612 - Jul 2, 17:50 UTCJul 2, 21:10 UTC3h 20m
2026-07-02 WJA669 YYZ → YYC Jul 2, 11:00 UTCJul 2, 16:20 UTC5h 20m
2026-07-01 WJA4003 YFI → YEG Jul 1, 14:23 UTCJul 2, 12:45 UTC22h 22m
2026-07-01 WJA4003 YFI → YEG Jul 1, 12:35 UTCJul 1, 15:15 UTC2h 40m
2026-07-01 WJA322 YVR → YEG Jul 1, 05:30 UTCJul 1, 06:40 UTC1h 10m
2026-06-30 WJA2121 - Jun 30, 15:55 UTCJul 1, 02:15 UTC10h 20m
2026-06-29 WJA530 YLW → YEG Jun 29, 21:38 UTCJun 30, 19:10 UTC21h 33m
2026-06-29 WJA531 YHM → YYC Jun 29, 19:39 UTCJun 29, 20:35 UTC55m
2026-06-29 WJA496 - Jun 29, 01:05 UTCJun 29, 02:45 UTC1h 40m

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 2h ago.
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, WJA1500, WJA1485, WJA1484.