Apparatus

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sensors Mode-S transponder

C01C28

ICAO 24-bit transponder address · allocated to Canada

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

Hex
C01C28
Octal
60016050
Decimal
12,590,120
Country
CA
Tail
C-FKRF
Type
B738
Broadcasting now · callsign WJA2053 · 36,000 ft
Flights observed
136
Distinct callsigns
20
Country
CA
Last broadcast
49m ago

Current position

C01C28 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C01C28 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
WJA1461 WestJet 4 2026-04-15
WJA135 WestJet 4 2026-05-24
WJA1091 WestJet 4 2026-05-12
WJA317 WestJet 3 2026-05-18
WJA297 WestJet 3 2026-04-16
WJA267 WestJet 3 2026-05-01
WJA2409 WestJet 3 2026-04-17
WJA1863 WestJet 3 2026-05-09
WJA1601 WestJet 3 2026-05-26
WJA1468 - 3 2026-04-15
WJA1057 WestJet 3 2026-05-08
WJA105 WestJet 3 2026-05-18
WJA1023 WestJet 3 2026-05-22
WJA794 WestJet 2 2026-05-21
WJA793 WestJet 2 2026-04-27
WJA554 WestJet 2 2026-04-17
WJA553 - 2 2026-04-17
WJA538 WestJet 2 2026-05-19
WJA516 - 2 2026-04-13
WJA304 WestJet 2 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 WJA2052 YVR → CUN May 29, 15:15 UTCMay 29, 21:00 UTC5h 45m
2026-05-29 WJA2052 YVR → CUN May 29, 15:14 UTCMay 30, 00:00 UTC8h 47m
2026-05-28 WJA463 YYC → YYJ May 28, 21:27 UTCMay 29, 19:50 UTC22h 23m
2026-05-28 WJA444 YEG → YYZ May 28, 15:33 UTCMay 29, 05:35 UTC14h 2m
2026-05-28 WJA4019 YFI → YEG May 28, 02:33 UTCMay 29, 01:10 UTC22h 37m
2026-05-27 WJA146 YEG → YWG May 27, 17:15 UTCMay 27, 17:40 UTC25m
2026-05-27 WJA146 YEG → YWG May 27, 17:12 UTCMay 28, 16:00 UTC22h 48m
2026-05-27 WJA104 YVR → YYC May 27, 14:40 UTCMay 27, 15:45 UTC1h 5m
2026-05-26 WJA1601 ATL → YVR May 26, 13:34 UTCMay 26, 18:10 UTC4h 35m
2026-05-25 WJA310 YQQ → YYC May 25, 21:49 UTCMay 26, 18:14 UTC20h 26m
2026-05-25 WJA109 YYC → YVR May 25, 15:45 UTCMay 26, 14:00 UTC22h 15m
2026-05-25 WJA398 YEG → YHZ May 25, 05:56 UTCMay 26, 02:10 UTC20h 14m
2026-05-24 WJA102 YVR → YYC May 24, 13:02 UTCMay 25, 06:45 UTC17h 43m
2026-05-24 WJA135 YYC → YVR May 24, 03:15 UTCMay 24, 04:30 UTC1h 15m
2026-05-24 WJA135 YYC → YVR May 24, 03:14 UTCMay 25, 02:00 UTC22h 47m
2026-05-23 WJA2241 PVR → YYC May 23, 14:35 UTCMay 24, 01:05 UTC10h 31m
2026-05-22 WJA1023 TPA → YYZ May 22, 20:25 UTCMay 22, 23:10 UTC2h 45m
2026-05-22 WJA1023 TPA → YYZ May 22, 20:21 UTCMay 23, 17:35 UTC21h 14m
2026-05-22 WJA1020 YYC → LAX May 22, 16:15 UTCMay 22, 18:50 UTC2h 35m
2026-05-21 WJA795 YFC → YYC May 21, 21:15 UTCMay 21, 22:00 UTC45m
2026-05-21 WJA794 YYC → YFC May 21, 15:53 UTCMay 22, 02:05 UTC10h 13m
2026-05-21 WJA794 YYC → YFC May 21, 15:55 UTCMay 21, 19:50 UTC3h 55m
2026-05-21 WJA102 YVR → YYC May 21, 13:15 UTCMay 21, 14:20 UTC1h 5m
2026-05-21 WJA129 YYC → YVR May 21, 02:40 UTCMay 21, 03:40 UTC1h 0m
2026-05-20 WJA122 YVR → YYC May 20, 23:55 UTCMay 21, 01:00 UTC1h 5m
2026-05-19 WJA538 YVR → YWG May 19, 17:04 UTCMay 20, 07:45 UTC14h 42m
2026-05-18 WJA317 YHZ → YEG May 18, 23:00 UTCMay 19, 00:10 UTC1h 10m
2026-05-18 WJA317 YHZ → YEG May 18, 22:59 UTCMay 19, 22:00 UTC23h 1m
2026-05-18 WJA304 YVR → YEG May 18, 20:35 UTCMay 18, 21:45 UTC1h 10m
2026-05-18 WJA105 YYC → YVR May 18, 13:25 UTCMay 18, 14:35 UTC1h 10m
2026-05-17 WJA1681 JFK → YYC May 17, 22:05 UTCMay 18, 02:40 UTC4h 35m
2026-05-17 WJA1680 YYC → JFK May 17, 16:20 UTCMay 17, 20:35 UTC4h 15m
2026-05-17 WJA155 YEG → YYC May 17, 01:40 UTCMay 17, 02:00 UTC20m
2026-05-16 WJA156 YYC → YEG May 16, 23:44 UTCMay 17, 22:01 UTC22h 17m
2026-05-16 WJA156 YYC → YEG May 16, 23:45 UTCMay 17, 00:15 UTC30m
2026-05-16 WJA1161 PHX → YYC May 16, 19:30 UTCMay 16, 20:10 UTC40m
2026-05-16 WJA1161 PHX → YYC May 16, 15:25 UTCMay 16, 18:35 UTC3h 10m
2026-05-16 WJA1168 YYC → PHX May 16, 02:05 UTCMay 16, 04:45 UTC2h 40m
2026-05-15 WJA273 YHZ → YYZ May 15, 05:09 UTCMay 16, 04:00 UTC22h 51m
2026-05-14 WJA2280 YYC → SJD May 14, 18:07 UTCMay 15, 18:00 UTC23h 53m
2026-05-14 WJA2280 YYC → SJD May 14, 18:10 UTCMay 14, 21:20 UTC3h 10m
2026-05-13 WJA478 YXX → YYC May 13, 03:50 UTCMay 13, 04:45 UTC55m
2026-05-13 WJA479 YYC → YLW May 13, 01:35 UTCMay 13, 02:45 UTC1h 10m
2026-05-12 WJA1091 LAS → YYC May 12, 21:20 UTCMay 12, 23:45 UTC2h 25m
2026-05-12 WJA1088 YYC → LAS May 12, 17:15 UTCMay 12, 19:45 UTC2h 30m
2026-05-12 WJA136 YVR → YYC May 12, 13:51 UTCMay 12, 14:55 UTC1h 5m
2026-05-12 WJA135 YYC → YVR May 12, 03:10 UTCMay 12, 04:20 UTC1h 10m
2026-05-11 WJA1023 TPA → YYZ May 11, 20:35 UTCMay 11, 22:35 UTC1h 59m
2026-05-11 WJA1020 YYC → LAX May 11, 16:30 UTCMay 11, 19:20 UTC2h 50m
2026-05-10 WJA1621 DTW → YYC May 10, 22:12 UTCMay 11, 22:00 UTC23h 49m

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

Mode-S C01C28 frequently asked

What is Mode-S code C01C28?
C01C28 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FKRF.
Where is Mode-S C01C28 registered?
Mode-S code C01C28 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C01C28 broadcasting right now?
Yes. Mode-S C01C28 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C01C28, octal 60016050, decimal 12,590,120.
What flights does C01C28 operate?
Mode-S C01C28 has broadcast 20 distinct callsigns, including WJA1461, WJA135, WJA1091, WJA317, WJA297.