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 WJA1026 · 750 ft
Flights observed
242
Distinct callsigns
20
Country
CA
Last broadcast
1h 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
WJA135 - 6 2026-07-08
WJA136 - 5 2026-07-08
WJA1091 - 5 2026-07-13
WJA1057 - 5 2026-06-30
WJA538 WestJet 4 2026-06-03
WJA267 WestJet 4 2026-06-06
WJA1863 WestJet 4 2026-05-31
WJA1461 WestJet 4 2026-04-15
WJA593 - 3 2026-06-23
WJA592 - 3 2026-06-23
WJA384 WestJet 3 2026-06-03
WJA317 WestJet 3 2026-05-18
WJA297 WestJet 3 2026-04-16
WJA268 WestJet 3 2026-06-06
WJA2409 WestJet 3 2026-04-17
WJA224 WestJet 3 2026-06-23
WJA1601 WestJet 3 2026-05-26
WJA1553 - 3 2026-06-22
WJA1502 - 3 2026-07-01
WJA1468 - 3 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 WJA1026 - Jul 14, 02:10 UTCJul 14, 04:00 UTC1h 50m
2026-07-13 WJA1091 LAS → YYC Jul 13, 21:05 UTCJul 13, 23:25 UTC2h 20m
2026-07-13 WJA1088 YYC → LAS Jul 13, 17:15 UTCJul 13, 19:40 UTC2h 25m
2026-07-13 WJA351 - Jul 13, 01:05 UTCJul 13, 02:01 UTC55m
2026-07-12 WJA352 YYC → YXE Jul 12, 23:25 UTCJul 13, 00:10 UTC45m
2026-07-12 WJA114 - Jul 12, 20:35 UTCJul 12, 21:35 UTC1h 0m
2026-07-12 WJA113 YYC → YVR Jul 12, 18:01 UTCJul 12, 19:20 UTC1h 20m
2026-07-12 WJA559 YUL → YYC Jul 12, 11:40 UTCJul 12, 16:05 UTC4h 25m
2026-07-11 WJA2856 - Jul 11, 16:25 UTCJul 12, 04:50 UTC12h 25m
2026-07-10 WJA2903 YUL → YUL Jul 10, 12:05 UTCJul 10, 22:00 UTC9h 55m
2026-07-09 WJA2903 YUL → YUL Jul 9, 12:10 UTCJul 9, 22:15 UTC10h 5m
2026-07-09 WJA566 YYC → YUL Jul 9, 00:05 UTCJul 9, 03:35 UTC3h 30m
2026-07-08 WJA136 YVR → YYC Jul 8, 13:55 UTCJul 8, 14:55 UTC1h 0m
2026-07-08 WJA135 YYC → YVR Jul 8, 03:35 UTCJul 8, 04:40 UTC1h 5m
2026-07-07 WJA1025 - Jul 7, 22:15 UTCJul 8, 00:40 UTC2h 25m
2026-07-07 WJA1022 - Jul 7, 18:10 UTCJul 7, 20:55 UTC2h 45m
2026-07-07 WJA4033 YYC → YYC Jul 7, 00:25 UTCJul 7, 03:30 UTC3h 5m
2026-07-06 WJA643 - Jul 6, 19:05 UTCJul 6, 22:55 UTC3h 50m
2026-07-06 WJA620 YYC → YYZ Jul 6, 13:20 UTCJul 6, 16:45 UTC3h 25m
2026-07-06 WJA1625 BOS → YYC Jul 6, 02:05 UTCJul 6, 06:50 UTC4h 45m
2026-07-05 WJA1624 YYC → BOS Jul 5, 17:10 UTCJul 5, 21:10 UTC4h 0m
2026-07-05 WJA631 YYZ → YYC Jul 5, 11:15 UTCJul 5, 15:05 UTC3h 50m
2026-07-05 WJA660 YYC → YYZ Jul 5, 06:10 UTCJul 5, 09:20 UTC3h 10m
2026-07-04 WJA831 YQB → YYC Jul 4, 23:30 UTCJul 5, 04:05 UTC4h 35m
2026-07-04 WJA830 - Jul 4, 18:35 UTCJul 4, 22:15 UTC3h 40m
2026-07-04 WJA136 YVR → YYC Jul 4, 14:00 UTCJul 4, 15:00 UTC1h 0m
2026-07-04 WJA135 YYC → YVR Jul 4, 03:50 UTCJul 4, 05:05 UTC1h 15m
2026-07-02 WJA1507 - Jul 2, 01:25 UTCJul 2, 03:35 UTC2h 10m
2026-07-01 WJA1502 YYC → SFO Jul 1, 21:45 UTCJul 2, 00:05 UTC2h 20m
2026-07-01 WJA136 YVR → YYC Jul 1, 13:55 UTCJul 1, 15:00 UTC1h 5m
2026-06-30 WJA1057 LAS → YVR Jun 30, 20:40 UTCJun 30, 23:05 UTC2h 25m
2026-06-30 WJA1056 - Jun 30, 16:55 UTCJun 30, 19:10 UTC2h 15m
2026-06-29 WJA2121 - Jun 29, 16:10 UTCJun 30, 01:40 UTC9h 31m
2026-06-28 WJA315 - Jun 28, 20:59 UTCJun 28, 22:04 UTC1h 5m
2026-06-28 WJA315 YEG → YVR Jun 28, 20:54 UTCJun 29, 19:24 UTC22h 31m
2026-06-28 WJA308 - Jun 28, 18:25 UTCJun 28, 19:34 UTC1h 10m
2026-06-28 WJA109 YYC → YVR Jun 28, 15:55 UTCJun 28, 16:55 UTC1h 0m
2026-06-27 WJA181 YYC → YLW Jun 27, 14:26 UTCJun 28, 06:10 UTC15h 44m
2026-06-27 WJA181 - Jun 27, 14:29 UTCJun 27, 15:10 UTC40m
2026-06-27 WJA180 - Jun 27, 12:19 UTCJun 27, 13:04 UTC45m
2026-06-26 WJA9520 - Jun 26, 20:10 UTCJun 26, 20:55 UTC45m
2026-06-24 WJA1163 PHX → YYC Jun 24, 20:20 UTCJun 24, 22:55 UTC2h 35m
2026-06-24 WJA1160 YYC → PHX Jun 24, 16:19 UTCJun 24, 19:00 UTC2h 40m
2026-06-24 WJA221 YYC → YZF Jun 24, 11:09 UTCJun 24, 12:50 UTC1h 40m
2026-06-23 WJA593 - Jun 23, 23:14 UTCJun 24, 02:45 UTC3h 30m
2026-06-23 WJA592 - Jun 23, 18:29 UTCJun 23, 21:24 UTC2h 55m
2026-06-23 WJA224 YEG → YOW Jun 23, 15:30 UTCJun 23, 17:09 UTC1h 40m
2026-06-23 WJA1507 - Jun 23, 01:40 UTCJun 23, 01:59 UTC20m
2026-06-22 WJA1502 YYC → SFO Jun 22, 21:59 UTCJun 23, 00:24 UTC2h 25m
2026-06-22 WJA1502 YYC → SFO Jun 22, 21:57 UTCJun 23, 19:59 UTC22h 3m

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 WJA135, WJA136, WJA1091, WJA1057, WJA538.