sensors Mode-S transponder

C071A4

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GRAX · BOEING 737 MAX 8 · operated by Westjet

Hex
C071A4
Octal
60070644
Decimal
12,612,004
Country
CA
Tail
C-GRAX
Type
B38M
No current signal · last broadcast 54m ago
Flights observed
140
Distinct callsigns
20
Country
CA
Last broadcast
54m ago

Last known position

Most recent position reported by Mode-S C071A4.

Country allocation

The ICAO 24-bit address C071A4 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
WJA817 WestJet 4 2026-05-23
WJA46 WestJet 4 2026-05-27
WJA629 WestJet 3 2026-04-14
WJA518 WestJet 3 2026-04-30
WJA455 WestJet 3 2026-05-20
WJA387 WestJet 3 2026-05-24
WJA386 WestJet 3 2026-05-25
WJA2587 WestJet 3 2026-04-25
WJA1891 WestJet 3 2026-04-16
WJA1890 WestJet 3 2026-04-16
WJA0816 WestJet 3 2026-04-13
WJA93 WestJet 2 2026-05-23
WJA830 WestJet 2 2026-05-21
WJA806 WestJet 2 2026-05-27
WJA73 WestJet 2 2026-05-29
WJA476 WestJet 2 2026-04-14
WJA475 WestJet 2 2026-04-14
WJA47 WestJet 2 2026-05-27
WJA460 WestJet 2 2026-04-28
WJA375 WestJet 2 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 WJA73 EDI → YHZ May 29, 09:05 UTCMay 29, 10:15 UTC1h 10m
2026-05-29 WJA73 EDI → YHZ May 29, 09:04 UTCMay 30, 04:35 UTC19h 32m
2026-05-29 WJA72 YHZ → EDI May 29, 02:05 UTCMay 29, 07:15 UTC5h 10m
2026-05-28 WJA67 BCN → YHZ May 28, 10:20 UTCMay 28, 17:10 UTC6h 50m
2026-05-27 WJA806 YYZ → YHZ May 27, 22:54 UTCMay 28, 17:10 UTC18h 16m
2026-05-27 WJA806 YYZ → YHZ May 27, 22:55 UTCMay 27, 23:00 UTC5m
2026-05-27 WJA47 DUB → YYZ May 27, 10:05 UTCMay 27, 17:00 UTC6h 55m
2026-05-27 WJA46 YHZ → EDI May 27, 02:09 UTCMay 27, 08:15 UTC6h 5m
2026-05-25 WJA386 YVR → YHZ May 25, 23:14 UTCMay 26, 11:44 UTC12h 31m
2026-05-25 WJA438 YEG → YYZ May 25, 13:08 UTCMay 26, 11:44 UTC22h 37m
2026-05-24 WJA380 YXX → YYC May 24, 17:34 UTCMay 25, 16:30 UTC22h 57m
2026-05-24 WJA387 YHZ → YEG May 24, 04:10 UTCMay 25, 03:00 UTC22h 50m
2026-05-23 WJA817 YUL → YYZ May 23, 23:35 UTCMay 24, 23:00 UTC23h 26m
2026-05-23 WJA93 CWL → YYZ May 23, 11:05 UTCMay 24, 06:25 UTC19h 21m
2026-05-23 WJA93 CWL → YYZ May 23, 11:10 UTCMay 23, 18:35 UTC7h 26m
2026-05-22 WJA1110 YYZ → FLL May 22, 17:48 UTCMay 23, 16:55 UTC23h 7m
2026-05-22 WJA660 YYC → YYZ May 22, 05:56 UTCMay 23, 04:20 UTC22h 24m
2026-05-21 WJA830 YYC → YQB May 21, 18:40 UTCMay 21, 22:20 UTC3h 40m
2026-05-21 WJA830 YYC → YQB May 21, 18:37 UTCMay 22, 09:20 UTC14h 44m
2026-05-21 WJA633 YYZ → YYC May 21, 13:20 UTCMay 21, 17:10 UTC3h 50m
2026-05-20 WJA455 YYC → YXX May 20, 18:36 UTCMay 21, 17:00 UTC22h 25m
2026-05-20 WJA570 YEG → YWG May 20, 12:13 UTCMay 21, 03:40 UTC15h 28m
2026-05-20 WJA571 YWG → YEG May 20, 03:05 UTCMay 21, 03:00 UTC23h 56m
2026-05-19 WJA1153 SJU → YYZ May 19, 20:05 UTCMay 19, 23:50 UTC3h 45m
2026-05-19 WJA1153 SJU → YYZ May 19, 20:03 UTCMay 20, 19:00 UTC22h 58m
2026-05-18 WJA386 YVR → YHZ May 18, 23:15 UTCMay 19, 01:25 UTC2h 10m
2026-05-18 WJA386 YVR → YHZ May 18, 23:15 UTCMay 19, 23:00 UTC23h 45m
2026-05-18 WJA385 YHZ → YVR May 18, 19:40 UTCMay 18, 22:00 UTC2h 20m
2026-05-18 WJA37 DUB → YYZ May 18, 10:55 UTCMay 18, 17:50 UTC6h 55m
2026-05-18 WJA36 YYZ → DUB May 18, 02:45 UTCMay 18, 09:10 UTC6h 25m
2026-05-17 WJA2500 YYZ → LIR May 17, 13:09 UTCMay 18, 11:35 UTC22h 27m
2026-05-17 WJA2500 YYZ → LIR May 17, 13:10 UTCMay 17, 16:01 UTC2h 50m
2026-05-16 WJA35 DUB → YYZ May 16, 11:25 UTCMay 16, 18:35 UTC7h 10m
2026-05-16 WJA34 YYZ → DUB May 16, 03:25 UTCMay 16, 09:45 UTC6h 21m
2026-05-15 WJA2101 PUJ → YYZ May 15, 13:50 UTCMay 15, 23:35 UTC9h 44m
2026-05-14 WJA2785 SJD → YYZ May 14, 20:46 UTCMay 15, 15:00 UTC18h 14m
2026-05-14 WJA2784 YYZ → SJD May 14, 14:33 UTCMay 15, 11:45 UTC21h 13m
2026-05-14 WJA2784 YYZ → SJD May 14, 14:35 UTCMay 14, 17:50 UTC3h 15m
2026-05-13 WJA2561 KIN → YYZ May 13, 15:25 UTCMay 14, 01:35 UTC10h 10m
2026-05-12 WJA1410 YYC → MCO May 12, 15:10 UTCMay 12, 20:01 UTC4h 50m
2026-05-12 WJA1410 YYC → MCO May 12, 15:10 UTCMay 12, 23:55 UTC8h 46m
2026-05-11 WJA1162 YYC → PHX May 11, 21:05 UTCMay 12, 03:35 UTC6h 30m
2026-05-09 WJA2200 YYC → MEX May 9, 14:45 UTCMay 10, 02:50 UTC12h 5m
2026-05-08 WJA1553 SEA → YYC May 8, 17:44 UTCMay 9, 17:00 UTC23h 16m
2026-05-08 WJA387 YHZ → YEG May 8, 03:44 UTCMay 8, 05:54 UTC2h 10m
2026-05-08 WJA387 YHZ → YEG May 8, 03:43 UTCMay 8, 22:30 UTC18h 47m
2026-05-07 WJA811 YHZ → YYZ May 7, 23:39 UTCMay 8, 01:40 UTC2h 0m
2026-05-07 WJA33 FCO → YYC May 7, 05:25 UTCMay 7, 11:25 UTC6h 0m
2026-05-06 WJA32 YYC → FCO May 6, 15:05 UTCMay 6, 20:20 UTC5h 15m
2026-05-06 WJA32 YYC → FCO May 6, 15:01 UTCMay 7, 11:25 UTC20h 25m

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

Mode-S C071A4 frequently asked

What is Mode-S code C071A4?
C071A4 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GRAX.
Where is Mode-S C071A4 registered?
Mode-S code C071A4 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C071A4 broadcasting right now?
No active broadcast right now. Last signal was 54m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C071A4, octal 60070644, decimal 12,612,004.
What flights does C071A4 operate?
Mode-S C071A4 has broadcast 20 distinct callsigns, including WJA817, WJA46, WJA629, WJA518, WJA455.