Apparatus

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sensors Mode-S transponder

C0737C

ICAO 24-bit transponder address · allocated to Canada

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

Hex
C0737C
Octal
60071574
Decimal
12,612,476
Country
CA
Tail
C-GRTB
Type
B738
Broadcasting now · callsign WJA681 · 9,425 ft
Flights observed
236
Distinct callsigns
20
Country
CA
Last broadcast
3h ago

Current position

C0737C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C0737C 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
WJA436 WestJet 5 2026-04-16
WJA1430 WestJet 5 2026-06-25
WJA633 - 4 2026-07-10
WJA384 - 4 2026-06-21
WJA136 WestJet 4 2026-06-29
WJA129 - 4 2026-06-20
WJA1156 WestJet 4 2026-04-18
WJA1037 - 4 2026-06-26
WJA817 WestJet 3 2026-06-05
WJA637 WestJet 3 2026-06-11
WJA632 WestJet 3 2026-06-05
WJA553 WestJet 3 2026-05-20
WJA467 WestJet 3 2026-04-16
WJA271 WestJet 3 2026-05-15
WJA2583 WestJet 3 2026-04-17
WJA2197 WestJet 3 2026-04-15
WJA2196 - 3 2026-04-14
WJA1431 - 3 2026-06-26
WJA1410 - 3 2026-06-26
WJA127 - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 WJA680 - Jul 14, 16:00 UTCJul 14, 17:30 UTC1h 30m
2026-07-14 WJA179 YYC → YVR Jul 14, 00:40 UTCJul 14, 01:55 UTC1h 15m
2026-07-13 WJA178 YVR → YYC Jul 13, 22:00 UTCJul 13, 23:00 UTC1h 0m
2026-07-13 WJA1583 - Jul 13, 16:05 UTCJul 13, 20:25 UTC4h 20m
2026-07-13 WJA1582 - Jul 13, 00:40 UTCJul 13, 04:20 UTC3h 40m
2026-07-12 WJA315 - Jul 12, 21:10 UTCJul 12, 22:35 UTC1h 25m
2026-07-12 WJA308 - Jul 12, 18:25 UTCJul 12, 19:20 UTC55m
2026-07-12 WJA109 YYC → YVR Jul 12, 16:01 UTCJul 12, 17:15 UTC1h 15m
2026-07-12 WJA655 - Jul 12, 00:25 UTCJul 12, 04:15 UTC3h 50m
2026-07-11 WJA2032 YYZ → YYZ Jul 11, 13:40 UTCJul 11, 22:45 UTC9h 5m
2026-07-10 WJA642 YYC → YYZ Jul 10, 19:15 UTCJul 10, 22:25 UTC3h 11m
2026-07-10 WJA633 YYZ → YYC Jul 10, 13:20 UTCJul 10, 17:10 UTC3h 50m
2026-07-09 WJA454 YEG → YYZ Jul 9, 21:59 UTCJul 10, 21:00 UTC23h 2m
2026-07-09 WJA449 YYZ → YEG Jul 9, 16:40 UTCJul 9, 20:25 UTC3h 45m
2026-07-09 WJA449 YYZ → YEG Jul 9, 16:36 UTCJul 10, 15:00 UTC22h 24m
2026-07-09 WJA754 - Jul 9, 12:45 UTCJul 9, 15:05 UTC2h 20m
2026-07-09 WJA755 - Jul 9, 03:55 UTCJul 9, 06:45 UTC2h 50m
2026-07-08 WJA650 YYC → YYZ Jul 8, 00:30 UTCJul 8, 03:35 UTC3h 5m
2026-07-07 WJA1811 MSP → YYC Jul 7, 20:05 UTCJul 7, 22:40 UTC2h 35m
2026-07-07 WJA1810 YYC → MSP Jul 7, 16:35 UTCJul 7, 18:50 UTC2h 15m
2026-07-06 WJA155 - Jul 6, 01:45 UTCJul 6, 02:15 UTC30m
2026-07-06 WJA156 YYC → YEG Jul 6, 00:05 UTCJul 6, 00:35 UTC30m
2026-07-04 WJA2201 CUN → YYC Jul 4, 21:10 UTCJul 5, 02:40 UTC5h 30m
2026-07-04 WJA2200 YYC → CUN Jul 4, 14:40 UTCJul 4, 19:45 UTC5h 5m
2026-07-03 WJA186 - Jul 3, 19:45 UTCJul 3, 20:30 UTC45m
2026-07-03 WJA183 - Jul 3, 15:35 UTCJul 3, 16:20 UTC45m
2026-07-03 WJA100 YVR → YYC Jul 3, 12:10 UTCJul 3, 13:15 UTC1h 5m
2026-07-02 WJA111 YYC → YVR Jul 2, 16:20 UTCJul 2, 17:30 UTC1h 10m
2026-07-02 WJA111 YYC → YVR Jul 2, 16:19 UTCJul 3, 13:20 UTC21h 1m
2026-07-02 WJA747 - Jul 2, 10:20 UTCJul 2, 14:15 UTC3h 55m
2026-07-02 WJA748 - Jul 2, 05:50 UTCJul 2, 09:10 UTC3h 20m
2026-07-01 WJA1681 JFK → YYC Jul 1, 22:10 UTCJul 2, 02:50 UTC4h 40m
2026-07-01 WJA1680 YYC → JFK Jul 1, 16:10 UTCJul 1, 20:25 UTC4h 15m
2026-06-30 WJA121 YYC → YVR Jun 30, 21:25 UTCJul 1, 20:25 UTC23h 0m
2026-06-30 WJA112 YVR → YYC Jun 30, 18:50 UTCJun 30, 20:05 UTC1h 15m
2026-06-30 WJA112 YVR → YYC Jun 30, 18:48 UTCJul 1, 17:00 UTC22h 13m
2026-06-30 WJA111 YYC → YVR Jun 30, 16:15 UTCJun 30, 17:25 UTC1h 10m
2026-06-29 WJA749 - Jun 29, 22:05 UTCJun 30, 01:55 UTC3h 51m
2026-06-29 WJA746 - Jun 29, 17:24 UTCJun 29, 20:35 UTC3h 10m
2026-06-29 WJA136 YVR → YYC Jun 29, 13:49 UTCJun 29, 15:00 UTC1h 10m
2026-06-29 WJA321 - Jun 29, 03:44 UTCJun 29, 04:55 UTC1h 10m
2026-06-28 WJA463 - Jun 28, 21:55 UTCJun 29, 01:34 UTC3h 40m
2026-06-28 WJA2775 PUJ → YYZ Jun 28, 16:00 UTCJun 28, 19:25 UTC3h 25m
2026-06-28 WJA2774 YYZ → CUN Jun 28, 10:50 UTCJun 28, 14:19 UTC3h 30m
2026-06-27 WJA2000 YYZ → YYZ Jun 27, 18:29 UTCJun 28, 04:59 UTC10h 30m
2026-06-27 WJA893 - Jun 27, 11:04 UTCJun 27, 11:50 UTC45m
2026-06-27 WJA892 - Jun 27, 03:40 UTCJun 27, 04:19 UTC40m
2026-06-26 WJA1037 - Jun 26, 21:15 UTCJun 26, 23:39 UTC2h 25m
2026-06-26 WJA1410 YYC → MCO Jun 26, 15:20 UTCJun 26, 19:50 UTC4h 30m
2026-06-26 WJA1431 - Jun 26, 00:05 UTCJun 26, 04:00 UTC3h 55m

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

Mode-S C0737C frequently asked

What is Mode-S code C0737C?
C0737C is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GRTB.
Where is Mode-S C0737C registered?
Mode-S code C0737C is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C0737C broadcasting right now?
Yes. Mode-S C0737C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C0737C, octal 60071574, decimal 12,612,476.
What flights does C0737C operate?
Mode-S C0737C has broadcast 20 distinct callsigns, including WJA436, WJA1430, WJA633, WJA384, WJA136.