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
- Flights observed
- 120
- Distinct callsigns
- 20
- Country
- CA
- Last broadcast
- 4h ago
Last known 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 |
| WJA1156 | WestJet | 4 | 2026-04-18 |
| 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 |
| WJA1430 | WestJet | 3 | 2026-05-05 |
| WJA129 | WestJet | 3 | 2026-05-12 |
| WJA1101 | WestJet | 3 | 2026-04-13 |
| WJA817 | WestJet | 2 | 2026-05-20 |
| WJA641 | WestJet | 2 | 2026-04-28 |
| WJA637 | WestJet | 2 | 2026-05-21 |
| WJA630 | WestJet | 2 | 2026-05-27 |
| WJA447 | - | 2 | 2026-04-13 |
| WJA282 | WestJet | 2 | 2026-04-29 |
| WJA2735 | - | 2 | 2026-04-17 |
| WJA2728 | - | 2 | 2026-04-17 |
| WJA2582 | - | 2 | 2026-04-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | WJA1582 | YVR → DTW | May 29, 20:55 UTC | May 30, 01:05 UTC | 4h 10m |
| 2026-05-29 | WJA539 | YWG → YYC | May 29, 11:15 UTC | May 29, 13:40 UTC | 2h 25m |
| 2026-05-28 | WJA544 | - | May 28, 22:25 UTC | May 29, 00:55 UTC | 2h 30m |
| 2026-05-28 | WJA109 | YYC → YVR | May 28, 15:55 UTC | May 28, 17:00 UTC | 1h 5m |
| 2026-05-28 | WJA401 | YYC → YYJ | May 28, 13:10 UTC | May 28, 14:10 UTC | 1h 0m |
| 2026-05-27 | WJA630 | YYC → YYG | May 27, 14:35 UTC | May 28, 06:50 UTC | 16h 15m |
| 2026-05-27 | WJA630 | YYC → YYG | May 27, 14:35 UTC | May 27, 18:00 UTC | 3h 25m |
| 2026-05-26 | WJA1541 | IAH → YYC | May 26, 11:44 UTC | May 26, 15:24 UTC | 3h 40m |
| 2026-05-25 | WJA1542 | YYC → IAH | May 25, 23:35 UTC | May 26, 03:30 UTC | 3h 55m |
| 2026-05-25 | WJA204 | YYC → YWG | May 25, 03:23 UTC | May 26, 03:00 UTC | 23h 37m |
| 2026-05-25 | WJA191 | YYC → YXX | May 25, 01:33 UTC | May 26, 01:00 UTC | 23h 27m |
| 2026-05-24 | WJA119 | YYC → YVR | May 24, 20:20 UTC | May 24, 21:35 UTC | 1h 15m |
| 2026-05-24 | WJA119 | YYC → YVR | May 24, 20:18 UTC | May 25, 19:00 UTC | 22h 43m |
| 2026-05-23 | WJA1543 | IAH → YYC | May 23, 20:05 UTC | May 24, 00:00 UTC | 3h 55m |
| 2026-05-23 | WJA1540 | YYC → IAH | May 23, 15:05 UTC | May 23, 18:35 UTC | 3h 31m |
| 2026-05-22 | WJA2201 | CUN → YYC | May 22, 21:10 UTC | May 23, 02:25 UTC | 5h 15m |
| 2026-05-22 | WJA2200 | YYC → MEX | May 22, 14:40 UTC | May 22, 19:50 UTC | 5h 10m |
| 2026-05-21 | WJA637 | YYZ → YYC | May 21, 15:05 UTC | May 22, 15:00 UTC | 23h 55m |
| 2026-05-21 | WJA637 | YYZ → YYC | May 21, 15:10 UTC | May 21, 17:00 UTC | 1h 50m |
| 2026-05-21 | WJA650 | YYC → YYZ | May 21, 00:35 UTC | May 21, 03:55 UTC | 3h 20m |
| 2026-05-20 | WJA552 | YVR → YLW | May 20, 22:00 UTC | May 20, 23:10 UTC | 1h 10m |
| 2026-05-20 | WJA553 | YYC → YCD | May 20, 20:30 UTC | May 20, 20:40 UTC | 10m |
| 2026-05-20 | WJA817 | YUL → YYZ | May 20, 00:55 UTC | May 20, 01:50 UTC | 55m |
| 2026-05-20 | WJA817 | YUL → YYZ | May 20, 00:53 UTC | May 20, 23:00 UTC | 22h 8m |
| 2026-05-19 | WJA816 | YYZ → YUL | May 19, 21:10 UTC | May 19, 22:00 UTC | 50m |
| 2026-05-19 | WJA632 | YYC → YYZ | May 19, 15:55 UTC | May 19, 19:20 UTC | 3h 25m |
| 2026-05-19 | WJA4032 | YYC → YFI | May 19, 00:15 UTC | May 19, 03:30 UTC | 3h 15m |
| 2026-05-18 | WJA116 | YVR → YYC | May 18, 21:15 UTC | May 18, 22:20 UTC | 1h 5m |
| 2026-05-18 | WJA115 | YYC → YVR | May 18, 18:35 UTC | May 18, 19:45 UTC | 1h 10m |
| 2026-05-18 | WJA633 | YYZ → YYC | May 18, 13:20 UTC | May 18, 17:05 UTC | 3h 45m |
| 2026-05-15 | WJA109 | YYC → YVR | May 15, 16:09 UTC | May 16, 11:05 UTC | 18h 57m |
| 2026-05-15 | WJA271 | YWG → YYC | May 15, 01:15 UTC | May 15, 02:25 UTC | 1h 10m |
| 2026-05-15 | WJA271 | YWG → YYC | May 15, 01:13 UTC | May 15, 21:00 UTC | 19h 47m |
| 2026-05-14 | WJA1091 | LAS → YYC | May 14, 21:05 UTC | May 14, 23:35 UTC | 2h 30m |
| 2026-05-14 | WJA1088 | YYC → LAS | May 14, 17:05 UTC | May 14, 19:30 UTC | 2h 25m |
| 2026-05-14 | WJA136 | YVR → YYC | May 14, 13:55 UTC | May 14, 15:01 UTC | 1h 5m |
| 2026-05-13 | WJA2151 | PVR → YVR | May 13, 16:35 UTC | May 14, 03:25 UTC | 10h 50m |
| 2026-05-13 | WJA126 | YVR → YYC | May 13, 02:50 UTC | May 13, 03:50 UTC | 1h 0m |
| 2026-05-13 | WJA126 | YVR → YYC | May 13, 02:47 UTC | May 14, 01:00 UTC | 22h 14m |
| 2026-05-12 | WJA129 | YYC → YVR | May 12, 02:45 UTC | May 12, 03:00 UTC | 15m |
| 2026-05-12 | WJA129 | YYC → YVR | May 12, 02:25 UTC | May 12, 03:35 UTC | 1h 11m |
| 2026-05-11 | WJA1103 | LAX → YYZ | May 11, 19:15 UTC | May 11, 21:35 UTC | 2h 20m |
| 2026-05-11 | WJA1102 | YYZ → LAX | May 11, 15:30 UTC | May 11, 18:00 UTC | 2h 31m |
| 2026-05-11 | WJA129 | YYC → YVR | May 11, 02:20 UTC | May 11, 03:30 UTC | 1h 10m |
| 2026-05-10 | WJA122 | YVR → YYC | May 10, 23:44 UTC | May 11, 00:45 UTC | 1h 0m |
| 2026-05-10 | WJA1103 | LAX → YYZ | May 10, 19:35 UTC | May 10, 21:54 UTC | 2h 20m |
| 2026-05-10 | WJA1102 | YYZ → LAX | May 10, 15:35 UTC | May 10, 18:09 UTC | 2h 35m |
| 2026-05-09 | WJA2121 | SJD → YVR | May 9, 16:05 UTC | May 10, 02:20 UTC | 10h 15m |
| 2026-05-08 | WJA1723 | PSP → YVR | May 8, 20:15 UTC | May 8, 22:55 UTC | 2h 40m |
| 2026-05-08 | WJA1722 | YVR → PSP | May 8, 16:30 UTC | May 8, 18:50 UTC | 2h 20m |
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 .