sensors Mode-S transponder
C0637C
ICAO 24-bit transponder address · allocated to Canada
Currently assigned to C-GLRN · BOEING 737-800 · operated by Westjet
- Hex
- C0637C
- Octal
- 60061574
- Decimal
- 12,608,380
- Country
- CA
- Tail
- C-GLRN
- Type
- B738
- Flights observed
- 141
- Distinct callsigns
- 20
- Country
- CA
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address C0637C 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 |
|---|---|---|---|
| WJA2603 | WestJet | 6 | 2026-04-23 |
| WJA2609 | WestJet | 5 | 2026-04-23 |
| WJA134 | WestJet | 5 | 2026-05-17 |
| WJA845 | WestJet | 4 | 2026-04-25 |
| WJA844 | WestJet | 4 | 2026-04-25 |
| WJA553 | WestJet | 4 | 2026-05-15 |
| WJA502 | WestJet | 4 | 2026-04-22 |
| WJA397 | WestJet | 4 | 2026-05-25 |
| WJA392 | WestJet | 4 | 2026-05-25 |
| WJA2602 | WestJet | 4 | 2026-04-19 |
| WJA828 | WestJet | 3 | 2026-05-26 |
| WJA592 | WestJet | 3 | 2026-05-20 |
| WJA552 | WestJet | 3 | 2026-05-11 |
| WJA518 | WestJet | 3 | 2026-05-26 |
| WJA515 | WestJet | 3 | 2026-05-26 |
| WJA509 | WestJet | 3 | 2026-04-22 |
| WJA319 | WestJet | 3 | 2026-05-18 |
| WJA2604 | WestJet | 3 | 2026-04-16 |
| WJA230 | WestJet | 3 | 2026-05-25 |
| WJA223 | WestJet | 3 | 2026-05-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | WJA8978 | - | May 28, 13:25 UTC | May 28, 15:50 UTC | 2h 25m |
| 2026-05-27 | WJA652 | YYC → YYZ | May 27, 01:26 UTC | May 27, 04:55 UTC | 3h 29m |
| 2026-05-26 | WJA518 | YQQ → YYC | May 26, 18:05 UTC | May 26, 18:59 UTC | 55m |
| 2026-05-26 | WJA518 | YQQ → YYC | May 26, 18:04 UTC | May 27, 04:55 UTC | 10h 51m |
| 2026-05-26 | WJA515 | YYC → YQQ | May 26, 15:36 UTC | May 27, 04:55 UTC | 13h 19m |
| 2026-05-26 | WJA515 | YYC → YQQ | May 26, 15:39 UTC | May 26, 16:55 UTC | 1h 15m |
| 2026-05-26 | WJA223 | YWG → YYC | May 26, 12:10 UTC | May 26, 13:50 UTC | 1h 40m |
| 2026-05-26 | WJA828 | YLW → YWG | May 26, 03:00 UTC | May 26, 05:05 UTC | 2h 5m |
| 2026-05-25 | WJA829 | YWG → YLW | May 25, 23:19 UTC | May 26, 01:40 UTC | 2h 20m |
| 2026-05-25 | WJA230 | YYC → YHZ | May 25, 20:40 UTC | May 25, 22:19 UTC | 1h 40m |
| 2026-05-25 | WJA397 | YQR → YYC | May 25, 17:50 UTC | May 25, 18:50 UTC | 1h 0m |
| 2026-05-25 | WJA392 | YEG → YHZ | May 25, 15:30 UTC | May 25, 16:20 UTC | 50m |
| 2026-05-25 | WJA393 | YQR → YYC | May 25, 12:05 UTC | May 25, 13:10 UTC | 1h 5m |
| 2026-05-25 | WJA861 | YHZ → YQR | May 25, 02:40 UTC | May 25, 03:45 UTC | 1h 5m |
| 2026-05-24 | WJA860 | YQR → YHZ | May 24, 18:50 UTC | May 24, 21:51 UTC | 3h 1m |
| 2026-05-24 | WJA271 | YWG → YYC | May 24, 01:06 UTC | May 24, 23:46 UTC | 22h 40m |
| 2026-05-23 | WJA828 | YLW → YWG | May 23, 03:20 UTC | May 23, 05:25 UTC | 2h 5m |
| 2026-05-23 | WJA828 | YLW → YWG | May 23, 03:19 UTC | May 24, 02:25 UTC | 23h 7m |
| 2026-05-22 | WJA829 | YWG → YLW | May 22, 23:45 UTC | May 23, 02:00 UTC | 2h 15m |
| 2026-05-22 | WJA230 | YYC → YHZ | May 22, 20:30 UTC | May 22, 22:15 UTC | 1h 45m |
| 2026-05-22 | WJA110 | YVR → YYC | May 22, 17:55 UTC | May 22, 19:00 UTC | 1h 5m |
| 2026-05-22 | WJA107 | YYC → YVR | May 22, 14:40 UTC | May 22, 15:45 UTC | 1h 5m |
| 2026-05-21 | WJA1553 | SEA → YYC | May 21, 17:45 UTC | May 22, 15:55 UTC | 22h 11m |
| 2026-05-21 | WJA221 | YYC → YZF | May 21, 11:15 UTC | May 22, 03:50 UTC | 16h 36m |
| 2026-05-20 | WJA592 | YYZ → YUL | May 20, 18:10 UTC | May 20, 19:00 UTC | 50m |
| 2026-05-20 | WJA592 | YYZ → YUL | May 20, 18:10 UTC | May 21, 16:05 UTC | 21h 56m |
| 2026-05-20 | WJA224 | YEG → YOW | May 20, 15:20 UTC | May 20, 17:00 UTC | 1h 40m |
| 2026-05-19 | WJA476 | YWG → YYZ | May 19, 23:05 UTC | May 20, 00:10 UTC | 1h 5m |
| 2026-05-19 | WJA475 | YYC → YXX | May 19, 20:40 UTC | May 19, 21:50 UTC | 1h 10m |
| 2026-05-19 | WJA1553 | SEA → YYC | May 19, 17:55 UTC | May 19, 19:00 UTC | 1h 5m |
| 2026-05-18 | WJA593 | YHZ → YWG | May 18, 22:38 UTC | May 19, 21:00 UTC | 22h 22m |
| 2026-05-18 | WJA592 | YYZ → YUL | May 18, 18:12 UTC | May 19, 16:15 UTC | 22h 3m |
| 2026-05-18 | WJA224 | YEG → YOW | May 18, 15:26 UTC | May 19, 15:00 UTC | 23h 34m |
| 2026-05-18 | WJA319 | YOW → YEG | May 18, 00:33 UTC | May 18, 23:00 UTC | 22h 27m |
| 2026-05-17 | WJA117 | YYC → YVR | May 17, 19:24 UTC | May 18, 19:00 UTC | 23h 36m |
| 2026-05-17 | WJA105 | YYC → YVR | May 17, 13:12 UTC | May 18, 07:00 UTC | 17h 49m |
| 2026-05-17 | WJA134 | YVR → YYC | May 17, 05:39 UTC | May 18, 01:50 UTC | 20h 12m |
| 2026-05-16 | WJA105 | YYC → YVR | May 16, 13:26 UTC | May 17, 13:01 UTC | 23h 35m |
| 2026-05-15 | WJA553 | YYC → YCD | May 15, 17:30 UTC | May 15, 18:45 UTC | 1h 15m |
| 2026-05-15 | WJA553 | YYC → YCD | May 15, 17:27 UTC | May 16, 14:41 UTC | 21h 14m |
| 2026-05-14 | WJA2201 | CUN → YYC | May 14, 21:20 UTC | May 15, 03:15 UTC | 5h 55m |
| 2026-05-14 | WJA2200 | YYC → MEX | May 14, 14:40 UTC | May 14, 19:45 UTC | 5h 5m |
| 2026-05-12 | WJA2203 | PVR → YEG | May 12, 16:05 UTC | May 13, 04:05 UTC | 12h 0m |
| 2026-05-11 | WJA552 | YVR → YLW | May 11, 20:00 UTC | May 11, 21:00 UTC | 1h 0m |
| 2026-05-11 | WJA552 | YVR → YLW | May 11, 19:56 UTC | May 12, 19:00 UTC | 23h 5m |
| 2026-05-11 | WJA553 | YYC → YCD | May 11, 17:25 UTC | May 11, 18:45 UTC | 1h 20m |
| 2026-05-10 | WJA352 | YYC → YXE | May 10, 22:55 UTC | May 10, 23:00 UTC | 5m |
| 2026-05-10 | WJA352 | YYC → YXE | May 10, 22:54 UTC | May 11, 21:00 UTC | 22h 7m |
| 2026-05-10 | WJA552 | YVR → YLW | May 10, 20:05 UTC | May 10, 21:04 UTC | 1h 0m |
| 2026-05-10 | WJA553 | YYC → YCD | May 10, 17:25 UTC | May 10, 18:45 UTC | 1h 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-GLRN page for operator, model, and routing details .