sensors Mode-S transponder
C021F6
ICAO 24-bit transponder address · allocated to Canada
Currently assigned to C-FMWJ · BOEING 737-700 · operated by Westjet
- Hex
- C021F6
- Octal
- 60020766
- Decimal
- 12,591,606
- Country
- CA
- Tail
- C-FMWJ
- Type
- B737
- Flights observed
- 18
- Distinct callsigns
- 15
- Country
- CA
- Last broadcast
- 32m ago
Current position
Country allocation
The ICAO 24-bit address C021F6 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| WJA685 | WestJet | 2 | 2026-04-25 |
| WJA312 | WestJet | 2 | 2026-04-28 |
| WJA1088 | WestJet | 2 | 2026-04-23 |
| WJA8991 | WestJet | 1 | 2026-04-22 |
| WJA496 | WestJet | 1 | 2026-04-27 |
| WJA491 | WestJet | 1 | 2026-04-27 |
| WJA359 | WestJet | 1 | 2026-04-23 |
| WJA309 | WestJet | 1 | 2026-04-28 |
| WJA237 | WestJet | 1 | 2026-04-24 |
| WJA208 | WestJet | 1 | 2026-04-26 |
| WJA166 | WestJet | 1 | 2026-04-24 |
| WJA1531 | WestJet | 1 | 2026-04-26 |
| WJA151 | WestJet | 1 | 2026-04-27 |
| WJA144 | WestJet | 1 | 2026-04-28 |
| WJA1089 | WestJet | 1 | 2026-04-23 |
Recent flights last 18
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-04-28 | WJA312 | YLW → YEG | Apr 28, 22:25 UTC | Apr 28, 23:40 UTC | 1h 15m |
| 2026-04-28 | WJA312 | YLW → YEG | Apr 28, 22:24 UTC | Apr 29, 21:30 UTC | 23h 7m |
| 2026-04-28 | WJA309 | YYC → YQQ | Apr 28, 19:25 UTC | Apr 28, 20:45 UTC | 1h 20m |
| 2026-04-28 | WJA144 | YYC → YEG | Apr 28, 15:50 UTC | Apr 28, 16:20 UTC | 30m |
| 2026-04-27 | WJA151 | YEG → YYC | Apr 27, 22:35 UTC | Apr 27, 23:05 UTC | 30m |
| 2026-04-27 | WJA491 | YYC → YQQ | Apr 27, 03:30 UTC | Apr 27, 05:15 UTC | 1h 45m |
| 2026-04-27 | WJA496 | YEG → YWG | Apr 27, 00:45 UTC | Apr 27, 02:25 UTC | 1h 40m |
| 2026-04-26 | WJA1531 | MSP → YEG | Apr 26, 20:05 UTC | Apr 26, 22:25 UTC | 2h 20m |
| 2026-04-26 | WJA208 | YLW → YYC | Apr 26, 02:50 UTC | Apr 27, 01:30 UTC | 22h 41m |
| 2026-04-25 | WJA685 | YYC → YZF | Apr 25, 17:49 UTC | Apr 26, 17:30 UTC | 23h 42m |
| 2026-04-25 | WJA685 | YYC → YZF | Apr 25, 17:50 UTC | Apr 25, 18:30 UTC | 40m |
| 2026-04-24 | WJA237 | YYC → YEG | Apr 24, 18:29 UTC | Apr 25, 17:30 UTC | 23h 1m |
| 2026-04-24 | WJA166 | YVR → YEG | Apr 24, 00:54 UTC | Apr 24, 23:25 UTC | 22h 31m |
| 2026-04-23 | WJA359 | YXE → YYC | Apr 23, 22:13 UTC | Apr 24, 21:30 UTC | 23h 17m |
| 2026-04-23 | WJA1089 | LAS → YYC | Apr 23, 15:05 UTC | Apr 24, 03:20 UTC | 12h 15m |
| 2026-04-23 | WJA1088 | YYC → LAS | Apr 23, 01:50 UTC | Apr 23, 04:20 UTC | 2h 30m |
| 2026-04-23 | WJA1088 | YYC → LAS | Apr 23, 01:47 UTC | Apr 24, 01:25 UTC | 23h 38m |
| 2026-04-22 | WJA8991 | BFI → YYC | Apr 22, 16:55 UTC | Apr 22, 17:45 UTC | 50m |
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-FMWJ page for operator, model, and routing details .