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
- Flights observed
- 140
- Distinct callsigns
- 20
- Country
- CA
- Last broadcast
- 54m ago
Last known position
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
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | WJA73 | EDI → YHZ | May 29, 09:05 UTC | May 29, 10:15 UTC | 1h 10m |
| 2026-05-29 | WJA73 | EDI → YHZ | May 29, 09:04 UTC | May 30, 04:35 UTC | 19h 32m |
| 2026-05-29 | WJA72 | YHZ → EDI | May 29, 02:05 UTC | May 29, 07:15 UTC | 5h 10m |
| 2026-05-28 | WJA67 | BCN → YHZ | May 28, 10:20 UTC | May 28, 17:10 UTC | 6h 50m |
| 2026-05-27 | WJA806 | YYZ → YHZ | May 27, 22:54 UTC | May 28, 17:10 UTC | 18h 16m |
| 2026-05-27 | WJA806 | YYZ → YHZ | May 27, 22:55 UTC | May 27, 23:00 UTC | 5m |
| 2026-05-27 | WJA47 | DUB → YYZ | May 27, 10:05 UTC | May 27, 17:00 UTC | 6h 55m |
| 2026-05-27 | WJA46 | YHZ → EDI | May 27, 02:09 UTC | May 27, 08:15 UTC | 6h 5m |
| 2026-05-25 | WJA386 | YVR → YHZ | May 25, 23:14 UTC | May 26, 11:44 UTC | 12h 31m |
| 2026-05-25 | WJA438 | YEG → YYZ | May 25, 13:08 UTC | May 26, 11:44 UTC | 22h 37m |
| 2026-05-24 | WJA380 | YXX → YYC | May 24, 17:34 UTC | May 25, 16:30 UTC | 22h 57m |
| 2026-05-24 | WJA387 | YHZ → YEG | May 24, 04:10 UTC | May 25, 03:00 UTC | 22h 50m |
| 2026-05-23 | WJA817 | YUL → YYZ | May 23, 23:35 UTC | May 24, 23:00 UTC | 23h 26m |
| 2026-05-23 | WJA93 | CWL → YYZ | May 23, 11:05 UTC | May 24, 06:25 UTC | 19h 21m |
| 2026-05-23 | WJA93 | CWL → YYZ | May 23, 11:10 UTC | May 23, 18:35 UTC | 7h 26m |
| 2026-05-22 | WJA1110 | YYZ → FLL | May 22, 17:48 UTC | May 23, 16:55 UTC | 23h 7m |
| 2026-05-22 | WJA660 | YYC → YYZ | May 22, 05:56 UTC | May 23, 04:20 UTC | 22h 24m |
| 2026-05-21 | WJA830 | YYC → YQB | May 21, 18:40 UTC | May 21, 22:20 UTC | 3h 40m |
| 2026-05-21 | WJA830 | YYC → YQB | May 21, 18:37 UTC | May 22, 09:20 UTC | 14h 44m |
| 2026-05-21 | WJA633 | YYZ → YYC | May 21, 13:20 UTC | May 21, 17:10 UTC | 3h 50m |
| 2026-05-20 | WJA455 | YYC → YXX | May 20, 18:36 UTC | May 21, 17:00 UTC | 22h 25m |
| 2026-05-20 | WJA570 | YEG → YWG | May 20, 12:13 UTC | May 21, 03:40 UTC | 15h 28m |
| 2026-05-20 | WJA571 | YWG → YEG | May 20, 03:05 UTC | May 21, 03:00 UTC | 23h 56m |
| 2026-05-19 | WJA1153 | SJU → YYZ | May 19, 20:05 UTC | May 19, 23:50 UTC | 3h 45m |
| 2026-05-19 | WJA1153 | SJU → YYZ | May 19, 20:03 UTC | May 20, 19:00 UTC | 22h 58m |
| 2026-05-18 | WJA386 | YVR → YHZ | May 18, 23:15 UTC | May 19, 01:25 UTC | 2h 10m |
| 2026-05-18 | WJA386 | YVR → YHZ | May 18, 23:15 UTC | May 19, 23:00 UTC | 23h 45m |
| 2026-05-18 | WJA385 | YHZ → YVR | May 18, 19:40 UTC | May 18, 22:00 UTC | 2h 20m |
| 2026-05-18 | WJA37 | DUB → YYZ | May 18, 10:55 UTC | May 18, 17:50 UTC | 6h 55m |
| 2026-05-18 | WJA36 | YYZ → DUB | May 18, 02:45 UTC | May 18, 09:10 UTC | 6h 25m |
| 2026-05-17 | WJA2500 | YYZ → LIR | May 17, 13:09 UTC | May 18, 11:35 UTC | 22h 27m |
| 2026-05-17 | WJA2500 | YYZ → LIR | May 17, 13:10 UTC | May 17, 16:01 UTC | 2h 50m |
| 2026-05-16 | WJA35 | DUB → YYZ | May 16, 11:25 UTC | May 16, 18:35 UTC | 7h 10m |
| 2026-05-16 | WJA34 | YYZ → DUB | May 16, 03:25 UTC | May 16, 09:45 UTC | 6h 21m |
| 2026-05-15 | WJA2101 | PUJ → YYZ | May 15, 13:50 UTC | May 15, 23:35 UTC | 9h 44m |
| 2026-05-14 | WJA2785 | SJD → YYZ | May 14, 20:46 UTC | May 15, 15:00 UTC | 18h 14m |
| 2026-05-14 | WJA2784 | YYZ → SJD | May 14, 14:33 UTC | May 15, 11:45 UTC | 21h 13m |
| 2026-05-14 | WJA2784 | YYZ → SJD | May 14, 14:35 UTC | May 14, 17:50 UTC | 3h 15m |
| 2026-05-13 | WJA2561 | KIN → YYZ | May 13, 15:25 UTC | May 14, 01:35 UTC | 10h 10m |
| 2026-05-12 | WJA1410 | YYC → MCO | May 12, 15:10 UTC | May 12, 20:01 UTC | 4h 50m |
| 2026-05-12 | WJA1410 | YYC → MCO | May 12, 15:10 UTC | May 12, 23:55 UTC | 8h 46m |
| 2026-05-11 | WJA1162 | YYC → PHX | May 11, 21:05 UTC | May 12, 03:35 UTC | 6h 30m |
| 2026-05-09 | WJA2200 | YYC → MEX | May 9, 14:45 UTC | May 10, 02:50 UTC | 12h 5m |
| 2026-05-08 | WJA1553 | SEA → YYC | May 8, 17:44 UTC | May 9, 17:00 UTC | 23h 16m |
| 2026-05-08 | WJA387 | YHZ → YEG | May 8, 03:44 UTC | May 8, 05:54 UTC | 2h 10m |
| 2026-05-08 | WJA387 | YHZ → YEG | May 8, 03:43 UTC | May 8, 22:30 UTC | 18h 47m |
| 2026-05-07 | WJA811 | YHZ → YYZ | May 7, 23:39 UTC | May 8, 01:40 UTC | 2h 0m |
| 2026-05-07 | WJA33 | FCO → YYC | May 7, 05:25 UTC | May 7, 11:25 UTC | 6h 0m |
| 2026-05-06 | WJA32 | YYC → FCO | May 6, 15:05 UTC | May 6, 20:20 UTC | 5h 15m |
| 2026-05-06 | WJA32 | YYC → FCO | May 6, 15:01 UTC | May 7, 11:25 UTC | 20h 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 .