What aircraft is C-GMKS?

C-GMKS is a Boeing 787-9 Dreamliner (B789).

WestJet, going by the callsign it flew under when it was caught.

What is the ICAO 24-bit address of C-GMKS?

C0656F. The Mode S address is assigned to the airframe by its country of registration and stays the same from flight to flight.

On 2026-11-10. Our receivers have heard it on 61 days since 2026-09-04.

C-GMKS is a Boeing 787-9 Dreamliner operated by WestJet. It was built by Boeing. One pilot has caught this exact tail in Skydex.

Heard by 8 Skydex receivers (near Calgary, Andrew, Derbyshire): 61 sightings since 4 Sep 2026, last on 10 Nov 2026.

MPL-CYYC-ADSB — 🇨🇦 Canada · near Calgary · run by @keith-tweed — 1 airframe, 37 sightings, last 2026-10-27
Andrew · run by @andrew-peacock — 1 airframe, 31 sightings, last 2026-11-09
Lee Hall — 🇬🇧 United Kingdom · Derbyshire · run by @leehall — 1 airframe, 27 sightings, last 2026-11-09
station-1020 · run by @joseph-furber — 1 airframe, 25 sightings, last 2026-11-09
Anglesey, GB — 🇬🇧 United Kingdom · Anglesey · run by @karl-owen — 1 airframe, 22 sightings, last 2026-11-09
delapoleavenue — 🇬🇧 United Kingdom · Kingston upon Hull · run by @mark-healey — 1 airframe, 19 sightings, last 2026-11-01
saffayyc — 🇨🇦 Canada · near Calgary · run by @saffayyc — 1 airframe, 15 sightings, last 2026-11-10
Swadlincote — 🇬🇧 United Kingdom · Derbyshire · run by @swadlincote — 1 airframe, 13 sightings, last 2026-11-09