What type of aircraft is EI-EFK?

EI-EFK is a Boeing 737-800 (B738).

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

What is the ICAO 24-bit address of EI-EFK?

4CA766. 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 67 days since 2026-08-26.

Ryanair Boeing 737-800 EI-EFK broadcasts on ICAO24 4CA766. It was built by Boeing. One pilot has caught this exact tail in Skydex.

9 Skydex receivers (Derbyshire, Andrew, station-1020) have heard EI-EFK, 67 sightings since 26 Aug 2026; last on 10 Nov 2026.

Lee Hall — 🇬🇧 United Kingdom · Derbyshire · run by @leehall — 1 airframe, 49 sightings, last 2026-11-10
Andrew · run by @andrew-peacock — 1 airframe, 37 sightings, last 2026-11-10
station-1020 · run by @joseph-furber — 1 airframe, 34 sightings, last 2026-11-10
fr-wolfheze — 🇳🇱 Netherlands · near Arnhem · run by @youri-tromp — 1 airframe, 26 sightings, last 2026-11-10
Swadlincote — 🇬🇧 United Kingdom · Derbyshire · run by @swadlincote — 1 airframe, 25 sightings, last 2026-11-10
Fips — 🇩🇪 Germany · Baden-Württemberg · run by @fips — 1 airframe, 24 sightings, last 2026-11-10
Lipa Piotrowska West Wroclaw Poland — 🇵🇱 Poland · near Wrocław · run by @barcik — 1 airframe, 22 sightings, last 2026-11-10
Anglesey, GB — 🇬🇧 United Kingdom · Anglesey · run by @karl-owen — 1 airframe, 20 sightings, last 2026-11-08
Braunschweig, Gartenstadt — 🇩🇪 Germany · Lower Saxony · run by @thatred — 1 airframe, 19 sightings, last 2026-11-10