I can find official registration websites for UK (G-INFO), USA(FAA Registry) and Canada (Transport Canada), but what about other countries? Had a google about the other day looking for European ones, but I didn't throw up anything. If anyone know of any please post here and I will update this post.
United Kingdom - G-INFO (https://siteapps.caa.co.uk/g-info/)
United States - FAA Registry (https://www.faa.gov/licenses_certificates/aircraft_certification/aircraft_registry/)
Canada - Transport Canada (https://wwwapps.tc.gc.ca/saf-sec-sur/2/ccarcs-riacc/RchSimp.aspx)
Isle of Mann - Isle of Mann Aircraft Registry (https://ardis.iomaircraftregistry.com/register/search)
France - Immatriculation des aéronefs (https://immat.aviation-civile.gouv.fr/immat/servlet/aeronef_liste.html)
Ireland - Irish Aviation Authority Registry (https://www.iaa.ie/commercial-aviation/aircraft-registration-2/latest-register-and-monthly-changes-1)
Guernsey - 2-REG Aircraft Registry (https://www.2-reg.com/legislation/register/)
Australia - Aircraft Registry Search (https://www.casa.gov.au/aircraft-register)
Cayman Islands - Active Aircraft Register (https://www.caacayman.com/wp-content/uploads/pdf/Active%20Aircraft%20Register.pdf)
Singapore - Civil Aviation Authority of Singapore (https://www.caas.gov.sg/operations-safety/aircraft/certificate-of-registration) (PDF Download Link in page)
Sri Lanka - SL Aircraft Register (https://www.caa.lk/en/downloads/sl-aircraft-register)
Switzerland - Swiss Aircraft Register (https://app02.bazl.admin.ch/web/bazl/en/#/lfr/search)
The Netherlands - Luchtvaartuigregister (https://www.ilent.nl/onderwerpen/luchtvaartuigregister)
Austria - Austro Control (https://www.austrocontrol.at/en/aviation_agency/aircraft/aircraft_register/search_online)
Belgium - Belgian aircraft register (https://es.mobilit.fgov.be/aircraft-registry/main/search?lang=en)
Serbia - Aircraft Registry (http://cad.gov.rs/en/strana/20841/aircraft-registry#app)
Iceland - Aircraft Registry Lookup (https://www.icetra.is/aviation/aircraft/register/)
Tanzania - Aircraft Register (https://www.tcaa.go.tz/aircraft_register.php)
Czech Republic - LETECKÝ REJSTŘÍK (https://lr.caa.cz/letecky-rejstrik?lang=en)
Malaysia - Register Of Apparatus Assignments Search (https://www.skmm.gov.my/en/legal/registers/register-of-apparatus-assignments-search?src=&fld=Holder&type=AAAero)
Sweden - Luftfartygsregistret (https://sle-p.transportstyrelsen.se/extweb/en-gb/sokluftfartyg)
South Africa - Aircraft Register (http://www.caa.co.za/Pages/Airworthiness/Aircraft_Register_List.aspx) (should be uploaded on this page at an unknown date)
Malta - Aircraft Flight Standards Registry (https://www.transport.gov.mt/aviation/aircraft-flight-standards/registration-of-aircraft-2663)
Russian Federation - List of civil aircraft of the Russian Federation (https://reestrinform.ru/reestr-gvs/grazhdanskie-vozdushnye-suda.html)
Bulgaria - Bulgarian Aircraft Register (https://mhlegal.eu/bulgarian-aircraft-register/)
Australia - Australian Aircraft register (https://www.casa.gov.au/search-centre/aircraft-register)
New Zealand - Aircraft register search (https://www.aviation.govt.nz/aircraft/aircraft-registration/aircraft-register-search/)
Latvia - Lavtvian Aircraft register (https://www.caa.gov.lv/lv/gaisa-kugu-registrs)
Bermuda -> Russian Reg Change list - Bermuda Aircraft Registry – Russian Air Operators (https://www.bcaa.bm/sites/default/files/Web%20Docs/Notices_BACs_OTARs/Bermuda%20Aircraft%20Registry%20-%20Russian%20Air%20Operators.pdf)
Updated 25/09/2020 - IoM, French, Irish and Guernsey Registry added
Updated 26/09/2020 - Australia, Cayman Islands, Singapore, Sri Lanka and Switzerland added
Updated 28/09/2020 - The Netherlands, Austria, Belgium, Serbia, Iceland, Tanzania, Czech Republic, Malaysia, Sweden and South Africa added
Updated 24/01/2021 - Malta
Updated 16/05/2021 - Updated FAA link, Russian Federation added
Updated 21/01/2021 - Updated Netherlands link
Updated 22/03/2022 - Bulgaria added
Updated 12/01/2023 - Australia, New Zealand and Latvia added, plus Bermudan to Russian regc-changes.
Some of these can yield results:
https://www.iaa.ie/general-aviation/aircraft-registration-leasing/current-aircraft-register-and-monthly-changes
https://wwwapps.tc.gc.ca/Saf-Sec-Sur/2/CCARCS-RIACC/RchSimp.aspx
https://immat.aviation-civile.gouv.fr/immat/servlet/aeronef_liste.html
https://ardis.iomaircraftregistry.com/register/search
Thanks Anmer :)
Some more official sites from around the world.
Australia https://www.casa.gov.au/aircraft/civil-aircraft-register
Cayman Islands https://www.caacayman.com/wp-content/uploads/pdf/Active%20Aircraft%20Register.pdf
Singapore https://www.caas.gov.sg/operations-safety/aircraft/certificate-of-registration (link to download on page)
Sri Lanka https://www.caa.lk/en/downloads/sl-aircraft-register
Switzerland https://app02.bazl.admin.ch/web/bazl/en/#/lfr/search
Steve
Thanks Steve
I haven't verified them since last year.
But this may help
https://forum.flightradar24.com/forum/radar-forums/flightradar24-aircraft-database/10540-aircraft-register-lookup-pages
The Netherlands (PDF Download Link in page)
https://www.ilent.nl/onderwerpen/luchtvaartuigregister/documenten/publicaties/2020/08/10/luchtvaartuigregister---aircraft-registrations
Austria
https://www.austrocontrol.at/en/aviation_agency/aircraft/aircraft_register/search_online
Belgium: https://es.mobilit.fgov.be/aircraft-registry/main/search?lang=en
Serbia: http://cad.gov.rs/en/strana/20841/aircraft-registry#app
Iceland: https://www.icetra.is/aviation/aircraft/register/
Tanzania: https://www.tcaa.go.tz/aircraft_register.php
Czechia: https://lr.caa.cz/letecky-rejstrik?lang=en
Malaysia: https://www.skmm.gov.my/en/legal/registers/register-of-apparatus-assignments-search?src=&fld=Holder&type=AAAero
Sweden: https://sle-p.transportstyrelsen.se/extweb/sv-se/sokluftfartyg (only in Swedish)
South Africa: http://www.caa.co.za/Pages/Airworthiness/Aircraft_Register_List.aspx (should be uploaded on this page at an unknown date)
Thank you Oblivian, Flacon and Joodle.... I'd better pull my socks up and update the first post.
Russian Federation added and FAA link updated.
Bulgarian Aircraft Register added to list
Handy little list of Bermuda registered Russian Aircraft latest update 6th December
https://www.bcaa.bm/sites/default/files/Web%20Docs/Notices_BACs_OTARs/Bermuda%20Aircraft%20Registry%20-%20Russian%20Air%20Operators.pdf
Thanks Skecto
Added Australia, New Zealand and Latvia registries.
Howard Curtis's excellent links site always used to be the go-to for stuff like this.
It's still live, though I don't know how up-to-date it is.
https://www.aviation-links.co.uk/spotting_r.html