One name, many suffixes
Type "putlocker" into a search engine and the suggestions come with a tail: putlocker to, putlocker is, putlocker bz, putlocker pe, putlocker rs, putlocker org, putlocker 123, putlocker plus, putlocker pro, putlocker today, putlocker new domain. Each suffix is a domain the name has lived on at some point, or a copy that borrowed it. The site people mean is the one you are on, and this address is the one to bookmark.
The addresses, in order
putlocker.com was the original file host, from 2011 until it became Firedrive in 2014. It was a place to upload and share files, and the name became famous because so many of those files were films. The history page tells that story.
putlocker.is was the movie site as most people remember it: the green film-reel logo, the green menu bar, the search form with director, starring, years and genres, the featured films and the A-Z list. It ran from 2013 and was the busiest address of the name until 2016. This site is built on that design.
putlocker.bz, putlocker.to, putlocker.pe, putlocker.rs, putlocker.gg, putlocker.xyz, putlocker.ch, putlocker.ac, putlocker.il, putlocker.org, putlocker.is.org, putlocker123, putlocker plus, putlocker pro, putlocker mix, putlocker today: the copies and successors, each a snapshot of the idea on a new suffix, each searched for by the people who used it. None of them is needed now; the official address carries everything they carried and more.
putlockers, with an s, is the same name as most of the world types it: it is the bigger search in the United Kingdom, Canada, Australia and India, and it lands here too.
Putlocker new domain
People search "putlocker new domain" and "putlocker new site" whenever a copy they used goes dark. The answer is always the same: this address. It does not move. Save it to your home screen and the question never comes up again, because the icon opens the site directly.
Mirrors and proxies
A Putlocker mirror is a copy of the site on a second address, and a Putlocker proxy is an address that passes your visit through to the site. Both exist because copies of the name were blocked in some countries. The official address works everywhere; if your school, office or hotel network filters entertainment sites, the proxy and VPN page explains the two clean ways round it. Addresses you find on a mirror list are somebody else's site with the Putlocker name on it.
How to tell you are on the real Putlocker
The real site has the film reel and the PUT LOCKER wordmark with the padlock in the O, the green menu bar under a white header, and a search form with director, starring, years and genre boxes. Every title has a page with a synopsis, the cast, seasons for series, and a Watch now button that lists services by country. There is no registration, no download button pointing at an .exe, and no pop-up asking for a card number. A page that asks for any of those is not this site.