A project subname is a subname issued by a project, like yourname.base.eth or yourname.uni.eth. The project runs its own registration system, so you get one and manage it on the project's own site, not in the ENS App. One exception: you can set it as your primary name in the ENS App.

You register and renew on the project's own site. Each project runs its own registration and renewal system, with its own pricing and rules. Base issues its names as Basenames, at base.org/names.

Mostly no. Records like wallet addresses, avatars, and social handles are set through the project's interface, not the ENS App. What's editable varies by project, so make changes on the project's site.

Yes, you can set a project subname as your primary name. You set it onchain in the ENS App. Project subnames cannot be set at primary.ens.domains. That app takes .eth names and their onchain subnames only. Once set, ENS-aware apps will show your project subname wherever they'd otherwise show your 0x address.

A Basename, a name ending in base.eth, is already your primary name on Base from the moment you register it. Base sets that, it applies on Base only, and you can change it. Setting the same name as your Ethereum primary name is a separate step in the ENS App.

See Set your primary name.

From the project. ENS support can't issue, transfer, or recover a project subname — the project owns the registration system. Most projects publish help docs on their site; start there.

Each project owns a .eth name (base.eth, uni.eth, and so on) and uses it to issue subnames to users. The project controls the issuing system, so it sets the rules: who can claim, what records are editable, how renewal works. The subnames are real ENS names; they just live under the project's parent, not under one you own.

Register your own .eth name. With a .eth name you can set wallet addresses across chains, create your own subnames, edit your profile, and manage everything in the ENS App.

To get started, see Register a .eth name.