Subdomain
A prefix added to a domain to create a separate address, such as blog.example.com or app.example.com.
- glossary
A subdomain is a prefix added to your domain to create a distinct address under it — blog.example.com, app.example.com, or mail.example.com are all subdomains of example.com. You create one by adding a DNS record (usually an A or CNAME) at the nameservers for the parent domain, with no extra registration or fee. Subdomains let one registered name host many services, which is why they are a building block for sites, apps, and APIs.
Related keywords
- subdomain
- host
- blog.example.com
- DNS
- second-level domain
Contributors
Namefi is a collective of engineers, designers, and operators who obsess over building tools that make managing your onchain domain names effortless.
Victor Zhou is a technology founder and standards editor focused on digital identity and trust. He founded Namefi, edits Ethereum Improvement Proposals, and previously led smart-contract architecture work at Google Labs.
His work sits at the intersection of naming, ownership, and the systems people use to establish identity online. That perspective makes him especially interested in the way names move between personal meaning, public recognition, and digital infrastructure.
For Namefi, Victor edits and writes about domains as durable digital identity: how names become ownable onchain assets, how tokenization changes custody and trust, and what naming can learn from the systems people use to establish identity online.