All TLDs / .sener

What is .sener?

The short answer
.sener is a brand top-level domain, operated by Sener Ingeniería y Sistemas, S.A. It's a “dot-brand” registry (ICANN Spec 13) — reserved for the operator's own use, so it isn't open for the public to register. It's live in the official IANA DNS root zone.
Type
Brand (dot-brand)
Registration
Closed (brand)
In DNS root
Yes
Operator
Sener Ingeniería y Sistemas, S.A

Source: IANA root zone database, checked October 18, 2026.

Is .sener a real domain extension?

Yes — .sener is a real top-level domain. It's present in the official IANA DNS root zone, which is the authoritative list of every live TLD on the internet.

Who runs .sener?

.sener is operated by Sener Ingeniería y Sistemas, S.A., per the IANA root database.

What is .sener used for?

.sener is a dot-brand registry — it's reserved for Sener Ingeniería y Sistemas, S.A. and isn't used for third-party websites.

Can anyone register a .sener domain?

No. .sener is a closed brand registry, so it isn't available for public registration. A registrar search will confirm the current policy for any specific name.