Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.


See also: Requirements for Federal Websites and Digital Services

Second-level domains

TTS owns a number of second-level domains. Information from DotGov on getting a new one. Purchases/renewals are done through micropurchase requests.


DNS for domains in TTS is managed one of a few ways—see this diagram. For those that are managed within TTS, see the DNS repository.

DNSSEC (and thus Federalist) do not support DNSSEC.

For domains owned by TTS that speak HTTP, TTS follows the requirements of OMB M-15-13, including HTTP Strict Transport Security and the recommended additional step of HSTS preloading.

For information on how HTTPS and HSTS compensate for an absence of DNSSEC for HTTP-based services, see:


Information from