# .tez TLD

Currently, the only supported top-level domain is `.tez`. On testnets, it's always named after the name of the protocol (e.g. `.delphi`, `.edo`, etc.) to avoid potential confusion between a testnet and the mainnet. You can find the corresponding TLDRegistrar addresses in the Deployed Contracts section.

### Label Validation for .tez

In addition to the rules specified in [Name Validation and Normalization](/interoperability/name-resolution.md#name-validation-and-normalization), the top-level domain requires all labels to only contain the Latin characters `a-z`, `0-9`, and hyphens (`-`). Hyphens cannot appear as the first or the last character.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developers.tezos.domains/interoperability/.tez-tld.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.