• String Policy
  • Reserved Names Policy
  • Privacy Protection and WHOIS/RDAP Policy
  • Domain Name Transfer Policy
  • Anti-Abuse Policy
  • Sunrise Registration Policy
  • General Availability Registration Policy
  • Domain Name Dispute Resolution Policies
  • DNSSEC Practice Statement
  • ICANN Policies
  • Website Privacy Policy
  • Website Terms of Use

1. General

This Registry String Policy is incorporated by reference into the Registration Agreement between the Registrar and the Registrant. It forms an integral part of the Registry Policies and establishes the requirements governing the registration of second-level domain names under the .REN Top-Level Domain (TLD).


2. Technical Requirements for Domain Name Strings

A domain name consists of one or more labels (each referred to in this Policy as a "string"). Each domain name label must comply with the requirements set forth in Section 3.5 of RFC 1034. Any application for a domain name that does not comply with this String Policy (or any other applicable Registry Policy) shall not be accepted for registration.


3. ASCII Strings

ASCII domain names, including A-labels derived from Internationalized Domain Names (IDNs), must comply with the following requirements:

  1. The second-level domain label must not exceed 63 ASCII characters.

  2. The string may contain only the letters a–z (case-insensitive), the digits 0–9, and the ASCII hyphen (-).

  3. A hyphen (-) must not appear at the beginning or end of the string.

In addition, the third and fourth characters of an ASCII domain label must not both be hyphens. For example, a domain name such as ad--cd.ren is not eligible for registration.


4. Internationalized Domain Name (IDN) Strings

Internationalized Domain Names (IDNs) enable domain names to be represented in languages and scripts other than English.

All IDN labels must satisfy the "IDNA-valid" requirements specified in Section 2.3.2.1 of RFC 5890. The .REN Registry supports Chinese-language IDN strings in accordance with RFC 4713. Only Chinese characters included in the following IDN tables are supported:

CNNIC IDN Table

http://www.iana.org/domains/idn-tables/tables/cn_zh-cn_4.0.html；

TWNIC IDN Table

http://www.iana.org/domains/idn-tables/tables/tw_zh-tw_4.0.1.html