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Registrar Information Library

The following Registrar library was developed to enable Registrars to easily find the pages and information they might need. 


Current Registrar News and Events
Find the latest status updates, recordings of past meetings, and opportunities to participate
Learn more about Registrars
Learn more about Registrars, their purpose, process, and opportunities to participate
How to Become a Registrar
Learn more about what's involved with becoming a Registrar
Registrar Accreditation Application
Download and complete the Registrar Accreditation Application
Accredited Registrar Contact Information
Contact Information for ICANN Accredited Registrars
Data Escrow Program
Learn more about the Data Escrow agreement and program.

The table below is sortable and searchable by clicking at the top of each column and or typing into the search field.

Categories: Accreditation | Advisory | Contact Info | Policy | Registrar Changes and Updates | Resource | Rr Archived | Waiver Language Codes: English EN | Arabic AR | Spanish  ES | French FR | Russian RU | Chinese ZH | Japanese JA | Korean KO | Portugues PO | German DE | Italian IT 

Registrar Details

Domain Name System
Internationalized Domain Name ,IDN,"IDNs are domain names that include characters used in the local representation of languages that are not written with the twenty-six letters of the basic Latin alphabet ""a-z"". An IDN can contain Latin letters with diacritical marks, as required by many European languages, or may consist of characters from non-Latin scripts such as Arabic or Chinese. Many languages also use other types of digits than the European ""0-9"". The basic Latin alphabet together with the European-Arabic digits are, for the purpose of domain names, termed ""ASCII characters"" (ASCII = American Standard Code for Information Interchange). These are also included in the broader range of ""Unicode characters"" that provides the basis for IDNs. The ""hostname rule"" requires that all domain names of the type under consideration here are stored in the DNS using only the ASCII characters listed above, with the one further addition of the hyphen ""-"". The Unicode form of an IDN therefore requires special encoding before it is entered into the DNS. The following terminology is used when distinguishing between these forms: A domain name consists of a series of ""labels"" (separated by ""dots""). The ASCII form of an IDN label is termed an ""A-label"". All operations defined in the DNS protocol use A-labels exclusively. The Unicode form, which a user expects to be displayed, is termed a ""U-label"". The difference may be illustrated with the Hindi word for ""test"" — परीका — appearing here as a U-label would (in the Devanagari script). A special form of ""ASCII compatible encoding"" (abbreviated ACE) is applied to this to produce the corresponding A-label: xn--11b5bs1di. A domain name that only includes ASCII letters, digits, and hyphens is termed an ""LDH label"". Although the definitions of A-labels and LDH-labels overlap, a name consisting exclusively of LDH labels, such as"""" is not an IDN."