Registrar : an ICANN-accredited registrar
An individual or legal entity wishing to register a domain name under a generic top-level domain ("gTLD") (http://www.icann.org/en/resources/registries/listing) may do so by using an ICANN-accredited registrar. There are several hundred accredited registrars located throughout the world that provide support in local languages. For a list of all current ICANN-accredited registrars, please see http://www.internic.net/regist.html. The relationship between a domain name registrant and the ICANN-accredited registrar is governed by a Registration Agreement between the two parties.
Registrant Rights and Responsibilities
ICANN has published a Registrant Rights and Responsibilities document that identifies and summarizes currently existing registrant rights and responsibilities arising from the 2009 Registrar Accreditation Agreement (RAA), and within ICANN Consensus Policies and specifications, as they are incorporated in the RAA. This published document is the result of initial input from a joint working group of the GNSO and the At-Large Advisory Committee and subsequent consultations with the registrars. The Registrant Rights and Responsibilities document can be found here: http://www.icann.org/en/resources/registrars/registrant-rights-responsibilities
About ICANN-Accredited Registrar
Any entity that wants to offer domain name registration services under gTLDs with a direct access to the gTLD registries is required to obtain an accreditation from ICANN. To that end, the interested entity must apply for accreditation and demonstrate that it meets all the technical, operational and financial criteria necessary to qualify as a registrar business. The relationship between ICANN and every accredited registrar is governed by the individual Registrar Accreditation Agreements (RAA), which set out the obligations of both parties.
What We Do
ICANN staff provides registrars, registrants and the general public with information and general support with regard to ICANN-accredited registrars, and the ICANN RAA. Staff also assists prospective registrars with preparing and reviewing their accreditation applications, as well as maintaining registrar accreditations and ensuring registrar compliance with RAA obligations.
The ICANN-accreditation only applies for gTLDs. Any person or legal entity that wants to obtain information about registration or accreditation under a country code top-level domain should contact the corresponding registry operator.
Read more : http://www.icann.org/en/resources/registrars