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Icom-web
Registration, hosting and redirection services.
http://www.icom-web.com/

IE Internet.com
Domain name registration for Irish Business.
http://www.ieinternet.com/

IM1
.com .net and .org domain registrations.
http://www.im1.com/

Indian Registry
Site offers domain name registration, transfer, but does not offer credit card ordering.
http://www.indianregistry.net/

InexpensiveDomains.com
Low cost domain name registration, expired domain name lists and free web site promotion.
http://inexpensivedomains.com/

infoDNS
Domain name search, registration and services.
http://www.infodns.com/

Internet Connection
Offers domain name-related services including domain name registration.
http://www.icdomainnames.com/

Internet Registration.com
Domain name registration and affiliate program. Web-based domain name management.
http://www.internetregistration.com

InternetMasters.com
Various TLD registrations, transferring and hosting.
http://www.internetmasters.com/

Internetters Limited
Register the internet domain name online.
http://www.internetters.co.uk/

Internic Domain Services
Domain registration services, register your top level domain names with us.
http://www.internicdomainservices.net/

Interprise
Domain registration, hosting, virtual mail setup and e-commerce solutions to the SOHO and SME market in South Africa.
http://www.interprise.co.za/

Interspeed Web Solutions
Free domain name registration service and parking, free listing of domain names for sale.
http://netnameexchange.com/

Intralinx Internet Services
Site offers domain name registration, commercial web hosting and design.
http://www.intralinx.net

Irish Domains Ltd
Irish Domains Ltd provide domain name registration and web hosting services for Irish companies.
http://www.irishdomains.com/

Its Your Domain
ICANN accredited registration, with a transparent affiliate program.
http://www.itsyourdomain.com/