To register domains:
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InterNIC: www.internic.net
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Network Solutions: www.networksolutions.com
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register.com: www.register.com
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DNSstuff: www.dnsstuff.com
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DNSBL.info: www.dnsbl.info
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Institute of Electrical and Electronics Engineers: www.ieee.org
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International Organization for Standardization: www.iso.org
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Internet Engineering Task Force: www.ietf.org
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Internet Society: www.isoc.org