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[IP-Doc.com] RFC 950 - Internet Standard Subnetting Procedure
[IP-Doc.com] RFC 1519 - Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy
[IP-Doc.com] RFC 1860 - Variable Length Subnet Table For IPv4
[IP-Doc.com] RFC 3021 - Using 31-Bit Prefixes on IPv4 Point-to-Point Links
JP's Domain - Net Tools
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