Allocated and Reserved AS blocks. Source: IANA AS Registry AUTONOMOUS SYSTEM NUMBERS (last updated 2007-06-21) The Autonomous System (AS) numbers are used by various routing protocols.

Number Description Whois Reference Registration Date; 0-65535: See Sub-registry 16-bit AS numbers [65536-65551: Reserved for use in documentation and sample code

CIDR is principally a bitwise, prefix-based standard for the representation of IP addresses and their routing properties. It facilitates routing by allowing blocks of addresses to be grouped into single routing table entries.

Some large /8 blocks of IPv4 addresses, the former Class A network blocks, are assigned in whole to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority (IANA), or a regional Internet registry.

Number Resources. We are responsible for global coordination of the Internet Protocol addressing systems, as well as the Autonomous System Numbers used for routing Internet traffic.

ripe-553: This document describes the RIPE community’s current IPv4 address allocation and assignment policies. They were developed through a bottom-up, consensus driven, open policy development process in the RIPE Address Policy Working Group (AP WG).

BGP - The Border Gateway Protocol / Advanced Internet Routing

Basic Networking Tutorial - a network is any collection of independent computers that communicate with one another over a shared network medium.A computer network is a collection of two or more connected computers.

A subnet mask is a 32- or 128-bit number used to divide IP addresses into network and host addresses for routing traffic within a subnet (or subnetwork).

Configuration management is a collection of processes and tools that promote network consistency, track network change, and provide up to date network documentation and visibility.