2620:13::/48 - SV-IPV6-01
AS11647 Sentex Communications Corporation
V6NetHandle: NET6-2620-13-1 OrgID: SU Parent: NET6-2620-1 NetName: SV-IPV6-01 NetRange: 2620:13:: - 2620:13:0:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 11647 RegDate: 2010-12-10 Updated: 2015-03-18 TechHandle: NETWO7253-ARIN NOCHandle: NETWO7253-ARIN AbuseHandle: NETWO7253-ARIN Source: ARIN
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.