AS11722 Westelcom Internet, Inc.
2606:1b00::/32 - WFC-IPV6BLK-1
V6NetHandle: NET6-2606-1B00-1 OrgID: WFC-22 Parent: NET6-2600-1 NetName: WFC-IPV6BLK-1 NetRange: 2606:1B00:: - 2606:1B00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11722 RegDate: 2011-09-30 Updated: 2012-03-02 Source: ARIN OrgID: WFC-22 OrgName: Westelcom Internet, Inc. CanAllocate: Street: 130 Park Place City: Watertown State/Prov: NY Country: US PostalCode: 13601 RegDate: 1999-02-02 Updated: 2017-01-28 OrgTechHandle: OPERA-ARIN OrgAdminHandle: ADMIN1-ARIN OrgAbuseHandle: NETWO6-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.