AS577 Bell Canada
2605:b100:500::/41 - QCMTL-2605-B100-500
V6NetHandle: NET6-2605-B100-500-1 OrgID: BELLM-10 Parent: NET6-2605-B100-1 NetName: QCMTL-2605-B100-500 NetRange: 2605:B100:500:: - 2605:B100:5FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reassignment OriginAS: 36522 RegDate: 2018-10-29 Updated: 2018-10-29 Source: ARIN OrgID: BELLM-10 OrgName: Bell Mobility, Inc. CanAllocate: Street: 1333 Carrie Derrick City: Montreal State/Prov: QC Country: CA PostalCode: H3C-5K4 RegDate: 2008-05-09 Updated: 2008-05-09 OrgTechHandle: WNNOC1-ARIN OrgNOCHandle: WNNOC1-ARIN OrgAdminHandle: WNNOC1-ARIN OrgAbuseHandle: MAHD-ARIN Source: ARIN POCHandle: WNNOC1-ARIN IsRole: Y LastName: Wireless National Network Operations Center FirstName: Street: 9292 Boulevard de L'Acadie City: Montreal State/Prov: QC Country: CA PostalCode: H4N-3C5 RegDate: 2005-12-02 Updated: 2019-04-17 OfficePhone: +1-514-925-2756 Mailbox: firstname.lastname@example.org Mailbox: email@example.com Source: ARIN POCHandle: MAHD-ARIN IsRole: Y LastName: Mobility Abuse Help Desk FirstName: Street: 9292 Boulevard de L'Acadie City: Montreal State/Prov: QC Country: CA PostalCode: H4N-3C5 RegDate: 2008-04-10 Updated: 2008-04-10 OfficePhone: +1-514-925-2756 Mailbox: firstname.lastname@example.org 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.