AS21947 Blackfoot Telephone Cooperative, Inc.
2001:1940::/32 - BLACKFOOT
V6NetHandle: NET6-2001-1940-1 OrgID: BTC-13 Parent: NET6-2001-1800-0 NetName: BLACKFOOT NetRange: 2001:1940:: - 2001:1940:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 21947 RegDate: 2004-06-15 Updated: 2013-07-22 Source: ARIN OrgID: BTC-13 OrgName: Blackfoot Telephone Cooperative, Inc. CanAllocate: Street: 1221 N. Russel St. City: Missoula State/Prov: MT Country: US PostalCode: 59808 RegDate: 1999-08-11 Updated: 2017-01-28 OrgTechHandle: SFL52-ARIN OrgTechHandle: RWI90-ARIN OrgTechHandle: FEENS-ARIN OrgTechHandle: DOMBR8-ARIN OrgNOCHandle: RWI90-ARIN OrgNOCHandle: FEENS-ARIN OrgAdminHandle: MWO19-ARIN OrgAbuseHandle: NAE2-ARIN Source: ARIN POCHandle: MWO19-ARIN IsRole: N LastName: Worden FirstName: Mary Street: 1221 N. Russell St. City: Missoula State/Prov: MT Country: US PostalCode: 59808 RegDate: 2004-08-02 Updated: 2013-02-08 OfficePhone: +1-406-541-5012 Mailbox: firstname.lastname@example.org Source: ARIN POCHandle: NAE2-ARIN IsRole: Y LastName: Network Abuse Email FirstName: Street: 1221 North Russell St City: Missoula State/Prov: MT Country: US PostalCode: 59808 RegDate: 2005-01-18 Updated: 2018-11-19 OfficePhone: +1-406-541-5000 Mailbox: email@example.com 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.