inetnum: 18.104.22.168 - 22.214.171.124 netname: SPNET remarks: INFRA-AW descr: Spectrum NET Ltd., Sofia country: BG admin-c: ZT13-ORG tech-c: PS5645 tech-c: RS2543-RIPE status: ASSIGNED PA notify: firstname.lastname@example.org mnt-by: SPNET-MNT created: 2003-04-16T13:20:08Z last-modified: 2010-09-14T14:17:38Z source: RIPE person: Peter Shtinkov address: Spectrum Net EOOD address: 36, G.M.Dimitrov blvd. address: BG 1797 Sofia address: Bulgaria phone: +359 2 9657611 fax-no: +359 2 9657646 nic-hdl: PS5645 mnt-by: SPNET-MNT notify: email@example.com created: 2002-07-31T10:18:31Z last-modified: 2002-07-31T10:18:31Z source: RIPE person: Rumiana Savova address: Spectrum Net EOOD address: 36, G.M.Dimitrov blvd. address: BG 1797 Sofia address: Bulgaria phone: +359 2 9657612 fax-no: +359 2 9657646 mnt-by: SPNET-MNT e-mail: firstname.lastname@example.org notify: email@example.com nic-hdl: RS2543-RIPE created: 2002-05-21T13:22:24Z last-modified: 2010-07-12T09:44:27Z source: RIPE person: Theodore Zahov address: Spectrum NET Ltd. address: 36 G.M. Dimitrov blvd. address: 1797 Sofia phone: +359 24890622 fax-no: +359 24890646 e-mail: firstname.lastname@example.org nic-hdl: ZT13-ORG notify: email@example.com mnt-by: SPNET-MNT created: 1970-01-01T00:00:00Z last-modified: 2010-06-24T12:55:27Z source: RIPE route: 126.96.36.199/24 descr: SPNET specific announce origin: AS8717 notify: firstname.lastname@example.org mnt-by: SPNET-MNT created: 2002-07-24T18:10:16Z last-modified: 2010-09-14T14:54:12Z source: RIPE
IP Addresses in this range
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.