213.135.42.0/24
AS15396 · University of Warsaw
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inetnum: 213.135.32.0 - 213.135.63.255 netname: PL-ICM-20001019 country: PL org: ORG-IA45-RIPE admin-c: UWPL tech-c: UWPL status: ALLOCATED PA mnt-by: RIPE-NCC-HM-MNT mnt-by: UW-PL mnt-domains: ICM-PL created: 2001-12-14T18:45:21Z last-modified: 2016-06-24T10:43:20Z source: RIPE abuse-email: abuse@uw.edu.pl abuse-c: UWPL abuse-org: ORG-IA45-RIPE organisation: ORG-IA45-RIPE org-name: University of Warsaw country: PL org-type: LIR address: Krakowskie Przedmiescie 26/28 address: 00-927 address: Warsaw address: POLAND phone: +48225520527 fax-no: +48225520837 e-mail: net@adm.uw.edu.pl admin-c: UWPL tech-c: UWPL abuse-c: UWPL mnt-ref: RIPE-NCC-HM-MNT mnt-ref: UW-PL mnt-by: RIPE-NCC-HM-MNT mnt-by: UW-PL created: 2004-04-17T11:47:16Z last-modified: 2020-12-16T13:11:53Z source: RIPE role: University of Warsaw Network Department address: Dzial Sieci Komputerowych address: Uniwersytet Warszawski address: Krakowskie Przedmiescie 26/28 address: 00-927 Warszawa address: Poland phone: +48 22 5520527 fax-no: +48 22 8284195 e-mail: net@adm.uw.edu.pl abuse-mailbox: abuse@uw.edu.pl admin-c: PMIC1-RIPE tech-c: PMIC1-RIPE tech-c: DAVE5-RIPE tech-c: PZOL1-RIPE nic-hdl: UWPL mnt-by: UW-PL created: 2011-09-13T15:09:39Z last-modified: 2021-06-30T14:30:21Z source: RIPE
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What are IP address ranges?
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.
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