77.51.224.0/21
AS25515 · PJSC Rostelecom
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inetnum: 77.51.218.0 - 77.51.231.255 netname: MACROREGIONAL_CENTER descr: ex-netname: CTC-DSLAM-4 descr: OJSC Rostelecom, Moscow Region Branch descr: DSL access network in Moscow region country: RU admin-c: CTC1-RIPE tech-c: CTC1-RIPE status: ASSIGNED PA mnt-by: MNT-CTC created: 2011-10-27T11:40:44Z last-modified: 2012-08-17T12:50:35Z source: RIPE abuse-email: abuse@rt.ru abuse-c: RTNC-RIPE abuse-org: ORG-JR8-RIPE role: OJSC Rostelecom address: 29/2 Narodnogo Opolcheniya str., address: 123154, Moscow abuse-mailbox: ripe@rt.ru e-mail: vyacheslav.shelukhin@rt.ru e-mail: yurov@mo.center.rt.ru admin-c: AY25515 tech-c: AY25515 nic-hdl: CTC1-RIPE mnt-by: MNT-CTC created: 2009-06-29T07:45:40Z last-modified: 2022-02-18T14:02:19Z source: RIPE route: 77.51.0.0/16 descr: MACROREGIONAL_CENTER descr: Rostelecom, Moscow Region Branch origin: AS25515 mnt-by: MNT-CTC created: 2008-10-30T08:46:09Z last-modified: 2018-10-19T11:38:42Z source: RIPE mnt-routes: ROSTELECOM-MNT mnt-routes: MNT-CTC
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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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