87.103.176.0/20
AS12389 · PJSC Rostelecom
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inetnum: 87.103.176.0 - 87.103.191.255 netname: RU-SIBNET-OMSK status: LIR-PARTITIONED PA descr: Allocation for Omsk regional branch of the JSC Sibirtelecom. country: RU admin-c: NSOE11-RIPE tech-c: NSOE22-RIPE notify: noc@sibnet.ru mnt-by: NSOELSV-NCC mnt-lower: OEC-MNT mnt-domains: OEC-MNT mnt-routes: OEC-MNT created: 2005-11-08T05:22:38Z last-modified: 2005-11-08T05:22:38Z source: RIPE abuse-email: abuse@rt.ru abuse-c: RTNC-RIPE abuse-org: ORG-JR8-RIPE role: NSOELSVZ admin-c role address: JSC Sibirtelecom address: 18, Ordjenikidze str., address: 630099, Novosibirsk, Russia phone: +7 383 2 270669 fax-no: +7 383 2 270017 e-mail: noc@sinor.ru admin-c: YOL1-RIPE admin-c: VIK15-RIPE tech-c: YOL1-RIPE tech-c: VIK15-RIPE nic-hdl: NSOE11-RIPE notify: noc@sinor.ru mnt-by: NSOELSV-NCC created: 2005-03-29T04:58:27Z last-modified: 2008-09-08T05:37:10Z source: RIPE role: NSOELSVZ tech-c role address: JSC Sibirtelecom address: 18, Ordjenikidze str., address: 630099, Novosibirsk, Russia phone: +7 383 2 270669 fax-no: +7 383 2 270017 e-mail: noc@sinor.ru admin-c: YOL1-RIPE admin-c: VIK15-RIPE tech-c: YOL1-RIPE tech-c: VIK15-RIPE nic-hdl: NSOE22-RIPE notify: noc@sinor.ru mnt-by: NSOELSV-NCC created: 2005-03-29T04:55:41Z last-modified: 2008-09-08T05:37:11Z source: RIPE route: 87.103.176.0/20 descr: RU-SIBNET-OMSK origin: AS8594 mnt-by: OEC-MNT created: 2005-11-08T09:56:40Z last-modified: 2005-11-08T09:56:40Z 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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