78.81.136.0/24
AS12389 · PJSC Rostelecom
WHOIS Details
inetnum: 78.81.128.0 - 78.81.143.255 netname: RU-AVANGARD-DSL descr: OJSC Rostelecom North-West descr: Karelian branch of the OJSC Rostelecom descr: 4 M.Gorkogo st., 185035, Petrozavodsk, Russia country: RU admin-c: RCR3-RIPE tech-c: RCR3-RIPE status: ASSIGNED PA mnt-by: AS8997-MNT mnt-lower: AS8997-MNT mnt-domains: AS8997-MNT mnt-routes: AS8997-MNT notify: lir@dtd.ptn.ru created: 2014-02-04T10:23:44Z last-modified: 2014-02-04T10:23:44Z source: RIPE abuse-email: abuse@rt.ru abuse-c: RTNC-RIPE abuse-org: ORG-JR8-RIPE role: ru.spbnit contact role address: OJSC Rostelecom address: 191186, St.-Petersburg address: Russia phone: +7 812 595 45 56 e-mail: gsz.lir@nw.rt.ru remarks: -------------------------------------------- admin-c: AA728-RIPE admin-c: VE128-RIPE tech-c: AA728-RIPE tech-c: VE128-RIPE tech-c: TR4627-RIPE tech-c: RT8555-RIPE nic-hdl: RCR3-RIPE remarks: -------------------------------------------- remarks: General questions: ip-noc(at)nw.rt.ru remarks: Routing & peering: ip-noc(at)nw.rt.ru remarks: -------------------------------------------- abuse-mailbox: abuse@rt.ru mnt-by: AS8997-MNT created: 2002-09-04T09:29:24Z last-modified: 2023-04-20T16:55:52Z source: RIPE route: 78.81.128.0/20 descr: Rostelecom networks origin: AS12389 notify: ripe@rt.ru mnt-by: ROSTELECOM-MNT created: 2018-10-31T11:47:14Z last-modified: 2018-10-31T11:47:14Z source: RIPE
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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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