91.245.37.0/24
AS197394 · CJSC Telecommunications 21
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inetnum: 91.245.32.0 - 91.245.63.255 netname: TELE21-NET country: RU org: ORG-TELE16-RIPE admin-c: MUHA1-RIPE tech-c: MUHA1-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: T21V-MNT mnt-routes: T21V-MNT mnt-domains: T21V-MNT notify: info@t21v.ru created: 2012-08-17T12:53:06Z last-modified: 2019-03-29T07:19:16Z source: RIPE sponsoring-org: ORG-Vs35-RIPE abuse-email: ruslan@t21v.ru abuse-c: ACRO23286-RIPE abuse-org: ORG-Vs35-RIPE organisation: ORG-TELE16-RIPE org-name: CJSC Telekommunikacii 21 country: RU org-type: OTHER address: 420111 Russia, Kazan, Tazzi Gizzata 6/31, e-mail: info@t21v.ru abuse-c: ACRO23286-RIPE mnt-ref: vissado-mnt mnt-by: vissado-mnt created: 2019-03-19T08:30:12Z last-modified: 2022-12-01T16:55:01Z source: RIPE person: Muharljamov Ruslan Rafikovich address: Russia, g.Kazan ul.Ostrovskogo d.89 phone: +78432215899 e-mail: info@t21v.ru nic-hdl: MUHA1-RIPE mnt-by: T21V-MNT created: 2012-08-09T19:37:30Z last-modified: 2012-08-09T19:37:31Z 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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