192.121.218.0/24
AS41884 · Swedish Civil Contingencies Agency
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inetnum: 192.121.218.0 - 192.121.218.255 netname: SE-CERT-SE descr: CERT-SE org: ORG-SIC4-RIPE country: SE admin-c: ERLI3-RIPE tech-c: FRER1-RIPE status: LEGACY mnt-by: RESILANS-MNT mnt-lower: RESILANS-MNT mnt-routes: SITIC-MNT notify: c+1588@resilans.se created: 2010-02-10T13:58:49Z last-modified: 2025-02-07T08:37:45Z source: RIPE abuse-email: abuse@cert.se abuse-c: ABUS1912-RIPE abuse-org: ORG-SIC4-RIPE organisation: ORG-SIC4-RIPE org-name: Swedish Civil Contingencies Agency country: SE org-type: OTHER address: 651 81 Karlstad e-mail: cert@cert.se abuse-c: ABUS1912-RIPE mnt-ref: RESILANS-MNT mnt-by: RESILANS-MNT created: 2006-11-08T10:23:45Z last-modified: 2022-12-01T16:51:45Z source: RIPE person: Erik Linder address: Myndigheten för samhallsskydd och beredskap address: Terminalvagen 14 address: SE-171 73 Solna address: Sweden phone: +46 10 240 40 40 e-mail: drift@cert.se nic-hdl: ERLI3-RIPE mnt-by: RESILANS-MNT created: 2014-04-10T09:23:31Z last-modified: 2020-10-29T09:59:26Z source: RIPE person: Fredrik Eriksson address: Myndigheten for Samhallsskydd och Beredskap address: Terminalvagen 14 address: SE-171 73 Solna address: Sweden phone: +46 10 240 40 40 e-mail: sysadmin@cert.se nic-hdl: FRER1-RIPE mnt-by: RESILANS-MNT created: 2025-02-07T08:37:45Z last-modified: 2025-02-07T08:37:45Z source: RIPE route: 192.121.218.0/24 descr: CERT-SE origin: AS41884 mnt-by: RESILANS-MNT remarks: Email abuse to: abuse@cert.se created: 2007-05-14T10:52:08Z last-modified: 2014-04-25T11:18:17Z 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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