151.251.164.0/23
AS29580 · A1 Bulgaria EAD
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inetnum: 151.251.160.0 - 151.251.167.255 netname: A1BG-Fiber-Power160 descr: A1 Bulgaria EAD country: BG admin-c: BH3761-RIPE geoloc: 43.85037449930263 25.960693359375 tech-c: BH3761-RIPE status: ASSIGNED PA mnt-by: AS13124-MNT created: 2012-09-28T12:21:20Z last-modified: 2018-05-30T11:09:18Z source: RIPE abuse-email: RIPE.Abuse@a1.bg abuse-c: AR14215-RIPE abuse-org: ORG-MN1-RIPE person: Bisser Hadjimarkov address: A1 Bulgaria EAD address: 1 Kukush str. address: BG 1345 Sofia address: Bulgaria phone: +359 2 881103540 nic-hdl: BH3761-RIPE mnt-by: AS12716-MNT created: 2015-05-20T07:26:12Z last-modified: 2018-05-29T14:26:09Z source: RIPE route: 151.251.0.0/16 descr: A1 BG Net origin: AS8717 mnt-by: SPNET-MNT mnt-by: AS13124-MNT created: 2021-04-23T07:00:26Z last-modified: 2022-11-28T16:20:10Z 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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