General Info
Whois Details
inetnum: 91.212.37.0 - 91.212.37.255 netname: ATSA-BG country: BG org: ORG-ATSA2-RIPE admin-c: PM523-RIPE tech-c: EK95-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: IT-ATSA mnt-routes: IT-ATSA mnt-domains: IT-ATSA created: 2009-02-06T13:33:45Z last-modified: 2016-04-14T10:56:44Z source: RIPE sponsoring-org: ORG-BTCP1-RIPE organisation: ORG-ATSA2-RIPE org-name: Air Traffic Services Authority org-type: OTHER address: Bulgaria address: 1 Brussels blvd., BG-1540 address: Sofia e-mail: plamen.markov@atsa.bg abuse-c: AR22052-RIPE mnt-ref: BT95-ADM mnt-by: BT95-ADM created: 2009-01-26T11:27:19Z last-modified: 2014-08-12T12:32:57Z source: RIPE person: Emil Kostadinov address: Air Traffic Service Authority phone: +359 2 9371963 nic-hdl: EK95-RIPE created: 2009-08-12T13:54:54Z last-modified: 2016-04-06T19:46:02Z mnt-by: RIPE-NCC-LOCKED-MNT source: RIPE person: Plamen Markov address: Air Traffic Service Authority address: Sofia Airport address: BG-1000 Sofia address: Bulgaria phone: +359 2 79324119 nic-hdl: PM523-RIPE created: 1970-01-01T00:00:00Z last-modified: 2016-04-05T15:05:59Z mnt-by: RIPE-NCC-LOCKED-MNT source: RIPE route: 91.212.37.0/24 descr: ATSA-BG origin: AS48746 mnt-lower: BT95-ADM mnt-routes: BT95-ADM mnt-by: BT95-ADM created: 2009-07-17T10:59:43Z last-modified: 2009-07-17T10:59:43Z source: RIPE
IP Addresses in this range
Details
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.