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Data as of Nov 5, 2026

205.240.5.0/24

No anonymizer space · no proxy exits in 30 days

Computer Systems Design Company · reallocated from Cogent Communications, LLC

Announcement
205.240.0.0/20
No RPKI
Announced by
AS3364
Type
Business
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
205.240.0.0/13AS174Internet provider34
3 always on
Cogent Communications, LLC

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
205.240.0.0/13524,288COGENT-205-240-0Cogent Communications, LLC (COGC) · USDirect AllocationApr 24, 1995abuse@cogentco.com
└ 205.240.0.0/204,096SPRINT-CDF00FComputer Systems Design Company (CSD) · USReallocatedApr 25, 1995john.nebel@csd.net

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 205.240.0.0/20

Prefix
205.240.0.0/20
Announced by
AS3364 Computer Systems Design Company
Type
Business
RPKI
No RPKI
Netname
SPRINT-CDF00F
Registrant
Computer Systems Design Company
RIR
ARIN
IPv4 market

Holder

Holder in the market →
Organization
Cogent Communications, LLC
Handle
COGC
Range
205.240.0.0/13
Registration type
Direct Allocation
Record created
Apr 24, 1995
Legacy
yes
Reallocated to
Computer Systems Design Company (CSD)
Reallocated range
205.240.0.0/20
Reallocated
Apr 25, 1995
Origin network

AS3364

US
Name
Computer Systems Design Company
Type
Business
Registered
Dec 30, 1993
Domain
csdco.com
Industry
Other
Spamhaus ASN-DROP
not listed