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Data as of Nov 6, 2026

204.181.159.0/24

No anonymizer space · no proxy exits in 30 days

Computer Systems Design Company · space held by Cogent Communications, LLC

Announcement
204.181.152.0/21
No RPKI
Announced by
AS3364
Type
Business
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeHolderRPKI
204.180.0.0/14
since May 2024
AS174Internet providerCogent Communications, LLC

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
204.180.0.0/14262,144COGENT-204-180-0Cogent Communications, LLC (COGC) · USDirect AllocationOct 18, 1994abuse@cogentco.com
└ 204.181.152.0/212,048SPRINT-CCB59FComputer Systems Design Company (CSD) · USReassignedDec 20, 1994john.nebel@csd.net

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 204.181.152.0/21

Prefix
204.181.152.0/21
Announced by
AS3364 Computer Systems Design Company
Type
Business
RPKI
No RPKI
Netname
SPRINT-CCB59F
Registrant
Computer Systems Design Company
RIR
ARIN
IPv4 market

Holder

Holder in the market →
Organization
Cogent Communications, LLC
Handle
COGC
Range
204.180.0.0/14
Registration type
Direct Allocation
Record created
Oct 18, 1994
Legacy
yes
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