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Data as of Nov 8, 2026

209.172.204.0/23

No anonymizer space · no proxy exits in 30 days

CyrusOne LLC

Announcement
209.172.204.0/22
No RPKI
Announced by
AS62
Type
Hosting

Announcements

Less specific

Covering announcements

PrefixOriginTypeHolderRPKI
209.172.192.0/19
since Dec 2016
AS62HostingCyrusOne LLC
More specific

Announcements inside

PrefixOriginTypeHolderRPKI
209.172.204.0/24
since Oct 2016
AS62HostingCyrusOne LLC

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
209.172.192.0/198,192GRAMTEL002CyrusOne LLC (CL-260) · USDirect AllocationNov 20, 1997abuse@cyrusone.com
└ 209.172.204.0/24256CYRUSONE--C0000209-209-172-204-0-24Files Anywhere Inc (C06379962) · USReassignedMar 10, 2017abuse@cyrusone.com
via GRAMTEL002
└ 209.172.205.48/2816CYRUSONE--C0000080-209-172-205-48-28unknown———
└ 209.172.205.64/2816CYRUSONE--C0000686-209-172-205-64-28unknown———
└ 209.172.205.128/25128CYRUSONE--C0000092-209-172-205-128-25unknown———

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 209.172.204.0/22

Prefix
209.172.204.0/22
Announced by
AS62 CyrusOne LLC
Type
Hosting
RPKI
No RPKI
Netname
GRAMTEL002
Registrant
CyrusOne LLC
RIR
ARIN
Origin network

AS62

US
Name
CyrusOne LLC
Type
Hosting
Registered
Sep 28, 2012
Domain
cyrusone.com
Website
www.cyrusone.com
Spamhaus ASN-DROP
not listed