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Data as of Nov 5, 2026

173.211.80.0/21

768 anonymizer addresses · 38%

Cox Communications Inc. · space held by Colocation America Corporation

Announcement
this exact prefix
No RPKI
Announced by
AS22773
Type
Hosting
38% of it
IPv4 market

Path

1 · Holder
Colocation America Corporation
record created Oct 5, 2009 · reallocated to Internet Utilities NA LLC Jan 7, 2025
2 · Leased from
IPXO
for its owner Colocation America Corporation
3 · Announced by
AS22773 Cox Communications Inc.
since Jun 2022 · 4.4 yr ago
4 · Use
Proxy providersnamed Kookeey
Hosting

Operators, sellers and brokers

Proxy providers

NameParentIn 173.211.80.0/21/24s
Kookeey
25613%
1
Leased from

IP brokers

NameIn 173.211.80.0/21/24s
IPXO
76838%
3
Leased from

Owners leasing their own space

NameIn 173.211.80.0/21/24s
Colocation America Corporation
76838%
3

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

173.211.80.0/21

From the registry to its use

  1. Oct 5, 2009
    Registry record
    Colocation America Corporation
    Direct Allocation
    173.211.0.0/17
  2. May 15, 2010– Apr 15, 2011
    Announced
    AS4436 GTT Americas, LLC
    as part of 173.211.0.0/17
    173.211.0.0/17
  3. Aug 1, 2011– today
    Announced
    AS21769 Colocation America Corporation
    as part of 173.211.0.0/17
    173.211.0.0/17
  4. Sep 27, 2017– Nov 13, 2017
    Announced
    AS56934 Zhemoedov Sergey Mihaylovich
    Hosting
  5. Nov 2, 2017– Nov 13, 2017
    Announced
    AS46261 QuickPacket, LLC
    Hosting
  6. Nov 28, 2019– Dec 9, 2019
    Announced
    AS46261 QuickPacket, LLC
    Hosting
  7. Dec 3, 2019
    Route object
    AS9009 M247 Europe SRL
    RADB route object for AS9009 M247 Europe SRL, maintainer MAINT-AS9009
    173.211.80.0/22
  8. Dec 3, 2019
    Route object
    AS9009 M247 Europe SRL
    RADB route object for AS9009 M247 Europe SRL, maintainer MAINT-AS9009
    173.211.84.0/22
  9. Jul 20, 2021– Jul 31, 2021
    Announced
    AS61317 Hivelocity LLC
    Hosting
  10. Sep 18, 2021– Mar 28, 2022
    Announced
    AS22773 Cox Communications Inc.
    Internet provider
  11. Jun 9, 2022– today
    Announced
    AS22773 Cox Communications Inc.
    Internet provider
  12. Jan 7, 2025
    Reallocated
    Internet Utilities NA LLC
    Reallocated
    173.211.80.0/21
  13. Jan 7, 2025
    Route object
    IPXO
    ARIN route object for AS49999 Hydra Communications Ltd, maintainer MNT-DCL-577
    173.211.84.0/22
  14. Jan 29, 2025
    Route object
    IPXO
    RADB route object for AS51082 Spuze LLC, maintainer MAINT-AS834
    173.211.87.0/24
  15. Jan 29, 2025
    Route object
    AS51082 Spuze LLC
    ARIN route object for AS51082 Spuze LLC, maintainer MNT-CAC-89
    173.211.87.0/24
  16. today
    Leased from
    IPXO
    IP broker
  17. today
    Used
    Kookeey
    Proxy seller

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesOperatorLeased fromHolderRPKI
173.211.0.0/17
since Aug 2011
AS21769Hosting7,16822%Datacenter proxyProxy providersoperated by OxylabsIP broker IPXO (part)Colocation America Corporation
More specific

Announcements inside

PrefixOriginTypeOperatorLeased fromHolderRPKI
173.211.80.0/24
since Jun 2022
AS19437HostingIP broker IPXOColocation America Corporation
via Internet Utilities NA LLC
173.211.81.0/24
since Oct 2023
AS396356HostingIP broker IPXOColocation America Corporation
via Internet Utilities NA LLC
173.211.82.0/23
since Sep 18, 2026
AS33490ISP proxyIP broker IPXOColocation America Corporation
via Internet Utilities NA LLC
173.211.84.0/24
since Mar 2026
AS396004UnknownIP broker IPXOColocation America Corporation
via Internet Utilities NA LLC
173.211.85.0/24
since Aug 2023
AS29802Datacenter proxyProxy providersoperated by KookeeyIP broker IPXOColocation America Corporation
via Internet Utilities NA LLC
173.211.86.0/24
since Sep 2026
AS137409HostingIP broker IPXOColocation America Corporation
via Internet Utilities NA LLC

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
173.211.0.0/1732,768CAC-BLOCK7Colocation America Corporation (CAC-89) · USDirect AllocationOct 5, 2009Abuse@colocationamerica.com
└ 173.211.80.0/212,048IL-845IPXO LLC (IL-845) · USReallocatedNov 24, 2021abuse@ipxo.com
└ 173.211.80.0/212,048NETUTILSInternet Utilities NA LLC (DCL-577) · USReallocatedJan 7, 2025report@abuseradar.com
└ 173.211.81.0/24256NET-173-211-81-0-24unknownReassignedJan 7, 2025report@abuseradar.com
via IL-845
└ 173.211.82.0/23512NET-173-211-82-0-23unknownReassignedJan 7, 2025report@abuseradar.com
via IL-845
└ 173.211.84.0/24256NET-173-211-84-0-24unknownReassignedFeb 19, 2026report@abuseradar.com
via IL-845
└ 173.211.85.0/24256KOOKEEYunknownReassignedJan 7, 2025report@abuseradar.com
via IL-845
└ 173.211.86.0/24256173-211-86-0-24unknownReassignedJan 7, 2025report@abuseradar.com
via IL-845

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

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

2,048 addresses
TypeAddressesShareRanges
Hosting76838%3
ISP proxyanonymizer51225%1
Unknown51225%2
Datacenter proxyanonymizer25613%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
Colocation America Corporation
Handle
CAC-89
Range
173.211.0.0/17
Registration type
Direct Allocation
Record created
Oct 5, 2009
Reallocated to
Internet Utilities NA LLC (DCL-577)
Reallocated range
173.211.80.0/21
Reallocated
Jan 7, 2025
Origin network

AS22773

US
Name
Cox Communications Inc.
Type
Internet provider
Registered
Nov 20, 2001
Domain
cox.com
Website
www.cox.com/peering
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed