Data as of Nov 6, 2026

154.17.255.0/24

Anonymizer · ISP proxy

Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
record created Feb 5, 1992
2 · Leased from
not leased
3 · Announced by
AS174 Cogent Communications, LLC
since Jun 2021 · 5.4 yr ago
4 · Use
Proxy providersnamed High Proxies
ISP proxy

Operators, sellers and brokers

Proxy providers

NameParentIn 154.17.255.0/24/24s
High Proxies
256100%
1

Lineage

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

154.17.255.0/24

From the registry to its use

  1. Feb 5, 1992
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    154.17.0.0/16
  2. May 9, 2005– Jun 15, 2006
    Announced
    AS174 Cogent Communications, LLC
    as part of 154.17.0.0/16
    154.17.0.0/16
  3. Jun 22, 2006– Sep 15, 2007
    Announced
    AS1280 Internet Systems Consortium, Inc.
    as part of 154.17.0.0/16
    154.17.0.0/16
  4. Sep 22, 2007– Dec 1, 2007
    Announced
    AS3557 Internet Systems Consortium, Inc.
    as part of 154.17.0.0/16
    154.17.0.0/16
  5. Dec 8, 2007– Dec 2, 2018
    Announced
    AS1280 Internet Systems Consortium, Inc.
    as part of 154.17.0.0/16
    154.17.0.0/16
  6. Nov 4, 2019– Dec 27, 2020
    Announced
    AS174 Cogent Communications, LLC
    Internet provider
  7. Oct 5, 2020– today
    Announced
    AS174 Cogent Communications, LLC
    as part of 154.17.0.0/16
    154.17.0.0/16
  8. Jun 14, 2021– today
    Announced
    AS174 Cogent Communications, LLC
    Internet provider
  9. today
    Used
    High Proxies
    Proxy seller

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesLeased fromProxy exitsHolderRPKI
154.17.0.0/16
since Oct 2020
AS174Internet provider2,5603.9%ISP proxyIP broker Aventice (part)80
11 always on
Cogent Communications, LLC

Network & registry

Origin network

AS174

US
Name
Cogent Communications, LLC
Type
Internet provider
Registered
May 16, 1996
Domain
cogentco.com
Website
www.cogentco.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
1,658