asn.dev

Autonomous system

AS26405 HDCS

Unclassified ARIN

IPv4 addresses 4.35K 11 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Horizon Data Solutions

United States of America · AI-generated

hosting colocation business

The AS handle HDCS is held by Horizon Data Solutions, LLC.

What it's used for

  • The address space carries customer infrastructure, evidenced by reverse DNS entries like cust-67-211-56-128.dllstx01.corexchange.com and netnames such as ZC38-BLOCK11 and HDCS-NET1.
  • The AS announces 4352 IPv4 addresses across 11 prefixes with only 2 observed neighbours, a ratio that indicates a hosting or colocation provider rather than a transit carrier.

Notable

  • Registrants are split between Horizon Data Solutions, LLC and zColo, with zColo holding the majority of the larger blocks including 67.211.56.0/23 and 74.124.18.0/23.
  • The inventory consists of 11 IPv4 prefixes with no IPv6 announcements, showing a purely IPv4-focused estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3356Level 3 Parent, LLC552
AS13767DataBank Holdings, Ltd.240

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 11 prefixes · 4.35K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America11

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS26405
Registry name
HDCS
Registrant
HORIZON DATA SOLUTIONS, LLC
Abuse contact
licensing@vazata.com
Registered
2010-09-03
Last changed
2012-02-24
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 13 with no ROA
ROAs
0 authorising AS26405
ASPA
no ASPA record
IRR
85% registered · 11 of 13 announcements
Route objects
12 naming AS26405

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 448 networks and 1,851 prefixes, as published 2026-10-29. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check