asn.dev

Autonomous system

AS21565 AS21565 - Horry Telephone Cooperative, Inc.

Unclassified ARIN

IPv4 addresses 111K 155 prefixes
IPv6 prefixes 9 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Horry Telephone Cooperative

United States of America · AI-generated

cooperative residential dsl south-carolina

AS21565 is operated by Horry Telephone Cooperative, Inc., a telecommunications cooperative serving Horry County in South Carolina.

What it's used for

  • The address space carries residential and business access traffic, evidenced by reverse DNS entries such as pool-xdsl-mi.sccoast.net and net.sccoast.net.
  • The AS announces 115,968 IPv4 addresses across 125 prefixes and 9 IPv6 prefixes, while maintaining only 1 observed neighbour, indicating a local access network rather than a transit provider.

Notable

  • All sampled RDAP registrants are listed as Horry Telephone Cooperative, Inc. with the netname HTC-45, consistent with the AS holder.
  • The inventory consists of multiple /20 and /21 blocks, including ranges in 64.138.0.0/16, 66.153.0.0/16, and 152.44.0.0/16, reflecting a segmented local service area.

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

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

ASNetworkPaths seen
AS2711Spirit Communications23,546

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, 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 155 prefixes · 111K addresses IPv6 9 prefixes

CountryNamePrefixes
USUnited States of America164

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21565
Registry name
AS21565
Registrant
Horry Telephone Cooperative, Inc.
Abuse contact
arin-admin@htcinc.net
Registered
2001-05-23
Last changed
2012-03-20
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 416 valid, 0 with no ROA
ROAs
18 authorising AS21565
ASPA
no ASPA record
IRR
100% registered · 416 of 416 announcements
Route objects
37 naming AS21565

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: 442 networks and 1,779 prefixes, as published 2026-10-22. 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