asn.dev

Autonomous system

AS12133 LISCO

Unclassified ARIN

IPv4 addresses 20.48K 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 1 downstream
Flagged prefixes 0 none

Summary

LISCO

United States · AI-generated

isp residential legacy

LISCO, the Local Internet Service Company, is a regional internet provider based in Fairfield, Iowa.

What it's used for

  • Residential and business internet access. Sampled addresses answer as 69-18-47-254.lisco.net, per-address subscriber names.

Notable

  • Two prefixes and nothing else: 69.18.0.0/18 and 76.76.224.0/20, registered as LSO-BLK-1 and LSO-BLK-2. 20,000 addresses total, against four observed BGP neighbours.
  • Both blocks are held by LISCO directly rather than assigned by an upstream, which for a provider this small means it went to the registry for its own space and can change carriers without renumbering anyone.
  • No IPv6 announced.

Interesting

  • The name is a plain description rather than a brand — the Local Internet Service Company, serving a town. That naming convention dates from a period when being the local ISP was a category rather than a market position, and there was no need to distinguish yourself from competitors who had not arrived yet.

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, 1 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS174Cogent Communications, LLC91
AS3257GTT Communications Inc.25

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, 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 2 prefixes · 20.48K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS12133
Registry name
LISCO
Registrant
Local Internet Service Company
Abuse contact
abuse@lisco.com
Registered
1999-03-31
Last changed
2012-02-24
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS12133
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
4 naming AS12133

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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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