asn.dev

Autonomous system

AS36673 VECTREN63-64-13-1

Unclassified ARIN

IPv4 addresses 1.54K 5 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

Vectren Utility Holdings

United States of America · AI-generated

utility corporate infrastructure business

VECTREN63-64-13-1 is operated by Vectren Utility Holdings, Inc.

What it's used for

  • The address space carries internal corporate and utility infrastructure, evidenced by netnames NETBLK-SIGECO, SIGECO, SIGECO-1, and SIGECO-4 associated with Southern Indiana Gas & Electric Company.
  • The AS announces 1536 IPv4 addresses across 5 prefixes with only 2 observed neighbours, indicating a small, isolated internal network rather than a transit or access provider.

Notable

  • Registrants are consistent with the announcer, listing Vectren Utility Holdings, Inc. and Southern Indiana Gas & Electric Company, with one prefix (71.155.218.0/24) registered to AT&T Enterprises, LLC under netname SBCIS-SIS80.
  • The address inventory is finely subdivided into small /24 and /23 blocks, reflecting site-by-site segmentation typical of a large corporate utility 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
AS7018AT&T Enterprises, LLC252
AS6079RCN108

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 5 prefixes · 1.54K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America5

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS36673
Registry name
VECTREN63-64-13-1
Registrant
Vectren Utility Holdings, Inc.
Abuse contact
wanteam@centerpointenergy.com
Registered
2006-03-15
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 6 with no ROA
ROAs
0 authorising AS36673
ASPA
no ASPA record
IRR
100% registered · 6 of 6 announcements
Route objects
6 naming AS36673

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