AS36673 — VECTREN63-64-13-1

AS36673 announces 5 IPv4 prefixes covering 1,536 addresses and 0 IPv6 prefixes.

About this network

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.

Announced prefixes

• 71.155.218.0/24
• 198.17.11.0/24
• 198.51.125.0/24
• 198.51.126.0/23
• 198.51.128.0/24

Upstream networks

• AS7018 AT&T Enterprises, LLC
• AS6079 RCN

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS6079 RCN