AS33633 — USG-CORPORATION

AS33633 announces 3 IPv4 prefixes covering 1,536 addresses and 0 IPv6 prefixes.

About this network

The AS handle USG-CORPORATION is held by USG Corporation, a major North American manufacturer of gypsum-based building materials.

What it's used for

• The address space carries internal corporate traffic, evidenced by the netname USGCOR-4CLASSC-CHIIL-64-43-232-0-22 and reverse DNS entries like host.skivemedia.com and mynp2.com.
• The AS announces 1536 IPv4 addresses across 3 prefixes with only 3 observed neighbours, a ratio that indicates a small, self-contained internal network rather than a transit or access provider.

Notable

• Registrants are mixed: the largest prefix is registered to USG Corporation, Inc., while 8.26.176.0/24 is registered to Level 3 Parent, LLC and 66.225.192.0/24 to DEFT.COM, suggesting leased or historically acquired space.
• The inventory consists of three distinct IPv4 blocks with no IPv6 prefixes, reflecting a legacy corporate estate that has not expanded into modern dual-stack operations.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 8.26.176.0/24
• 64.43.232.0/22
• 66.225.192.0/24

Upstream networks

• AS23352 DEFT.COM
• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC

Adjacent networks

• AS23352 DEFT.COM
• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC