AS11327 NCI-GROUP-INC

NCI-GROUP-INC is the corporate AS of NCI Group, Inc. — the legal entity behind NCI Building Systems, one of North America's largest manufacturers of metal buildings, roofing, wall systems and insulated metal panels. NCI merged with Ply Gem in 2018 and the combined group now trades as Cornerstone Building Brands, but the AS and its address space are still registered under the older NCI name.

What it's used for

An enterprise edge, and nothing more. RIS sees 2 IPv4 prefixes, 512 addresses, no IPv6, and a single observed neighbour — a stub buying transit from one upstream. Both prefixes, 205.167.42.0/24 and 205.167.43.0/24, are registered in ARIN directly to NCI Group, Inc.

Notable

The reverse DNS settles the identification without any guesswork. Sampled addresses answer under ncilp.com — NCI's own domain ("NCI, LP" being the historic partnership entity) — including gateway.ncilp.com on 205.167.42.5. That is a first-party PTR zone on first-party space, announced by the first-party AS: holder, registrant and hostname all agree.

Interesting

Two details are worth flagging for anyone geolocating this space. First, some PTRs in 205.167.43.0/24 are named for a different block (72-250-203-5.ncilp.com), a leftover naming convention from an earlier address range that survived a renumber. It is a cosmetic artifact, not evidence of anything about who uses the addresses today. Second, the corporate name on the record lags reality by several years — the brand is Cornerstone Building Brands and the head office is in Cary, North Carolina, while the address space still carries the Houston-era NCI identity. Neither changes the classification: this is a manufacturer's own network, not a service provider's.