AS15338 — CEROBI - CEROBI LLC

AS15338 announces 1 IPv4 prefixes covering 256 addresses and 0 IPv6 prefixes.

About this network

The block is registered to a carrier, under a netname describing a much larger parent range.

What it's used for

• A company's network. A single IPv4 /24 announced from the United States, no IPv6, and one observed BGP neighbour.

Notable

• The block is registered not to the AS holder but to a communications carrier, whose corporate name carries a roman numeral marking a successor entity.
• Its netname is the registry's default form built from the parent allocation's address rather than from this block, so the label names a range far larger than the route.
• The holder's own name appears only in the AS handle and the holder record, never in the block's registration.
• Three addresses were queried for reverse DNS and none returned a name.
• Two hundred and fifty-six addresses behind one upstream.

Interesting

• A netname naming the parent is how carriers register a large block once and cut customer pieces from it without updating the label. It means a lookup on this address returns information about a range that mostly has nothing to do with it.
• A roman numeral in a company name records a restructuring, where the original entity was replaced by a second one holding the same assets. The registry keeps the numeral long after anyone remembers why.
• The AS handle is the only field naming the operator, which makes it the only useful identifier here.

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

Announced prefixes

• 173.45.22.0/24

Upstream networks

• AS29838 Atlantic Metro Communications II, Inc.

Adjacent networks

• AS29838 Atlantic Metro Communications II, Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 1 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS-WINDSTREAM-CUST.