AS13482 — ZWEIG-DIMENNA

AS13482 announces 1 IPv4 prefixes covering 2,048 addresses and 0 IPv6 prefixes.

About this network

ZWEIG-BLK-A implies a block B that was planned and never registered.

What it's used for

• An investment management firm's network. 2,048 addresses in one IPv4 prefix, 216.163.160.0/21, three observed BGP neighbours, and no IPv6 announced.

Notable

• The block is netname ZWEIG-BLK-A, registered to the firm.
• The registrant string ends with a full stop after the legal form, Associates, LLC..
• Three addresses were queried for reverse DNS and none returned a name.

Interesting

• Lettering a block A is somebody expecting more of them. Whether B ever arrived is not visible from here, but the intent is: the naming scheme was designed for a series and the series stopped at one.
• A /21 is large for a firm of this kind, and it dates the request. Address space was granted on stated need in an era when nobody was counting closely, and what an organisation asked for then it still holds now.
• Three upstreams, and none of the sampled addresses answering, is a network built for outbound reliability rather than inbound service. Trading systems need the path out to stay up; nothing here needs to be found by name from outside.

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

Announced prefixes

• 216.163.160.0/21

Upstream networks

• AS174 Cogent Communications, LLC
• AS46450 Pilot Fiber, Inc.
• AS26878 Natural Wireless, LLC

Adjacent networks

• AS174 Cogent Communications, LLC
• AS46450 Pilot Fiber, Inc.
• AS26878 Natural Wireless, LLC