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AS10381 — SWCP-AS

AS10381 announces 10 IPv4 prefixes covering 22,016 addresses and 1 IPv6 prefixes.

About this network

SWCP-AS belongs to Southwest Cyberport, an independent Albuquerque, New Mexico internet company that has been trading since 1994 and now sells access, web hosting, virtual servers, colocation and email alongside old-school IT support.

What it's used for

RIS observes 10 IPv4 prefixes carrying 22,016 addresses plus a single IPv6 /32 (2001:1800::/32). The v4 side is a museum of a long-lived regional ISP: a /19 at 216.184.0.0, three /20s at 64.42.128.0, 64.42.160.0 and 69.49.160.0, then a scattering of /24s picked up over the years.

The sampled reverse DNS is what makes the role legible. Some names are the operator's own infrastructure (tc1-104.swcp.com is a terminal-concentrator name left over from dial-up; 216.184.16.5.unused.swcp.com is literally unassigned inventory). Others are customer names living directly in SWCP space: server.americanabooks.com, Mercury.i-pi.com, wireless-gw4-e1.nmia.com. Customer-branded hosts inside the ISP's own blocks mean hosted and colocated servers, not subscriber CPE.

Notable

Two observed BGP neighbours rules out any transit role. This is a small multi-homed regional provider, not a carrier. The mix of hosting rDNS and access-era infrastructure names is typical of the surviving 1990s independents: the dial-up business evaporated, and what kept the lights on was hosting, colocation and business connectivity for local customers who wanted a phone number that a human answers.

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

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