AS23357 — -Reserved AS-

AS23357 announces 6 IPv4 prefixes covering 1,792 addresses and 0 IPv6 prefixes.

About this network

The AS handle is -Reserved AS- and the holder is CyberXpress, Inc.

What it's used for

• The address space is registered under netnames TWTC-CYX7, TWTC-CYX2, TWTC-CYX4, TWTC-CYX5, and TWTC-CYX6, all attributed to CyberXpress, Inc.
• The AS announces 1792 IPv4 addresses across 6 prefixes with 1 observed neighbour, a ratio consistent with a small, isolated business network rather than a transit or large access provider.

Notable

• All six announced prefixes list CyberXpress, Inc. as the registrant, matching the AS holder identity.
• The inventory consists of a single /23 block and five /24 blocks, indicating a modest, fragmented address allocation.
• The AS was first seen in routing tables in 2002, suggesting a long-standing but small-scale presence.

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

Announced prefixes

• 209.12.56.0/24
• 209.136.4.0/24
• 209.136.38.0/24
• 209.194.116.0/24
• 216.84.198.0/23
• 216.253.163.0/24

Upstream networks

• AS17378 TierPoint, LLC

Adjacent networks

• AS17378 TierPoint, LLC