AS13875 — -Reserved AS-

AS13875 announces 4 IPv4 prefixes covering 1,792 addresses and 0 IPv6 prefixes.

About this network

Marked reserved in one source, and not one of its blocks is registered to the company announcing them.

What it's used for

• A fibre network operator. 1,536 addresses across three IPv4 prefixes, two observed BGP neighbours, and no IPv6 announced.

Notable

• The registry holder record names the company and gives the handle AS13875-MX-FIBER.
• The inventory's AS handle field instead reads -Reserved AS-.
• 207.228.200.0/22 is registered to one company, netname UPSTART.
• The two /24s are registered to a second, both netname HUDSON.
• Neither registrant is the company the AS is held by.
• First seen in the routing archive on 2006-02-17, timestamped at midnight.

Interesting

• The reserved marker is the second instance of that contradiction in this range, which makes it a systematic gap in one source rather than a one-off. An AS actively announcing three blocks is not reserved by any reading.
• An operator whose entire announced space belongs to other companies is either carrying their traffic or has acquired the networks without updating the records. The registry cannot tell those apart, and that ambiguity is the normal state for small fibre operators that grow by absorbing each other.
• Two upstreams and no IPv6 puts the network's shape a decade behind its first-seen date.

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

Announced prefixes

• 23.144.252.0/24
• 204.235.240.0/24
• 204.235.242.0/24
• 207.228.200.0/22

Upstream networks

• AS134176 Cloudie Limited
• AS10099 China Unicom Global

Adjacent networks

• AS134176 Cloudie Limited
• AS10099 China Unicom Global