AS15008 — AISG

AS15008 announces 4 IPv4 prefixes covering 3,840 addresses and 0 IPv6 prefixes.

About this network

Four blocks that rebuild one parent, with a single hole left in it.

What it's used for

• A company network. Four IPv4 blocks announced from the United States, no IPv6, and three observed BGP neighbours.

Notable

• The four prefixes are a /21, a /22, a /23 and a /24, all cut from the same contiguous parent and together covering all of it except one /24.
• All four carry the identical netname AISG, and all four are registered to AISG; AISG NetOPs — the organisation and an operations role account joined into one field by a semicolon.
• The AS handle is AISG as well, so handle, netname and holder name are the same four letters.
• The routing history begins in 2012.
• Twelve addresses were queried for reverse DNS and none returned a name.

Interesting

• A set of prefixes that halves its way down like this is what a router emits when it is told to advertise a range that is not a power of two. The missing piece is the interesting part: the operator holds a contiguous parent, announces almost all of it, and leaves one /24 out. That gap is either delegated somewhere else or simply not in service.
• The registrant field is doing two jobs at once. A role account belongs in the technical contact rather than beside the organisation name, so the semicolon leaks how the record was filed.
• The name never expands. Nothing in the record says what the letters stand for, which makes the AS number the only reliable way to find this holder again.

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

Announced prefixes

• 216.238.16.0/22
• 216.238.20.0/23
• 216.238.23.0/24
• 216.238.24.0/21

Upstream networks

• AS6939 Hurricane Electric LLC
• AS174 Cogent Communications, LLC

Downstream networks

• AS400507 Charger Access, LLC

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS400507 Charger Access, LLC
• AS174 Cogent Communications, LLC

Internet exchanges

• Digital Realty Atlanta Internet Exchange — Atlanta, United States