AS23427 — GLENBARD-HSD87

AS23427 announces 1 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

GLENBARD-HSD87 is the autonomous system for Glenbard HSD #87, a public school district in Illinois.

What it's used for

• The space carries the district's internal network infrastructure, identified by the netname GLENB-3 and registrant Glenbard HSD #87.
• The AS announces a single IPv4 prefix, 204.145.108.0/22, comprising 1024 addresses, with 0 IPv6 prefixes.
• With only 1 observed neighbour, the low address-to-neighbour ratio indicates a stub or access network rather than a transit provider.

Notable

• The RDAP registrant Glenbard HSD #87 matches the AS holder name exactly, confirming direct ownership of the address space.
• The address inventory consists of a single contiguous /22 block, typical for a small-scale organizational network.

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

Announced prefixes

• 204.145.108.0/22

Upstream networks

• AS6325 Illinois Century Network

Adjacent networks

• AS6325 Illinois Century Network

Routing security

• RPKI: 0 valid, 0 invalid and 1 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 2 route objects.
• Listed in as-sets: AS-COMCAST-EDIA, AS-ICN-CUSTOMERS, AS6325:AS-ICN-K12.