AS21645 — ADA-CHICAGO

AS21645 announces 1 IPv4 prefixes covering 256 addresses and 0 IPv6 prefixes.

About this network

The AS handle ADA-CHICAGO is held by the American Dental Association.

What it's used for

• The address space carries corporate infrastructure for a professional association, evidenced by the netname ADA-4 and registrant American Dental Association.
• The inventory consists of 256 IPv4 addresses within a single /24 prefix (64.145.66.0/24) and 0 IPv6 prefixes. With only 2 observed neighbours, the low address-to-neighbour ratio indicates a small, self-contained internal network rather than a transit or large-scale access provider.

Notable

• The RDAP registrant American Dental Association aligns perfectly with the AS holder name, confirming consistent ownership.
• The address inventory is minimal, comprising a single contiguous /24 block, which is typical for a non-telecom organization managing its own internal IT infrastructure.

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

Announced prefixes

• 64.145.66.0/24

Upstream networks

• AS10753 Level 3 Parent, LLC
• AS46887 Crown Castle Fiber LLC

Adjacent networks

• AS10753 Level 3 Parent, LLC
• AS46887 Crown Castle Fiber LLC

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-CCF, AS-CCF-TEST.