Autonomous system
AS21645 ADA-CHICAGO
Unclassified ARIN
Summary
American Dental Association
business professional association corporate
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-4and registrantAmerican 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 Associationaligns 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21645- Registry name
- ADA-CHICAGO
- Registrant
- American Dental Association
- Abuse contact
- ovallef@ada.org
- Registered
- 2020-02-19
- Last changed
- 2020-02-19
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS21645
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 2 naming AS21645
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,771 prefixes, as published 2026-10-15. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere