Autonomous system
AS14148 EXLIBRIS
Unclassified ARIN
Summary
Ex Libris
business education infrastructure
The largest block belongs to the parent company, one registrant field holds a role instead of a name, and the addresses that answer do so under a third company's domain.
What it's used for
- A library software company's network. 40,704 addresses across 19 IPv4 prefixes plus four IPv6 prefixes, with nine observed BGP neighbours.
Notable
165.215.0.0/17, the largest block, carries the netnamePROQUEST-NET, registered toPROQUEST LLC.- Eight blocks carry
EXLIBRIS-NETWORK-1orEXLIBRIS-20-1, registered toEx Libris (USA) Inc. 31.186.254.0/24carriesINAP-AMS004-exlibrisusa-31-186-254-0, with the registrant recorded asAbuse Contact.64.74.237.0/24carriesINAP-CHG-EXLIBRISUSA-56957.- Two of eighteen sampled addresses returned a name:
mcfls-sra.iii.comander25-sdc.iii.com.
Interesting
- A registrant field reading
Abuse Contactrecords a role where a company should be. The record was built from whichever object the software found first, and nothing rejected it. - That same netname mixes upper and lower case, which almost nothing else in the corpus does. It was assembled by a provider's system out of a site code, a customer name and the block itself.
- The reverse names belong to a domain that is neither the registrant's nor the parent's. Library software companies have merged repeatedly, and the DNS is the slowest layer to catch up.
- Four naming conventions across nineteen blocks: the parent's, the company's own, a provider's site-coded form and a provider's ticket-numbered form. Each records who handed the space over rather than who uses it.
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.
Transit providers
9 upstream, 0 downstream and 14 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 18 prefixes · 40.96K addresses IPv6 4 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 22 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS14148- Registry name
- EXLIBRIS
- Registrant
- Ex Libris (USA) Inc
- Abuse contact
- abuse-ni@clarivate.com
- Registered
- 1999-10-27
- Last changed
- 2014-04-28
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 9% valid · 3 valid, 30 with no ROA
- ROAs
- 3 authorising AS14148
- ASPA
- no ASPA record
- IRR
- 100% registered · 33 of 33 announcements
- Route objects
- 52 naming AS14148
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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