AS4373 — OCLC-AS - Online Computer Library Center

AS4373 announces 16 IPv4 prefixes covering 72,704 addresses and 0 IPv6 prefixes.

About this network

OCLC-AS is the network of OCLC, the Online Computer Library Center — a nonprofit library cooperative based in Dublin, Ohio, best known for running the WorldCat union catalog.

What it's used for

• Delivering OCLC's library technology services to member libraries worldwide: cataloging, resource sharing, and WorldCat lookups.
• Corporate and data-centre networking for OCLC's own operations from its Dublin, Ohio campus.

Notable

• Institutional address space: an IP here belongs to a nonprofit membership organisation serving libraries, not to a residential subscriber or a commercial host renting capacity.
• The allocation is sizeable — tens of thousands of IPv4 addresses — which is a legacy of an early-1995 ARIN registration made when address space was handed out generously to established institutions.

Interesting

• OCLC sits in an unusual middle ground: not a university, not a commercial ISP, but a library-sector cooperative whose services quietly sit behind catalog lookups at thousands of academic and public libraries.

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

Announced prefixes

• 38.117.94.0/24
• 113.29.23.0/24
• 132.174.0.0/16
• 154.59.124.0/23
• 192.156.252.0/24
• 192.188.124.0/24
• 193.240.184.0/24
• 198.137.189.0/24
• 198.137.190.0/23
• 198.187.191.0/24
• 199.164.217.0/24
• 204.17.227.0/24
• 204.152.100.0/22
• 204.152.104.0/24
• 205.160.168.0/23
• 206.107.40.0/21

Upstream networks

• AS13335 Cloudflare, Inc.
• AS3356 Level 3 Parent, LLC
• AS4922 Shenandoah Cable Television LLC
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS3257 GTT Communications Inc.
• AS174 Cogent Communications, LLC

Adjacent networks

• AS13335 Cloudflare, Inc.
• AS3356 Level 3 Parent, LLC
• AS4922 Shenandoah Cable Television LLC
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 19 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 39 route objects.
• Listed in as-sets: AS-EQUINIX-AP, AS-EQUINIX-ME, AS-EQUINIX-SY, AS-GTTCUST, AS-JANETEURO, AS-JANETPLUS, AS-JANETUS, AS-KDDCUSTOMER2, AS-NWN-TRANSIT, AS-SHENTEL, AS-TELSTRA-INTL-CUSTOMERS, AS-XO, AS-XO-B, AS13335:AS-CUSTOMERS, AS7606:AS-SA-IX.