ASN AS4373 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS4373?

AS4373 is listed under OCLC, Inc..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS4373 OCLC, Inc. | IPGeolocation.io

ASN Lookup Tool

OCLC, Inc. oclc.org

US 19 Routes

AS Data

AS4373

AS4373 – OCLC, Inc.

AS Number	4373
AS Name	OCLC-AS
Organization	OCLC, Inc. (oclc-1)
Country	US
Website	oclc.org
Number of IPv4 Routes	19
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1995-02-08

ASN Intelligence API for production workflows

Use ASN data for AS4373 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.137.191.0/24	AS4373	Online Computer Library Center	OCLC, Inc.	256
113.29.23.0/24	AS4373	OCLC, Inc.	OCLC Online Computer Library Center, Inc.	256
199.164.217.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
206.107.40.0/21	AS4373	OCLC, Inc.	Oclc	2048
205.160.168.0/23	AS4373	OCLC, Inc.	Oclc	512
132.174.0.0/16	AS4373	OCLC, Inc.	OCLC, Inc.	65536
132.174.181.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
193.240.184.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
198.137.189.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
192.156.252.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
38.117.94.0/24	AS4373	OCLC, Inc.	NTT America	256
204.152.104.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
198.137.190.0/24	AS4373	Online Computer Library Center	OCLC, Inc.	256
192.188.124.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
154.59.124.0/23	AS4373	OCLC, Inc.	NTT America	512
198.187.191.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
132.174.182.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
204.17.227.0/24	AS4373	OCLC, Inc.	OCLC, Inc.	256
204.152.100.0/22	AS4373	OCLC, Inc.	OCLC, Inc.	1024

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       4373
ASName:         OCLC-AS
ASHandle:       AS4373
RegDate:        1995-02-08
Updated:        1995-02-08
Ref:            https://rdap.arin.net/registry/autnum/4373


OrgName:        Online Computer Library Center
OrgId:          OCLC-1
Address:        6565 Frantz Rd
City:           Dublin
StateProv:      OH
PostalCode:     43017
Country:        US
RegDate:        1995-02-08
Updated:        2011-09-24
Ref:            https://rdap.arin.net/registry/entity/OCLC-1


OrgAbuseHandle: ANS-NOC-ARIN
OrgAbuseName:   ANS CORE Systems Inc
OrgAbusePhone:  +1-800-456-6300 
OrgAbuseEmail:  noc@ans.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ANS-NOC-ARIN

OrgTechHandle: ANS-NOC-ARIN
OrgTechName:   ANS CORE Systems Inc
OrgTechPhone:  +1-800-456-6300 
OrgTechEmail:  noc@ans.net
OrgTechRef:    https://rdap.arin.net/registry/entity/ANS-NOC-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "4373",
    "as_handle" : "AS4373",
    "as_name" : "OCLC-AS",
    "tech_contacts" : [ "ANS-NOC-ARIN" ],
    "abuse_contacts" : [ "ANS-NOC-ARIN" ],
    "date_created" : "1995-02-08",
    "date_updated" : "1995-02-08",
    "source" : "https://rdap.arin.net/registry/autnum/4373"
  } ],
  "organization" : {
    "handle" : "OCLC-1",
    "name" : "Online Computer Library Center",
    "address" : [ "6565 Frantz Rd", "Dublin", "OH", "43017", "US" ],
    "street" : "Frantz Rd",
    "city" : "Dublin",
    "state" : "OH",
    "zip_code" : "43017",
    "country" : [ "US" ],
    "date_created" : "1995-02-08",
    "date_updated" : "2011-09-24",
    "source" : "https://rdap.arin.net/registry/entity/OCLC-1",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "ANS-NOC-ARIN",
    "name" : "ANS CORE Systems Inc",
    "email" : [ "noc@ans.net" ],
    "phone" : [ "+1-800-456-6300" ],
    "source" : "https://rdap.arin.net/registry/entity/ANS-NOC-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ANS-NOC-ARIN",
    "name" : "ANS CORE Systems Inc",
    "email" : [ "noc@ans.net" ],
    "phone" : [ "+1-800-456-6300" ],
    "source" : "https://rdap.arin.net/registry/entity/ANS-NOC-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS4922	Shenandoah Cable Television LLC	US
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS4922	Shenandoah Cable Television LLC	US
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US