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	Prefix	Description
	128.59.0.0/16	Columbia University
	129.236.0.0/16	Lamont-Doherty Earth Observatory of Columbia University
	160.39.0.0/16	Columbia University
	192.5.43.0/24	Columbia University
	192.12.82.0/24	Columbia University
	207.10.136.0/21	Lamont-Doherty Earth Observatory of Columbia University
	209.2.47.0/24	Nysernet/Columbia University
	209.2.48.0/22	Nysernet/Columbia University
	209.2.185.0/24	Columbia University
	209.2.208.0/20	Lamont-Doherty Earth Observatory of Columbia University
	209.2.224.0/20	Lamont-Doherty Earth Observatory of Columbia University
	2001:18d8::/32	Columbia University

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✔
	AS3754	NYSERNet	✔	✔
	AS3630	NYSERNet	✔	✔
	AS1239	Sprint Wireline (Cogent)	✔	✔

ASHandle:       AS14
OrgID:          COLUMB
ASName:         COLUMBIA-GW
ASNumber:       14
RegDate:        1970-01-01
Updated:        2010-06-28
Source:         ARIN



OrgID:          COLUMB
OrgName:        Columbia University
CanAllocate:    
Street:         612 W 115TH ST
City:           NEW YORK
State/Prov:     NY
Country:        US
PostalCode:     10025
RegDate:        1970-01-01
Updated:        2017-01-28
OrgAdminHandle: CU-NOC-ARIN
OrgTechHandle:  CU-NOC-ARIN
OrgAbuseHandle: CUAC-ARIN
Source:         ARIN





OrgAdminHandle:       CU-NOC-ARIN
OrgAdminName:          Columbia University Computer Operations
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CU-NOC-ARIN
OrgTechName:           Columbia University Computer Operations
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       CUAC-ARIN
OrgAbuseName:          COLUMBIA UNIVERSITY ABUSE CONTACT
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-12-24T03:27:30Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as3630:as-connectors	72
RIPE	as-level3-ipv6	22077
LEVEL3	as-sprint-origins	7309
RADB	as3754:as-connectors	73
RADB	as-nysr-de	34
LEVEL3	as-level3-origins-na	0
LEVEL3	as-as209-cust	1818