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	Prefix	Description
	50.226.98.0/24	Comcast Cable Communications, LLC
	170.76.195.0/24	NSF International

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS33668	Comcast Cable Communications, LLC	✔	✘
	AS30517	Great Lakes Comnet, Inc.	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS33668	Comcast Cable Communications, LLC	✔	✘
	AS30517	Great Lakes Comnet, Inc.	✔	✘
	AS7922	Comcast Cable Communications, LLC	✔	✘

ASHandle:       AS396224
OrgID:          NSFIN
ASName:         NSF-INTERNATIONAL
ASNumber:       396224
RegDate:        2017-04-07
Comment:        www.nsf.org
Updated:        2017-04-07
Source:         ARIN



OrgID:          NSFIN
OrgName:        NSF International
CanAllocate:    
Street:         789 Dixboro Road
City:           Ann Arbor
State/Prov:     MI
Country:        US
PostalCode:     48105
RegDate:        2006-11-15
Updated:        2026-05-01
OrgAdminHandle: ADMIN9341-ARIN
OrgTechHandle:  ADMIN9341-ARIN
OrgAbuseHandle: ADMIN9341-ARIN
Source:         ARIN





OrgAdminHandle:       ADMIN9341-ARIN
OrgAdminName:          Adminstrator
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        ADMIN9341-ARIN
OrgTechName:           Adminstrator
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       ADMIN9341-ARIN
OrgAbuseName:          Adminstrator
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-06-10T03:36:04Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-30517-associated	247
RADB	as-comcast-edia	2774