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	Prefix	Description
	8.11.200.0/24	Level 3 Parent, LLC
	50.149.85.0/24	Comcast Cable Communications, LLC
	50.172.163.0/24	NBCU
	50.175.130.0/24	Comcast Cable Communications, LLC
	50.200.194.0/24	Comcast Cable Communications, LLC
	50.207.32.0/21	Comcast Cable Communications, LLC
	50.218.3.0/24	Comcast Cable Communications, LLC
	50.218.20.0/24	Comcast Cable Communications, LLC
	50.218.36.0/24	Comcast Cable Communications, LLC
	50.220.223.0/24	Comcast Cable Communications, LLC
	50.221.27.0/24	Comcast Cable Communications, LLC
	50.221.162.0/23	Comcast Cable Communications, LLC
	50.225.179.0/24	Comcast Cable Communications, LLC
	50.227.232.0/24	Comcast Cable Communications, LLC
	50.228.144.0/20	Comcast Cable Communications, LLC
	50.229.129.0/24	Comcast Cable Communications, LLC
	50.230.144.0/20	Comcast Cable Communications, LLC
	70.39.44.0/24	NBCUniversal
	70.39.45.0/24	NBCUniversal
	70.39.46.0/24	NBCUniversal
	70.39.47.0/24	NBCUniversal
	70.39.58.0/24	NBCUniversal
	70.39.59.0/24	NBCUniversal
	173.213.208.0/24	NBCUniversal
	192.251.69.0/24	NBCUniversal
	204.237.248.0/23	NBC Universal
	209.23.192.0/22	Comcast Cable Communications, LLC
	209.116.149.0/24	NBC UNIVERSAL MEDIA LLC
	216.4.176.0/23	NBCUniversal
	216.4.176.0/22	NBCUniversal
	216.4.178.0/23	NBCUniversal
	216.178.96.0/21	NBCUniversal
	216.178.104.0/21	NBCUniversal

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3257	GTT Communications Inc.	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS33661	Comcast Cable Communications, LLC	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS701	Verizon Business	✔	✘
	AS17060	NBCUniversal	✔	✘
	AS7922	Comcast Cable Communications, LLC	✔	✘
	AS33287	Comcast Cable Communications, LLC	✔	✘
	AS394437	PS Lightwave	✔	✘
	AS20214	Comcast Cable Communications, LLC	✔	✘
	AS33651	Comcast Cable Communications, LLC	✔	✘
	AS33662	Comcast Cable Communications, LLC	✔	✘
	AS33657	Comcast Cable Communications, LLC	✔	✘
	AS33491	Comcast Cable Communications, LLC	✔	✘
	AS33659	Comcast Cable Communications, LLC	✔	✘
	AS54004	Cablevision Lightpath LLC	✔	✘
	AS33667	Comcast Cable Communications, LLC	✔	✘
	AS7015	Comcast Cable Communications, LLC	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS3257	GTT Communications Inc.	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS33661	Comcast Cable Communications, LLC	✔	✘
	AS701	Verizon Business	✔	✘
	AS17060	NBCUniversal	✔	✘
	AS7922	Comcast Cable Communications, LLC	✔	✘
	AS33287	Comcast Cable Communications, LLC	✔	✘
	AS20214	Comcast Cable Communications, LLC	✔	✘
	AS394437	PS Lightwave	✔	✘
	AS33651	Comcast Cable Communications, LLC	✔	✘
	AS33662	Comcast Cable Communications, LLC	✔	✘
	AS33657	Comcast Cable Communications, LLC	✔	✘
	AS33491	Comcast Cable Communications, LLC	✔	✘
	AS54004	Cablevision Lightpath LLC	✔	✘
	AS33659	Comcast Cable Communications, LLC	✔	✘
	AS7015	Comcast Cable Communications, LLC	✔	✘
	AS33667	Comcast Cable Communications, LLC	✔	✘
	AS8928	GTT Communications Inc.	✔	✘
	AS271253	LINK BRASIL TELECOMUNICACOES LTDA	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS17060	NBCUniversal	✔	✘

ASHandle:       AS17035
OrgID:          NBCUN-5
ASName:         NBCUNI-17035
ASNumber:       17035
RegDate:        2000-07-17
Updated:        2019-11-06
TechHandle:     NBCUT-ARIN
Source:         ARIN



OrgID:          NBCUN-5
OrgName:        NBCUniversal
CanAllocate:    
Street:         30 ROCKEFELLER CENTER
City:           NEW YORK
State/Prov:     NY
Country:        US
PostalCode:     10112
RegDate:        2006-12-11
Updated:        2025-01-21
OrgAdminHandle: NBCUA-ARIN
OrgTechHandle:  NBCUT-ARIN
OrgAbuseHandle: INFOS6-ARIN
OrgNOCHandle:   NBCUO-ARIN
Source:         ARIN





OrgAdminHandle:       NBCUA-ARIN
OrgAdminName:          NBCU Admin
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        NBCUT-ARIN
OrgTechName:           NBCU Technical
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       INFOS6-ARIN
OrgAbuseName:          InfoSec
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         NBCUO-ARIN
OrgNOCName:            NBCUO-ARIN
# Email removed, Log into bgp.tools to see whois emails


TechHandle:           NBCUT-ARIN
TechName:              NBCU Technical
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-05-07T03:37:54Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-gttcust6	90663
NTTCOM	as-pslightwave	1004
NTTCOM	as394437:as-testing	974
RIPE	as8220:as-coltuk	745
LEVEL3	as-lumen-customers-asns	10695
RADB	as-ccf	1529
RADB	as-comcast-ibone	27861
RADB	as-ccf-test	1461
RIPE	as-gttcust	91226
RIPE	as-mfnx	75378
RADB	as-comcast-edia	2766
ARIN	as6128:as-customers	780
NTTCOM	as394437:as-pslightwave-l3	977