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	Prefix	Description
	152.51.56.0/24	GlaxoSmithKline

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS10753	Level 3 Parent, LLC	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS10753	Level 3 Parent, LLC	✔	✘

ASHandle:       AS2539
OrgID:          SBC-92
ASName:         GLAXOSMITHKLINE
ASNumber:       2539
RegDate:        1993-03-05
Updated:        2007-06-08
Source:         ARIN



OrgID:          SBC-92
OrgName:        GlaxoSmithKline
CanAllocate:    
Street:         5 Crescent Drive
City:           Philadelphia
State/Prov:     PA
Country:        US
PostalCode:     19112
RegDate:        2007-03-13
Updated:        2021-02-10
OrgAdminHandle: GSKAD-ARIN
OrgTechHandle:  GSKTE-ARIN
OrgAbuseHandle: GSKCS-ARIN
Source:         ARIN





OrgAdminHandle:       GSKAD-ARIN
OrgAdminName:          GSK-ADMIN
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        GSKTE-ARIN
OrgTechName:           GSK-TECH
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       GSKCS-ARIN
OrgAbuseName:          GSK-CSIR
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-09T03:27:21Z UTC

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Member of the following AS-SETs

-	Member	ASN Count