AS2539 GlaxoSmithKline

GLAXOSMITHKLINE - GlaxoSmithKline · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#13,660largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#62,976of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS2539 in ASN lookup Look up an IP in this network (152.51.56.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

152.51.56.0/24

Other ASNs named GlaxoSmithKline

4 other networks use the same organisation name; together with AS2539 they announce 2,816 IPv4 addresses.

ASNNameIPv4 addresses

AS3902GLAXOSMITHKLINE - GlaxoSmithKline US1,024

AS14306GLAXOSMITHKLINE - GlaxoSmithKline US768

AS824GLAXOSMITHKLINE - GlaxoSmithKline US512

AS5635GLAXOSMITHKLINE - GlaxoSmithKline US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS2020#13657 ADHESIVE-ASN - Adhesives Research, Inc.256

AS2031#13658 AWWASN - American Water Works Company Inc.256

AS2538#13659 IBM-PLP - IBM256

AS2717#13661 CUMMINS-AS1 - Cummins Inc.256

AS2723#13662 ENDURANCE - ENDURANCE REINSURANCE CORPORATION OF AMERICA256

AS2725#13663 BES-NET - Berkeley Educational Services of New Jersey, Inc.256

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources