AS53900 OrbiMed Advisors, LLC

ORBIMED - OrbiMed Advisors, LLC · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#15,890largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#68,338of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS53900 in ASN lookup Look up an IP in this network (38.121.137.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

38.121.137.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS53882#15887 COMMUNITECT - Communitect, Inc256

AS53888#15888 RPA-ASN - RUBIN POSTAER AND ASSOCIATES256

AS53899#15889 SERVICEHUB - ServiceHub Corporation256

AS53915#15891 SEI - SECURITY EQUIPMENT INC256

AS53918#15892 HHRL-ASN - Host Hotels and Resorts, L.P.256

AS53925#15893 CBWE-COMM-IMDCPHX1 - CBWE Communications, LLC256

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