AS31816 National Marrow Donor Program

NMDP - National Marrow Donor Program · registered in the United States

IPv4 addresses7683 prefixes · <0.001% of announced IPv4

Rank in United States#9,600largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#44,172of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS31816 in ASN lookup Look up an IP in this network (192.112.34.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

192.112.34.0/24
192.149.74.0/24
198.175.249.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS30677#9597 VALLEY-HEALTH-SYSTEM - Valley Health System768

AS31759#9598 LARABIDA - La Rabida Hospital768

AS31776#9599 BUSINESS-WIRE-NY - Business Wire768

AS31824#9601 HF-MANAGEMENT-SERVICES-LLC - HF Management Services, LLC768

AS32008#9602 PAYCHEX-L - Paychex Inc.768

AS32032#9603 ORGILL-AS - Orgill, Inc.768

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