AS393689 National Library of Medicine

NLM-NCCS - National Library of Medicine · registered in the United States

IPv4 addresses2,3044 prefixes · <0.001% of announced IPv4

Rank in United States#5,841largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#20,800of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS393689 in ASN lookup Look up an IP in this network (165.112.6.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

165.112.6.0/23
165.112.8.0/22
165.112.34.0/23
165.112.140.0/24

IPv6 prefixes

All 1 prefix.

2607:f220:41f::/48

Other ASNs named National Library of Medicine

1 other network uses the same organisation name; together with AS393689 they announce 67,840 IPv4 addresses.

ASNNameIPv4 addresses

AS70NLM-GW - National Library of Medicine US65,536

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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