AS3999 The Pennsylvania State University

PENN-STATE - The Pennsylvania State University · registered in the United States

IPv4 addresses443,90411 prefixes · 0.014% of announced IPv4

Rank in United States#179largest network in US by IPv4 space, of 18,338 · 0.03% of US

Rank worldwide#629of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS3999 in ASN lookup Look up an IP in this network (66.71.0.1) All networks in United States

IPv4 prefixes

All 11 prefixes, in address order.

66.71.0.0/17
75.102.64.0/18
104.38.0.0/15
128.118.0.0/16
130.203.0.0/16
146.186.0.0/16
150.231.0.0/16
192.5.157.0/24
192.5.158.0/23
192.5.160.0/23
192.112.253.0/24

IPv6 prefixes

All 1 prefix.

2610:8::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

AS394089#176 GCP-ENTERPRISE-USER-TRAFFIC - Google LLC460,032

AS40065#177 CNSERVERS - CNSERVERS LLC453,376

AS32934#178 FACEBOOK - Facebook, Inc.449,024

AS2381#180 WISCNET1-AS - WiscNet441,344

AS7843#181 TWC-7843-BB - Charter Communications Inc438,784

AS398781#182 OSL-188 - OCULUS NETWORKS INC437,248

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