AS9 Carnegie Mellon University

CMU-ROUTER - Carnegie Mellon University · registered in the United States

IPv4 addresses133,6349 prefixes · 0.004% of announced IPv4

Rank in United States#456largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#1,466of 79,396 networks with IPv4

IPv665,535 x /4816 prefixes

CountryUnited States18,679 ASNs registered there

Open AS9 in ASN lookup Look up an IP in this network (128.2.0.1) All networks in United States

IPv4 prefixes

All 9 prefixes, in address order.

128.2.0.0/16
128.237.0.0/16
137.164.1.144/31
192.5.146.0/24
192.12.32.0/24
192.58.107.0/24
192.80.210.0/24
204.194.28.0/22
209.129.244.0/23

IPv6 prefixes

All 16 prefixes.

2607:fb28::/44
2607:fb28:11::/48
2607:fb28:12::/47
2607:fb28:14::/46
2607:fb28:18::/45
2607:fb28:20::/43
2607:fb28:40::/42
2607:fb28:80::/41
2607:fb28:100::/40
2607:fb28:200::/39
2607:fb28:400::/38
2607:fb28:800::/37
2607:fb28:1000::/36
2607:fb28:2000::/35
2607:fb28:4000::/34
2607:fb28:8000::/33

Similar-sized networks in United States

ASNNameIPv4 addresses

AS21693#453 BGP-ASN-21693 - Xcel Energy Inc.134,144

AS3724#454 ALASKA-ANET - State of Alaska133,888

AS7321#455 LNET-ASN - LocalNet Corporation133,888

AS50#457 ORNL-MSRNET - Oak Ridge National Laboratory133,632

AS27#458 UMDNET - University of Maryland133,632

AS18978#459 ENZUINC-US - Enzu Inc133,376

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