AS50 Oak Ridge National Laboratory

ORNL-MSRNET - Oak Ridge National Laboratory · registered in the United States

IPv4 addresses133,63210 prefixes · 0.004% of announced IPv4

Rank in United States#457largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#1,467of 79,396 networks with IPv4

IPv616 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS50 in ASN lookup Look up an IP in this network (128.219.0.1) All networks in United States

IPv4 prefixes

All 10 prefixes, in address order.

128.219.0.0/16
160.91.0.0/16
192.12.68.0/24
192.31.96.0/24
192.148.93.0/24
192.148.96.0/23
192.188.177.0/24
192.188.178.0/23
192.188.180.0/24
192.188.182.0/24

IPv6 prefixes

All 1 prefix.

2620:0:2b30::/44

Similar-sized networks in United States

ASNNameIPv4 addresses

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

AS7321#455 LNET-ASN - LocalNet Corporation133,888

AS9#456 CMU-ROUTER - Carnegie Mellon University133,634

AS27#458 UMDNET - University of Maryland133,632

AS18978#459 ENZUINC-US - Enzu Inc133,376

AS111#460 BOSTONU-AS - Boston University133,376

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