AS6406 Thomas Jefferson National Accelerator Facility

CEBAF - Thomas Jefferson National Accelerator Facility · registered in the United States

IPv4 addresses65,7922 prefixes · 0.002% of announced IPv4

Rank in United States#947largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,780of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS6406 in ASN lookup Look up an IP in this network (129.57.0.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

129.57.0.0/16
192.70.245.0/24

IPv6 prefixes

All 1 prefix.

2620:0:22f0::/48

Similar-sized networks in United States

ASNNameIPv4 addresses

AS1224#944 NCSA-AS - University of Illinois65,792

AS4385#945 RIT-ASN - Rochester Institute of Technology65,792

AS6377#946 4JNET - Eugene School District 4J65,792

AS11078#948 BROWN - Brown University65,792

AS11540#949 RTI - Research Triangle Institute65,792

AS23171#950 MANHATTAN-EDU - Manhattan College65,792

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