AS19226 NSF'S NOIRLAB

AURA-SOUTH - NSF'S NOIRLAB · registered in the United States

IPv4 addresses65,2808 prefixes · 0.002% of announced IPv4

Rank in United States#1,324largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,480of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS19226 in ASN lookup Look up an IP in this network (139.229.0.1) All networks in United States

IPv4 prefixes

All 8 prefixes, in address order.

139.229.0.0/17
139.229.128.0/22
139.229.133.0/24
139.229.134.0/23
139.229.136.0/21
139.229.144.0/20
139.229.160.0/19
139.229.192.0/18

Similar-sized networks in United States

ASNNameIPv4 addresses

AS6009#1321 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD)65,280

AS6124#1322 MARIST - Marist University65,280

AS19661#1323 SUSQ-BALA - Susquehanna International Group, LLP65,280

AS22498#1325 PINELLAS-COUNTY - Pinellas County Government65,280

AS26783#1326 MARICOPA-COUNTY-COMMUNITY-COLLEGE-DISTRICT - Maricopa County Community College District65,280

AS30710#1327 SPECT-19-AS - Spectrum Health65,280

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