AS19580 A.R.T. Advisors, LLC

ART-LLC - A.R.T. Advisors, LLC · registered in the United States

IPv4 addresses2,3048 prefixes · <0.001% of announced IPv4

Rank in United States#5,886largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#20,877of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS19580 in ASN lookup Look up an IP in this network (149.85.1.1) All networks in United States

IPv4 prefixes

All 8 prefixes, in address order.

149.85.1.0/24
149.85.2.0/24
149.85.5.0/24
149.85.6.0/23
149.85.8.0/24
149.85.11.0/24
149.85.12.0/24
149.85.101.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS19311#5883 STEWART-1 - Stewart Title2,304

AS19453#5884 TWRS-RI - Towerstream I, Inc.2,304

AS19460#5885 SUTH - Sutherland Global Services, Inc.2,304

AS19602#5887 AS19602 - Cantor Fitzgerald & Co.2,304

AS19720#5888 CABLEVISION-CORP - Cablevision Systems Corp.2,304

AS19796#5889 SHUBERT - Shubert Organization, Inc.2,304

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