AS3571 Ernst & Young LLP

EY-AS - Ernst & Young LLP · registered in the United States

IPv4 addresses4,6084 prefixes · <0.001% of announced IPv4

Rank in United States#4,281largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#14,309of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS3571 in ASN lookup Look up an IP in this network (199.49.16.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

199.49.16.0/21
199.49.81.0/24
199.52.8.0/21
199.52.101.0/24

Other ASNs named Ernst & Young LLP

3 other networks use the same organisation name; together with AS3571 they announce 12,800 IPv4 addresses.

ASNNameIPv4 addresses

AS609EY-AS-L - Ernst & Young LLP US4,864

AS40810EY-AS-SG - Ernst & Young LLP US1,792

AS400060EY-AS-DSFW - Ernst & Young LLP US1,536

Similar-sized networks in United States

ASNNameIPv4 addresses

AS2015#4278 MSEN-SYSTEM - Msen, Inc.4,608

AS3380#4279 PPPL-AS1 - Princeton Plasma Physics Laboratory4,608

AS3503#4280 WEBNET - WebNet LLC4,608

AS4284#4282 CENTURYLINK-TSDS-FLTLHS - CenturyLink Communications, LLC4,608

AS4868#4283 PIONEER - Pioneer Hi-Bred International, Inc.4,608

AS6998#4284 BRITEVOICE - Concentrix CVG Brite Voice Systems LLC4,608

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