AS3428 ESnet

ESNET-AS - ESnet · registered in the United States

IPv4 addresses68,09612 prefixes · 0.002% of announced IPv4

Rank in United States#820largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,520of 79,396 networks with IPv4

IPv616 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS3428 in ASN lookup Look up an IP in this network (130.20.1.1) All networks in United States

IPv4 prefixes

All 12 prefixes, in address order.

130.20.1.0/24
130.20.2.0/23
130.20.4.0/22
130.20.8.0/21
130.20.16.0/20
130.20.32.0/19
130.20.64.0/18
130.20.128.0/17
192.35.193.0/24
192.101.100.0/22
192.101.104.0/22
192.101.108.0/23

IPv6 prefixes

All 1 prefix.

2620:0:50f0::/44

Other ASNs named ESnet

6 other networks use the same organisation name; together with AS3428 they announce 734,464 IPv4 addresses.

ASNNameIPv4 addresses

AS291ESNET-EAST - ESnet US262,144

AS292ESNET-WEST - ESnet US262,144

AS293ESNET - ESnet US140,288

AS3431ESNET-AS - ESnet US1,024

AS3425ESNET-AS - ESnet US512

AS3443ESNET-AS - ESnet US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS7872#817 USAP-ASN - United States Antarctic Program68,352

AS3147#818 US-BANCORP - U.S. BANCORP68,352

AS25996#819 FBICJIS - FBI Criminal Justice Information Services68,096

AS6319#821 MARRIOT-ASN - Marriot Corporation68,096

AS11252#822 ISU-NET-AS - Idaho State University68,096

AS15164#823 UPNLLC - Unite Private Networks LLC.67,840

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