AS1249 University of Massachusetts - AMHERST

FIVE-COLLEGES-AS - University of Massachusetts - AMHERST · registered in the United States

IPv4 addresses82,4324 prefixes · 0.003% of announced IPv4

Rank in United States#702largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,140of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS1249 in ASN lookup Look up an IP in this network (72.19.64.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

72.19.64.0/18
128.119.0.0/16
192.80.83.0/24
192.189.138.0/24

Other ASNs named University of Massachusetts - AMHERST

2 other networks use the same organisation name; together with AS1249 they announce 84,224 IPv4 addresses.

ASNNameIPv4 addresses

AS1929UMASSNET-NET - University of Massachusetts - AMHERST US1,792

AS168UMASS-AMHERST - University of Massachusetts - AMHERST USIPv6 only

Similar-sized networks in United States

ASNNameIPv4 addresses

AS22612#699 NAMECHEAP-NET - Namecheap, Inc.82,752

AS17135#700 OHIOU - Ohio University82,688

AS29946#701 UNION-CELL - Union Wireless82,688

AS2902#703 WN-WY-AS - University of Wyoming82,432

AS5939#704 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD)82,432

AS6595#705 DODDSEUR - U.S. Department of Defense Education Activity82,432

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