AS5724 University of Massachusetts Medical School

UMASSMED - University of Massachusetts Medical School · registered in the United States

IPv4 addresses65,5366 prefixes · 0.002% of announced IPv4

Rank in United States#1,097largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,084of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS5724 in ASN lookup Look up an IP in this network (146.189.0.1) All networks in United States

IPv4 prefixes

All 6 prefixes, in address order.

146.189.0.0/17
146.189.128.0/21
146.189.136.0/21
146.189.144.0/20
146.189.160.0/19
146.189.192.0/18

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS6056#1098 COLBY - Colby College65,536

AS6074#1099 LIUNET - Long Island University65,536

AS6112#1100 AUBURN - Auburn University65,536

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