AS11951 Medical Computer Systems

MCSP - Medical Computer Systems · registered in the United States

IPv4 addresses37,37612 prefixes · 0.001% of announced IPv4

Rank in United States#1,620largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#4,446of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS11951 in ASN lookup Look up an IP in this network (66.186.128.1) All networks in United States

IPv4 prefixes

All 12 prefixes, in address order.

66.186.128.0/23
66.186.130.0/23
66.186.132.0/22
66.186.136.0/21
204.152.42.0/23
205.147.160.0/19
207.152.128.0/18
209.50.192.0/23
209.50.194.0/23
209.50.196.0/22
209.50.200.0/21
209.50.208.0/20

Similar-sized networks in United States

ASNNameIPv4 addresses

AS395846#1617 DIRECTCOMID - Direct Communications Rockland, Inc37,632

AS20340#1618 CALLTOWER - CallTower, Inc.37,632

AS55140#1619 SHO-ME-TECHNOLOGIES - Sho Me Technologies, LLC37,376

AS401696#1621 COGNETCLOUD - cognetcloud INC37,376

AS54179#1622 VCOE - Ventura County Office of Education37,124

AS11114#1623 WINTEK-CORP - Wintek Corporation37,120

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