AS187 DNScast

DNSCAST-AS - DNScast · registered in the United States

IPv4 addresses4,6082 prefixes · <0.001% of announced IPv4

Rank in United States#4,264largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#14,265of 79,396 networks with IPv4

IPv617 x /482 prefixes

CountryUnited States18,679 ASNs registered there

Open AS187 in ASN lookup Look up an IP in this network (72.42.112.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

72.42.112.0/20
203.119.88.0/23

IPv6 prefixes

All 2 prefixes.

2001:dd8:7::/48
2620:171:d00::/44

Similar-sized networks in United States

ASNNameIPv4 addresses

AS22677#4261 CHARTER-22677-MO-IL-C3 - Charter Communications LLC4,608

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AS11054#4263 LIVEPERSON - LivePerson, Inc.4,608

AS395359#4265 ITH-AS-1 - InTouch Health4,608

AS398946#4266 CONTENTKEEPER-AS-ARIN - ContentKeeper Technologies4,608

AS1733#4267 DISACENT-NIPR-ASN - United States Department of Defense (DoD)4,608

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