AS33538 Mimecast North America Inc

MIMECAST-CA - Mimecast North America Inc · registered in the United States

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4

Rank in United States#7,959largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#35,621of 79,396 networks with IPv4

IPv62 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS33538 in ASN lookup Look up an IP in this network (170.10.144.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

170.10.144.0/22

IPv6 prefixes

All 1 prefix.

2620:134:6006::/47

Other ASNs named Mimecast North America Inc

1 other network uses the same organisation name; together with AS33538 they announce 6,656 IPv4 addresses.

ASNNameIPv4 addresses

AS30031MIMECAST-US - Mimecast North America Inc US5,632

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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