AS39588 MIMECAST-DE Mimecast Services Limited

MIMECAST-DE Mimecast Services Limited · registered in the United Kingdom

IPv4 addresses2,8166 prefixes · <0.001% of announced IPv4

Rank in United Kingdom#616largest network in GB by IPv4 space, of 2,074 · <0.01% of GB

Rank worldwide#19,292of 79,396 networks with IPv4

IPv62 x /481 prefixes

CountryUnited Kingdom2,261 ASNs registered there

Open AS39588 in ASN lookup Look up an IP in this network (51.163.158.1) All networks in United Kingdom

IPv4 prefixes

All 6 prefixes, in address order.

51.163.158.0/23
62.140.7.0/24
62.140.10.0/24
147.28.34.0/23
170.10.142.0/24
194.104.108.0/22

IPv6 prefixes

All 1 prefix.

2a02:5be0:2::/47

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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