AS39588 — MIMECAST-DE

AS39588 announces 6 IPv4 prefixes covering 2,816 addresses and 1 IPv6 prefixes.

About this network

MIMECAST-DE is operated by Mimecast Services Limited.

What it's used for

• The address space carries email security infrastructure, evidenced by reverse DNS entries such as de-smtp-delivery-128.mimecast.com and netnames like DE-MIMECAST-20180801 and EU-MIME-01.
• The AS announces 2816 IPv4 addresses across 6 prefixes and 1 IPv6 prefix, with only 3 observed routing neighbours, indicating a small, dedicated corporate network rather than a transit or access provider.
• Traffic from this AS consists of Mimecast's email security and risk management services, including SMTP delivery endpoints for its global customer base.

Notable

• Registrants align with the announcer, including Mimecast - CoreGrid, Mimecast Germany GmbH, and Mimecast North America Inc, with one prefix (51.163.158.0/23) registered to Equinix EMEA Admin.
• The address inventory is finely subdivided across multiple registrants and netnames, reflecting site-by-site segmentation for a global corporate estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 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
• 2a02:5be0:2::/47

Upstream networks

• AS6461 Zayo Bandwidth
• AS3356 Level 3 Parent, LLC
• AS24989 Equinix (Germany) GmbH

Adjacent networks

• AS6461 Zayo Bandwidth
• AS3356 Level 3 Parent, LLC
• AS24989 Equinix (Germany) GmbH