AS37235 — Mimecast South Africa - Mimecast South Africa

Network type: hosting

AS37235 announces 4 IPv4 prefixes covering 3,840 addresses and 1 IPv6 prefixes.

About this network

The AS handle MimecastSA is held by Mimecast South Africa.

What it's used for

• The space carries corporate email security infrastructure, evidenced by the reverse DNS record za-smtp-delivery-126.mimecast.co.za and the registrant netname ORG-MSA1-AFRINIC.
• The AS announces 3840 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, with 15 observed neighbours, indicating a business network with moderate peering relationships rather than a transit provider.

Notable

• The largest prefix 41.74.192.0/21 is registered to Mimecast South Africa, while the remaining three prefixes (41.74.204.0/22, 41.74.200.0/23, 41.74.202.0/24) show unknown registrants in the RDAP data.
• The address inventory is finely subdivided into four contiguous IPv4 blocks within the 41.74.192.0/20 range, consistent with an internal corporate estate segmented by function or site.

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

Announced prefixes

• 41.74.192.0/21
• 41.74.200.0/23
• 41.74.202.0/24
• 41.74.204.0/22
• 2c0f:f1e0:1::/48

Upstream networks

• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS3741 Dimension Data
• AS6939 Hurricane Electric LLC
• AS30844 Liquid Telecommunications Ltd

Adjacent networks

• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS3741 Dimension Data
• AS6939 Hurricane Electric LLC
• AS30844 Liquid Telecommunications Ltd

Routing security

• RPKI: 13 valid, 0 invalid and 1 not-found announcements; 12 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 34 route objects.
• Listed in as-sets: AS-CINX-RS, AS-DIGINETITCC-PEERS, AS-DINX-RS, AS-HURRICANEV6, AS-IS-INT, AS-ISZA, AS-JINX-RS, AS-LIQUID, AS-LIQUID-JINXPEERS, AS-WA-PEERS, AS153522:AS-JOYDATASERVICES, AS15830:AS-EQUINIX-JN, AS37271:AS-PEERS, AS37271:AS-PEERS:AS37235, AS3741:AS-IS-INT, AS3741:AS-ISZA.

Internet exchanges

• NAPAfrica IX Cape Town — Cape Town, South Africa
• Johannesburg Internet Exchange — Johannesburg, South Africa