Autonomous system
AS37235 Mimecast South Africa - Mimecast South Africa
Hosting RIPE
Summary
Mimecast South Africa
business email security south-africa
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.zaand the registrant netnameORG-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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| NAPAfrica IX Cape Town | Cape Town, South Africa | 196.60.71.154 |
| Johannesburg Internet Exchange | Johannesburg, South Africa | 196.60.96.70 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-04, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 3.84K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| ZA | South Africa | 5 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS37235- Registry name
- ORG-MSA1-AFRINIC
- Registrant
- Mimecast South Africa
- Registered
- 2010-07-09
- Last changed
- 2025-10-30
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 93% valid · 13 valid, 1 with no ROA
- ROAs
- 12 authorising AS37235
- ASPA
- no ASPA record
- IRR
- 100% registered · 14 of 14 announcements
- Route objects
- 34 naming AS37235
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 453 networks and 1,853 prefixes, as published 2026-11-05. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere