AS37235Mimecast South Africa
South AfricaRegistryAFRINICTypeContentAs of 11th November 2026, AS37235 (Mimecast South Africa), a content network registered in South Africa with AFRINIC, originates 13 IPv4 prefixes covering 5.9k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 14,763rd-largest of the 80,747 networks we see originating IPv4, and the 171st-largest of 657 in South Africa. It is seen behind 5 upstream networks, most often AS15830 (Equinix, Inc.) and AS3741 (Dimension Data). 93% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 71% of its routes reach at least 90% of full-feed peers, and 4 prefixes are also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS37235 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS37235 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
26
adjacent networks
- Upstreams
- 519%
- Peers
- 2181%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS15830Equinix, Inc. |  NL | Peer | 494 | 70 |
| AS3741Dimension Data | ZA | Peer | 168 | 102 |
| AS30844Liquid Intelligent Technologies |  GB | Peer | 42 | 32 |
| AS6939Hurricane Electric LLC |  US | Peer | 41 | 5 |
| AS37497Network Platforms (PTY) LTD | ZA | Peer | 14 | 2 |
Prefixes
The largest blocks AS37235 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 41.74.192.0/22 | 1k | 76/76 |
| 41.74.196.0/22 | 1k | 76/76 |
| 41.74.204.0/22 | 1k | 76/76 |
| 41.74.200.0/23 | 512 | 76/76 |
| 41.74.192.0/24 | 256 | 76/76 |
| 41.74.193.0/24 | 256 | 76/76 |
| 41.74.194.0/24 | 256 | 76/76 |
| 41.74.195.0/24 | 256 | 76/76 |
| 41.74.202.0/24 | 256 | 76/76 |
| 41.74.203.0/24 | 256 | 3/76 |
Routing health
How AS37235's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid92.9%13
- Invalid0.0%0
- No ROA7.1%1
Propagation
- Globally propagated90% of full-feed peers or more71.4%10
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%28.6%4
Prefix sizes
IPv4 — 13 prefixes
IPv6 — 1 prefixes
- /4865.5k × /64100.0%1
Recent changes
Announcements that started or stopped since 12th Oct 2026.
No announcement by AS37235 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.