AS30031 Mimecast North America Inc
AS30031 is operated by Mimecast North America Inc and registered with ARIN (US) since 2017-07-07.
It announces 21 IPv4 and 5 IPv6 prefixes, 76% of them RPKI valid.
RIPE RIS sees 5 upstream and peer networks and 0 downstream networks next to it.
| Name | Mimecast North America Inc |
|---|---|
| Registry handle | MIMECAST-US |
| Registry (RIR) | ARIN |
| Country | United States (US) |
| Delegated on | 2017-07-07 |
| Prefixes (IPv4 / IPv6) | 21 / 5 |
| RPKI valid | 76% (20 / 26) |
| Upstreams and peers | 5 |
| Downstream networks | 0 |
Routing health
- AS30031 announces 21 IPv4 and 5 IPv6 prefixes.
- 20 of 26 announced prefixes are RPKI valid.
- 6 announced prefixes are not covered by a ROA of AS30031 (they may have none, or another network’s).
- 5 upstreams and peers, 0 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 26
- 41.74.203.0/24
- 63.128.21.0/24
- 170.10.128.0/23
- 170.10.130.0/24
- 170.10.131.0/24
- 170.10.132.0/23
- 170.10.140.0/24
- 170.10.142.0/24
- 170.10.150.0/24
- 170.10.151.0/24
- 170.10.152.0/24
- 170.10.153.0/24
- 170.10.156.0/24
- 170.10.157.0/24
- 205.139.110.0/24
- 205.139.111.0/24
- 207.211.30.0/24
- 216.145.218.0/24
- 216.145.219.0/24
- 216.145.222.0/24
- 216.205.24.0/24
- 2620:134:6000::/48
- 2620:134:6001::/48
- 2620:134:6002::/48
- 2620:134:6008::/48
- 2620:134:6009::/48
Upstreams and peers 5
The networks RIPE RIS sees next to AS30031 in BGP paths, the most visible first.
Peering
AS30031 is not in PeeringDB. Networks that peer at internet exchanges are expected to keep a record there with their policy, exchange addresses and contacts.
More about AS30031
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-15 08:38 UTC. The country is where the AS number was registered, not necessarily where the network operates.