206208 looking glass

AS30031 Mimecast North America Inc 🇺🇸 US

Announcing 26 prefixes, seen at the RIS collectors.

IPv4 prefixes
21
5,888 (23 × /24)
IPv6 prefixes
5
5 × /48
Upstreams
4
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it

Registry and operator data

AS number
AS30031
Name
Mimecast North America Inc
Organisation
Mimecast North America Inc
Country
🇺🇸 US
RIR
ARIN
Allocated
2017-07-07

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

20 valid (76.9%) 0 invalid (0.0%) 6 no ROA (23.1%)

Announcement history

One point per day, recorded at each table import

0511162109-1809-2510-0210-0910-1610-2310-3011-02
IPv4 IPv6

Recorded changes

New prefixes and origin changes seen on the live stream

WhenChangePrefixOriginPath
2026-11-01 13:25:23Z origin change 41.74.203.0/24 AS30031 → AS42427 17639335642427
2026-11-01 13:24:22Z origin change 41.74.203.0/24 AS42427 → AS30031 17639335630031
2026-11-01 04:59:16Z origin change 216.145.218.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 41.74.203.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 216.145.222.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 170.10.142.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 216.145.218.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 41.74.203.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 216.145.222.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 04:59:16Z origin change 170.10.142.0/24 AS30031 → AS39588 37989563001321324657646139588
2026-11-01 02:50:03Z origin change 170.10.142.0/24 AS42427 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 216.145.222.0/24 AS42427 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 216.145.218.0/24 AS42427 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 41.74.203.0/24 AS42427 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 170.10.142.0/24 AS39588 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 216.145.222.0/24 AS39588 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 216.145.218.0/24 AS39588 → AS30031 49134533566424646130031
2026-11-01 02:50:03Z origin change 41.74.203.0/24 AS39588 → AS30031 49134533566424646130031
2026-10-31 16:37:08Z origin change 216.145.222.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:37:08Z origin change 170.10.142.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:37:08Z origin change 216.145.218.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:37:08Z origin change 41.74.203.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:31:21Z origin change 41.74.203.0/24 AS33538 → AS30031 349271299335630031
2026-10-31 16:31:20Z origin change 216.145.222.0/24 AS33538 → AS30031 349271299335630031
2026-10-31 16:31:20Z origin change 216.145.218.0/24 AS33538 → AS30031 349271299335630031
2026-10-31 16:31:20Z origin change 170.10.142.0/24 AS33538 → AS30031 349271299335630031
2026-10-31 16:30:47Z origin change 216.145.222.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:30:47Z origin change 170.10.142.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:30:47Z origin change 216.145.218.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 16:30:47Z origin change 41.74.203.0/24 AS30031 → AS33538 349271299335633538
2026-10-31 14:15:52Z origin change 41.74.203.0/24 AS39588 → AS30031 349271299335630031
2026-10-31 14:15:52Z origin change 170.10.142.0/24 AS39588 → AS30031 349271299335630031
2026-10-31 14:15:52Z origin change 216.145.218.0/24 AS39588 → AS30031 349271299335630031
2026-10-31 14:15:52Z origin change 216.145.222.0/24 AS39588 → AS30031 349271299335630031
2026-10-30 20:13:59Z origin change 170.10.142.0/24 AS30031 → AS42427 50300335642427
2026-10-30 20:13:31Z origin change 170.10.142.0/24 AS39588 → AS30031 380013491335630031
2026-10-30 20:13:26Z origin change 170.10.142.0/24 AS30031 → AS39588 4504966962914335639588
2026-10-30 20:13:21Z origin change 170.10.142.0/24 AS39588 → AS30031 557202914335630031
2026-10-30 12:32:50Z origin change 41.74.203.0/24 AS30031 → AS39588 34927566556939335639588
2026-10-30 12:32:20Z origin change 170.10.142.0/24 AS30031 → AS39588 34927566556939335639588
2026-10-30 12:32:20Z origin change 216.145.222.0/24 AS30031 → AS39588 34927566556939335639588
2026-10-30 12:32:20Z origin change 216.145.218.0/24 AS30031 → AS39588 34927566556939335639588
2026-10-29 20:31:56Z origin change 170.10.142.0/24 AS30031 → AS42427 1328253356291442427
2026-10-29 20:31:43Z origin change 170.10.142.0/24 AS30031 → AS42427 21628582806762291442427
2026-10-29 20:30:42Z origin change 170.10.142.0/24 AS39588 → AS30031 557206939335630031
2026-10-29 20:30:41Z origin change 170.10.142.0/24 AS30031 → AS39588 4504966962914335639588
2026-10-29 20:30:26Z origin change 170.10.142.0/24 AS39588 → AS30031 380013491335630031
2026-10-29 20:30:23Z origin change 170.10.142.0/24 AS42427 → AS30031 132825174335630031
2026-10-29 13:02:45Z origin change 170.10.142.0/24 AS30031 → AS39588 17639335639588
2026-10-29 13:02:12Z origin change 170.10.142.0/24 AS39588 → AS30031 557206939335630031
2026-10-29 13:02:08Z origin change 170.10.142.0/24 AS30031 → AS39588 4504966962914335639588
2026-10-29 13:01:51Z origin change 170.10.142.0/24 AS39588 → AS30031 132825174335630031
2026-10-29 11:59:01Z origin change 216.145.222.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 11:59:01Z origin change 216.145.218.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 11:59:01Z origin change 170.10.142.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 11:59:01Z origin change 41.74.203.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 10:37:50Z origin change 41.74.203.0/24 AS33538 → AS30031 349271299335630031
2026-10-29 10:37:50Z origin change 170.10.142.0/24 AS33538 → AS30031 349271299335630031
2026-10-29 10:37:50Z origin change 216.145.218.0/24 AS33538 → AS30031 349271299335630031
2026-10-29 10:37:50Z origin change 216.145.222.0/24 AS33538 → AS30031 349271299335630031
2026-10-29 09:19:29Z origin change 41.74.203.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 09:19:29Z origin change 216.145.222.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 09:19:29Z origin change 170.10.142.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 09:19:29Z origin change 216.145.218.0/24 AS30031 → AS33538 349271299335633538
2026-10-29 06:32:49Z origin change 41.74.203.0/24 AS42427 → AS30031 1403577646130031
2026-10-29 06:32:49Z origin change 170.10.142.0/24 AS42427 → AS30031 1403577646130031
2026-10-29 06:32:49Z origin change 216.145.222.0/24 AS42427 → AS30031 1403577646130031
2026-10-29 06:32:49Z origin change 216.145.218.0/24 AS42427 → AS30031 1403577646130031
2026-10-28 13:24:28Z origin change 170.10.142.0/24 AS30031 → AS42427 450496696291442427
2026-10-28 13:23:29Z origin change 170.10.142.0/24 AS39588 → AS30031 380013491335630031
2026-10-28 13:23:23Z origin change 170.10.142.0/24 AS30031 → AS42427 50300335642427
2026-10-28 13:23:04Z origin change 170.10.142.0/24 AS39588 → AS30031 557206939335630031
2026-10-28 08:03:19Z origin change 216.145.218.0/24 AS30031 → AS42427 37721335642427
2026-10-28 08:03:19Z origin change 216.145.222.0/24 AS30031 → AS42427 37721335642427
2026-10-28 08:03:19Z origin change 41.74.203.0/24 AS30031 → AS42427 37721335642427
2026-10-27 17:35:57Z origin change 41.74.203.0/24 AS33538 → AS30031 557206939335630031
2026-10-27 17:35:57Z origin change 216.145.218.0/24 AS33538 → AS30031 557206939335630031
2026-10-27 17:35:57Z origin change 216.145.222.0/24 AS33538 → AS30031 557206939335630031
2026-10-27 07:26:39Z origin change 170.10.142.0/24 AS30031 → AS42427 328840327727174335642427
2026-10-27 07:26:39Z origin change 41.74.203.0/24 AS30031 → AS42427 328840327727174335642427
2026-10-27 07:26:39Z origin change 216.145.218.0/24 AS30031 → AS42427 328840327727174335642427
2026-10-27 07:26:39Z origin change 216.145.222.0/24 AS30031 → AS42427 328840327727174335642427
2026-10-27 05:06:42Z origin change 41.74.203.0/24 AS42427 → AS30031 14907335630031
2026-10-27 05:06:41Z origin change 216.145.218.0/24 AS39588 → AS30031 14907335630031
2026-10-27 05:06:41Z origin change 216.145.222.0/24 AS39588 → AS30031 14907335630031
2026-10-27 05:06:30Z origin change 41.74.203.0/24 AS30031 → AS42427 132825335642427
2026-10-27 05:06:30Z origin change 216.145.218.0/24 AS30031 → AS39588 132825335639588
2026-10-27 05:06:30Z origin change 216.145.222.0/24 AS30031 → AS39588 132825335639588
2026-10-27 04:40:46Z origin change 41.74.203.0/24 AS42427 → AS30031 349271299335630031
2026-10-27 04:40:46Z origin change 170.10.142.0/24 AS42427 → AS30031 349271299335630031
2026-10-27 04:40:46Z origin change 216.145.218.0/24 AS42427 → AS30031 349271299335630031
2026-10-27 04:40:46Z origin change 216.145.222.0/24 AS42427 → AS30031 349271299335630031
2026-10-25 05:47:01Z origin change 170.10.142.0/24 AS30031 → AS39588 17639335639588
2026-10-25 05:46:50Z origin change 170.10.142.0/24 AS39588 → AS30031 132825335630031
2026-10-25 05:46:29Z origin change 170.10.142.0/24 AS30031 → AS39588 4504966962914335639588
2026-10-25 05:46:18Z origin change 170.10.142.0/24 AS39588 → AS30031 557202914335630031
2026-10-25 05:46:07Z origin change 170.10.142.0/24 AS30031 → AS39588 557206939646139588
2026-10-25 05:46:05Z origin change 170.10.142.0/24 AS39588 → AS30031 380013491335630031
2026-10-25 05:21:28Z origin change 41.74.203.0/24 AS30031 → AS42427 328840327727174335642427
2026-10-25 05:21:28Z origin change 216.145.218.0/24 AS30031 → AS42427 328840327727174335642427