206208 looking glass

AS42427 Mimecast Services Limited 🇬🇧 GB

Announcing 17 prefixes, seen at the RIS collectors.

IPv4 prefixes
15
3,840 (15 × /24)
IPv6 prefixes
2
2 × /48
Upstreams
3
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
AS42427
Name
Mimecast Services Limited
Organisation
Mimecast Services Limited
Country
🇬🇧 GB
RIR
RIPENCC
Allocated
2017-05-05

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

13 valid (76.5%) 0 invalid (0.0%) 4 no ROA (23.5%)

Whois

Fetched from whois.ripe.net

as-block:       AS42383 - AS42953
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2026-06-23T05:12:23Z
last-modified:  2026-06-23T05:12:23Z
source:         RIPE

aut-num:        AS42427
as-name:        MIMECAST-UK
org:            ORG-MSL21-RIPE
import:         from AS2914 accept ANY
export:         to AS2914 announce AS42427
import:         from AS1290 accept ANY
export:         to AS1290 announce AS42427
import:         from AS3910 accept ANY
export:         to AS3910 announce AS42427
admin-c:        CGRD-RIPE
tech-c:         CGRD-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MCSL-RIPE-MNT
created:        2017-05-05T13:56:06Z
last-modified:  2019-07-08T07:23:24Z
source:         RIPE

organisation:   ORG-MSL21-RIPE
org-name:       Mimecast Services Limited
country:        GB
reg-nr:         04901524
org-type:       LIR
address:        1 Finsbury Avenue
address:        EC2M 2PF
address:        London
address:        UNITED KINGDOM
phone:          +442078478700
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MCSL-RIPE-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MCSL-RIPE-MNT
abuse-c:        CGRD-RIPE
created:        2014-05-05T13:57:11Z
last-modified:  2026-05-13T07:04:23Z
source:         RIPE # Filtered
admin-c:        CGRD-RIPE

role:           Mimecast - CoreGrid
address:        1 Finsbury Avenue
address:        London
address:        EC2M 2PF
address:        United Kingdom
phone:          +44 (0)207 847 8700
admin-c:        MCNO2003-RIPE
tech-c:         MCNO2003-RIPE
remarks:        ---------------------------------
abuse-mailbox:  abuse@mimecast.com
remarks:        ---------------------------------
nic-hdl:        CGRD-RIPE
mnt-by:         MCSL-RIPE-MNT
created:        2014-05-20T16:18:44Z
last-modified:  2023-09-28T13:31:26Z
source:         RIPE # Filtered