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	Prefix	Description
	45.91.16.0/24	Mimecast Services Limited
	45.91.17.0/24	-

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS8220	COLT	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS8220	COLT	✔	✘
	AS174	Cogent Communications, LLC	✔	✘
	AS1239	Sprint Wireline (Cogent)	✔	✘

aut-num:        AS208638
as-name:        mimecast-it-corp
org:            ORG-MSL44-RIPE
import:         from AS174 accept ANY
export:         to AS174 announce AS208638
import:         from AS49425 accept ANY
export:         to AS49425 announce AS208638
export:         to AS7545 announce AS208638
import:         from AS7545 accept ANY
import:         from AS36086 accept ANY
export:         to AS36086 announce AS208638
import:         from AS8220 accept ANY
export:         to AS8220 announce AS208638
import:         from AS327782 accept ANY
export:         to AS327782 announce AS208638
import:         from AS328317 accept ANY
export:         to AS328317 announce AS208638
import:         from AS1221 accept ANY
export:         to AS1221 announce AS208638
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         mnt-uk-mimecast-it-1
created:        2019-07-01T09:11:07Z
last-modified:  2026-04-06T18:03:51Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************


organisation:   ORG-MSL44-RIPE
org-name:       Mimecast Services Limited
country:        GB
org-type:       LIR
address:        Dummy address for ORG-MSL44-RIPE
# Email removed, Log into bgp.tools to see whois emails/phone numbers
abuse-c:        AR53361-RIPE
mnt-ref:        mnt-uk-mimecast-it-1
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         mnt-uk-mimecast-it-1
created:        2019-06-20T11:35:57Z
last-modified:  2026-05-13T07:04:56Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************

Last Update: 2026-06-13T03:24:12Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
LEVEL3	as-towardex	383
RIPE	as8220:as-coltuk	753
AFRINIC	as-set-aerocom	7
ALTDB	as-telx	183
RIPE	as-liquid-ext	677
RIPE	as-drt	166
AFRINIC	as-set-metrofibre	146
RADB	as-kddcustomer2	8206
RADB	as2764:as-bgp-custs	1758