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	Prefix	Description
	41.74.203.0/24	Mimecast
	91.220.42.0/24	Mimecast Services Limited
	170.10.142.0/24	Mimecast North America Inc
	185.58.84.0/24	Mimecast Services Limited
	185.58.85.0/24	Mimecast Services Limited
	185.58.86.0/24	Mimecast Services Limited
	185.58.87.0/24	Mimecast Services Limited
	193.7.204.0/24	Mimecast Services Limited
	193.7.205.0/24	Mimecast Services Limited
	195.130.217.0/24	Mimecast Services Limited
	207.82.80.0/24	CenturyLink Communications, LLC
	216.35.243.0/24	CenturyLink Communications, LLC
	216.35.244.0/24	CenturyLink Communications, LLC
	216.145.222.0/24	Mimecast North America Inc
	216.145.218.0/24	Mimecast North America Inc
	2a02:5be0::/48	Mimecast Services Limited
	2a02:5be0:1::/48	Mimecast Services Limited

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3356	Lumen (Level 3)	✔	✔
	AS6461	Zayo Bandwidth	✔	✔
	AS2914	NTT America, Inc.	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS6461	Zayo Bandwidth	✔	✔
	AS3356	Lumen (Level 3)	✔	✔
	AS2914	NTT America, Inc.	✔	✔

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:        DUMY-RIPE
tech-c:         DUMY-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
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-MSL21-RIPE
org-name:       Mimecast Services Limited
country:        GB
org-type:       LIR
address:        Dummy address for ORG-MSL21-RIPE
e-mail:         unread@ripe.net
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:  2023-03-02T16:20:07Z
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: 2025-04-25T03:25:43Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
NTTCOM	as2914:as-europe-v6	73258
LEVEL3	as-level3-origins-eu	0
NTTCOM	as2914:as-europe	73925
RIPE	as-mfnx	72060
LEVEL3	as-level3-origins-na	0