ASN Lookup Tool

Mimecast North America Inc mimecast.com US US 4 Routes

AS Data

AS33538

AS33538 – Mimecast North America Inc

AS Number 33538
AS Name MIMECAST-CA
Organization Mimecast North America Inc(mna-95)
Country US
Website mimecast.com
Number of IPv4 Routes 2
Number of IPv6 Routes 2
ASN type BUSINESS
Registry ARIN
Date Allocated 2020-05-29

ASN Intelligence API for production workflows

Use ASN data for AS33538 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route # IPs
170.10.146.0/23 512
2620:134:6007::/48 ~1×10²⁴
2620:134:6006::/48 ~1×10²⁴
170.10.144.0/23 512

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       33538
ASName:         MIMECAST-CA
ASHandle:       AS33538
RegDate:        2020-05-29
Updated:        2020-05-29    
Ref:            https://rdap.arin.net/registry/autnum/33538



OrgName:        Mimecast North America Inc
OrgId:          MNA-95
Address:        191 Spring St
City:           Lexington
StateProv:      MA
PostalCode:     02421
Country:        US
RegDate:        2017-06-29
Updated:        2025-05-07
Ref:            https://rdap.arin.net/registry/entity/MNA-95


OrgTechHandle: DAVIS2734-ARIN
OrgTechName:   Davis, Brian 
OrgTechPhone:  +1-781-996-5340 
OrgTechEmail:  bdavis@mimecast.com
OrgTechRef:    https://rdap.arin.net/registry/entity/DAVIS2734-ARIN

OrgTechHandle: SEVCI-ARIN
OrgTechName:   Sevcik, Libor 
OrgTechPhone:  +1-781-795-5393 
OrgTechEmail:  lsevcik@mimecast.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SEVCI-ARIN

OrgNOCHandle: MIMEC-ARIN
OrgNOCName:   Mimecast
OrgNOCPhone:  +442078478700 
OrgNOCEmail:  cloudnetworking@mimecast.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/MIMEC-ARIN

OrgAbuseHandle: MIMEC1-ARIN
OrgAbuseName:   MIMEC-ABUSE
OrgAbusePhone:  +1-617-393-7050 
OrgAbuseEmail:  abuse@mimecast.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MIMEC1-ARIN

OrgTechHandle: MIMEC-ARIN
OrgTechName:   Mimecast
OrgTechPhone:  +442078478700 
OrgTechEmail:  cloudnetworking@mimecast.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MIMEC-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS3549 Level 3 Communications, Inc. (GBLX) US
AS2914 NTT America, Inc. US
AS3356 Level 3 Parent, LLC US
AS6461 Zayo Bandwidth US

Upstreams

AS Number Description Country
AS2914 NTT America, Inc. US
AS3356 Level 3 Parent, LLC US
AS6461 Zayo Bandwidth US

Contacts

Email Contacts

cloudnetworking@mimecast.com bdavis@mimecast.com lsevcik@mimecast.com

Abuse Contacts

abuse@mimecast.com

Legacy Routes

170.10.142.0/24 216.145.218.0/24 41.74.203.0/24 216.145.222.0/24

Ready to get started?Get Started with IP Intelligence API Today

Get Started
CTA Illustration

Frequently Asked Questions

ASN AS33538 is an Autonomous System Number used to identify a network for BGP internet routing.
AS33538 is listed under Mimecast North America Inc.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.