Report for 33538

Name

MIMECAST-CA - Mimecast North America Inc, US

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS6447) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

33538 MIMECAST-CA, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461, US
    AS2914          NTT-LTD-2914, US
    AS3356          LEVEL3, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
36102 AS33538        ORIGIN  Originate:       1024 /22.00  Transit:          0 /0.00  MIMECAST-CA, US

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
40256 AS33538       MIMECAST-CA, US                                    2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  170.10.144.0/23      2914 33538             
  170.10.146.0/23      57866 3356 33538       

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS33538   7 More Specifics   7 Total Advertisements   MIMECAST-CA, US
    41.74.203.0/24                41.74.192.0/20
    170.10.142.0/24               170.10.128.0/19
    170.10.144.0/23               170.10.128.0/19
    170.10.146.0/23               170.10.128.0/19
    216.145.216.0/24              216.145.208.0/20
    216.145.218.0/24              216.145.208.0/20
    216.145.222.0/24              216.145.208.0/20

Prefixes added and withdrawn by this origin AS in the past 7 days.

    + 41.74.203.0/24              Announced
    + 170.10.142.0/24             Announced
    + 216.145.216.0/24            Announced
    + 216.145.218.0/24            Announced
    + 216.145.222.0/24            Announced

Whois Entry

whois: 402603

IANA has recorded AS33538 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33538\n             
             #
             # 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
             
             
             OrgNOCHandle: MIMEC-ARIN
             OrgNOCName:   Mimecast
             OrgNOCPhone:  +442078478700 
             OrgNOCEmail:  cloudnetworking@mimecast.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/MIMEC-ARIN
             
             OrgTechHandle: MIMEC-ARIN
             OrgTechName:   Mimecast
             OrgTechPhone:  +442078478700 
             OrgTechEmail:  cloudnetworking@mimecast.com
             OrgTechRef:    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: SEVCI-ARIN
             OrgTechName:   Sevcik, Libor 
             OrgTechPhone:  +1-781-795-5393 
             OrgTechEmail:  lsevcik@mimecast.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SEVCI-ARIN
             
             OrgTechHandle: DAVIS2734-ARIN
             OrgTechName:   Davis, Brian 
             OrgTechPhone:  +1-781-996-5340 
             OrgTechEmail:  bdavis@mimecast.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/DAVIS2734-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.
             #