Report for 30031

Name

MIMECAST-US - 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 AS2.0) 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.

30031 MIMECAST-US - Mimecast North America Inc, US

  Adjacency:     4  Upstream:     4  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461 - Zayo Bandwidth, US
    AS2914          NTT-DATA-2914 - NTT America, Inc., US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS12213         CNSQ-AS12213 - Centersquare, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
15594 AS30031        ORIGIN  Originate:       4864 /19.75  Transit:          0 /0.00  MIMECAST-US - Mimecast North America Inc, 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       %
10185 AS30031       MIMECAST-US - Mimecast North America Inc, US      17      8      4     13      4  23.53%


  Prefix               AS Path                              Aggregation Suggestion
  63.128.21.0/24       4777 2497 3356 30031   
  170.10.128.0/23      4777 2497 2914 30031   
  170.10.130.0/24      4777 2497 2914 30031   
  170.10.131.0/24      4777 2497 3356 30031   
  170.10.132.0/23      4777 2497 3356 30031   
  170.10.140.0/24      4777 2497 7018 12213 30031   
  170.10.150.0/23      4777 2497 3356 30031 + Announce - aggregate of 170.10.150.0/24 (4777 2497 3356 30031) and 170.10.151.0/24 (4777 2497 3356 30031)
  170.10.150.0/24      4777 2497 3356 30031 - Withdrawn - aggregated with 170.10.151.0/24 (4777 2497 3356 30031)
  170.10.151.0/24      4777 2497 3356 30031 - Withdrawn - aggregated with 170.10.150.0/24 (4777 2497 3356 30031)
  170.10.152.0/23      4777 2497 3356 30031 + Announce - aggregate of 170.10.152.0/24 (4777 2497 3356 30031) and 170.10.153.0/24 (4777 2497 3356 30031)
  170.10.152.0/24      4777 2497 3356 30031 - Withdrawn - aggregated with 170.10.153.0/24 (4777 2497 3356 30031)
  170.10.153.0/24      4777 2497 3356 30031 - Withdrawn - aggregated with 170.10.152.0/24 (4777 2497 3356 30031)
  170.10.156.0/23      4777 2497 3356 30031 + Announce - aggregate of 170.10.156.0/24 (4777 2497 3356 30031) and 170.10.157.0/24 (4777 2497 3356 30031)
  170.10.156.0/24      4777 2497 3356 30031 - Withdrawn - aggregated with 170.10.157.0/24 (4777 2497 3356 30031)
  170.10.157.0/24      4777 2497 3356 30031 - Withdrawn - aggregated with 170.10.156.0/24 (4777 2497 3356 30031)
  205.139.110.0/23     4777 2497 3356 30031 + Announce - aggregate of 205.139.110.0/24 (4777 2497 3356 30031) and 205.139.111.0/24 (4777 2497 3356 30031)
  205.139.110.0/24     4777 2497 3356 30031 - Withdrawn - aggregated with 205.139.111.0/24 (4777 2497 3356 30031)
  205.139.111.0/24     4777 2497 3356 30031 - Withdrawn - aggregated with 205.139.110.0/24 (4777 2497 3356 30031)
  207.211.30.0/24      4777 2497 2914 30031   
  216.145.219.0/24     4777 2497 2914 30031   
  216.205.24.0/24      4777 2497 2914 30031   

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

AS30031   17 More Specifics   17 Total Advertisements   MIMECAST-US - Mimecast North America Inc, US
    63.128.21.0/24                63.128.0.0/15
    170.10.128.0/23               170.10.128.0/19
    170.10.130.0/24               170.10.128.0/19
    170.10.131.0/24               170.10.128.0/19
    170.10.132.0/23               170.10.128.0/19
    170.10.140.0/24               170.10.128.0/19
    170.10.150.0/24               170.10.128.0/19
    170.10.151.0/24               170.10.128.0/19
    170.10.152.0/24               170.10.128.0/19
    170.10.153.0/24               170.10.128.0/19
    170.10.156.0/24               170.10.128.0/19
    170.10.157.0/24               170.10.128.0/19
    205.139.110.0/24              205.138.0.0/15
    205.139.111.0/24              205.138.0.0/15
    207.211.30.0/24               207.211.30.0/23
    216.145.219.0/24              216.145.208.0/20
    216.205.24.0/24               216.205.24.0/21
    170.10.142.0/24               170.10.128.0/19
    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.

    - 170.10.142.0/24             Withdrawn
    - 216.145.218.0/24            Withdrawn
    - 216.145.222.0/24            Withdrawn

Whois Entry

whois: 402332

IANA has recorded AS30031 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS30031\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:       30031
             ASName:         MIMECAST-US
             ASHandle:       AS30031
             RegDate:        2017-07-07
             Updated:        2017-07-07
             Ref:            https://rdap.arin.net/registry/autnum/30031
             
             
             
             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
             
             
             OrgAbuseHandle: MIMEC1-ARIN
             OrgAbuseName:   MIMEC-ABUSE
             OrgAbusePhone:  +1-617-393-7050 
             OrgAbuseEmail:  abuse@mimecast.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/MIMEC1-ARIN
             
             OrgNOCHandle: MIMEC-ARIN
             OrgNOCName:   Mimecast
             OrgNOCPhone:  +442078478700 
             OrgNOCEmail:  cloudnetworking@mimecast.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/MIMEC-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
             
             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: 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.
             #