Report for 18729

Name

SHAWMUT - Shawmut Design & Construction, 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.

18729 SHAWMUT - Shawmut Design & Construction, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS46887         CROWNCASTLE-AS46887 - Crown Castle Fiber LLC, US
    AS7015          COMCAST-7015 - Comcast Cable Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
48417 AS18729        ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  SHAWMUT - Shawmut Design & Construction, 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       %
34466 AS18729       SHAWMUT - Shawmut Design & Construction, US        2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  50.236.28.0/24       4777 2516 7922 7015 18729   
  64.214.98.0/24       4777 2516 7922 7015 18729   

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

AS18729   2 More Specifics   2 Total Advertisements   SHAWMUT - Shawmut Design & Construction, US
    50.236.28.0/24                50.128.0.0/9
    64.214.98.0/24                64.214.64.0/18

Whois Entry

whois: 402332

IANA has recorded AS18729 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS18729\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:       18729
             ASName:         SHAWMUT
             ASHandle:       AS18729
             RegDate:        2000-10-03
             Updated:        2012-03-20
             Ref:            https://rdap.arin.net/registry/autnum/18729
             
             
             OrgName:        Shawmut Design & Construction
             OrgId:          SDC-68
             Address:        560 Harrison Avenue
             City:           Boston
             StateProv:      MA
             PostalCode:     02118
             Country:        US
             RegDate:        2000-10-03
             Updated:        2012-10-10
             Ref:            https://rdap.arin.net/registry/entity/SDC-68
             
             
             OrgTechHandle: CR448-ARIN
             OrgTechName:   Ryan, Chris 
             OrgTechPhone:  +1-617-622-7000 
             OrgTechEmail:  cryan@shawmut.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/CR448-ARIN
             
             OrgAbuseHandle: CR448-ARIN
             OrgAbuseName:   Ryan, Chris 
             OrgAbusePhone:  +1-617-622-7000 
             OrgAbuseEmail:  cryan@shawmut.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/CR448-ARIN
             
             RTechHandle: CR448-ARIN
             RTechName:   Ryan, Chris 
             RTechPhone:  +1-617-622-7000 
             RTechEmail:  cryan@shawmut.com
             RTechRef:    https://rdap.arin.net/registry/entity/CR448-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.
             #