Report for 15258

Name

GBCO - Gilbane Building Company, 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.

15258 GBCO - Gilbane Building Company, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS15830         EQUINIX, NL
    AS22773         ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
44380 AS15258        ORIGIN  Originate:        768 /22.42  Transit:          0 /0.00  GBCO - Gilbane Building Company, 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       %
33443 AS15258       GBCO - Gilbane Building Company, US                3      0      0      3      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  204.90.12.0/24       4777 2516 3257 22773 15258   
  204.90.13.0/24       4777 2497 3257 15830 15258   
  204.90.14.0/24       4777 2516 3257 15830 15258   

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

AS15258   3 More Specifics   3 Total Advertisements   GBCO - Gilbane Building Company, US
    204.90.12.0/24                204.90.12.0/22
    204.90.13.0/24                204.90.12.0/22
    204.90.14.0/24                204.90.12.0/22

Whois Entry

whois: 402332

IANA has recorded AS15258 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS15258\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:       15258
             ASName:         GBCO
             ASHandle:       AS15258
             RegDate:        2009-01-13
             Updated:        2012-02-24
             Ref:            https://rdap.arin.net/registry/autnum/15258
             
             
             OrgName:        Gilbane Building Company
             OrgId:          GILBA-2
             Address:        7 Jackson Walkway
             City:           Providence
             StateProv:      RI
             PostalCode:     02903
             Country:        US
             RegDate:        2008-11-20
             Updated:        2024-09-30
             Ref:            https://rdap.arin.net/registry/entity/GILBA-2
             
             
             OrgTechHandle: WDA28-ARIN
             OrgTechName:   Dalton, Will 
             OrgTechPhone:  +1-401-456-5948 
             OrgTechEmail:  Networking-Team@gilbaneco.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/WDA28-ARIN
             
             OrgAbuseHandle: WDA28-ARIN
             OrgAbuseName:   Dalton, Will 
             OrgAbusePhone:  +1-401-456-5948 
             OrgAbuseEmail:  Networking-Team@gilbaneco.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/WDA28-ARIN
             
             OrgNOCHandle: WDA28-ARIN
             OrgNOCName:   Dalton, Will 
             OrgNOCPhone:  +1-401-456-5948 
             OrgNOCEmail:  Networking-Team@gilbaneco.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/WDA28-ARIN
             
             OrgTechHandle: OSOJN1-ARIN
             OrgTechName:   Osojnicki, Jen 
             OrgTechPhone:  +1-401-456-5544 
             OrgTechEmail:  josojnicki@gilbaneco.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/OSOJN1-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.
             #