Report for 10493

Name

GCN-AS - Grand Central Networks 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.

10493 GCN-AS - Grand Central Networks Inc., US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS23352         SERVERCENTRAL - DEFT.COM, US
    AS12213         CNSQ-AS12213 - Centersquare, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
30306 AS10493        ORIGIN  Originate:       1536 /21.42  Transit:          0 /0.00  GCN-AS - Grand Central Networks 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       %
20934 AS10493       GCN-AS - Grand Central Networks Inc., US           6      2      1      5      1  16.67%


  Prefix               AS Path                              Aggregation Suggestion
  50.31.163.0/24       4777 2516 3257 23352 10493   
  74.201.43.0/24       4777 2516 3257 23352 10493   
  172.81.88.0/24       4777 2516 3356 12213 10493   
  172.81.89.0/24       4777 2516 3257 23352 10493   
  172.81.90.0/23       4777 2516 3257 23352 10493 + Announce - aggregate of 172.81.90.0/24 (4777 2516 3257 23352 10493) and 172.81.91.0/24 (4777 2516 3257 23352 10493)
  172.81.90.0/24       4777 2516 3257 23352 10493 - Withdrawn - aggregated with 172.81.91.0/24 (4777 2516 3257 23352 10493)
  172.81.91.0/24       4777 2516 3257 23352 10493 - Withdrawn - aggregated with 172.81.90.0/24 (4777 2516 3257 23352 10493)

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

AS10493   6 More Specifics   6 Total Advertisements   GCN-AS - Grand Central Networks Inc., US
    50.31.163.0/24                50.31.128.0/17
    74.201.43.0/24                74.201.40.0/21
    172.81.88.0/24                172.81.88.0/22
    172.81.89.0/24                172.81.88.0/22
    172.81.90.0/24                172.81.88.0/22
    172.81.91.0/24                172.81.88.0/22

Whois Entry

whois: 402332

IANA has recorded AS10493 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS10493\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:       10493
             ASName:         GCN-AS
             ASHandle:       AS10493
             RegDate:        1997-08-27
             Updated:        1997-08-27
             Ref:            https://rdap.arin.net/registry/autnum/10493
             
             
             OrgName:        Grand Central Networks Inc.
             OrgId:          GCN-13
             Address:        194 Main Street, 2NW
             City:           Norwalk
             StateProv:      CT
             PostalCode:     06851
             Country:        US
             RegDate:        1997-08-27
             Updated:        2015-05-12
             Ref:            https://rdap.arin.net/registry/entity/GCN-13
             
             
             OrgTechHandle: SF509-ARIN
             OrgTechName:   Fulton, Sean 
             OrgTechPhone:  +1-203-665-6211 
             OrgTechEmail:  sean@gcnpublishing.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SF509-ARIN
             
             OrgAbuseHandle: SF509-ARIN
             OrgAbuseName:   Fulton, Sean 
             OrgAbusePhone:  +1-203-665-6211 
             OrgAbuseEmail:  sean@gcnpublishing.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/SF509-ARIN
             
             RTechHandle: SF509-ARIN
             RTechName:   Fulton, Sean 
             RTechPhone:  +1-203-665-6211 
             RTechEmail:  sean@gcnpublishing.com
             RTechRef:    https://rdap.arin.net/registry/entity/SF509-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.
             #