Report for 1789

Name

COGENT-1789 - Cogent Communications, LLC, 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 AS4637) 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.

1789 SPRINTLINK1 - Sprint Government Systems Division

  Adjacency:     2  Upstream:     1  Downstream:     1
  Upstream Adjacent AS list
    AS1239    SPRINTLINK - Sprint
  Downstream Adjacent AS list
    AS3648    SPRINT-BB3 - Sprint

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
11051 AS1789   ORG+TRN Originate:       3328 /20.30  Transit:      17664 /17.89 SPRINTLINK1 - Sprint Government Systems Division

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       %
 3489 AS1789  SPRINTLINK1 - Sprint Government Systems      13      4      2     11      2  15.38%


  Prefix               AS Path                              Aggregation Suggestion
  199.0.13.0/24        4637 3491 3561 1239 1789   
  199.0.52.0/24        4637 3491 3561 1239 1789   
  199.0.55.0/24        4637 3491 3561 1239 1789   
  199.0.67.0/24        4637 3491 3561 1239 1789   
  199.0.145.0/24       4637 3491 3561 1239 1789   
  199.0.158.0/23       4637 3491 3561 1239 1789 + Announce - aggregate of 199.0.158.0/24 (4637 3491 3561 1239 1789) and 199.0.159.0/24 (4637 3491 3561 1239 1789)
  199.0.158.0/24       4637 3491 3561 1239 1789 - Withdrawn - aggregated with 199.0.159.0/24 (4637 3491 3561 1239 1789)
  199.0.159.0/24       4637 3491 3561 1239 1789 - Withdrawn - aggregated with 199.0.158.0/24 (4637 3491 3561 1239 1789)
  199.0.233.0/24       4637 3491 3561 1239 1789   
  199.0.234.0/24       4637 3491 3561 1239 1789   
  199.3.190.0/24       4637 3491 3561 1239 1789   
  208.0.2.0/23         4637 3491 3561 1239 1789 + Announce - aggregate of 208.0.2.0/24 (4637 3491 3561 1239 1789) and 208.0.3.0/24 (4637 3491 3561 1239 1789)
  208.0.2.0/24         4637 3491 3561 1239 1789 - Withdrawn - aggregated with 208.0.3.0/24 (4637 3491 3561 1239 1789)
  208.0.3.0/24         4637 3491 3561 1239 1789 - Withdrawn - aggregated with 208.0.2.0/24 (4637 3491 3561 1239 1789)
  208.0.4.0/24         4637 3491 3561 1239 1789   

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

AS1789   13 More Specifics   13 Total Advertisements   SPRINTLINK1 - Sprint Government Systems Division
    199.0.13.0/24                 199.0.0.0/14
    199.0.52.0/24                 199.0.0.0/14
    199.0.55.0/24                 199.0.0.0/14
    199.0.67.0/24                 199.0.0.0/14
    199.0.145.0/24                199.0.0.0/14
    199.0.158.0/24                199.0.0.0/14
    199.0.159.0/24                199.0.0.0/14
    199.0.233.0/24                199.0.0.0/14
    199.0.234.0/24                199.0.0.0/14
    199.3.190.0/24                199.0.0.0/14
    208.0.2.0/24                  208.0.0.0/11
    208.0.3.0/24                  208.0.0.0/11
    208.0.4.0/24                  208.0.0.0/11

Whois Entry

whois: 402603

IANA has recorded AS1789 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS1789\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:       1789
             ASName:         COGENT-1789
             ASHandle:       AS1789
             RegDate:        1992-07-07
             Updated:        2025-12-23
             Ref:            https://rdap.arin.net/registry/autnum/1789
             
             
             
             OrgName:        Cogent Communications, LLC
             OrgId:          COGC
             Address:        2450 N Street NW
             City:           Washington
             StateProv:      DC
             PostalCode:     20037
             Country:        US
             RegDate:        2000-05-30
             Updated:        2025-09-23
             Comment:        Geofeed https://geofeed.cogentco.com/geofeed.csv
             Ref:            https://rdap.arin.net/registry/entity/COGC
             
             ReferralServer:  rwhois://rwhois.cogentco.com:4321
             
             OrgAbuseHandle: COGEN-ARIN
             OrgAbuseName:   Cogent Abuse
             OrgAbusePhone:  +1-877-875-4311 
             OrgAbuseEmail:  abuse@cogentco.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/COGEN-ARIN
             
             OrgNOCHandle: ZC108-ARIN
             OrgNOCName:   Cogent Communications
             OrgNOCPhone:  +1-877-875-4311 
             OrgNOCEmail:  noc@cogentco.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/ZC108-ARIN
             
             OrgTechHandle: IPALL-ARIN
             OrgTechName:   IP Allocation
             OrgTechPhone:  +1-877-875-4311 
             OrgTechEmail:  ipalloc@cogentco.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/IPALL-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.
             #
             
             
             
             Found a referral to rwhois.cogentco.com:4321.
             
             %rwhois V-1.5:0010b0:00 rwhois.cogentco.com (CGNT rwhoisd 1.2.2)
             %error 230 No objects found