Report for 21794

Name

AMEREN-AS2 - Ameren Corp., 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.

21794 AMEREN-AS2 - Ameren Corp., US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS40264         TWC-40264-WI-MN-UPPERMI-C3 - Charter Communications LLC, US
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
48626 AS21794        ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  AMEREN-AS2 - Ameren Corp., 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       %
21678 AS21794       AMEREN-AS2 - Ameren Corp., US                      2      2      1      1      1  50.00%


  Prefix               AS Path                              Aggregation Suggestion
  192.189.96.0/23      4777 2497 7018 21794 + Announce - aggregate of 192.189.96.0/24 (4777 2497 7018 21794) and 192.189.97.0/24 (4777 2497 7018 21794)
  192.189.96.0/24      4777 2497 7018 21794 - Withdrawn - aggregated with 192.189.97.0/24 (4777 2497 7018 21794)
  192.189.97.0/24      4777 2497 7018 21794 - Withdrawn - aggregated with 192.189.96.0/24 (4777 2497 7018 21794)

Whois Entry

whois: 402332

IANA has recorded AS21794 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21794\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:       21794
             ASName:         AMEREN-AS2
             ASHandle:       AS21794
             RegDate:        2001-06-21
             Updated:        2012-03-20
             Ref:            https://rdap.arin.net/registry/autnum/21794
             
             
             OrgName:        Ameren Corp.
             OrgId:          AMEREN-2
             Address:        1901 Chouteau Ave.
             City:           St. Louis
             StateProv:      MO
             PostalCode:     63103
             Country:        US
             RegDate:        2002-02-21
             Updated:        2013-02-06
             Ref:            https://rdap.arin.net/registry/entity/AMEREN-2
             
             
             OrgAbuseHandle: NOC2020-ARIN
             OrgAbuseName:   Network Operations Center
             OrgAbusePhone:  +1-314-206-0662 
             OrgAbuseEmail:  noc@ameren.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NOC2020-ARIN
             
             OrgTechHandle: AIR5-ARIN
             OrgTechName:   Ameren Internet Registry
             OrgTechPhone:  +1-314-554-3883 
             OrgTechEmail:  arin@ameren.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/AIR5-ARIN
             
             OrgAbuseHandle: AIR5-ARIN
             OrgAbuseName:   Ameren Internet Registry
             OrgAbusePhone:  +1-314-554-3883 
             OrgAbuseEmail:  arin@ameren.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/AIR5-ARIN
             
             OrgNOCHandle: NOC2020-ARIN
             OrgNOCName:   Network Operations Center
             OrgNOCPhone:  +1-314-206-0662 
             OrgNOCEmail:  noc@ameren.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC2020-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.
             #