Report for 21896

Name

ALLIANT-ENERGY - Alliant Energy, 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.

21896 ALLIANT-ENERGY - Alliant Energy, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS393238        IMONC - ImOn Communications, LLC, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS4181          TDS-AS - TDS TELECOM, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
16836 AS21896        ORIGIN  Originate:       4096 /20.00  Transit:          0 /0.00  ALLIANT-ENERGY - Alliant Energy, 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       %
21425 AS21896       ALLIANT-ENERGY - Alliant Energy, US                8      2      1      7      1  12.50%


  Prefix               AS Path                              Aggregation Suggestion
  198.7.38.0/23        4608 7575 4181 21896   
  198.7.42.0/23        4608 7575 4181 21896   
  198.7.44.0/22        4608 7575 4181 21896 + Announce - aggregate of 198.7.44.0/23 (4608 7575 4181 21896) and 198.7.46.0/23 (4608 7575 4181 21896)
  198.7.44.0/23        4608 7575 4181 21896 - Withdrawn - aggregated with 198.7.46.0/23 (4608 7575 4181 21896)
  198.7.46.0/23        4608 7575 4181 21896 - Withdrawn - aggregated with 198.7.44.0/23 (4608 7575 4181 21896)
  207.71.128.0/23      4777 2497 3356 21896   
  207.71.134.0/23      4777 2497 3356 21896   
  207.71.136.0/23      4777 2497 3356 21896   
  207.71.142.0/23      4777 2497 3356 21896   

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

AS21896   8 More Specifics   8 Total Advertisements   ALLIANT-ENERGY - Alliant Energy, US
    198.7.38.0/23                 198.7.32.0/20
    198.7.42.0/23                 198.7.32.0/20
    198.7.44.0/23                 198.7.32.0/20
    198.7.46.0/23                 198.7.32.0/20
    207.71.128.0/23               207.71.128.0/19
    207.71.134.0/23               207.71.128.0/19
    207.71.136.0/23               207.71.128.0/19
    207.71.142.0/23               207.71.128.0/19

Whois Entry

whois: 402628

IANA has recorded AS21896 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21896\n