Report for 20004

Name

MISO - Midcontinent Independent System Operator, 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 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.

20004 MISO - Midwest Independent Transmission Systems Operator, Inc.

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS4323    TWTC - Time Warner Telecom, Inc.

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
5600  AS20004  ORIGIN  Originate:      12800 /18.36  Transit:          0 /0.00  MISO - Midwest Independent Transmission Systems Operator, Inc.

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       %
 3900 AS20004 MISO - Midwest Independent Transmission       5      2      0      3      2  40.00%


  Prefix               AS Path                              Aggregation Suggestion
  12.109.71.0/24       4637 4323 20004        
  148.142.64.0/19      4637 4323 20004        
  148.142.64.0/21      4637 4323 20004      - Withdrawn - matching aggregate 148.142.64.0/19 4637 4323 20004
  148.142.72.0/21      4637 4323 20004      - Withdrawn - matching aggregate 148.142.64.0/19 4637 4323 20004
  148.142.96.0/24      4637 4323 20004        

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

AS20004   5 More Specifics   5 Total Advertisements   MISO - Midwest Independent Transmission Systems Operator, Inc.
    12.109.71.0/24                12.0.0.0/8
    148.142.64.0/19               148.142.0.0/16
    148.142.64.0/21               148.142.0.0/16
    148.142.72.0/21               148.142.0.0/16
    148.142.96.0/24               148.142.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS20004 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS20004\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/
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             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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             ASNumber:       20004
             ASName:         MISO
             ASHandle:       AS20004
             RegDate:        2001-03-13
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/20004
             
             
             OrgName:        Midcontinent Independent System Operator, Inc.
             OrgId:          MISO-2
             Address:        701 City Center Drive
             City:           Carmel
             StateProv:      IN
             PostalCode:     46032
             Country:        US
             RegDate:        
             Updated:        2016-03-29
             Ref:            https://rdap.arin.net/registry/entity/MISO-2
             
             
             OrgAbuseHandle: NETWO969-ARIN
             OrgAbuseName:   Network
             OrgAbusePhone:  +1-317-249-5555 
             OrgAbuseEmail:  networking@misoenergy.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO969-ARIN
             
             OrgTechHandle: NETWO969-ARIN
             OrgTechName:   Network
             OrgTechPhone:  +1-317-249-5555 
             OrgTechEmail:  networking@misoenergy.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO969-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.
             #