Report for 64226

Name

MDURESOURCES - MDU Resources Group, 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.

64226 MDURESOURCES - MDU Resources Group, Inc., US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US
    AS26794         DCN-AS - Dakota Carrier Network, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1296  AS64226        ORIGIN  Originate:     199424 /14.39  Transit:          0 /0.00  MDURESOURCES - MDU Resources Group, 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       %
 5004 AS64226       MDURESOURCES - MDU Resources Group, Inc., US      18     14      4      8     10  55.56%


  Prefix               AS Path                              Aggregation Suggestion
  162.57.0.0/16        4777 6939 26794 64226   
  162.57.0.0/17        4777 6939 26794 64226 - Withdrawn - matching aggregate 162.57.0.0/16 4777 6939 26794 64226
  162.57.0.0/16        4777 2497 7018 64226 + Announce - aggregate of 162.57.0.0/17 (4777 2497 7018 64226) and 162.57.128.0/17 (4777 2497 7018 64226)
  162.57.0.0/18        4777 2497 7018 64226 - Withdrawn - aggregated with 162.57.64.0/18 (4777 2497 7018 64226)
  162.57.64.0/18       4777 2497 7018 64226 - Withdrawn - aggregated with 162.57.0.0/18 (4777 2497 7018 64226)
  162.57.128.0/17      4777 6939 26794 64226 - Withdrawn - matching aggregate 162.57.0.0/16 4777 6939 26794 64226
  162.57.128.0/18      4777 2497 7018 64226 - Withdrawn - aggregated with 162.57.192.0/18 (4777 2497 7018 64226)
  162.57.192.0/18      4777 2497 7018 64226 - Withdrawn - aggregated with 162.57.128.0/18 (4777 2497 7018 64226)
  162.57.232.0/24      4777 6939 26794 64226   
  162.57.235.0/24      4777 6939 26794 64226   
  162.57.236.0/22      4777 6939 26794 64226 + Announce - aggregate of 162.57.236.0/23 (4777 6939 26794 64226) and 162.57.238.0/23 (4777 6939 26794 64226)
  162.57.236.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.237.0/24 (4777 6939 26794 64226)
  162.57.237.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.236.0/24 (4777 6939 26794 64226)
  162.57.238.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.239.0/24 (4777 6939 26794 64226)
  162.57.239.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.238.0/24 (4777 6939 26794 64226)
  162.57.241.0/24      4777 6939 26794 64226   
  162.57.242.0/23      4777 6939 26794 64226 + Announce - aggregate of 162.57.242.0/24 (4777 6939 26794 64226) and 162.57.243.0/24 (4777 6939 26794 64226)
  162.57.242.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.243.0/24 (4777 6939 26794 64226)
  162.57.243.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.242.0/24 (4777 6939 26794 64226)
  162.57.244.0/23      4777 6939 26794 64226 + Announce - aggregate of 162.57.244.0/24 (4777 6939 26794 64226) and 162.57.245.0/24 (4777 6939 26794 64226)
  162.57.244.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.245.0/24 (4777 6939 26794 64226)
  162.57.245.0/24      4777 6939 26794 64226 - Withdrawn - aggregated with 162.57.244.0/24 (4777 6939 26794 64226)

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

AS64226   17 More Specifics   18 Total Advertisements   MDURESOURCES - MDU Resources Group, Inc., US
    162.57.0.0/17                 162.57.0.0/16
    162.57.0.0/18                 162.57.0.0/16
    162.57.64.0/18                162.57.0.0/16
    162.57.128.0/17               162.57.0.0/16
    162.57.128.0/18               162.57.0.0/16
    162.57.192.0/18               162.57.0.0/16
    162.57.232.0/24               162.57.0.0/16
    162.57.235.0/24               162.57.0.0/16
    162.57.236.0/24               162.57.0.0/16
    162.57.237.0/24               162.57.0.0/16
    162.57.238.0/24               162.57.0.0/16
    162.57.239.0/24               162.57.0.0/16
    162.57.241.0/24               162.57.0.0/16
    162.57.242.0/24               162.57.0.0/16
    162.57.243.0/24               162.57.0.0/16
    162.57.244.0/24               162.57.0.0/16
    162.57.245.0/24               162.57.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS64226 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS64226\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:       64226
             ASName:         MDURESOURCES
             ASHandle:       AS64226
             RegDate:        2015-10-06
             Updated:        2015-11-15
             Ref:            https://rdap.arin.net/registry/autnum/64226
             
             
             OrgName:        MDU Resources Group, Inc.
             OrgId:          MONTAN-2
             Address:        400 N. 4th Street
             City:           Bismarck
             StateProv:      ND
             PostalCode:     58501
             Country:        US
             RegDate:        1992-08-04
             Updated:        2015-10-23
             Ref:            https://rdap.arin.net/registry/entity/MONTAN-2
             
             
             OrgTechHandle: MARTI1030-ARIN
             OrgTechName:   Martin, Paul 
             OrgTechPhone:  +1-701-530-1720 
             OrgTechEmail:  paul.martin@mdu.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/MARTI1030-ARIN
             
             OrgAbuseHandle: MARTI1030-ARIN
             OrgAbuseName:   Martin, Paul 
             OrgAbusePhone:  +1-701-530-1720 
             OrgAbuseEmail:  paul.martin@mdu.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/MARTI1030-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.
             #