Report for 20437

Name

AS20437 - Nationwide Mutual Insurance Company, 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.

20437 AS20437 - Nationwide Mutual Insurance Company, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS701           UUNET - Verizon Business, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
30130 AS20437        ORIGIN  Originate:       1536 /21.42  Transit:          0 /0.00  AS20437 - Nationwide Mutual Insurance Company, 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       %
16070 AS20437       AS20437 - Nationwide Mutual Insurance Company      4      2      0      2      2  50.00%


  Prefix               AS Path                              Aggregation Suggestion
  155.188.0.0/23       4777 2516 701 20437    
  155.188.0.0/24       4777 2516 701 20437  - Withdrawn - matching aggregate 155.188.0.0/23 4777 2516 701 20437
  204.145.192.0/23     4777 2516 701 20437    
  204.145.192.0/24     4777 2516 701 20437  - Withdrawn - matching aggregate 204.145.192.0/23 4777 2516 701 20437

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

AS20437   2 More Specifics   4 Total Advertisements   AS20437 - Nationwide Mutual Insurance Company, US
    155.188.0.0/23                155.188.0.0/16
    155.188.0.0/24                155.188.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS20437 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS20437\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:       20437
             ASName:         AS20437
             ASHandle:       AS20437
             RegDate:        2001-05-08
             Updated:        2012-08-30
             Ref:            https://rdap.arin.net/registry/autnum/20437
             
             
             OrgName:        Nationwide Mutual Insurance Company
             OrgId:          NMI-20
             Address:        One Nationwide Plaza
             City:           Columbus
             StateProv:      OH
             PostalCode:     43215
             Country:        US
             RegDate:        2006-04-05
             Updated:        2025-08-01
             Ref:            https://rdap.arin.net/registry/entity/NMI-20
             
             
             OrgAbuseHandle: HO14-ORG-ARIN
             OrgAbuseName:   hostmaster
             OrgAbusePhone:  +1-614-249-6400 
             OrgAbuseEmail:  IPADMIN@nationwide.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/HO14-ORG-ARIN
             
             OrgTechHandle: HFG-ARIN
             OrgTechName:   Gasque, Hallie F
             OrgTechPhone:  +1-803-397-2931 
             OrgTechEmail:  gasquh1@nationwide.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/HFG-ARIN
             
             OrgTechHandle: HO14-ORG-ARIN
             OrgTechName:   hostmaster
             OrgTechPhone:  +1-614-249-6400 
             OrgTechEmail:  IPADMIN@nationwide.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/HO14-ORG-ARIN
             
             OrgNOCHandle: HO14-ORG-ARIN
             OrgNOCName:   hostmaster
             OrgNOCPhone:  +1-614-249-6400 
             OrgNOCEmail:  IPADMIN@nationwide.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/HO14-ORG-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.
             #