Report for 4237

Name

CSC-IGN-FTW-AS4237 - DXC US Latin America Corporation, 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.

4237 CSC-IGN-FTW-AS4237 - DXC US Latin America Corporation, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS3360          DXC-AS3360 - DXC US Latin America Corporation, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
4287  AS4237         ORIGIN  Originate:      51200 /16.36  Transit:          0 /0.00  CSC-IGN-FTW-AS4237 - DXC US Latin America Corporation, 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       %
12008 AS4237        CSC-IGN-FTW-AS4237 - DXC US Latin America Cor     13      4      1     10      3  23.08%


  Prefix               AS Path                              Aggregation Suggestion
  20.137.0.0/21        4777 2516 3356 3360 3360 4237   
  20.137.12.0/22       4608 7575 1299 46887 3360 3360 4237   
  20.137.14.0/23       4608 7575 1299 46887 3360 3360 4237 - Withdrawn - matching aggregate 20.137.12.0/22 4608 7575 1299 46887 3360 3360 4237
  20.137.176.0/20      4777 2516 3356 3360 3360 4237   
  20.137.176.0/21      4777 2516 3356 3360 3360 4237 - Withdrawn - matching aggregate 20.137.176.0/20 4777 2516 3356 3360 3360 4237
  20.137.216.0/24      4777 2516 3356 3360 3360 4237   
  20.137.240.0/20      4777 2516 3356 3360 3360 4237   
  20.148.32.0/19       4777 2516 3356 3360 3360 4237   
  20.148.96.0/19       4777 2516 3356 3360 3360 4237   
  20.148.128.0/18      4777 2516 3356 3360 3360 4237 + Announce - aggregate of 20.148.128.0/19 (4777 2516 3356 3360 3360 4237) and 20.148.160.0/19 (4777 2516 3356 3360 3360 4237)
  20.148.128.0/19      4777 2516 3356 3360 3360 4237 - Withdrawn - aggregated with 20.148.160.0/19 (4777 2516 3356 3360 3360 4237)
  20.148.160.0/19      4777 2516 3356 3360 3360 4237 - Withdrawn - aggregated with 20.148.128.0/19 (4777 2516 3356 3360 3360 4237)
  20.148.240.0/20      4608 7575 1299 46887 3360 3360 4237   
  20.156.169.0/24      4608 7575 3356 3360 3360 4237   

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

AS4237   13 More Specifics   13 Total Advertisements   CSC-IGN-FTW-AS4237 - DXC US Latin America Corporation, US
    20.137.0.0/21                 20.137.0.0/16
    20.137.12.0/22                20.137.0.0/16
    20.137.14.0/23                20.137.0.0/16
    20.137.176.0/20               20.137.0.0/16
    20.137.176.0/21               20.137.0.0/16
    20.137.216.0/24               20.137.0.0/16
    20.137.240.0/20               20.137.0.0/16
    20.148.32.0/19                20.148.0.0/15
    20.148.96.0/19                20.148.0.0/15
    20.148.128.0/19               20.148.0.0/15
    20.148.160.0/19               20.148.0.0/15
    20.148.240.0/20               20.148.0.0/15
    20.156.169.0/24               20.156.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS4237 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS4237\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:       4237
             ASName:         CSC-IGN-FTW-AS4237
             ASHandle:       AS4237
             RegDate:        1999-06-25
             Updated:        2021-12-13
             Ref:            https://rdap.arin.net/registry/autnum/4237
             
             
             OrgName:        DXC US Latin America Corporation
             OrgId:          ESLAC
             Address:        20408 Bashan Dr
             City:           Ashburn
             StateProv:      VA
             PostalCode:     20147
             Country:        US
             RegDate:        2018-05-17
             Updated:        2023-09-20
             Ref:            https://rdap.arin.net/registry/entity/ESLAC
             
             
             OrgAbuseHandle: DSIRCC-ARIN
             OrgAbuseName:   DXC Security Incident Response Control Centre
             OrgAbusePhone:  +1-703-245-9675 
             OrgAbuseEmail:  abuse@dxc.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DSIRCC-ARIN
             
             OrgNOCHandle: ESIPA-ARIN
             OrgNOCName:   ES IPADDR
             OrgNOCPhone:  +1-800-524-7638 
             OrgNOCEmail:  ipaddr@dxc.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/ESIPA-ARIN
             
             OrgTechHandle: ESIPA-ARIN
             OrgTechName:   ES IPADDR
             OrgTechPhone:  +1-800-524-7638 
             OrgTechEmail:  ipaddr@dxc.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ESIPA-ARIN
             
             OrgDNSHandle: ESIPA-ARIN
             OrgDNSName:   ES IPADDR
             OrgDNSPhone:  +1-800-524-7638 
             OrgDNSEmail:  ipaddr@dxc.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/ESIPA-ARIN
             
             OrgRoutingHandle: ESIPA-ARIN
             OrgRoutingName:   ES IPADDR
             OrgRoutingPhone:  +1-800-524-7638 
             OrgRoutingEmail:  ipaddr@dxc.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/ESIPA-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.
             #