4237 CSC-IGN-FTW - Computer Sciences Corporation
Adjacency: 5 Upstream: 4 Downstream: 1
Upstream Adjacent AS list
AS17916 CSC-IGN-AUNZ-AP Computer Sciences Corporation
AS206 CSC-IGN-AMER - Computer Sciences Corporation
AS21877 CSC-USA - Computer Sciences Corporation
AS3360 CSC-ASN - Computer Sciences Corporation
Downstream Adjacent AS list
AS25784 CSC-IGN-AMER-HOU - Computer Sciences Corporation
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 4114 AS4237 ORG+TRN Originate: 26112 /17.33 Transit: 12288 /18.42 CSC-IGN-FTW - Computer Sciences Corporation
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 %
7122 AS4237 CSC-IGN-FTW - Computer Sciences Corporat 11 0 0 11 0 0.00%
Prefix AS Path Aggregation Suggestion
20.137.0.0/21 4637 3549 21877 {4237}
20.137.12.0/22 4637 3549 206 4237
20.137.16.0/22 4637 3549 3360 4237
20.137.28.0/22 4637 3549 206 4237
20.137.112.0/20 4637 3549 206 {4237}
20.137.144.0/20 4637 3549 206 {4237}
20.137.176.0/20 4637 3549 21877 4237
20.137.208.0/20 4637 3549 3360 {4237}
20.137.240.0/20 4637 3549 21877 {4237}
203.12.75.0/24 4637 1221 17916 4237
203.12.77.0/24 4637 1221 17916 4237
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS4237 11 More Specifics 11 Total Advertisements CSC-IGN-FTW - Computer Sciences Corporation
20.137.0.0/21 20.0.0.0/8
20.137.12.0/22 20.0.0.0/8
20.137.16.0/22 20.0.0.0/8
20.137.28.0/22 20.0.0.0/8
20.137.112.0/20 20.0.0.0/8
20.137.144.0/20 20.0.0.0/8
20.137.176.0/20 20.0.0.0/8
20.137.208.0/20 20.0.0.0/8
20.137.240.0/20 20.0.0.0/8
203.12.75.0/24 203.12.72.0/21
203.12.77.0/24 203.12.72.0/21
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/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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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.
#