This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS20458 4 More Specifics 4 Total Advertisements ASN1, US
50.236.234.0/24 50.128.0.0/9
207.106.192.0/24 207.106.0.0/16
216.204.147.0/24 216.204.0.0/16
216.204.148.0/24 216.204.0.0/16
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 50.236.234.0/24 Announced
+ 207.106.192.0/24 Announced
+ 216.204.147.0/24 Announced
+ 216.204.148.0/24 Announced
whois: 402609
IANA has recorded AS20458 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS20458\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: 20458
ASName: ASN1
ASHandle: AS20458
RegDate: 2009-01-06
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/20458
OrgName: CAS Severn
OrgId: CASSE-3
Address: 6201 Chevy Chase Drive
City: Laurel
StateProv: MD
PostalCode: 20707
Country: US
RegDate: 2008-10-30
Updated: 2018-05-03
Ref: https://rdap.arin.net/registry/entity/CASSE-3
OrgAbuseHandle: JHB61-ARIN
OrgAbuseName: Blanchette, John Howard
OrgAbusePhone: +1-301-776-3444
OrgAbuseEmail: jblanchette@cassevern.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/JHB61-ARIN
OrgAbuseHandle: JPZ2-ARIN
OrgAbuseName: Zirkle, Jonathan Paul
OrgAbusePhone: +1-301-776-3400
OrgAbuseEmail: jzirkle@cassevern.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/JPZ2-ARIN
OrgTechHandle: JPZ2-ARIN
OrgTechName: Zirkle, Jonathan Paul
OrgTechPhone: +1-301-776-3400
OrgTechEmail: jzirkle@cassevern.com
OrgTechRef: https://rdap.arin.net/registry/entity/JPZ2-ARIN
OrgTechHandle: JAF20-ARIN
OrgTechName: Frentheway, Jon Alan
OrgTechPhone: +1-301-776-3400
OrgTechEmail: jfrentheway@cassevern.com
OrgTechRef: https://rdap.arin.net/registry/entity/JAF20-ARIN
OrgNOCHandle: JPZ2-ARIN
OrgNOCName: Zirkle, Jonathan Paul
OrgNOCPhone: +1-301-776-3400
OrgNOCEmail: jzirkle@cassevern.com
OrgNOCRef: https://rdap.arin.net/registry/entity/JPZ2-ARIN
OrgNOCHandle: JHB61-ARIN
OrgNOCName: Blanchette, John Howard
OrgNOCPhone: +1-301-776-3444
OrgNOCEmail: jblanchette@cassevern.com
OrgNOCRef: https://rdap.arin.net/registry/entity/JHB61-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.
#