Whois Lookup

Query registration info, expiration date, registrar and more for domain, IP or ASN

Example： google.com · baidu.com · github.com · 8.8.8.8 · 211.234.110.0/24 · AS13335
Registration Info
205.240.0.0/13
IP Range
205.240.0.0 - 205.240.15.255
CIDR
205.240.0.0/20
Network Name
SPRINT-CDF00F
Organization
Computer Systems Design Company (CSD)
Country/Region
US
Abuse Contact
[email protected]
Registration Date
1995-04-25
Update Date
2014-08-18
Registrant
Computer Systems Design Company (CSD)
Domain Status
Reallocated
Raw Whois Data
#
# 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.
#



# start

NetRange:       205.240.0.0 - 205.247.255.255
CIDR:           205.240.0.0/13
NetName:        COGENT-205-240-0
NetHandle:      NET-205-240-0-0-1
Parent:         NET205 (NET-205-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Cogent Communications, LLC (COGC)
RegDate:        1995-04-24
Updated:        2025-12-23
Ref:            https://rdap.arin.net/registry/ip/205.240.0.0



OrgName:        Cogent Communications, LLC
OrgId:          COGC
Address:        2450 N Street NW
City:           Washington
StateProv:      DC
PostalCode:     20037
Country:        US
RegDate:        2000-05-30
Updated:        2025-09-23
Comment:        Geofeed https://geofeed.cogentco.com/geofeed.csv
Ref:            https://rdap.arin.net/registry/entity/COGC

ReferralServer:  rwhois://rwhois.cogentco.com:4321

OrgTechHandle: IPALL-ARIN
OrgTechName:   IP Allocation
OrgTechPhone:  +1-877-875-4311 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/IPALL-ARIN

OrgAbuseHandle: COGEN-ARIN
OrgAbuseName:   Cogent Abuse
OrgAbusePhone:  +1-877-875-4311 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/COGEN-ARIN

OrgNOCHandle: ZC108-ARIN
OrgNOCName:   Cogent Communications
OrgNOCPhone:  +1-877-875-4311 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/ZC108-ARIN

# end


# start

NetRange:       205.240.0.0 - 205.240.15.255
CIDR:           205.240.0.0/20
NetName:        SPRINT-CDF00F
NetHandle:      NET-205-240-0-0-2
Parent:         COGENT-205-240-0 (NET-205-240-0-0-1)
NetType:        Reallocated
OriginAS:       
Organization:   Computer Systems Design Company (CSD)
RegDate:        1995-04-25
Updated:        2014-08-18
Ref:            https://rdap.arin.net/registry/ip/205.240.0.0


OrgName:        Computer Systems Design Company
OrgId:          CSD
Address:        735 Highland Avenue
City:           Boulder
StateProv:      CO
PostalCode:     80302
Country:        US
RegDate:        1994-12-20
Updated:        2024-11-04
Ref:            https://rdap.arin.net/registry/entity/CSD


OrgNOCHandle: JN20-ARIN
OrgNOCName:   Nebel, John 
OrgNOCPhone:  +1-303-618-7345 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/JN20-ARIN

OrgAbuseHandle: JN20-ARIN
OrgAbuseName:   Nebel, John 
OrgAbusePhone:  +1-303-618-7345 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/JN20-ARIN

OrgTechHandle: JN24-ARIN
OrgTechName:   Nebel, John 
OrgTechPhone:  +1-303-618-7345 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/JN24-ARIN

RAbuseHandle: JN24-ARIN
RAbuseName:   Nebel, John 
RAbusePhone:  +1-303-618-7345 
RAbuseEmail:  [email protected]
RAbuseRef:    https://rdap.arin.net/registry/entity/JN24-ARIN

# end



#
# 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.
#