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Home -> IPv4 root -> 172/8 -> 172.0.0.0/8

Summary for subnet 172.0.0.0/8

IP-range/subnet172.0.0.0-172.255.255.255
DescriptionAdministered by ARIN
LocationUnited States (US) flag
Registryarin
Number of domains hosted112,224
Number of nameservers hosted3,319
Number of mailservers hosted7,201
Number of SPAM hosts hosted899
Number of IP routes526

Subnets based on RIR allocations

SubnetDescriptionRIRCountry#routes#domains#spamhosts
172.0.0.0/12AT&T Internet ServicesarinUS11,04934
172.32.0.0/11T-Mobile USA, Inc.arinUS755329
172.128.0.0/10AOL Inc.arinUS61730
172.192.0.0/13FOXTEL Management Pty LtdapnicAU140
172.200.0.0/13AOL Inc.arinUS8200
172.208.0.0/13AOL Inc.arinUS630
172.216.0.0/16AOL Inc.arinUS000
172.217.0.0/16Google Inc.arinUS100
172.218.0.0/15TELUS Communications Inc.arinCA2171
172.220.0.0/14BRIGHT HOUSE NETWORKS, LLCarinUS1100
172.224.0.0/12Akamai Technologies, Inc.arinUS2521,5320
172.240.0.0/15Nobis Technology Group, LLCarinUS4620,8392
172.242.0.0/15Viasat Communications Inc.arinUS3533103
172.244.0.0/16Comcast Cable Communications, LLCarinUS100
172.245.0.0/16ColoCrossingarinUS2410,243162
172.246.0.0/16Enzu IncarinUS1337,50123
172.247.0.0/16CloudRadium L.L.CarinUS2824,7450
172.248.0.0/14Time Warner Cable Internet LLCarinUS1247230
172.252.0.0/16EGIHostingarinUS25,1920
172.253.0.0/16Google Inc.arinUS100
172.254.0.0/16Time Warner Cable Internet LLCarinUS11814
172.255.0.0/16Nobis Technology Group, LLCarinUS238,7420

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Whois information

NetRange:       172.0.0.0 - 172.255.255.255
CIDR:           172.0.0.0/8
OriginAS:       
NetName:        NET172
NetHandle:      NET-172-0-0-0-0
Parent:         
NetType:        Early Registrations, Maintained by ARIN
RegDate:        1993-05-01
Updated:        2010-06-30
Ref:            http://whois.arin.net/rest/net/NET-172-0-0-0-0

OrgName:        Various Registries (Maintained by ARIN)
OrgId:          VR-ARIN
Address:        3635 Concord Parkway, Suite 200
City:           Chantilly
StateProv:      VA
PostalCode:     20151
Country:        US
RegDate:        1993-05-01
Updated:        2011-09-24
Comment:        Address space was assigned by the InterNIC regardless of
Comment:        geographic region.  The registrations are now being maintained
Comment:        by various registries, and the in-addr.arpa delegations are
Comment:        being maintained by ARIN.
Ref:            http://whois.arin.net/rest/org/VR-ARIN

OrgTechHandle: CKN23-ARIN
OrgTechName:   No, Contact Known
OrgTechPhone:  +1-800-555-1234 
OrgTechEmail:  nobody@example.com
OrgTechRef:    http://whois.arin.net/rest/poc/CKN23-ARIN

OrgAbuseHandle: CKN23-ARIN
OrgAbuseName:   No, Contact Known
OrgAbusePhone:  +1-800-555-1234 
OrgAbuseEmail:  nobody@example.com
OrgAbuseRef:    http://whois.arin.net/rest/poc/CKN23-ARIN