IPv4 prefix

173.203.0.0/17

IP Prefix (CIDR): 173.203.0.0/17
Subnet Mask: 255.255.128.0
Address Count: 32,768
IP Range: 173.203.0.0 - 173.203.127.255
Subnet calculator: Calculate subnet details

Registered Owners

Registration 1 of 2

Owner: Rackspace Hosting
Handle: RACKS-8
Address: 1718 Dry Creek Way Ste 115 San Antonio TX 78259-1837 United States
Registry: ARIN
Registered Prefix: 173.203.0.0/16 (173.203.0.0 - 173.203.255.255)

Registration 2 of 2

Owner: Rackspace Backbone Engineering
Handle: C02394558
Address: 9725 Datapoint Drive, Suite 100 San Antonio TX 78229 United States
Registry: ARIN
Registered Prefix: 173.203.0.0/22 (173.203.0.0 - 173.203.3.255)
Delegated Prefix: 173.203.0.0/16 (173.203.0.0 - 173.203.255.255)

BGP Announcements

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
173.203.0.0/17	Exact	AS19994	Rackspace Hosting	United States of America (US)	173.203.0.0	173.203.127.255