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How to Check IP Address

KB0023419
Housing Network Services,Wireless Network
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Information

How to check for a valid IP address and release and renew the IP address while troubleshooting wired/wireless network access problems.

Windows 7 and 8

 

Note: If this method for finding an IP address does not work, use this optional method:


Mac OS X

 

Note: If problems continue:


Support Instructions

IP Address Ownership:

  • The IP range for private IP addresses allotted to BYU is: 10.0.0.0 - 10.38.33.255
  • The Church has all the IP addresses above that (10.31.128.0)
  • The MTC is special and technically part of the Church so they are on 10.80.x. 

 

169.xx.xx.xx, 10.0.xx.xx, and 172.xx.xx.xx mean they are not getting a connection (could be a cordjack, or virus or Quarantine problem) 169. xx.xx.xx usually is a self-assigned IP address due to no contact with DHCP.
 
192.xx.xx.xx and 10.0.xx.xx indicate a possible problem with an unauthorized router
 
An Error "Media State Disconnected" indicates that they are not getting a connection (could be a cordjackvirus, or TCP/IP setting problem-- also make sure to check if their local area connection is enabled and wireless is disabled)
 
192.xx.xx.xx usually is a Private address scheme not used by BYU OIT. 
 
*If the IP address is anything but what is listed here, they most likely have a static IP address and the KB0023495 should be checked.
 

Break-down of Valid IP addresses for the specific aspects of the BYU network: 

 
BYUSecure and Public Wired Access Ports:
 
10.4.0.0/16
10.9.0.0/16
10.10.0.0/16 
10.24.0.0/16 (See HBLL & TNRB for exceptions)
 
10.4.xxx.xxx
10.9.xxx.xxx
10.24.xxx.xxx
BYUGuest (except for the HBLL & TNRB):
 
10.14.0.0/16
10.19.0.0/16
10.30.0.0/16 
10.34.0.0/16
 
10.14.xxx.xxx
10.19.xxx.xxx
10.34.xxx.xxx
 
 
HBLL & TNRB,  BYUGuest:
 
 
10.24.32.0/20 
10.24.48.0/21
 
10.24.32-47.xxx
10.24.48-55.xxx 
Main Campus Buildings, Wired Ports only - mainly offices:
 
10.5.0.0/17
10.25.0.0/17
10.35.0.0/17

10.5.xxx.xxx
10.25.xxx.xxx
10.35.xxx.xxx

Campus Labs:
 
10.2.0.0/17
10.22.0.0/17
10.32.0.0/17

10.2.xxx.xxx
10.22.xxx.xxx
10.32.xxx.xxx 
 
Valid IP Address?
 
No:
  • Try to obtain a valid IP address (KB0024358)
 
Yes:
  • Release and renew the IP address to ensure the computer currently has a valid IP address
  • Return to KB0023426 (step #2). 
  • Return to KB0023563 (step #2)

Authored by Tim Hirschi
Last modified 2 hours ago