Windows 95, 98, and ME syntax
| /All | Display detailed information. |
| /Batch [file] | Write to file or ./WINIPCFG.OUT |
| /renew_all | Renew all adapters. |
| /release_all | Release all adapters. |
| /renew N | Renew adapter N. |
| /release N | Release adapter N. |
Windows 2000 and XP syntax ipconfig [/? | /all | /release [adapter] | /renew [adapter] | /flushdns | /registerdns | /showclassid adapter | /setclassid adapter [classidtoset] ]
| /all | Display full configuration information. |
| /release | Release the IP address for the specified adapter. |
| /renew | Renew the IP address for the specified adapter. |
| /flushdns | Purges the DNS Resolver cache. |
| /registerdns | Refreshes all DHCP leases and re-registers DNS names |
| /displaydns | Display the contents of the DNS Resolver Cache. |
| /showclassid | Displays all the dhcp class IDs allowed for adapter. |
| /setclassid | Modifies the dhcp class id. |
The default is to display only the IP address, subnet mask and default gateway for each adapter bound to TCP/IP. For Release and Renew, if no adapter name is specified, then the IP address leases for all adapters bound to TCP/IP will be released or renewed. For SetClassID, if no class id is specified, then the classid is removed. Examples To get your computers local network IP address, subnet mask, and default gateway typing ipconfig alone will display this information as shown below. Keep in mind this is only your local network information. If you're trying to determine your IP address used on the Internet we suggest viewing our system information page. ipconfig Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : hsd1.ut.comcast.net.
IP Address. . . . . . . . . . . . : 192.168.201.245
Subnet Mask . . . . . .
. . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.201.1 To get all local network information for your computer use the /all switch as shown below, followed by the results that would be seen when using this command. ipconfig /all Windows IP Configuration
Host Name . . . . . . . . . : COMPUTERH1
DNS Servers . . . . . . . . : 123.45.67.8
111.111.111.1
111.111.111.1
Node Type . . . . . . . . . : Broadcast
NetBIOS Scope ID. . . . . . :
IP Routing Enabled. . . . . : No
WINS Proxy Enabled. . . . . : No
NetBIOS Resolution Uses DNS : No
0 Ethernet adapter :
Description . . . . . . . . : PPP Adapter.
Physical Address. . . . . . : 44-44-44-54-00-00
DHCP Enabled. . . . . . . . : Yes
IP Address. . . . . . . . . : 123.45.67.802
Subnet Mask . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . : 123.45.67.801
DHCP Server . . . . . . . . : 255.255.255.255
Primary WINS Server . . . . :
Secondary WINS Server . . . :
Lease Obtained. . . . . . . : 01 01 80 12:00:00 AM
Lease Expires . . . . . . . : 01 01 80 12:00:00 AM
1 Ethernet adapter :
Description . . . . . . . . : 3Com 3C90x Ethernet Adapter
Physical Address. . . . . . : 00-50-04-62-F7-23
DHCP Enabled. . . . . . . . : Yes
IP Address. . . . . . . . . : 111.111.111.108
Subnet Mask . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . : 111.111.111.1
DHCP Server . . . . . . . . : 111.111.111.1
Primary WINS Server . . . . :
Secondary WINS Server . . . :
Lease Obtained. . . . . . . : 11 16 00 12:12:44 AM
Lease Expires . . . . . . . : ipconfig /displaydns Running the above command would display all the DNS information. ipconfig /flushdns Delete all DNS entries. | 
