Can't someone please tell me what's wrong with my IP Address

I was wondering if anyone could tell me why my IP Address is Class A - 10.0.0.25, but my Subnet Mask is Class C - 255.255.255.0 ? I tried to release this IP Address through Command Line but when I renew I get the exact same one. I've had the same service provider for 5 years now and haven't noticed until now, I have DSL through Verizon. I have a Modem and Router but both are set for Dynamic IP Addressing and they both look to have 192 IP Addresses, so I have no idea where my computer is getting that number. Could this also have something to do with the reason why my computer seems slow at times ? I should have speeds near 700 KB/Sec but I barely reach 100, that's not only what I'm paying for but when I do speed tests online they give me roughly the same number. I just bought a new computer with Windows 7 so I know it's not the hardware.

 

Hi ,

Please provide the detailed information like how many computers you have ?
Whats the ip address on that computer ?
Whats the operating system on the computer where your facing problem ?
Please send a screen shot of Command prompt with all Ip configurations

Ie Start ->Run ->Cmd ->Ipconfig /All -->Enter

Please send a screen shot ...

Thanks

 

Thank you for replying and I'm sorry for the delay in my answers.

IPCONFIG

Windows IP Configuration

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::7dcb:257d:4895:4d6b11
IPv4 Address. . . . . . . . . . . : 10.0.0.25
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.0.0.1

Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:ca:27b7:f5ff:ffe6
Link-local IPv6 Address . . . . . : fe80::ca:27b7:f5ff:ffe612
Default Gateway . . . . . . . . . : ::

Tunnel adapter isatap.{77FE9E5C-6F88-4B26-84B7-97AB7036FC37}:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

I have my own internet, that's where I'm connecting with a Westell Modem Model #6100 and a Netgear Wireless N Router. On this connection there's 3 Laptops and 1 Desktop, the IP on all the other computers are all the same and 3 are using Windows 7 while the other has Vista.

I hope this helps a little, someone on another site was saying it could be VLSM but I'm not even sure.