I have a fairly large network at home of both wired and wireless devices. Some use DHCP and some have static IP addresses. Some have utilities that enable you to easily locate these devices, some don't. Luckily for me there's a great App called iNet Pro that let's me see my entire network at a glance. It shows me the various devices I have online and more importantly what IP address they are currently using. I can see many of these graphically because if the App knows what the device is it shows a nice icon for it. It can also show you some nice info about the iOS device you're running the App on such as the External IP Address and UUID. For devices such as Servers or computers that you may unknowingly opened ports on that could be hacked into, it will show you which ports are open on any particular device. The App even shows you what services are running too as well as useful information such as the MAC address, model number and model identifier. Great when you're trying to figure out if you have the latest generation AirPort Base Station or other gear. The App is fast, has a great UI, provides a wealth of useful information and is a must for anyone with more than a few devices on their network.
You can get iNet Pro for $5.99 here from the 
iNet Pro
iNet Pro allows you to scan your entire network showing you all the devices that are online and a wealth of information about each device. It also has a beautiful easy to read interface.
- BananaGlue
- Get on App Store
- $5.99
All info was collected on 16th January, 2012 when the app was reviewed.
About Terry White
Terry is the co-author of The Best Selling "The iPhone Book" 1st, 2nd, 3rd and 4th editions. He has been active in the industry for over 25 years and is the founder and president of MacGroup-Detroit, Inc., Michigan's largest Macintosh Users Group, host of the Adobe Creative Suite Podcast and a technology writer - Terry White Tech Blog.
Do you also use or have the Mac version of the same app?
Yep: http://macgroup.org/blog/2011/12/12/inet-lets-you-see-everything-on-your-lan/