Q: It says all my devices are off line but they aren't. Why won't it recognize any of my devices all of a sudden?

Try turning Find My iPhone (iPad/iPod) off in Settings>iCloud on one of your devices, then after a minute or so turn it back on.  If this works, repeat it on your other devices.

"Try turning Find My iPhone (iPad/iPod) off in Settings>iCloud on one of your devices, then after a minute or so turn it back on.  If this works, repeat it on your other devices."

How in the world does this help? ...especially if you've lost your device.

It restarts the Find My iPhone service on the device. And The OP never said he/she didn't have the devices, just the the we're showing as being offline.

I tried that on 1/30/15.

It was no help.

I suspect a server problem