Asterisk - Registered Useragent Audit

Here is a quick script I put together to get a list of all phones currently registered to our Asterisk box:

#!/bin/bash

for i in `asterisk -rx "sip show peers" | grep -av Unspecified | grep -a "/" | grep -a "^[0-9]" | cut -f 1 -d '/'`
do
user=`asterisk -rx "sip show peer $i" | grep -a "Useragent"`
echo $i = $user |awk '{ print $1","$5 }'
done