/usr/local/bin/mpscli -S 10.11.10.2 -N username -P password show subscriber accountid="0000000 1111111"

NAME: Last, First
ACCOUNTID: 0000000 1111111
DESCRIPTION: 
ORGANIZATION: 
DEPARTMENT: 
OFFICE: 
EMAILADDRESSES: email@host.net
BUSINESS1_PHONENUMBERS: 
BUSINESS2_PHONENUMBERS: 
HOME1_PHONENUMBERS: 555-1212
HOME2_PHONENUMBERS: 
CELLNUMBERS: 
PAGERNUMBERS: 
ADDRESS1: 150 Main Street
ADDRESS2: 
CITYSTATE: City, State
COUNTRYZIP: 99999
NOTE: Test modem @ home
LOOKUPKEY: E136470EB3C911DCA53A00E081647FA8
CREATIONTIME: Wed Dec 26 07:47:36 2007
MODIFIEDTIME: Tue Nov 18 11:08:55 2008
CABLEMODEM: 
	MACADDRESS: 000B06227472

	MACADDRESS: 0015A2789F9B


MTA: 
DEVICE: 
HOST: 

##</code><code>##

MACADDRESS=>6000B0227472
MACADDRESS2=>0015A2789F9B
...
MACADDRESSn=><insert mac address here>

##</code><code>##

Notes:
1)  @custinfo is where the data is returned from the command shown above
2) Not all data returned has a : in it, and we don't want that data so we just work on the data that is seperated by a ':'
3) In the case of the MACADDRESS there are spaces in front of it, so we delete them.

foreach (@custinfo) {
        if($_=~/:/){
                my ($key, $data) = split (/:/,$_);
                $key=~s/\s+//g;
                $record{$key} = $data;
                }
        }