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Cisco SIP + one registration and few numbers

Hello , i m configuring cisco 2921 and CUCM . We have one username and password for SIP registration and few phone numbers  from our ISP. 

Here is sip-ua configuration

sip-ua
 credentials username 0445XXXX80 password 7 XXXXXXXXXXXXXXXX realm voip.XXXXXX.XXX
 authentication username 0445XXXX80 password 7 XXXXXXXXXXXXXXXX realm voip.XXXXX.XXX
 no remote-party-id
 retry invite 2
 retry register 10
 timers connect 100
 registrar dns:voip.XXXX.XXX 3600
 sip-server dns:voip.XXXX.XXX
 host-registrar

When we try to call to one of the phone numbers, for example 0445XXX90 ,  all the sip INVITE messages have same number 0445XXXX80  but, we expect to see 0445XXX90.  Only the TO: sip header contains correct number 0445XXX90. 

While debugging sip messages in cisco 2921 , we see :

For example we call :

to number one , ends with 89
INVITE sip:0445****580@xx.xx.xx.xx:5060;transport=udp SIP/2.0
To: <sip:0445****89@xx.xx.xx.xx;user=phone>

 two, ends with 90
INVITE sip:0445****580@77.xx.xx.xx:5060;transport=udp SIP/2.0
To: <sip:0445****90@xx.xx.xx.xx;user=phone>

three, ends with 91
INVITE sip:0445****580@77.xx.xx.164:5060;transport=udp SIP/2.0
To: <sip:0445****91@xx.xx.xx.xx;user=phone>

In such case we cannot route messages correctly .

We need to route and trans-code such numbers into short numbers like (8000-8100) and route them to CUCM.

How can we resolve such problem ? 

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