You should not use a DID range as Gatekeeper tech prefix
The technology prefix should not be used as part of the actual routing of the DNs.
The purpose of the field/config is to create groups (Example )
ie
1# are GWs
2# are video enabled GWs
3# are cucm trunks
This are then added to the number you dial and stripped by the GK.
You should take care of your routing using the zones configuration in the GK and not to rely in the tech prefix as an actual part of the DN you're trying to reach.
Here is an Example but just the basics so you understand the high level concepts. I'll just show 1 route pattern, create as many as needed.
use tech prefix as 1# for all systems
In CUCM register the GK
RP with DN 4[67]...
GW dial-peer dial peer with session RAS
destination pattern 4[34]...
gw-type-prefix 1#* default-technology
zone local CUCM cisco.com
zone local CME cisco.com
zone remote otherGK cisco.com 192.168.1.10 1719
zone prefix CUCM 43...
zone prefix CUCM 44...
zone prefix CME 46...
zone prefix CME 47...
zone prefix otherGK 1....
zone prefix otherGK 2....
zone prefix otherGK 3....
