delete routing permanently

How can I remove permanently a route from the routing table?

I have the following:

root@aiwutr1>netstat -rnv
IRE Table: IPv4
  Destination             Mask           Gateway          Device Mxfrg Rtt   Ref Flg  Out  In/Fwd
-------------------- --------------- -------------------- ------ ----- ----- --- --- ----- ------
default              0.0.0.0         10.42.134.129                1500*    0   1 UG      25      0
10.42.134.128        255.255.255.128 10.42.134.215        e1000g4  1500*    0   1 U        6      0
10.42.134.128        255.255.255.128 10.42.134.216        e1000g5  1500*    0   1 U        0      0
118.200.3.88         255.255.255.255 10.42.134.129                1500*    0   1 UGH      4      0
118.200.3.88         255.255.255.255 10.42.134.129        e1000g5  1500*    0   1 UGH      0      0
118.200.3.89         255.255.255.255 10.42.134.129                1500*    0   1 UGH      4      0
118.200.3.89         255.255.255.255 10.42.134.129        e1000g5  1500*    0   1 UGH      0      0
224.0.0.0            240.0.0.0       10.42.134.215        e1000g4  1500*    0   1 U        0      0
127.0.0.1            255.255.255.255 127.0.0.1            lo0     8232*    0  76 UH    4861      0

I remove

118.200.3.88         255.255.255.255 10.42.134.129                1500*    0   1 UGH      4      0
118.200.3.89         255.255.255.255 10.42.134.129                1500*    0   1 UGH      4      0

with

route delete 118.200.3.88 10.42.134.129

after a reboot I have the initial configuration , how can I delete the 2 routing for ever?

Thanks Gianluca.

try in ,,,,,,,,,,,,,,,,,delete in /etc/default/routezone

Thanks for the answer don't have that file.

ciao gianluca
and what's about a

/etc/defaultrouter 

file?

---------- Post updated at 09:19 AM ---------- Previous update was at 09:18 AM ----------

and i think you have to use:

route delete net 118.200.3.88 10.42.134.129