need a little help cisco

I have a cisco 1600 at a client, and they are moving isps and I need to change the lan address from to they are telling me it is on ethernet0 how do I do this?
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This should do it.

router#conf t
router(config)#interface e0
router(config-if)#no ip address <subnet mask>
router(config-if)#ip address <subnet mask>
router#wr mem
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