I'm not fully sure what you're trying to accomplish, so I will give a couple examples.
Your access-list as written permits dialing if traffic is destined for one of the IP addresses 131.40.1.253, 150, 100 or 9, or if 131.20.1.43 is sending traffic. Right now your time-range access-list has absolutely no impact. You unconditionally permit your selected list of hosts to bring up the link at all times - the time-range entry is after everything. Also, it explicitly denies traffic between 8:00 to 18:00, and then you implicitly deny traffiic outside those hours as well, because you deny by default at the end of the access list.
If you are attempting to block ALL dialing attempts between the sites between 8:00 and 18:00 and THEN only allow selected hosts to bring up the link outside of those hours, use this:
access-list 100 deny ip any any time-range usage
access-list 100 permit ip any host 131.40.1.253
access-list 100 permit ip any host 131.40.1.150
access-list 100 permit ip any host 131.40.1.100
access-list 100 permit ip any host 131.40.1.9
access-list 100 permit ip host 131.20.1.43 any
If you are attempting to allow a few hosts to bring up the link anytime and then allow anything at all to bring up the link during "unblocked" hours, use this:
access-list 100 permit ip any host 131.40.1.253
access-list 100 permit ip any host 131.40.1.150
access-list 100 permit ip any host 131.40.1.100
access-list 100 permit ip any host 131.40.1.9
access-list 100 permit ip host 131.20.1.43 any
access-list 100 deny ip any any time-range usage
access-list 100 permit ip any any
Let me know if I did not cover a case you need.
