All, We have a couple of customers with /18 networks. Apparently, these networks are not routed over some part of the Internet because they belong to a class B range (c.f. 170.9.192.0/18) and we only route part of it (c.f. /18 instead of /16). Is it a common routing policy to filter such routes (see Verio routing policy http://info.us.bb.verio.net/routing.html#PeerFilter <http://info.us.bb.verio.net/routing.html#PeerFilter> ) ? Thanks for your input, TELFORT Fr�d�ric Guillaume Tel: (+31) 20 200 70 80 Design & Planning Data Fax: (+31) 20 200 66 14 Networks & Systems Mob: (+31) 6 26 69 80 27