$ sudo nmap 213.49.129.5 -P0

Starting Nmap 4.20 ( http://insecure.org ) at 2007-10-23 16:59 CEST
Interesting ports on ip-213-49-129-5.dsl-static.scarlet.be (213.49.129.5):
Not shown: 1684 filtered ports
PORT     STATE  SERVICE
23/tcp   closed telnet
80/tcp   open   http
81/tcp   open   hosts2-ns
110/tcp  open   pop3
443/tcp  open   https
1080/tcp open   socks
1723/tcp open   pptp
2301/tcp open   compaqdiag
3128/tcp open   squid-http
3389/tcp open   ms-term-serv
6588/tcp open   analogx
8000/tcp open   http-alt
8081/tcp open   blackice-icecap