Bueno, actualizo esto, siguiendo la web que dio antes Ximin, buscando mi ip actual y posteriormente la red a la que pertenecen (RIMA la te telefonica) he obtenido el siguiente listado (es un poquito largo):
217.125.156.0-217.125.157.255
217.125.192.0-217.125.255.255
217.125.160.0-217.125.191.255
217.125.152.0-217.125.155.255
213.98.181.0-213.98.181.255
213.98.182.0-213.98.183.255
213.98.184.0-213.98.191.255
213.98.192.0-213.98.255.255
213.4.44.0-213.4.45.255
213.0.64.0-213.0.71.255
213.0.0.0-213.0.3.255
195.57.120.0-195.57.123.255
195.55.248.0-195.55.251.255
217.125.150.0-217.125.151.255
217.125.149.0-217.125.149.255
80.58.100.0-80.58.104.63
217.125.158.0-217.125.159.255
80.58.32.0-80.58.55.255
80.26.148.0-80.26.150.255
195.55.93.0-195.55.99.255
195.57.76.0-195.57.80.255
212.170.0.0-212.170.26.255
213.4.0.0-213.4.27.255
217.125.0.0-217.125.148.255
195.55.216.0-195.55.222.255
80.59.0.0-80.59.255.255
80.58.0.0-80.58.24.255
213.98.0.0-213.98.180.255
80.58.124.0-80.58.125.255
80.58.86.0-80.58.97.255
80.58.64.0-80.58.84.255
80.58.128.0-80.58.159.255
80.58.105.0-80.58.109.255
80.58.240.0-80.58.249.255
80.32.0.0-80.35.255.255
80.58.255.0-80.58.255.255
80.58.99.32-80.58.99.47
80.58.63.192-80.58.63.199
80.58.63.0-80.58.63.15
80.58.253.0-80.58.253.255
80.58.62.0-80.58.62.255
80.58.184.0-80.58.184.255
80.58.185.0-80.58.185.255
80.58.186.0-80.58.186.255
80.58.192.0-80.58.192.31
80.58.192.128-80.58.192.255
80.58.63.32-80.58.63.63
80.58.251.0-80.58.251.255
80.58.252.0-80.58.252.255
80.58.187.0-80.58.187.63
80.58.187.64-80.58.187.95
80.58.187.128-80.58.187.191
80.58.187.192-80.58.187.223
80.58.192.32-80.58.192.47
80.58.192.48-80.58.192.63
80.58.254.0-80.58.254.127
80.58.63.64-80.58.63.95
80.58.188.0-80.58.188.63
80.58.193.0-80.58.193.31
80.58.236.0-80.58.239.255
81.47.237.0-81.47.237.41
80.58.85.0-80.58.85.255
81.32.0.0-81.34.255.255
80.58.31.0-80.58.31.255
80.58.160.0-80.58.163.255
80.58.164.0-80.58.167.255
80.58.120.0-80.58.120.127
80.58.196.0-80.58.197.127
80.58.197.128-80.58.199.127
80.58.232.0-80.58.235.255
80.58.220.0-80.58.227.255
80.58.63.128-80.58.63.191
80.58.63.200-80.58.63.255
213.96.0.0-213.96.255.255
213.97.0.0-213.97.255.255
217.126.0.0-217.126.255.255
217.127.0.0-217.127.255.255
81.47.0.0-81.47.19.135
81.47.64.0-81.47.83.135
80.58.63.16-80.58.63.31
80.58.121.0-80.58.123.255
80.58.118.0-80.58.119.255
80.58.112.0-80.58.114.23
80.58.206.0-80.58.207.255
81.47.237.42-81.47.237.255
81.46.0.0-81.46.3.255
80.58.117.0-80.58.117.63
80.58.120.128-80.58.120.255
81.46.61.0-81.46.63.255
80.58.208.0-80.58.219.255
81.45.128.0-81.45.151.255
80.58.254.128-80.58.254.255
81.47.192.0-81.47.192.255
81.40.0.0-81.43.86.255
80.58.127.0-80.58.127.255
80.58.98.192-80.58.99.15
80.58.98.64-80.58.98.127
81.47.249.0-81.47.252.255
81.47.255.0-81.47.255.255
81.45.0.0-81.45.5.255
81.45.32.0-81.45.37.255
81.47.254.0-81.47.254.255
81.47.234.0-81.47.234.127
80.58.114.64-80.58.116.255
80.58.117.64-80.58.117.255
80.58.111.192-80.58.111.255
81.47.232.0-81.47.232.15
81.46.4.0-81.46.7.255
81.44.0.0-81.44.127.255
81.44.128.0-81.44.159.255
80.58.168.0-80.58.168.255
80.24.0.0-80.24.255.255
80.25.0.0-80.25.255.255
80.26.0.0-80.26.127.255
80.26.128.0-80.26.135.255
80.26.136.0-80.26.143.255
81.35.0.0-81.39.255.255
80.58.104.128-80.58.104.255
80.58.61.232-80.58.61.239
80.58.228.0-80.58.231.255
80.58.61.240-80.58.61.240
81.46.52.0-81.46.55.255
81.46.56.0-81.46.56.223
81.44.160.0-81.44.255.255
83.32.0.0-83.35.255.255
81.45.152.0-81.45.152.255
80.58.61.244-80.58.61.245
80.58.25.0-80.58.28.255
81.46.48.0-81.46.51.255
80.58.61.252-80.58.61.255
81.47.253.0-81.47.253.255
81.47.247.0-81.47.248.255
83.36.0.0-83.36.52.255
80.58.61.248-80.58.61.251
81.47.128.0-81.47.175.255
81.45.254.0-81.45.255.255
80.58.169.0-80.58.169.149
80.58.114.63-80.58.114.63
80.58.61.228-80.58.61.231
81.45.153.0-81.45.153.255
81.47.246.0-81.47.246.255
80.58.61.216-80.58.61.223
80.58.61.192-80.58.61.207
81.45.213.0-81.45.253.255
80.36.0.0-80.39.255.255
83.36.53.0-83.36.255.255
83.37.0.0-83.39.255.255
83.40.0.0-83.40.200.255
81.47.230.0-81.47.230.63
81.46.32.0-81.46.32.127
80.58.61.160-80.58.61.191
80.58.61.224-80.58.61.227
80.58.61.208-80.58.61.211
81.47.244.0-81.47.245.255
81.47.176.0-81.47.179.255
81.47.236.0-81.47.236.255
81.47.238.0-81.47.241.255
80.58.30.0-80.58.30.63
80.58.61.144-80.58.61.159
81.46.8.0-81.46.11.255
80.58.56.0-80.58.56.255
83.47.192.0-83.47.255.255
83.40.201.0-83.45.92.255
80.58.30.252-80.58.30.255
81.47.230.192-81.47.230.255
80.58.188.64-80.58.188.255
80.58.169.150-80.58.169.255
80.58.30.64-80.58.30.255
80.58.30.64-80.58.30.251
81.47.235.0-81.47.235.255
81.47.228.64-81.47.229.255
80.58.193.32-80.58.193.223
Bueno, esto me lleva a otra pregunta .. veo que varios de esos rangos son fijos y otros dinamicos,... sabe alquien identificarlos (creo recordar que los 8x.*.*.* son dinamicos pero no estoy seguro)