inetnum: 120.16.0.0 - 120.23.255.255
netname: VODAFONE
descr: Vodafone Australia Pty.
descr: Mobile Service Provider
descr: 799 Pacific Highway
descr: Chatswood
descr: NSW 2067
country: AU
admin-c: VNA1-AP
tech-c: VNA1-AP
status: ALLOCATED PORTABLE
mnt-by: APNIC-HM
mnt-lower: MAINT-AU-VODAFONE

範囲広いけど「120.16.0.0/13」をdenyでいいような。