vulcannz:
We have an office of mixed telecom and vodafone numbers, all the vodafone numbers were hit in a very short period which is unusual for phisers/spammers. Telecom numbers have not been touched.
I do notice that when some companies request numbers from telco's, they can be given a block of sequential numbers (if available in the pool obviously) - ie: xxxxxx1, xxxxxx2, xxxxxx3
Do your V/fone numbers have very similar/sequential numbers ?
If so, then Id say a spammer just happened to be trying that range......
Its how war-diallers worked back in the day.