Since my post on 1st April. After contacting the business making the calls (Zoomwebmedia) through their website and insisting they take out work number off their phone list we have not had one single call from the 006187200463. Although yesterday and today there was a call from phone 1003420 also with the same calling technique.

Finally some progress (with a little help from "Spark" investigations team) on this caller, the business is Zoom Web Media - link. http://www.zoomwebmedia.com/ After speaking with someone at the other end (sounded Indian) he gave me an Auckland phone number 09 887 5096 and an email address <sale.nz @ zoomwebmedia.com> I suggest you don't email them, this will give them access to your email address. I STRONGLY RECOMMEND YOU STAY AWAY FROM DOING BUSINESS WITH THEM. From what I have found, all they want is your money with poor to no service in return, which is what I suspected in the first place. Their phone numbers I suspect are not answered, I tried the Auckland number from a blocked mobile, all I hear is music!!!!
I plan to get this number blocked from incoming calls!!!!!!!!!!!!

Rings work number a few times a week. Thinking its an automatic dialer checking if your number is a valid phone number.

Same here, rings work number several times and hangs up. So annoying

Prank caller. Just hangs up after answering.

phones at least twice a week mid afternoon. Set my phone up to block this number so it only rings once briefly and disconnects. Suggest others block this number if they can on their phone set up.

Bloody pain in the arse keeps ringing then hangs up when you answer, and if you dont and it goes to answer phone they dont leave a message

Has called our number in New Zealand on 2 consecutive days, hangs up when we answer the phone.

Calls work number in New Zealand several time a week, sometimes twice in a day, it's been going on for several weeks. On 2 occasions only, after a long pause, I have had a short conversation with a person at the other end, asking for our work number to be deleted off their list, has made no difference. Ringing back the number does not work.
A big Peee off !!!!

Called at 1805 hours Monday 02.03.15 and hung-up!!!

Calls, makes no noise then hangs up

Calling NZ once a week, I answer, they hang up without saying anything. VERY frustrating.

Calling New Zealand every day at midday