Around 3 years ago, I moved house from one exchange area to another (Pakuranga to Howick). Was with Orcon they moved everything over no problems including my phone number.

Tried to migrate to Vodafone this week, apparently the number I have can't be migrated to them as it belongs to the Pakuranga exchange. Despite the fact that it works fine with Orcon.

Not sure if Orcon have done something with the number, decoupling it from the exchange, whatever they did Vodafone seem incapable of doing. It was a deal breaker and they wouldn't proceed

I'm struggling to make sense of this tbh, has anyone else hit this issue.

I don't want to change my number, how do I move ISPs ?

Thanks