Advanced Records

Do you truly mean that the ISP is hosting the nameservers for your domain, as well as hosting the site and email? If so, then you would need to change nameservers and recreate the DNS records. For a reason like that, I would recommend letting the domain registrar handle the nameservers, then it doesn't matter who is hosting the website or email, as long as the DNS entries are correct.

Now if you meant that a web hosting company is handling all of those things, then the answer is it depends. If you're looking to move everything, that becomes an issue, yes. If you're only moving the website and email, but the current company can be utlized to keep hosting the domain and nameservers, then the answer is no. However, you do of course have to make sure to properly correct DNS and MX records.

There is another company hosting the website.
The "Resource Records" are hosted by the existing ISP. These records would include their "NS" records pointing their FQDN servers. There are also "A" records pointing to the IP address location of the Exchange server, the webmail IP address, and  the www.acme.com IP address. There are also two "CNAME" entries for ftp and www.
Just wondering what would happen if we go to a new Internet provider and stop paying the existing provider. Thanks

Hi,

Hosting of your public DNS records is independent of your internet connection - in fact, I always strongly advise my customers to never use their ISP for this since it just makes life more complicated if they want to change providers.

So, I would suggest that you begin the process of moving the public DNS records to another party now.  You will need to get all the records replicated with the new provider, so get a copy (login to their control panel or whatever means you have to make changes) and then setup the new records with the new provider.  Once done, change the authoritative nameservers to the new provider, and you are done.

The other thing you will need to do if you then move ISPs is to get your new ISP to setup a PTR (reverse DNS) record for the new IP address that you have.

Hope that helps,

Alan.

As others have said, I would move the DNS records to another company, since you plan to stop paying the company that is doing it now.

You can use the DNS registrar, your web hosting company, or somebody else for DNS. It sounds like you are a small company. I would use your hosting provider of the web hosting provider...whoever has the easiest control panel to use.

U need to move PTR record (reverse DNS) with new ISP who will own your public IP because that record only can be managed by IP provider
Rest of the records can be kept with existing ISP, DNS registrar etc

So - just to be clear:
We are presently with the acme ISP so the records are as follows:
ourwebsite.com - NS  - acme2.acme.com
ourwebsite.com - NS - acme1.acme.com
ourwebsite.com - NS - acme3.acme.com
ourwebsite.com - MX 10 - mail.ourwebsite.com
ourwebsite.com - A - (WAN IP address of the company hosting our website)
mail.ourwebsite.com - A - (WAN IP address of our in house exchange server)
webmail.ourwebsite.com - A - (same as above)
ftp - CNAME - ourwebsite.com
www - CNAME - ourwebsite.com

If we move to the xyz ISP would we need to cancel acme and have xyz create these records or just change the NS records at the acme ISP?
Are these records necessary at all?
Any suggestions as to the correctness of the records.... Thank you