How long do DNS updates take to go live is a very common question, here's the answer and some information why; Propagation is the calculated length of your time it takes a domain's DNS (Domain Name System) data to be updated across the complete net once an amendment is created. It can take 30 seconds - 48 hours to complete thoroughly.
Before propagation has complete, some guests are going to be directed to your old DNS entries and IP's on your hosting account; but some guests will be directed to your new DNS entries.
How quickly guests are directed to the new DNS entries depends on their physical location, net service supplier, and luck; it's not something your providers have management over. Once propagation is complete, your new entries will be been on the server.
There are no definitive indications to tell that propagation is complete. Throughout the forty-eight hours, even though you'll be able to see your services on the new server, your next-door neighbour would possibly still be seeing/accessing the old server. This relies on 3 factors: your ISP, geographical location, and TTL.
That being said, it's always best to have your DNS entries setup correctly. Our team can help you get back live with your new servers quickly, click here to contact us today and get started.