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I am encountering very strange problem, I'm unable to resolve any *.co.uk domain names. Other domain names ending with .com, .net etc are fine.

  • Pinging domain names like bbc.co.uk gives Ping request could not find host vantagefx.co.uk. Please check the name and try again straight away
  • I'm using a company PC on a network (we don't use proxies) and my colleagues on the same network can resolve *.co.uk fine
  • Ok, maybe it's my PC's DNS cache, I then tried rebooting, running ipconfig /flushdns, none helps
  • If I ping the the IP number directly it replies fine (eg: 212.58.253.67 for bbc.co.uk)
  • I've checked my C:\Windows\System32\Drivers\etc\hosts file and no rules related to *.co.uk exists there
  • I've cross checked my network connection settings with my colleagues and they're all matches

Is there anything else I can do to debug this mysterious problem? I'm on Windows 7 Professional.

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Try to resolv anydomain.co.uk domain name via several DNS server, for example via Google public DNS: nslookup vantagefx.co.uk 8.8.8.8. It could help investigate the issue.

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  • Ah thanks, didn't know nslookup can be used against another DNS server. The problem mysteriously goes away after a night, I think it's a problem with DNS caching mechanism on my PC / our network router
    – gerrytan
    Mar 13, 2013 at 21:37
  • do an ipconfig /flushdns in an elevated command prompt
    – pratnala
    Mar 16, 2013 at 16:48

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