Ask HN: Why is ipq.co so fast?

Posted by Tymiboss on Friday October 22, 2010 @05:28AM
from the ask-hn dept.

I've discovered http://ipq.co here, and I'm amazed by how fast the DNS record is available throught my company's DNS server. How is it possible? I've always been told that DNS propagation could took from 24h to 72h...I'd be really glad to know the trick to such blazzing fast updates!

( 2 comments | on HN )

Re:Ask HN: Why is ipq.co so fast? by pedrocr on Friday October 22, 2010 @06:10AM (#1819145)

Two reasons:

- If the domain is totally new your company's DNS server will not have it in cache and will query the authoritative server (probably what happened here)

- If the domain already exists in your company's DNS server cache it needs to have a TTL set, which basically defines how long it can be in cache before the original authoritative server is queried again (see http://en.wikipedia.org/wiki/Time_to_live#DNS_records). If this is set low the cache is less effective but DNS changes propagate faster.

[ Parent | on HN ]

Re:Ask HN: Why is ipq.co so fast? by Tymiboss on Friday October 22, 2010 @09:45AM (#1819654)

With ipq.co the subdomain is either new or already existing (and not editable). That explains everything, thanks!

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