I can access website only by ip [closed]

If you have done all the procedures correctly.

Time_to_live (TTL)

  

TTLs also occur in the Domain Name System (DNS), where they are defined by an authoritative name server for a specific resource record. When a cached (recursive) name server queries the authoritative name server for a resource record, it caches that record by the time (in seconds) specified by the TTL. If a stub resolves to query the cached name server for the same record before the TTL has expired, the cache server it will respond with the resource record already cached, instead of retrieving it from the authoritative name server again. The TTL responses to NXDOMAIN are defined from the SOA record's minimum MIN field and the SOA's own TTL and indicate how long a resolver can cache the negative response.

     

Shorter TTLs can cause heavier loads on an authoritative name server, but can be useful in changing the address of critical services such as Web servers or MX records, and therefore are often downloaded by the DNS administrator before a service is moved, to minimize interruptions.

     

Units used are seconds. An older TTL value common to DNS was 86400 seconds, which is 24 hours. A TTL value of 86400 would mean that if a DNS record was changed on the authoritative name server, DNS servers around the world could still be displaying the old value of its cache for up to 24 hours after the change.