When examining your DNS configuration, the 25% distribution across nameservers indicates a round-robin DNS delegation. This means:

; Sample dig output showing NS record distribution
vks.uni.cc. 3600 IN NS dns1.freehostia.com
vks.uni.cc. 3600 IN NS dns2.freehostia.com
vks.uni.cc. 14400 IN NS ns1.softuff.com
vks.uni.cc. 14400 IN NS ns2.softuff.com

The 4-7 day inconsistency window occurs due to:

• DNS caching at multiple levels (ISP, local resolver, OS)
• TTL (Time-To-Live) values not being respected by some resolvers
• Nameserver hierarchies not synchronizing properly

Use this Python script to check global DNS resolution:

import dns.resolver

def check_dns_consistency(domain, expected_ip):
    resolvers = ['8.8.8.8', '1.1.1.1', '208.67.222.222']
    inconsistencies = 0
    
    for ns in resolvers:
        resolver = dns.resolver.Resolver()
        resolver.nameservers = [ns]
        try:
            answer = resolver.resolve(domain, 'A')
            if answer[0].address != expected_ip:
                print(f"INCORRECT: {ns} returns {answer[0].address}")
                inconsistencies += 1
        except Exception as e:
            print(f"ERROR with {ns}: {str(e)}")
    
    return inconsistencies

Several technical approaches can accelerate propagation:

# Linux/macOS terminal commands
sudo systemd-resolve --flush-caches
sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder

For Windows administrators:

ipconfig /flushdns
Clear-DnsClientCache

Use these diagnostic tools to identify propagation bottlenecks:

# Check authoritative nameservers
dig +trace vks.uni.cc

# Verify TTL values
dig +nocmd +noall +answer +ttlid a vks.uni.cc

# Check specific nameserver responses
dig @dns1.freehostia.com vks.uni.cc
dig @ns1.softuff.com vks.uni.cc

Contact support if you observe these conditions for >48 hours:

• Authoritative nameservers return correct records
• TTL values have expired (check with dig +ttlid)
• Global DNS checkers show inconsistent results

---

DNS propagation delays can be frustrating when migrating websites. What you're experiencing is actually quite common - a transitional state where different DNS servers worldwide haven't uniformly updated to your new nameserver configuration.

The 25% distribution in your dig/nslookup results shows equal weight distribution across four nameservers:

25% → dns1.freehostia.com
25% → dns2.freehostia.com 
25% → ns1.softuff.com
25% → ns2.softuff.com

This indicates your domain registrar hasn't fully removed the old nameservers from the delegation chain. Some DNS queries still hit Freehostia's servers while others reach your new provider.

Several factors contribute to extended propagation times:

• Registry propagation delays (up to 48 hours)
• ISP DNS cache TTLs (varies by provider)
• Public DNS resolvers like Google/Cloudflare caching
• Local machine/OS DNS caching

Check current DNS delegation status:

dig +trace yourdomain.com

Test specific nameservers directly:

dig @ns1.softuff.com yourdomain.com
dig @dns1.freehostia.com yourdomain.com

Client-side fixes:

# Flush DNS cache on Windows
ipconfig /flushdns

# macOS/Linux
sudo dscacheutil -flushcache
sudo systemd-resolve --flush-caches

Server-side actions:

1. Contact your registrar to verify all old nameservers are removed
2. Ensure TTL values on new DNS records are set low (300-600 seconds) during migration
3. Implement DNS prefetching in HTML headers:

<link rel="dns-prefetch" href="//yourdomain.com">

Python script to test DNS propagation across multiple resolvers:

import dns.resolver

resolvers = [
    '1.1.1.1',       # Cloudflare
    '8.8.8.8',       # Google
    '208.67.222.222' # OpenDNS
]

domain = "yourdomain.com"

for resolver in resolvers:
    custom_resolver = dns.resolver.Resolver()
    custom_resolver.nameservers = [resolver]
    try:
        answer = custom_resolver.resolve(domain, 'A')
        print(f"{resolver}: {answer[0].address}")
    except Exception as e:
        print(f"{resolver}: Error - {str(e)}")

If inconsistent resolution persists beyond 72 hours:

• Request registrar support to verify NS delegation
• Check DNSSEC configuration isn't causing validation failures
• Consider using a CDN with edge DNS to bypass propagation issues

For future migrations:

1. Lower TTL values 48 hours before changing nameservers
2. Maintain both old and new hosting during transition
3. Use DNS checkers like dnschecker.org to monitor global propagation