domain-checker

Domain Checker

Check if domains are available for registration.

Quick Check (WHOIS)

# Single domain
whois example.com 2>/dev/null | grep -iE "no match|not found|available|no data found" && echo "✅ AVAILABLE" || echo "❌ TAKEN"

# Multiple TLDs at once
for tld in com ai io co net; do
  result=$(whois "myname.$tld" 2>/dev/null | grep -iE "no match|not found|available|no data found|^No " | head -1)
  if [ -n "$result" ]; then
    echo "✅ myname.$tld - AVAILABLE"
  else
    echo "❌ myname.$tld - taken"
  fi
done

Bulk Check Function

check_domains() {
  local name="$1"
  shift
  local tlds="${@:-com ai io co net org}"
  
  echo "Checking: $name"
  echo "---"
  for tld in $tlds; do
    domain="${name}.${tld}"
    # Use timeout to avoid hanging on slow WHOIS servers
    result=$(timeout 5 whois "$domain" 2>/dev/null | grep -iE "no match|not found|available|no data found|^No |status: free" | head -1)
    if [ -n "$result" ]; then
      echo "✅ $domain"
    else
      echo "❌ $domain"
    fi
  done
}

# Usage
check_domains "asklee" com ai io co bot
check_domains "myproject" com net org io

Brainstorm + Check Pattern

When helping with domain research:

1. Generate 10-20 name ideas
2. Bulk check availability:

for name in idea1 idea2 idea3 brandname coolbot; do
  check_domains "$name" com ai io
  echo ""
done

TLD-Specific WHOIS Quirks

TLD	Available indicator
.com, .net, .org	"No match for"
.io	"is available" or "NOT FOUND"
.ai	"NOT FOUND" or "No Data Found"
.co	"No Data Found"
.bot	"No match for domain"
.app	"Domain not found"

Fast API Alternative (if WHOIS is slow)

# Using domainr API (no key needed for basic checks)
curl -s "https://domainr.p.rapidapi.com/v2/status?domain=example.com" \
  -H "X-RapidAPI-Key: YOUR_KEY"

# Or DNS-based check (not 100% reliable but fast)
dig +short "$domain" | grep -q . && echo "❌ Has DNS" || echo "🤔 No DNS (might be available)"

Tips

• Check during off-peak hours for faster WHOIS responses
• Some premium/reserved domains show as "available" in WHOIS but aren't purchasable
• Always verify on registrar (GoDaddy, Namecheap, Porkbun) before announcing availability
• .ai domains require Anguilla presence or use a registrar that handles it