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dns-lookup

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UpdatedMay 28, 2026 at 09:36

DNS and domain information lookup. Use for checking DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA), WHOIS data, and domain availability. Helps with domain research, troubleshooting DNS issues, and finding if a domain is registered or free.

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delicb

delicb/dotfiles

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Software DevelopersComputer and Mathematical Occupations·SOC 15-1252

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SKILL.md

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name	dns-lookup
description	DNS and domain information lookup. Use for checking DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA), WHOIS data, and domain availability. Helps with domain research, troubleshooting DNS issues, and finding if a domain is registered or free.
compatibility	Requires dig, whois, and host commands (available by default on macOS and most Linux distributions).

DNS Lookup

Query DNS records, WHOIS information, and check domain availability.

Scripts

All DNS Records

./scripts/dns-records.sh <domain>

Returns all common DNS record types (A, AAAA, MX, TXT, NS, CNAME, SOA).

Specific Record Type

./scripts/dns-record.sh <domain> <type>

Query a specific record type:

A - IPv4 address
AAAA - IPv6 address
MX - Mail servers
TXT - Text records (SPF, DKIM, etc.)
NS - Name servers
CNAME - Canonical name (alias)
SOA - Start of authority
CAA - Certificate authority authorization
SRV - Service records
PTR - Reverse DNS

Example:

./scripts/dns-record.sh google.com MX
./scripts/dns-record.sh example.com TXT

WHOIS Lookup

./scripts/whois.sh <domain>

Returns WHOIS registration data including:

Registrar
Registration/expiration dates
Name servers
Registrant info (if not private)

Domain Availability

./scripts/available.sh <domain>

Checks if a domain is registered or available for purchase.

Bulk Availability Check

./scripts/bulk-available.sh <domain-list-file>
# or
echo -e "example1.com\nexample2.com" | ./scripts/bulk-available.sh

Check multiple domains at once.

Full Domain Report

./scripts/report.sh <domain>

Comprehensive report including:

All DNS records
WHOIS summary
Name server check
Mail server check

Examples

# Check all DNS records for a domain
./scripts/dns-records.sh github.com

# Check if a domain is available
./scripts/available.sh my-cool-startup.com

# Get WHOIS info
./scripts/whois.sh anthropic.com

# Full report
./scripts/report.sh linear.app

Common Use Cases

Task	Command
Find mail servers	`./scripts/dns-record.sh domain.com MX`
Check SPF/DKIM	`./scripts/dns-record.sh domain.com TXT`
Find who owns domain	`./scripts/whois.sh domain.com`
Is domain taken?	`./scripts/available.sh domain.com`
Debug DNS issues	`./scripts/report.sh domain.com`

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name	dns-lookup
description	DNS and domain information lookup. Use for checking DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA), WHOIS data, and domain availability. Helps with domain research, troubleshooting DNS issues, and finding if a domain is registered or free.
compatibility	Requires dig, whois, and host commands (available by default on macOS and most Linux distributions).

DNS Lookup

Query DNS records, WHOIS information, and check domain availability.

Scripts

All DNS Records

./scripts/dns-records.sh <domain>

Returns all common DNS record types (A, AAAA, MX, TXT, NS, CNAME, SOA).

Specific Record Type

./scripts/dns-record.sh <domain> <type>

Query a specific record type:

A - IPv4 address
AAAA - IPv6 address
MX - Mail servers
TXT - Text records (SPF, DKIM, etc.)
NS - Name servers
CNAME - Canonical name (alias)
SOA - Start of authority
CAA - Certificate authority authorization
SRV - Service records
PTR - Reverse DNS

Example:

./scripts/dns-record.sh google.com MX
./scripts/dns-record.sh example.com TXT

WHOIS Lookup

./scripts/whois.sh <domain>

Returns WHOIS registration data including:

Registrar
Registration/expiration dates
Name servers
Registrant info (if not private)

Domain Availability

./scripts/available.sh <domain>

Checks if a domain is registered or available for purchase.

Bulk Availability Check

./scripts/bulk-available.sh <domain-list-file>
# or
echo -e "example1.com\nexample2.com" | ./scripts/bulk-available.sh

Check multiple domains at once.

Full Domain Report

./scripts/report.sh <domain>

Comprehensive report including:

All DNS records
WHOIS summary
Name server check
Mail server check

Examples

# Check all DNS records for a domain
./scripts/dns-records.sh github.com

# Check if a domain is available
./scripts/available.sh my-cool-startup.com

# Get WHOIS info
./scripts/whois.sh anthropic.com

# Full report
./scripts/report.sh linear.app

Common Use Cases

Task	Command
Find mail servers	`./scripts/dns-record.sh domain.com MX`
Check SPF/DKIM	`./scripts/dns-record.sh domain.com TXT`
Find who owns domain	`./scripts/whois.sh domain.com`
Is domain taken?	`./scripts/available.sh domain.com`
Debug DNS issues	`./scripts/report.sh domain.com`