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A Records (IPv4)

A Records (IPv4)

An A (Address) record maps a domain name to an IPv4 address, allowing browsers and other clients to locate the server hosting a website or service. This is the most fundamental DNS record type for connecting human-readable domain names to machine-readable IP addresses.

Common Uses

Pointing a domain (example.com) to a web server's IPv4 address

Creating subdomains that resolve to specific servers (blog.example.com, mail.example.com)

Load balancing by returning multiple A records for the same domain (round-robin DNS)

Valid Settings

Any valid IPv4 address in dotted-decimal notation (e.g., 192.0.2.1). Values must be in the range 0.0.0.0 to 255.255.255.255. Multiple A records can exist for the same hostname.

History

A records were defined in RFC 1035 in 1987 as part of the original DNS specification by Paul Mockapetris. They remain the primary method for IPv4 address resolution and are the most commonly queried DNS record type.

Maps the domain to IPv4 addresses.

Address	Name	TTL
151.101.193.140	reddit.com	131s
151.101.65.140	reddit.com	131s
151.101.1.140	reddit.com	131s
151.101.129.140	reddit.com	131s

AAAA Records (IPv6)

AAAA Records (IPv6)

An AAAA (quad-A) record maps a domain name to an IPv6 address, serving the same purpose as A records but for the newer 128-bit IPv6 addressing system. As IPv4 addresses become exhausted, AAAA records are increasingly important for modern internet infrastructure.

Common Uses

Enabling IPv6 connectivity for websites and services

Dual-stack configuration where both A and AAAA records exist for the same domain

Future-proofing infrastructure as the internet transitions from IPv4 to IPv6

Valid Settings

Any valid IPv6 address in colon-hexadecimal notation (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334 or shortened as 2001:db8:85a3::8a2e:370:7334). Addresses are 128 bits represented as eight groups of four hexadecimal digits.

History

AAAA records were defined in RFC 3596 in 2003 to support IPv6 addressing. The name 'AAAA' was chosen because IPv6 addresses are four times larger than IPv4 addresses (128 bits vs 32 bits).

Maps the domain to IPv6 addresses.

Address	Name	TTL
2a04:4e42:600:0:0:0:0:396	reddit.com	252s
2a04:4e42:200:0:0:0:0:396	reddit.com	252s
2a04:4e42:400:0:0:0:0:396	reddit.com	252s
2a04:4e42:0:0:0:0:0:396	reddit.com	252s

NS Records (Nameservers)

NS Records (Nameservers)

An NS (Name Server) record delegates a DNS zone to a specific authoritative name server, indicating which servers are responsible for answering DNS queries for that domain. NS records form the foundation of DNS's hierarchical structure.

Common Uses

Delegating subdomains to different name servers

Specifying which name servers are authoritative for a domain

Creating redundancy by listing multiple authoritative name servers for a zone

Valid Settings

A fully qualified domain name (FQDN) of a name server. Multiple NS records should exist for redundancy (typically 2-4). NS records appear both at the zone apex and in the parent zone to create proper delegation.

History

NS records were defined in RFC 1035 in 1987 as a core component of the DNS specification. They enable the distributed, hierarchical nature of DNS by allowing different organizations to manage different parts of the domain name space.

Authoritative nameservers for this domain.

Nameserver	Name	TTL
ns-1029.awsdns-00.org	reddit.com	166316s
ns-1887.awsdns-43.co.uk	reddit.com	166316s
ns-378.awsdns-47.com	reddit.com	166316s
ns-557.awsdns-05.net	reddit.com	166316s

MX Records (Mail Servers)

MX Records (Mail Servers)

An MX (Mail Exchange) record specifies which mail servers are responsible for accepting email on behalf of a domain, along with a priority value that determines the order in which servers should be tried.

Common Uses

Directing email to mail servers (mail sent to [email protected] goes to mail.example.com)

Setting up backup mail servers with different priority values for redundancy

Routing email to third-party email providers (Google Workspace, Microsoft 365)

Valid Settings

A priority value (0-65535, lower numbers indicate higher priority) followed by a fully qualified domain name of a mail server. Multiple MX records with different priorities provide failover capability.

History

MX records were defined in RFC 974 in 1986 and later refined in RFC 1035. They were created to separate mail routing from the host's A record, allowing organizations to use dedicated mail servers.

Mail exchange servers with priority (lower = higher priority).

Priority	Mail Server	TTL
1	aspmx.l.google.com	300s
10	aspmx2.googlemail.com	300s
10	aspmx3.googlemail.com	300s
5	alt1.aspmx.l.google.com	300s
5	alt2.aspmx.l.google.com	300s

TXT Records

TXT Records

A TXT (Text) record stores arbitrary text data associated with a domain, originally intended for human-readable notes but now primarily used for machine-readable configuration and verification data.

Common Uses

Domain ownership verification for third-party services (Google, Microsoft, SSL CAs)

Email authentication protocols (SPF, DKIM, DMARC policies)

Storing configuration data for various services and security mechanisms

Valid Settings

Any text string up to 255 characters per segment. Content is enclosed in double quotes. Common formats include key=value pairs and structured policies like SPF.

History

TXT records were defined in RFC 1035 in 1987 to allow arbitrary text annotations. While originally intended for human-readable comments, they've evolved to become critical infrastructure for email security (SPF in 2006) and domain validation.

Text records used for verification, SPF, DKIM, and other purposes.

$614ac4be-8664-4cea-8e29-f84d08ad875c

MS=ms71041902

$a5897185-49e1-4181-9065-51bd24737466

*apple-domain-verification=qC3rSSKrh10DoMI7

^atlassian-domain-verification=aGWDxGvt+oY3p7qTWt5v2uJDVJkoJAeHxwGqKmGQLMEsUXUJJe/Pm/k+GGNPpn6M

^atlassian-domain-verification=vBaV6PXyyu4OAPLiQFbxFMCboSTjoR/qxKJ2OlpI46ZEpZL/FVTIfMlgoM5Hy9eY

Xbox-domain-verification=95c33f4ee4b11d8827190dbc5371ca7df25b961019116e5565ce4aa36de9be3a

;cursor-domain-verification-f9fw38=WVB8yAMGTZXO7Je9DLuj1DIZB

-docusign=6ba0c5a9-5a5e-41f8-a7c8-8b4c6e35c10c

Dgoogle-site-verification=0uv13-wxlHK8FFKaUpgzyrVmL1YdNYW6v3PupLdw3JI

Dgoogle-site-verification=QO4VY1PRzsG-MxiQn3j0kxd_ZaFjcTk6MWBfKru0_5I

Dgoogle-site-verification=oh_YJE560y0e6FHP1RT7NIjyTlBhACNMvD2EgSss0sc

Dgoogle-site-verification=zZHozYbAJmSLOMG4OjQFoHiVqkxtdgvyBzsE7wUGFiw

-jamf-site-verification=EGK11tNR4hezQg0jZaIDpA

7jetbrains-domain-verification=bjn7o9fxbduga0omhaepeewtx

=onetrust-domain-verification=6b98ba3dd087405399bbf45b6cbdcd37

?postman-domain-verification=ad4c89daaf83d06f70cb6e8737cb323b039aeaae9e0e288c75081b0a715812a2d30e7c31402da867c70287ad8216da42074ffe7b4fcfcbf86f9316301329308f

Tstripe-verification=80aa7e2c9775fee2653f61b04b46da6fd227b56fecd9499e5f63cd0dcf563984

Tstripe-verification=9bd70dd1884421b47f596fea301e14838c9825cdba5b209990968fdc6f8010c7

;twilio-domain-verification=5e37855d7c9445e967b31c5e0371ebb5

?v=spf1 include:amazonses.com include:_spf.google.com include:19922862.spf01.hubspotemail.net include:reddit.deliver.highspot.com include:_spf.salesforce.com include:mail.zendesk.com ip4:52.50.24.208 ip4:35.174.145.124 ~all

SOA Record (Start of Authority)

SOA Record (Start of Authority)

An SOA (Start of Authority) record marks the beginning of a DNS zone and contains critical metadata about the zone, including the primary name server, contact email, serial number, and timing parameters. Every DNS zone must have exactly one SOA record.

Common Uses

Defining authoritative information about a DNS zone and its administrator

Controlling zone transfer behavior between primary and secondary name servers

Managing DNS caching behavior and update propagation timing

Valid Settings

Contains seven fields: primary name server (MNAME), responsible email (RNAME, @ replaced by .), serial number (typically YYYYMMDDNN), refresh interval, retry interval, expire time, and minimum TTL. Example refresh: 3600-86400 seconds.

History

SOA records were defined in RFC 1035 in 1987 as part of the original DNS specification. They were designed to support DNS's distributed architecture with zone replication and cache management.

Contains administrative information about the DNS zone.

Primary NS: ns-557.awsdns-05.net

Responsible: awsdns-hostmaster@amazon@com

Serial

Refresh

7200s

Retry

900s

Expire

1209600s

Minimum TTL

300s

Type	Value	Name	TTL
NS	ns-1029.awsdns-00.org	reddit.com	166316
NS	ns-1887.awsdns-43.co.uk	reddit.com	166316
NS	ns-378.awsdns-47.com	reddit.com	166316
NS	ns-557.awsdns-05.net	reddit.com	166316
A	151.101.193.140	reddit.com	131
A	151.101.65.140	reddit.com	131
A	151.101.1.140	reddit.com	131
A	151.101.129.140	reddit.com	131
AAAA	2a04:4e42:600:0:0:0:0:396	reddit.com	252
AAAA	2a04:4e42:200:0:0:0:0:396	reddit.com	252
AAAA	2a04:4e42:400:0:0:0:0:396	reddit.com	252
AAAA	2a04:4e42:0:0:0:0:0:396	reddit.com	252
MX1	aspmx.l.google.com	reddit.com	300
MX10	aspmx2.googlemail.com	reddit.com	300
MX10	aspmx3.googlemail.com	reddit.com	300
MX5	alt1.aspmx.l.google.com	reddit.com	300
MX5	alt2.aspmx.l.google.com	reddit.com	300
TXT	$614ac4be-8664-4cea-8e29-f84d08ad875c	reddit.com	1442
TXT	MS=ms71041902	reddit.com	1442
TXT	$a5897185-49e1-4181-9065-51bd24737466	reddit.com	1442
TXT	*apple-domain-verification=qC3rSSKrh10DoMI7	reddit.com	1442
TXT	^atlassian-domain-verification=aGWDxGvt+oY3p7qTWt5v2uJDVJkoJAeHxwGqKmGQLMEsUXUJJe/Pm/k+GGNPpn6M	reddit.com	1442
TXT	^atlassian-domain-verification=vBaV6PXyyu4OAPLiQFbxFMCboSTjoR/qxKJ2OlpI46ZEpZL/FVTIfMlgoM5Hy9eY	reddit.com	1442
TXT	Xbox-domain-verification=95c33f4ee4b11d8827190dbc5371ca7df25b961019116e5565ce4aa36de9be3a	reddit.com	1442
TXT	;cursor-domain-verification-f9fw38=WVB8yAMGTZXO7Je9DLuj1DIZB	reddit.com	1442
TXT	-docusign=6ba0c5a9-5a5e-41f8-a7c8-8b4c6e35c10c	reddit.com	1442
TXT	Dgoogle-site-verification=0uv13-wxlHK8FFKaUpgzyrVmL1YdNYW6v3PupLdw3JI	reddit.com	1442
TXT	Dgoogle-site-verification=QO4VY1PRzsG-MxiQn3j0kxd_ZaFjcTk6MWBfKru0_5I	reddit.com	1442
TXT	Dgoogle-site-verification=oh_YJE560y0e6FHP1RT7NIjyTlBhACNMvD2EgSss0sc	reddit.com	1442
TXT	Dgoogle-site-verification=zZHozYbAJmSLOMG4OjQFoHiVqkxtdgvyBzsE7wUGFiw	reddit.com	1442
TXT	-jamf-site-verification=EGK11tNR4hezQg0jZaIDpA	reddit.com	1442
TXT	7jetbrains-domain-verification=bjn7o9fxbduga0omhaepeewtx	reddit.com	1442
TXT	=onetrust-domain-verification=6b98ba3dd087405399bbf45b6cbdcd37	reddit.com	1442
TXT	?postman-domain-verification=ad4c89daaf83d06f70cb6e8737cb323b039aeaae9e0e288c75081b0a715812a2d30e7c31402da867c70287ad8216da42074ffe7b4fcfcbf86f9316301329308f	reddit.com	1442
TXT	Tstripe-verification=80aa7e2c9775fee2653f61b04b46da6fd227b56fecd9499e5f63cd0dcf563984	reddit.com	1442
TXT	Tstripe-verification=9bd70dd1884421b47f596fea301e14838c9825cdba5b209990968fdc6f8010c7	reddit.com	1442
TXT	;twilio-domain-verification=5e37855d7c9445e967b31c5e0371ebb5	reddit.com	1442
TXT	?v=spf1 include:amazonses.com include:_spf.google.com include:19922862.spf01.hubspotemail.net include:reddit.deliver.highspot.com include:_spf.salesforce.com include:mail.zendesk.com ip4:52.50.24.208 ip4:35.174.145.124 ~all	reddit.com	1442
SOA	Primary NS: ns-557.awsdns-05.net Responsible party: awsdns-hostmaster@amazon@com	reddit.com	900
Serial	Refresh	Retry, Minimum	Expire
1	7200	900, 300	1209600

Your IP: 216.73.216.115

About DNSApe

DNSApe is a fast, no-nonsense network diagnostics toolkit built for developers, sysadmins, and security researchers.

Version History

2.0 - 2025-12-21

Complete rewrite

Rebuilt with Laravel 12, Livewire 3, and Tailwind CSS 4
Live ping monitoring with real-time Chart.js visualization
Email Security tool: SPF, DKIM, DMARC validation
REST API with JSON responses (60 req/min)
MCP server for AI assistant integration (Claude, ChatGPT, etc.)
Slack integration with /dns, /whois, /ssl slash commands
Help tooltips explaining each tool and record type
Shareable ping sessions with unique URLs
Pretty/Raw view toggle with persistent preference
Browser-based ping for client-side latency testing
Enhanced WHOIS with domain + IP info combined
Improved SSL certificate error handling

Version 2.1 with performance improvements and bug fixes coming soon.

1.1.3 - 2019-04-30

Moved to new infrastructure, resolving most DNS Traversal issues
Replaced RBL with SSL validation tool

1.1.2 - 2019-04-17

Fixed DNS Traversal issue causing many requests to fail

1.1.1 - 2019-04-16

Minor UI adjustments
Added links to lookups in DNS results
Updated dependencies
Increased session timeout to 1 week to eliminate 419 errors
Updated IP address display
Removed dnsape.com as default lookup

1.1 - 2019-02-15

Several UI adjustments
Dark mode setting is persistent between sessions via cookie
Added GDPR cookie banner for session cookies
Added tool to show client IP in lookup field (settings menu)
Keyboard shortcuts for tools, focusing, text size, copying URLs
Shareable lookup URLs - browser address changes with tool usage
Added links to Github repo and feature voting
Several error handling and bug fixes

1.0.7 - 2019-01-11

Fixed HTTP Headers issue with multiple HTTPS redirects

1.0.6 - 2019-01-09

HTTP Headers now forward to and display HTTPS headers
UI adjustments

1.0.5 - 2019-01-08

Dark Mode!

1.0.4 - 2019-01-07

TLD and subdomain validation fixes

1.0.3 - 2019-01-06

Updated DNS Cache host list
IP address validation improvements
Fixed progress bar bug with failed queries
UI adjustments

1.0.2 - 2019-01-05

IPWhois and Ping now work with IP addresses as well as hostnames
Several validation enhancements reduce errors for many lookups
Several UI adjustments

1.0.1 - 2019-01-04

Added Recent Updates panel
Fixed Whois search for many TLDs
Fixed DNS Traversal for many TLDs
Changed to fluid viewport width
Added Privacy Policy

1.0 - 2019-01-02

Initial release