Analyze any domain

Get a complete DNS, email, SSL, HTTP and network analysis in seconds.

Total

DNS

Email

Security

Network

100

Availability

Domaingithub.com

IPv41

IPv60

MX records1

StatusActive

Domain technical report

GitHub · Change is constant. GitHub keeps you ahead. · GitHub

github.com

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

Generated: 2026-08-08T16:55:12-05:00 · Cached result

JSON CSV PDF Visit site

IPv41

IPv60

MX1

NS8

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

8 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

✓

CAA policy5 / 5 pts · Dns

Certificate authority restriction.

DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

1 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

53 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers19 / 35 pts · Security

5 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: lb-140-82-114-4-iad.github.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

140.82.114.4

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

0 github-com.mail.protection.outlook.com.

TXT

22 record(s)

"00Dd0000000hHE0=1TBKg000000TN2r"
"MS=ms58704441"
"google-site-verification=82Le34Flgtd15ojYhHlGF_6g72muSjamlMVThBOJpks"
"MS=ms44452932"
"anthropic-domain-verification-4az7qn=if8YWuRRqwLycGJDooumzHtxm"
"shopify-verification-code=t1YPwcmvnxZyBycaCpk1MPyWoFs72o"
"loom-site-verification=f3787154f1154b7880e720a511ea664d"
"TAILSCALE-xOzoDvFUzZr5YYVCQFuD"
"facebook-domain-verification=39xu4jzl7roi7x0n93ldkxjiaarx50"
"calendly-site-verification=at0DQARi7IZvJtXQAWhMqpmIzpvoBNF7aam5VKKxP"
"serval-domain-verification-ydryhj=qbkiEakpwEpTvHh5fIiCqtaue"
"apple-domain-verification=RyQhdzTl6Z6x8ZP4"
"v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.2" "27.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all"
"atlassian-domain-verification=jjgw98AKv2aeoYFxiL/VFaoyPkn3undEssTRuMg6C/3Fp/iqhkV4HVV7WjYlVeF8"
"jamf-site-verification=XtaPNIYghF_e_xRDI8CjgQ"
"docusign=087098e3-3d46-47b7-9b4e-8a23028154cd"
"miro-verification=d2e174fdb00c71e0bcf58f8e58c3da2dd80dcfa9"
"adobe-idp-site-verification=b92c9e999aef825edc36e0a3d847d2dbad5b2fc0e05c79ddd7a16139b48ecf4b"
"krisp-domain-verification=ZlyiK7XLhnaoUQb2hpak1PLY7dFkl1WE"
"MS=6BF03E6AF5CB689E315FB6199603BABF2C88D805"
"google-site-verification=UTM-3akMgubp6tQtgEuAkYNYLyYAvpTnnSrDMWoDR3o"
"stripe-verification=f88ef17321660a01bab1660454192e014defa29ba7b8de9633c69d6b4912217f"

NS

8 record(s)

ns-1707.awsdns-21.co.uk.
ns-1283.awsdns-32.org.
ns-520.awsdns-01.net.
ns-421.awsdns-52.com.
dns2.p08.nsone.net.
dns1.p08.nsone.net.
dns3.p08.nsone.net.
dns4.p08.nsone.net.

SOA

1 record(s)

ns-1707.awsdns-21.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

7 record(s)

0 issuewild "sectigo.com"
0 issuewild "letsencrypt.org"
0 issue "sectigo.com"
0 issue "globalsign.com"
0 issue "digicert.com"
0 issue "letsencrypt.org"
0 issuewild "digicert.com"

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

0 record(s)

—

Not configured

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all

DMARC

Configured

v=DMARC1; p=quarantine; sp=reject; pct=100; rua=mailto:dmarc@github.com; ruf=mailto:dmarc@github.com; fo=1

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCxZC/z2cK+2s1f/ktzSDSeFzkfIHrjwtGFsfKMAYvKaXjPVNzKykpbXBkX5nB7dVUTFttda7aROr2iSrIseQ27Ui+4rUZVzgFanE8RaXhYM9n5wPKNv8GtLJk7JgcsYZ7ErgID4uW2sEYyV/dnRYw6rDzOaeRKkKELTUfJI5ebLQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

GitHub · Change is constant. GitHub keeps you ahead. · GitHub

Description

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

Final URL

https://github.com/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://github.com/

Version

Server

github.com

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Sectigo Limited

github.com

Valid from

2026-07-02T19:00:00-05:00

Valid until

2026-09-30T18:59:59-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_128_GCM_SHA256

Security headers

5 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Review

Differences detected

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

140.82.114.3

63,42 ms

Cloudflare

1.1.1.1

140.82.113.4

44,25 ms

Quad9

9.9.9.9

140.82.114.4

37,22 ms

OpenDNS

208.67.222.222

140.82.114.3

41,83 ms

AdGuard

94.140.14.14

140.82.114.3

67,50 ms

IP, geolocation and ASNAssociated network information

140.82.114.4

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

github-com.mail.protection.outlook.com

Port 25: Closed/unreachable - 24.6 ms - 
Port 465: Closed/unreachable - 4020.8 ms - 
Port 587: Closed/unreachable - 4040.5 ms -

Recently analyzed domains

View all →

googletagmanager.com66 webkit.org83 presstelegram.com76 adminforge.de96 active24.cz95 www.news.bbc.co.uk4 cloudflare.com94 mn.us4 ourcodeblog.com63 ab.ca4