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Total

DNS

Email

Security

Network

100

Availability

Domainjoinmastodon.org

IPv44

IPv68

MX records1

StatusActive

Domain technical report

Mastodon - Decentralized social media

joinmastodon.org

Learn more about Mastodon, the radically different, free and open-source decentralized social media platform.

Generated: 2026-08-08T22:19:00-05:00 · Cached result

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IPv44

IPv68

MX1

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

8 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 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 propagation10 / 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

45 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 DNS0 / 30 pts · Network

PTR not detected.

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 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

4 record(s)

151.101.129.91
151.101.65.91
151.101.193.91
151.101.1.91

AAAA

8 record(s)

2a04:4e42:600::347
2a04:4e42:400::347
2a04:4e42:200::347
2a04:4e42:a00::347
2a04:4e42::347
2a04:4e42:e00::347
2a04:4e42:800::347
2a04:4e42:c00::347

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

1 smtp.google.com.

TXT

4 record(s)

"v=spf1 include:_spf.google.com include:helpscoutemail.com ~all"
"google-site-verification=ZdmUdPkn5AACdTIaHKg-x5DL9Z0UEeQMt6QXplRQq8U"
"google-site-verification=HireWwzGlFDP1DwVu9QWZPc32E2T6ABj2SG_S17n5tQ"
"have-i-been-pwned-verification=dweb_n410bsmsvupii63ib5jghysh"

NS

4 record(s)

ns1.exoscale.com.
ns1.exoscale.ch.
ns1.exoscale.net.
ns1.exoscale.io.

SOA

1 record(s)

ns1.exoscale.ch. admin.dnsimple.com. 1673628278 86400 7200 604800 300

CAA

2 record(s)

0 issue "certainly.com"
0 issue "letsencrypt.org"

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 include:_spf.google.com include:helpscoutemail.com ~all

DMARC

Configured

v=DMARC1; p=quarantine; pct=100; rua=mailto:re+o0lrkfqmq6a@dmarc.postmarkapp.com; sp=quarantine; aspf=r;

DKIM

Selector google

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAppbKUZUE0dsnkBwgNz36qOJshMes6SY4y1g0YvTClyt2BYTrpBdEHQpD6zC5vutjV/UNIfLXkqyzgPTbBRInckT6Z7as9z8E4/y15mLv1kaEYBhkqPUYH8XRy/2eVRk0a9takIhv5EGUReadtk7dpcuvVBYXD311WA76AuISUxM7utPuCmRk8C282/XB7uUFCEQjqEkI/MawDPeiQYEqDI89FsEjyKm6hvLzfi5AGgibdWNKg2CuspIwpfXck3IIllSf3GJm/s/X1hGZWzlMVfn08SnjD5BnnUAxcyaDOs9iTZVOhFNoQQsi7+uIxjthQX1KPsuQt349KL6ASW0BMwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Mastodon - Decentralized social media

Description

Learn more about Mastodon, the radically different, free and open-source decentralized social media platform.

Final URL

https://joinmastodon.org/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://joinmastodon.org/

Version

Server

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

joinmastodon.org

Valid from

2026-06-25T09:33:24-05:00

Valid until

2026-09-23T09:33:23-05:00

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-OptionsNot detected

✓

Referrer PolicyImplemented

✓

Permissions PolicyImplemented

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

151.101.1.91, 151.101.129.91, 151.101.193.91, 151.101.65.91

92,65 ms

Cloudflare

1.1.1.1

151.101.1.91, 151.101.129.91, 151.101.193.91, 151.101.65.91

60,64 ms

Quad9

9.9.9.9

151.101.1.91, 151.101.129.91, 151.101.193.91, 151.101.65.91

47,23 ms

OpenDNS

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

smtp.google.com

Port 25: Closed/unreachable - 44.3 ms - 220 mx.google.com ESMTP 586e51a60fabf-459f1f687f2si5361614fac.175 - gsmtp
Port 465: Closed/unreachable - 4020.9 ms - 
Port 587: Closed/unreachable - 4021.3 ms -

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