Analyze any domain

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

Total

DNS

Email

Security

Network

100

Availability

Domainnullschool.net

IPv43

IPv63

MX records5

StatusActive

Domain technical report

Nullschool Technologies Inc.

nullschool.net

Generated: 2026-08-10T12:17:48-05:00 · Cached result

JSON CSV PDF Visit site

IPv43

IPv63

MX5

NS2

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

3 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

3 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

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

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

5 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

49 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 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

3 record(s)

104.26.10.231
172.67.75.143
104.26.11.231

AAAA

3 record(s)

2606:4700:20::ac43:4b8f
2606:4700:20::681a:ae7
2606:4700:20::681a:be7

CNAME

0 record(s)

—

Not configured

MX

5 record(s)

10 alt4.aspmx.l.google.com.
1 aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
10 alt3.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.

TXT

5 record(s)

"google-site-verification=aby3X7eoD88gKK3pJ1XPe_YusXhQGr945I74ez7auTU"
"google-site-verification=4WDvHplk10Z6Kgfg07gDLqY98maZcmb8ufWRocywwec"
"google-site-verification=y4fd8wtarYVABRokLUOQ7dEegsklrwoNHWmXVpX--V8"
"google-site-verification=2HovbJFrfo_kHKYCGAXwch4154MvWqbkXOhcSn7uP_M"
"v=spf1 include:_spf.google.com ~all"

NS

2 record(s)

rick.ns.cloudflare.com.
emma.ns.cloudflare.com.

SOA

1 record(s)

emma.ns.cloudflare.com. dns.cloudflare.com. 2411208870 10000 2400 604800 1800

CAA

0 record(s)

—

Not configured

DS

1 record(s)

2371 13 2 70BD2FE2031ACE64DA7A8BBBE5743B55E2C7AD703F74F9BAED7FF870 2CBFC9DE

DNSKEY

2 record(s)

256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==

RRSIG

4 record(s)

SOA 13 2 1800 20260811181738 20260809161738 34505 nullschool.net. f5GFW2HUwBB+ZgfTXJoCV0tJXHoUmOfp2vH7oQkmPTHwM2brPcdMBCnd d3vr6Y2eLnpquzQ1m86iFLDItugN4A==
NS 13 2 86400 20260811181738 20260809161738 34505 nullschool.net. fJAduiwbNi6bMeHbL0EGN/+fPWO6MiGgY/4dDjNUD+1Ff2MmQCFeYCOs mZqWHI+8Q7QDa4BBHX1lzrhusNo6zw==
AAAA 13 2 300 20260811181738 20260809161738 34505 nullschool.net. a3tsMbmXHOJv70AqKfPevooSpW0WynxYH7T3FX36AR8kqXUnv/BxMQfz pEe490jmbnWWmRccu/J9FEaBicpngA==
DS 13 2 86400 20260817033717 20260810022717 7272 net. ZKW8VK62kwZ71SxjiJ6456ezWP+tDGc1pKqbleRBJzHCLq6dZD/VGBQl zTJXi8lWFWr6uGhakT0S7f0PvQoy/Q==

NSEC

1 record(s)

\000.nullschool.net. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

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 include:_spf.google.com ~all

DMARC

Configured

v=DMARC1; p=reject; rua=mailto:dmarc@nullschool.net

DKIM

Selector google

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4TURG17V7828W6qSZbBIq5LilMmfvAWXKYotDLtqMJR/5ryU9rxlLLTjSA2BnW6xz2HxMBqb8+JVkxrM4MPRwTIr5Nd3FZKnJyf+YCMYmUoTAIWoTy4TWap5rEoy0xUv8SGb8oYDgifmAb+I04hETME/yE4pIUV6I5MvYhNeLjytXwQzpt9kWOqlZcdl1YVlRe/nt+yLHn2BVHpz13TodFgeFYaIKCzKjdkJTnWo/FK33XA8RgDv9jrVZh6pK4lVFCk7bfMiXTsjwscsT1fr+SkmVV1MMFzsDLSMThNZi9tqk7MRFgN8XDUW6vJbBg4wtVZQWkLI4Mg/oGmFWSSF9QIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Nullschool Technologies Inc.

Description

Final URL

https://nullschool.net/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://nullschool.net/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

nullschool.net

Valid from

2026-07-01T07:30:09-05:00

Valid until

2026-09-29T07:30:08-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

0 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

Referrer PolicyNot detected

—

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

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

104.26.10.231, 104.26.11.231, 172.67.75.143

109,05 ms

Cloudflare

1.1.1.1

104.26.10.231, 104.26.11.231, 172.67.75.143

47,67 ms

Quad9

9.9.9.9

104.26.10.231, 104.26.11.231, 172.67.75.143

49,87 ms

OpenDNS

208.67.222.222

104.26.10.231, 104.26.11.231, 172.67.75.143

48,29 ms

AdGuard

94.140.14.14

104.26.10.231, 104.26.11.231, 172.67.75.143

71,26 ms

IP, geolocation and ASNAssociated network information

104.26.10.231

No data

success

country

region

city

asn

organization

isp

172.67.75.143

No data

success

country

region

city

asn

organization

isp

104.26.11.231

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

alt4.aspmx.l.google.com

Port 25: Closed/unreachable - 0.6 ms - 
Port 465: Closed/unreachable - 4018.6 ms - 
Port 587: Closed/unreachable - 4020.8 ms -

Recently analyzed domains

View all →

enamad.ir42 googletagmanager.com66 z9x8c7v6b5-debug-trigger-wapdns.com4 metooo.it85 digital.ai76 asso.fr4 apnic.net95 racingpost.com66 go.id15 businessfrance.fr96