Analyze any domain

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

Total

DNS

Email

Security

Network

100

Availability

Domainkodansha.co.jp

IPv41

IPv60

MX records5

StatusActive

Domain technical report

講談社「おもしろくて、ためになる」を世界へ

kodansha.co.jp

講談社の公式ホームページ総合トップページ。講談社が出版する書籍・コミックの新刊情報、作品検索、会社情報、講談社が運営する各種サービス・コンテンツなどをご紹介します。

Generated: 2026-08-09T23:25:45-05:00 · Cached result

JSON CSV PDF Visit site

IPv41

IPv60

MX5

NS4

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

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 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

151 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers27 / 35 pts · Security

7 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: ec2-13-231-99-251.ap-northeast-1.compute.amazonaws.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)

13.231.99.251

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

5 record(s)

5 alt2.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
1 aspmx.l.google.com.
10 aspmx2.googlemail.com.
10 aspmx3.googlemail.com.

TXT

9 record(s)

"apple-domain-verification=11w2ahT1OXVAXgtA"
"MS=085508D4C0D0A8161AFB23E97085F7098BDAA106"
"MS=ms22176288"
"v=spf1 include:_spf.google.com +ip4:210.232.13.224/27 +ip4:219.101.182.24/32 +ip4:118.238.217.217/32 +ip4:163.43.136.149/32 +ip4:153.125.144.148/32 +ip4:35.72.225.0/25 +ip4:106.185.100.0/23 +ip4:106.185.96.0/23 +ip4:106.185.98.0/23" " +ip4:210.166.79.114/32 +ip4:165.76.142.193/32 +ip4:126.139.43.238/32" " include:aspmx.pardot.com include:spf.protection.outlook.com include:spfd.protection.outlook.com include:spf-bma.mpme.jp ~all"
"pardot884203=c9a33ee98bd2985f9ced3c383feca8b92b538a398624af9776f0a13d029b482e"
"figma-domain-verification=7be03bce0220e1f36f952e70cd48a6091c0c9c7389c22e7d6c92af8b2f8aff0b-1756958901"
"MS=ms10087093"
"google-site-verification=fzyGqswFYTL_z4eJ_uLwdMUrVabq7WqEZBKhp5VedC0"
"notion-domain-verification=Edk7uCcxTTXtK5r2HGJaTPCzNRDBRIm4Ev0zTCWUPvl"

NS

4 record(s)

ns-1360.awsdns-42.org.
ns-958.awsdns-55.net.
ns-2039.awsdns-62.co.uk.
ns-274.awsdns-34.com.

SOA

1 record(s)

ns-2039.awsdns-62.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

SPF

Configured

v=spf1 include:_spf.google.com +ip4:210.232.13.224/27 +ip4:219.101.182.24/32 +ip4:118.238.217.217/32 +ip4:163.43.136.149/32 +ip4:153.125.144.148/32 +ip4:35.72.225.0/25 +ip4:106.185.100.0/23 +ip4:106.185.96.0/23 +ip4:106.185.98.0/23 +ip4:210.166.79.114/32 +ip4:165.76.142.193/32 +ip4:126.139.43.238/32 include:aspmx.pardot.com include:spf.protection.outlook.com include:spfd.protection.outlook.com include:spf-bma.mpme.jp ~all

DMARC

Configured

v=DMARC1; p=quarantine; rua=mailto:postmaster@kodansha.co.jp;

DKIM

Selector s1

k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuBXi39xKP383zU4VYHQNX4/k5rG8KZ5X9DwJQgjzTo91TNZzknrW/SZ28bPdtioS/v1yiofWJyrKW0fber/1qxCnNzpOWqykG7GLMkQqF/hfWrj9RxzV+XQHNq22LkQbyEENAIavieqsUWk7V8NM61MlWLGXjx4vOOHV0iadQQ36eXgUBVAAnxfwOCVxxYjc8vIsU8tgtNIMkghiibAlaLOQBylolX1YURKXorIfXxcAHxHFKMx8uEb3Kexl2n/IIQJdm8AehciL3vxWohTugIDDWnKG3+hnyi2Fwd9rcty6pIVfAQN3mxGuB2xNJokd1pUi1x00Lrhf2aEdGJt9EwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

講談社「おもしろくて、ためになる」を世界へ

Description

Final URL

https://www.kodansha.co.jp/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.kodansha.co.jp/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Amazon

kodansha.co.jp

Valid from

2025-12-09T18:00:00-06:00

Valid until

2027-01-08T17:59:59-06:00

Days remaining

151

Protocol

TLSv1.3

Cipher

TLS_AES_128_GCM_SHA256

Security headers

7 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

—

Permissions PolicyNot detected

✓

Cross-Origin-Opener-PolicyImplemented

—

Cross-Origin-Embedder-PolicyNot detected

✓

Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

13.231.99.251

98,91 ms

Cloudflare

1.1.1.1

13.231.99.251

66,30 ms

Quad9

9.9.9.9

13.231.99.251

43,81 ms

OpenDNS

208.67.222.222

13.231.99.251

56,07 ms

AdGuard

94.140.14.14

13.231.99.251

45,80 ms

IP, geolocation and ASNAssociated network information

13.231.99.251

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

alt2.aspmx.l.google.com

Port 25: Closed/unreachable - 0.7 ms - 
Port 465: Closed/unreachable - 4021.3 ms - 
Port 587: Closed/unreachable - 4021.2 ms -

Recently analyzed domains

View all →

dovecot.org97 enamad.ir42 letsgocasino.io66 webkit.org83 googletagmanager.com66 apnic.net95 go.id15 businessfrance.fr96 chiba.jp4 fl.us4