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80
Total
70
DNS
70
Email
84
Security
65
Network
100
Availability
Domainndl.go.jp
IPv42
IPv60
MX records2
StatusActive
Domain technical report

国立国会図書館

ndl.go.jp

国立国会図書館の公式ウェブサイトです。当館は、国内外の資料・情報を広く収集・保存して、知識・文化の基盤となり、国会の活動を補佐するとともに、行政・司法及び国民に図書館サービスを提供しています。

Generated: 2026-08-09T05:32:25-05:00 · Cached result

JSONCSVPDFVisit site
IPv42
IPv60
MX2
NS5

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

5 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

2 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

154 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers19 / 35 pts · Security

5 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: ae55ce89419fbc597.awsglobalaccelerator.com

✓
IPv4 diversity35 / 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

2 record(s)
75.2.78.160
166.117.141.228

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
10 tn-vmw-mgw0001.ndl.go.jp.
30 tn-vmw-mgw0002.ndl.go.jp.

TXT

1 record(s)
"v=spf1 +mx +ip4:153.231.248.161 +ip4:153.231.248.162 +ip4:153.231.248.169 +ip4:153.231.248.170 " "+ip4:202.32.173.188 +ip4:133.159.67.120 +ip4:133.159.67.68 +ip4:133.159.67.133 include:spf.dox.jp include:webcas.net include:asp.cuenote.jp -all"

NS

5 record(s)
ns.ndl.go.jp.
dns-a.iij.ad.jp.
ns3.ndl.go.jp.
ns4.ndl.go.jp.
ns2.ndl.go.jp.

SOA

1 record(s)
ndl.go.jp. postmaster.ndl.go.jp. 2026072401 3600 300 3600000 3600

CAA

0 record(s)
—

Not configured

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 +mx +ip4:153.231.248.161 +ip4:153.231.248.162 +ip4:153.231.248.169 +ip4:153.231.248.170 +ip4:202.32.173.188 +ip4:133.159.67.120 +ip4:133.159.67.68 +ip4:133.159.67.133 include:spf.dox.jp include:webcas.net include:asp.cuenote.jp -all

DMARC

Configured
v=DMARC1; p=none; rua=mailto:dmarc-reports@ndl.go.jp; ruf=mailto:dmarc-reports@ndl.go.jp

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
国立国会図書館
Description
国立国会図書館の公式ウェブサイトです。当館は、国内外の資料・情報を広く収集・保存して、知識・文化の基盤となり、国会の活動を補佐するとともに、行政・司法及び国民に図書館サービスを提供しています。
Final URL
https://www.ndl.go.jp:443/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.ndl.go.jp:443/
Version
3
Server
awselb/2.0
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
ndl.go.jp
Valid from
2025-12-11T18:00:00-06:00
Valid until
2027-01-10T17:59:59-06:00
Days remaining
154
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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
166.117.141.228, 75.2.78.160
248,47 ms
Cloudflare
1.1.1.1
166.117.141.228, 75.2.78.160
202,01 ms
Quad9
9.9.9.9
166.117.141.228, 75.2.78.160
213,26 ms
OpenDNS
208.67.222.222
166.117.141.228, 75.2.78.160
249,00 ms
AdGuard
94.140.14.14
166.117.141.228, 75.2.78.160
240,90 ms

IP, geolocation and ASNAssociated network information

75.2.78.160

No data
success
No
country
region
city
asn
organization
isp

166.117.141.228

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

tn-vmw-mgw0001.ndl.go.jp

Port 25: Closed/unreachable - 69.5 ms - 
Port 465: Closed/unreachable - 4097.3 ms - 
Port 587: Closed/unreachable - 4018.6 ms -

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