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96
Total
100
DNS
100
Email
88
Security
85
Network
100
Availability
Domainsidn.nl
IPv41
IPv61
MX records1
StatusActive
Domain technical report

Zorgeloos online | SIDN

sidn.nl

Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.

Generated: 2026-08-11T19:51:00-05:00 · Cached result

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IPv41
IPv61
MX1
NS3

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

3 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 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-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

86 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers23 / 35 pts · Security

6 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: 63.90.111.34.bc.googleusercontent.com

i
IPv4 diversity20 / 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

1 record(s)
34.111.90.63

AAAA

1 record(s)
2600:1901:0:8ca2::

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 sidn-nl.v-v1.mx.microsoft.

TXT

7 record(s)
"google-site-verification=UgJBr_GdHnW8WlMHFlo59LLMiNz0g-T3g6ijOs7KBWE"
"v=spf1 a:ops-relay03-p.sidn.nl a:ops-relay04-p.sidn.nl a:ops-relayf03-p.sidn.nl a:ops-relayf04-p.sidn.nl a:ops-monext02-p.sidn.nl ip4:94.198.154.51 include:spf.protection.outlook.com ~all"
"HARICA-VFdR5pRm5ZpLvvWrNmw"
"b49e83a3cf3f49b49be0ceea668e8457"
"DomainVerification=94J3KBJIL96UFC6L3FMIHJ07M95PUUE5CZKNBBDKJOH2PYF1MQGVQRDA0ZIE58II"
"apple-domain-verification=VfW6PNm8hVwB49dm"
"google-site-verification=nGdTpBOjSS2sHxxqhEE9Tj3xcK5X4-lF9YLqtYmXbwI"

NS

3 record(s)
ns2.sidn.nl.
ns3.sidn.nl.
ns1.sidn.nl.

SOA

1 record(s)
ns3.sidn.nl. hostmaster.sidn.nl. 1784213127 14400 3600 3456000 300

CAA

8 record(s)
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuemail "harica.gr"
0 iodef "mailto:abuse@sidn.nl"
0 issue "quovadisglobal.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issue "harica.gr"
0 issue "letsencrypt.org"
0 issue "sectigo.com"

DS

1 record(s)
62949 13 2 FBF66B8D019C1EEC2779B7DBFBFF090CA0F3704DCBD8D76AA8097418 6F110E91

DNSKEY

2 record(s)
256 3 13 1WutjHCfbCeywwKSKsMl0vQA5fufsVYXRpPCw54skU9iCJQrbwsCH53g 71HsBn1TwGLfJbF53oordPG/Z7Hzmw==
257 3 13 jh1pVS3yzgJk4lM9fEtwS5V+nbISmn8AmGZAdY0T1o4351IQEBd/v518 tl00YmQL5Mq26YLE8RGKIOCXAYzWiQ==

RRSIG

3 record(s)
A 13 2 3600 20260820000000 20260730000000 30794 sidn.nl. FPhtQZQjQI6xI7XMC/QDu6F7xn1lmHK42pa1UHazy5gFSmWvumwn1EYd In61Aj6k8S/QxkGMY2odB28Te45uAQ==
AAAA 13 2 3600 20260820000000 20260730000000 30794 sidn.nl. e41CS/M/aLJ6gnIdYruDiW95ZsPZdgYNba50AniHamZ+UdXar7bUs2vf ficfdazzln/kcLJpwKDB7RMZS/dkiA==
DS 13 2 3600 20260904202139 20260808013854 467 nl. 0Gq58RkRw4jaRnaTmbd6SA4JzYShAn7AAgh3A7LQXC27R0Er9tA3ZjZN XWJOKyAmPA1WR9GQWnWBqC55og5+Hg==

NSEC

1 record(s)
default._bimi.sidn.nl. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY HTTPS 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 a:ops-relay03-p.sidn.nl a:ops-relay04-p.sidn.nl a:ops-relayf03-p.sidn.nl a:ops-relayf04-p.sidn.nl a:ops-monext02-p.sidn.nl ip4:94.198.154.51 include:spf.protection.outlook.com ~all

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:dmarc@sidn.nl,mailto:dmarc@sidn-nl.uriports.com; adkim=r; aspf=r; np=reject; psd=n; t=n; sp=reject

DKIM

Selector selector2
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCuMPlm/E5oKfgNadgsujyLzj7h87lvQ1z1ruYSDClHkADvAAFCrG4Y7AYWf9xtGoJiKjmQoSIO5IkjihavU2lRp/VgXLZBHgREaVA9L3wfgjZC9Dm1ETaMuvbhd6+2sJ/Z/xXbWjHoMWyhPzPqDeisg9Vaf9g6+umpnvsnwARy1QIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Zorgeloos online | SIDN
Description
Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.
Final URL
https://www.sidn.nl/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.sidn.nl/
Version
3
Server
openresty
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Hellenic Academic and Research Institutions CA
CN
sidn.nl
Valid from
2025-11-06T08:21:37-06:00
Valid until
2026-11-06T08:21:37-06:00
Days remaining
86
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

6 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
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
34.111.90.63
112,41 ms
Cloudflare
1.1.1.1
34.111.90.63
56,27 ms
Quad9
9.9.9.9
34.111.90.63
39,86 ms
OpenDNS
208.67.222.222
34.111.90.63
50,60 ms
AdGuard
94.140.14.14
34.111.90.63
278,00 ms

IP, geolocation and ASNAssociated network information

34.111.90.63

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.216.212
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

sidn-nl.v-v1.mx.microsoft

Port 25: Closed/unreachable - 19.1 ms - 
Port 465: Closed/unreachable - 4038.3 ms - 
Port 587: Closed/unreachable - 4021.3 ms -

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