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79
Total
80
DNS
40
Email
88
Security
85
Network
100
Availability
Domainregex101.com
IPv41
IPv61
MX records1
StatusActive
Domain technical report

regex101: build, test, and debug regex

regex101.com

Online regex tester and debugger with real-time match highlighting, detailed explanations, substitutions, unit tests, benchmarking, and code generation. Supports PCRE2, JavaScript, Python, Go, Java, .NET, Rust, POSIX ERE, and POSIX BRE.

Generated: 2026-08-09T16:50:30-05:00 · Cached result

JSONCSVPDFVisit site
IPv41
IPv61
MX1
NS2

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

2 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

1 MX record(s).

!
SPF0 / 25 pts · Mail

SPF policy not found.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

✓
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.

i
HTTP security headers23 / 35 pts · Security

6 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: static.195.220.47.78.clients.your-server.de

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)
78.47.220.195

AAAA

1 record(s)
2a01:4f8:1c1c:13a4::1

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
1 smtp.google.com.

TXT

1 record(s)
"google-site-verification=e3kdGikhQf2oBB_SquqmSxSnG-lMK1_3i2dGXNBZprA"

NS

2 record(s)
dns2.registrar-servers.com.
dns1.registrar-servers.com.

SOA

1 record(s)
dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1784652915 43200 3600 604800 3601

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

Not configured
—

Not configured

DMARC

Not configured
—

Not configured

DKIM

Selector google
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArJTYP/ZNfVi8msuC/GYpwMtWjDOwdleSJfrMP2MLCx3OiERpY681cty2UQtxv/gZI2+r/a1dRPXzU3ABU/pdobVp3RmdHD73FXO99H03U3heiOoWqgTv/DbNsj/BRKOZmXf25WZ0Lc1j5cGU0/Hw/809b07cGFqbXshT2hYX/EOF6Hp9g7s4OFcmnLBicl15roAMok76xl1j6WgRJMmSJ4d0NLo+T5hde7PgU02GxI2Lax2cma1n2QfMK/XyXLRBQ27+G0ju3c/gC+mj7v1n23Re142vvcyLaXtWKHVJ8XswKv79bA5iomRnuhpyosh9Mirn/yJeq+0kVz6isXzPOQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
regex101: build, test, and debug regex
Description
Online regex tester and debugger with real-time match highlighting, detailed explanations, substitutions, unit tests, benchmarking, and code generation. Supports PCRE2, JavaScript, Python, Go, Java, .NET, Rust, POSIX ERE, and POSIX BRE.
Final URL
https://regex101.com/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://regex101.com/
Version
3
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
regex101.com
Valid from
2026-06-25T18:35:39-05:00
Valid until
2026-09-23T18:35:38-05:00
Days remaining
45
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

6 active
—
HSTSNot detected
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
—
Permissions PolicyNot detected
✓
Cross-Origin-Opener-PolicyImplemented
✓
Cross-Origin-Embedder-PolicyImplemented
—
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
78.47.220.195
51,67 ms
Cloudflare
1.1.1.1
78.47.220.195
46,32 ms
Quad9
9.9.9.9
78.47.220.195
81,91 ms
OpenDNS
208.67.222.222
78.47.220.195
117,22 ms
AdGuard
94.140.14.14
78.47.220.195
41,26 ms

IP, geolocation and ASNAssociated network information

78.47.220.195

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

smtp.google.com

Port 25: Closed/unreachable - 44 ms - 220 mx.google.com ESMTP 006d021491bc7-6b02bd935efsi6264288eaf.33 - gsmtp
Port 465: Closed/unreachable - 4032 ms - 
Port 587: Closed/unreachable - 4021.3 ms -

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