Website reputation report

regular-expressions.info

Last checked 1 day ago · Point-in-time assessment

● Evidence is limited

What is this website?

Public pages were observed on regular-expressions.info, but their subject was not confidently classified. An About page was also found. The sampled pages were marked as English-language. Recurring page-metadata topics include reference, reference table of, tutorial.

No listed local patterns observedHomepage-only analysis is not a malware clearance. Read the scope and findings below.

73/100Safety Score
75%Evidence Confidence
Trust Radar evidence profile Eight evidence dimensions from zero to one hundred. Exact values surround the chart. Threat Intelligence55 Domain History95 Infrastructure90 Website Security95 Security Hygiene60 Transparency54 Reputation50 Operational Stability85
Trust RadarEight observed factors. Select one to inspect its evidence.

How to read this report

Safety Score evaluates observed signals. Evidence Confidence measures how complete, direct, fresh, and consistent those signals are.

No automated scan can guarantee that a website is safe.

Independent evidence brief

What we observed about regular-expressions.info

Updated Sep 29, 2026

The latest scan examined 10 public pages on regular-expressions.info. Website descriptions below come from the site itself. Registration, connection and threat findings were checked separately.

Purpose and visible content

On its homepage, the site says: At Regular-Expressions.info you will find a wide range of in-depth information about a powerful search pattern language called regular expressions.

Registrar and domain history

Registered on Dec 26, 2002. Registrar: NameCheap, Inc..

Recorded expiry date: Dec 26, 2035. Registry data can change.

Connection and hosting evidence

The checked homepage returned HTTP 200 in about 1000 ms.

A valid TLS certificate was observed, expiring Nov 28, 2026.

Threat checks and score context

External malware-provider coverage was unavailable. The report does not treat this missing check as a clean result.

Safety Score: 73/100. Evidence Confidence: 75%. These measure different things.

Public content profile

Pages reviewed on regular-expressions.info

10 of up to 10 pages

We sampled public pages from this website to understand its subject and contact paths. The titles and short descriptions below come from the website itself. They are not endorsements or independent safety findings.

Regular-Expressions.info - Regex Tutorial, Examples and Reference - Regexp PatternsAt Regular-Expressions.info you will find a wide range of in-depth information about a powerful search pattern language called regular expressions. About www.regular-expressions.info - The Complete Regex websitehttps://www.regular-expressions.info/about.html RSS Feed for Site UpdatesStay up-to-date with changes and new additions to the web’s premier site about regular expressions. Gives direct links to the relevant pages on the site. Regular Expressions Quick Starthttps://www.regular-expressions.info/quickstart.html Regular Expression Tutorial - Learn How to Use Regular ExpressionsThis tutorial teaches you how to create your own regular expressions, starting with the most basic regex concepts and ending with the most advanced and specialized capabilities. Replacement Text Tutorialhttps://www.regular-expressions.info/replacetutorial.html Popular Tools, Utilities and Programming Languages That Support Regular ExpressionsA list of popular tools, utilities and programming languages that provide support for regular expressions, and tips for using them Regular Expression Exampleshttps://www.regular-expressions.info/examples.html Regular Expressions Reference Table of ContentsReference of the various syntactic elements that can appear in regular expressions Replacement Strings Reference Table of ContentsCompare the replacement text syntax and features supported by all the major regular expression flavors, including .NET, Java, Perl, PCRE, JavaScript, Python, Ruby, POSIX, etc.

Public page evidence

Topics and keywords observed on regular-expressions.info

12 phrases

These phrases were extracted locally from sampled public page metadata. They are observations, not search-volume or ranking estimates.

referenceTitle, H1, Meta description3 sampled pages
reference table ofTitle, H12 sampled pages
tutorialTitle, H1, Meta description3 sampled pages
of contentsTitle, H12 sampled pages
replacementTitle, H1, Meta description2 sampled pages
replacement stringsTitle, H12 sampled pages
expressionTitle, Meta description3 sampled pages
regexTitle, Meta description3 sampled pages
premierH1, Meta description3 sampled pages
infothe premierH12 sampled pages
thatTitle, Meta description2 sampled pages
replacement textTitle, Meta description2 sampled pages

At a glance

Key findings

✓

Report is current

The displayed evidence comes from the published immutable scan.

i

Confidence is separate

Unavailable evidence is shown as missing and never counted as clean.

!

Verify before sensitive actions

Check the exact URL and context before payments, credentials, or downloads.

Fully explainable

Why this score?

Versioned weights
Threat IntelligenceWeight 25%
55/100

Threat providers were unavailable. The neutral uncertainty baseline is not a clean verdict.

Domain HistoryWeight 10%
95/100

Domain registration age and expiry were checked.

InfrastructureWeight 10%
90/100

Observed DNS records and network address were checked.

Website SecurityWeight 15%
95/100

Observed certificate validity and TLS protocol were checked.

Security HygieneWeight 15%
60/100

Observed security header values were checked for basic protective settings. Empty values, disabled HSTS and unrecognized values receive no credit. This is not a complete browser-policy validation.

TransparencyWeight 5%
54/100

Observed site metadata and About page were checked. Publisher-supplied details are not independently verified.

ReputationWeight 5%
50/100

Popularity is weak context, not proof of safety. Unranked sites use a neutral baseline.

Operational StabilityWeight 15%
85/100

Observed HTTP status and final connection scheme were checked.

Server-side analysis

Automated security checks

Local antivirus and phishing checks

ClamAV · homepage HTMLNo signature match in the sampled HTML
Engine version1.5.4
Signature database date (UTC)2026-09-29T06:26:15+00:00
HTML bytes submitted13,269
Phishing.Database · exact hostnameNot listed in this snapshot
Feed downloaded (UTC)2026-09-29T18:00:06+00:00
Hosts in local snapshot386,017

Sampled scripts and pages

Resource analysis incomplete

3 resources checked · 1 script links observed on the homepage. Partial resource coverage.

ClamAV inspects the fetched homepage HTML on our server. New scans also sample up to four linked scripts and two collected internal pages, with size and time limits. Scripts are not executed. Other downloads, private server files and logged-in pages remain outside this check. A signature match needs investigation and can be a false positive. No match is not a whole-site safety guarantee.

Exact hostname lookup uses a downloaded Phishing.Database snapshot. It does not send this domain to an external lookup API or mark sibling subdomains as harmful. Not listed does not mean safe. Snapshot age is download age, not proof that every entry was recently revalidated.

Homepage HTML only · Eight local rule families · local-security-v2

Checks use the fetched page and redirect chain. Scripts are not executed, forms are not submitted, and linked files are not downloaded. This is not a malware clearance.

Page resource inventory

Linked scripts1
Inline scripts1
Embedded frames0
External script hosts0

Counts describe the sampled HTML, not every resource loaded by the browser. External resources are common and are not automatically harmful.

No listed local patterns observed. The limited rule set cannot detect every threat or behavior.

External threat intelligence

Provider coverageNot checked

Local checks do not query external reputation databases. An unavailable check is never a clean result.

Registration

Domain information

Public RDAP observation
Canonical domainregular-expressions.info
RegistrarNameCheap, Inc.
RegisteredDec 26, 2002
Domain age23 years
ExpiresDec 26, 2035
Registry statusesactive
Report statePublished

Infrastructure

Network & hosting

Observed endpoint, not legal location
IP address216.92.20.37
Autonomous systemUnavailable
Network organizationUnavailable
Observed countryUnavailable
CDNNot detected
Web application firewallNot detected

At a glance

Infrastructure summary

Observed during this scan

A compact view of the connection, DNS and security surface. These observations describe what the scanner could verify at scan time and do not prove ownership or ongoing availability.

HTTP response200 · https://www.regular-expressions.info/
Endpoint216.92.20.37
NetworkUnavailable
CDN and WAFNot detected · Not detected
DNS surface6 records · 2 nameservers · 1 mail exchangers
Protection signals3 security headers · 1 technologies · DNSSEC unknown

Page telemetry

Observed page statistics

Safe metadata only

These counters describe the fetched response and sampled HTML. Script counts describe references in the markup, not a complete browser network log. Cookie counts cover observed response headers.

Response size13,269 bytes
HTTP check duration1,000 ms
Cookies observedUnavailable
Script resources1 · 0 external hosts
Frames and sampled checks0 frames · 3 resources checked

Encrypted transport

TLS certificate

Valid when observed
StatusValid when observed
ProtocolTLSv1.3
IssuercountryName=US, organizationName=Let's Encrypt, commonName=YR1
Valid fromAug 30, 2026
Valid untilNov 28, 2026
Certificate namesregular-expressions.info · www.regular-expressions.info

Resolution

DNS footprint

DNSKEY status unknown

DNSKEY presence does not verify the DNSSEC signature chain. Missing records can mean no record was returned or the lookup was unavailable.

A216.92.20.37TTL —
NSdns4.pair.comTTL —
NSns0000.ns0.comTTL —
MX50 mailwash62.pair.comTTL —
CAA0 issue "letsencrypt.org"TTL —
TXTv=spf1 include:webmail.pair.com include:relay.pair.com include:pairlist.com a:vps507.pairvps.com a:mailwash62.pair.com -allTTL —

DNS observations · no external lookup API

Domain email protection

Exact-host SPF and DMARC observations help the owner investigate email impersonation risks. They are separate from website malware checks and do not change the Safety Score.

SPFPolicy record observed, not fully validated
DMARCNo matching record returned for this exact hostname

What to do next

Review the records with your mail administrator. Inventory legitimate senders and test SPF and DKIM alignment before enforcing a stricter DMARC policy. Fix duplicate records and investigate overly permissive SPF rules.

This bounded check does not send email, probe SMTP, evaluate recursive SPF includes, verify DKIM signatures or apply organizational-domain DMARC inheritance. A missing subdomain record does not prove that no inherited protection exists. A DNS timeout is unknown, not an absent record. A policy record is not proof that messages authenticate successfully.

Responsible disclosure

security.txt

RFC 9116 observation

No readable security.txt file was observed at the standard locations. This is informational and is not evidence of malware.

Browser protections

Security headers

3 observed
content-security-policypresent frame-ancestors 'self';
strict-transport-securitypresent max-age=31536000
x-content-type-optionspresent nosniff

Response headers

Cookie protections

Passive observation

No Set-Cookie header was observed on the sampled homepage response. Other pages may set cookies separately.

Detected stack

Technologies

Apache HTTP Server 93%

Versions are shown only when publicly exposed by the page or response headers. An observed version is not, by itself, proof of a vulnerability.

JavaScript library advisories

1 sampled JavaScript files checked locally with Retire.js. Database snapshot: 2026-09-29T02:40:05.559Z.

No supported library version was identified in the sampled files. This does not establish that the scripts are safe.

A version match is not proof that the website is infected or that an issue is exploitable here. Owners should review the advisory, check whether their code is affected and test an update. Up to four external script files are sampled, not every dependency, inline script or dynamically loaded resource.

Recommended maintenance checks

Apache HTTP ServerReview the Apache branch and keep security patches current. Avoid exposing detailed server version headers.

About this website

What the site says about itself

Welcome to Regular-Expressions.infoThe Premier website about Regular Expressions

View the site's About page ↗

This is publisher supplied information. The independent safety findings are shown separately.

Structured facts

Website identity & response

Public page metadata
Page titleRegular-Expressions.info - Regex Tutorial, Examples and Reference - Regexp Patterns
First headingWelcome to Regular-Expressions.infoThe Premier website about Regular Expressions
DescriptionAt Regular-Expressions.info you will find a wide range of in-depth information about a powerful search pattern language called regular expressions.
Canonical URLhttps://www.regular-expressions.info/
Final URLhttps://www.regular-expressions.info/
HTTP response200 · text/html; charset=UTF-8 · 1000 ms
Languageen
Structured typesNone observed
Page page detectedhttps://www.regular-expressions.info/updates.htmlAbout page detectedhttps://www.regular-expressions.info/about.html
missing100% evidence confidence
1100% evidence confidence
en100% evidence confidence
1100% evidence confidence
Local headers.cors credentials with wildcard100% evidence confidence
6100% evidence confidence
2100% evidence confidence
1100% evidence confidence
unavailable100% evidence confidence
Dns consistency.cname present100% evidence confidence
Local headers.csp wildcard sources100% evidence confidence
Local headers.permissions policy present100% evidence confidence
1100% evidence confidence
Local headers.hsts preload100% evidence confidence
31536000100% evidence confidence
Local headers.hsts include subdomains100% evidence confidence
1100% evidence confidence
Local headers.csp unsafe inline100% evidence confidence
Local headers.csp unsafe eval100% evidence confidence
1100% evidence confidence
Local headers.csp has object src100% evidence confidence
Local headers.csp has default src100% evidence confidence
Local headers.cors wildcard origin100% evidence confidence
Local headers.cors present100% evidence confidence

Connection path

Redirect chain

1 recorded hops
Hop 1https://www.regular-expressions.info/

The chain is shown exactly as observed by the scanner. A redirect is not itself a malware finding, but unexpected domains or an HTTP downgrade deserve review.

Premium monitoring

Catch downtime and security changes automatically

Regular checks, availability history, and alert emails are reserved for Premium websites. Free reports remain point-in-time scans and do not create recurring server work.

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Compared with the previous scan

What changed

A comparison will appear after the next completed scan.

Explainable matching

Digital fingerprint

fingerprint-v1
quiet-radar-path-305

Comparable components help find technically related websites. A match does not prove common ownership.

DnsHashed private comparison value
TechnologiesHashed private comparison value

Material changes only

Change history

No meaningful changes recorded yet.

Website icon for regular-expressions.info

Visual evidence

Website screenshot

Screenshot of regular-expressions.info
Captured once in an isolated browser during this scan. Visual tint is an interface overlay. The original evidence is not duplicated.

For site owners

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Questions about regular-expressions.info

FAQ

Still have questions? Contact us →
Is regular-expressions.info safe to visit?

The latest Safety Score is 73/100 with 75% Evidence Confidence. This is a point-in-time assessment of observed technical signals, not a guarantee. Check the exact address and avoid entering payment details if anything looks unusual.

Did the scan detect malware on regular-expressions.info?

ClamAV found no signature match in the sampled homepage HTML. External scripts, downloads and private server files were not checked. This is not a whole-site malware clearance.

When was regular-expressions.info registered?

The public registry record shows Dec 26, 2002. Registration details may be privacy-protected or updated later.

Did regular-expressions.info have a valid TLS certificate?

The scanner observed a valid TLS certificate using TLSv1.3. A valid certificate alone does not establish that the site is safe.

Can a paid listing change this website's score?

No. Premium placement and owner-supplied pages are labelled separately. Technical evidence, the Safety Score and moderation decisions remain independent.