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brainstellar.com

Puzzles from Quant Interviews

Other
No paid content found
Visit website
Profile views 7 Outbound visits 0 Normal
Brainstellar Puzzles from Quant Interviews Full homepage screenshot

At a glance

Category
Other
Language
English
Paid-content signal
No paid content foundObserved
Registered
2014
Hosting
FastlyInferred
HTTPS certificate trusted
PassedObserved
Last updated

Related questions

More questions →
What is brainstellar.com?
Puzzles from Quant Interviews
Does brainstellar.com offer paid content?
Unknown.
What languages does brainstellar.com support?
Primary language: English.
How can I visit brainstellar.com?
Use the Visit website link to open the website in a new tab.
What are some alternatives to brainstellar.com?
Unknown.

Website Overview

Identifiable technologies and additional version or configuration signals make the service easier to fingerprint, which may help targeted scanners narrow their checks. An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.

Domain and Registration

Registered in 2014, this domain has about 12 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is Cloudflare, Inc., a widely used domain service provider. The domain uses the common .com extension, which is not an independent safety signal.

DNS and Email

The observed email authentication setup is incomplete: DMARC is missing. Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Mailgun email service. No CNAME was found; the observed records resolve directly to addresses. DNSSEC signatures were not detected, so this additional DNS authenticity protection is not confirmed.

TLS and Certificates

The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued within the Google Trust Services cloud or CDN ecosystem. The certificate's total validity is about 90 days, consistent with a short renewal cycle.

HTTP and Browser Security

The checked browser-security headers were not detected, leaving fewer explicit browser-side safeguards. CORS permits any origin to read this response. This is common for public resources; sensitive responses need narrower handling. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray, x-cache, x-served-by, via response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers.

Technology Stack Analysis

The public page identifies Gatsby 5.14.0, Cloudflare, Fastly, with exact versions exposed for 1 technologies. These details can narrow vulnerability checks, although exposure alone is not a vulnerability.

Search and Social Sharing

The Generator tag identifies Gatsby 5.14.0, making the publishing system easier to fingerprint. No homepage canonical URL was detected. If duplicate URLs exist, consolidation may be less explicit. Twitter Card metadata is configured. The title has 42 characters, within a common display range. A meta description is present, with 29 characters.

Hosting and Email
DNSCloudflare
HostingFastly
EmailMailgun
Approximate IP geolocation (inferred; a CDN or proxy may differ from the origin server) Location unknown Inferred 104.21.49.242

Registration details

RDAP / WHOIS

RegistrarCloudflare, Inc.
Registered2014-08-03
Expires2027-08-03
Domain statusclient transfer prohibited
Nameserversanuj.ns.cloudflare.com、mary.ns.cloudflare.com
DNSSECunsigned

DNS records

DNS

TypeNameValueTTLPriority
Abrainstellar.com104.21.49.242300—
Abrainstellar.com172.67.196.50300—
AAAAbrainstellar.com2606:4700:3031::6815:31f2300—
AAAAbrainstellar.com2606:4700:3034::ac43:c432300—
MXbrainstellar.commxa.mailgun.org30010
MXbrainstellar.commxb.mailgun.org30010
NSbrainstellar.comanuj.ns.cloudflare.com86400—
NSbrainstellar.commary.ns.cloudflare.com86400—
TXTbrainstellar.comv=spf1 include:mailgun.org ~all300—

TLS and certificates

TLS / SSL

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subjectbrainstellar.com
IssuerGoogle Trust Services
Valid until2026-12-17T17:37 · Remaining when checked: 40 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HTTP

HeaderValue
content-typetext/html; charset=utf-8
cache-controlmax-age=600
servercloudflare
access-control-allow-origin*

Identified technologies
Gatsby 5.14.0CloudflareFastly

Pages, Search and Sharing
Meta descriptionPuzzles from Quant Interviews
Canonical URLNot detected
LanguageEnglish (default)
Twitter Cardsummary

Social Sharing Preview

8 fields

robots.txt (opens in a new tab)

33 rules
All bots 1 allowed · 0 disallowed
  • Allow/
amazonbot 0 allowed · 1 disallowed
  • Disallow/
applebot-extended 0 allowed · 1 disallowed
  • Disallow/
bytespider 0 allowed · 1 disallowed
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ccbot 0 allowed · 1 disallowed
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claudebot 0 allowed · 1 disallowed
  • Disallow/
diffbot 0 allowed · 1 disallowed
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google-extended 0 allowed · 1 disallowed
  • Disallow/
gptbot 0 allowed · 1 disallowed
  • Disallow/
omgili 0 allowed · 1 disallowed
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anthropic-ai 0 allowed · 1 disallowed
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claude-web 0 allowed · 1 disallowed
  • Disallow/
cohere-ai 0 allowed · 1 disallowed
  • Disallow/
mistralai-training 0 allowed · 1 disallowed
  • Disallow/
meta-externalagent 0 allowed · 1 disallowed
  • Disallow/
googleother 0 allowed · 1 disallowed
  • Disallow/
baiduspider 0 allowed · 1 disallowed
  • Disallow/
petalbot 0 allowed · 1 disallowed
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awariosmartbot 0 allowed · 1 disallowed
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awariorssbot 0 allowed · 1 disallowed
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google-cloudvertexbot 0 allowed · 1 disallowed
  • Disallow/
qualifiedbot 0 allowed · 1 disallowed
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cotoyogi 0 allowed · 1 disallowed
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icc-crawler 0 allowed · 1 disallowed
  • Disallow/
atlassian-bot 0 allowed · 1 disallowed
  • Disallow/
fishbot 0 allowed · 1 disallowed
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borderxbot 0 allowed · 1 disallowed
  • Disallow/
navubot 0 allowed · 1 disallowed
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semrushbot-swa 0 allowed · 1 disallowed
  • Disallow/
wardbot 0 allowed · 1 disallowed
  • Disallow/
magpie-crawler 0 allowed · 1 disallowed
  • Disallow/
kimibot 0 allowed · 1 disallowed
  • Disallow/
citibotsitecrawler 0 allowed · 1 disallowed
  • Disallow/

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