Security Analysis Results

jvns.ca

Comprehensive domain security and infrastructure analysis

Live Website Preview

website screenshot of https://jvns.ca/blog/2021/12/06/dns-doesn-t-propagate/

No Security Risks Detected

This domain appears to be safe and secure

100%
Score

Disclaimer: This assessment is based on automated analysis of publicly available information. Results are for informational purposes only. For critical applications, consult security professionals.

Scan Information

Last checked:June 19, 2025 14:32:22
Scan Complete

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Page Information

Target URL
https://jvns.ca/blog/2021/12/06/dns-doesn-t-propagate/
Page Title
DNS "propagation" is actually caches expiring
jvns.ca faviconSite Favicon
Status
Active

Host Information

Domain
jvns.ca
Server
Netlify
Country
United States
IP Address
75.2.60.5
ASN Information
16509
AMAZON-02

Technologies

KaTeX logo
KaTeX
JavaScript graphics
Twitter logo
Twitter
Widgets
Netlify logo
Netlify
PaaS
jsDelivr logo
jsDelivr
CDN
Heap logo
Heap
Analytics
HSTS logo
HSTS
Security

SSL Certificate

HTTPS Enabled
Secure
Certificate Issuer
E6
Valid From
2025-04-21 22:53:44
Valid Until
2025-07-20 22:53:43
Subject Name
jvns.ca

Performance Statistics

18
Total Requests
6
Domains
6
IP Addresses
199.28 KB
Transfer Size
Content Size591.36 KB

HTTP Headers

accept-ranges
bytes
age
0
cache-control
public,max-age=0,must-revalidate
cache-status
"Netlify Edge"; fwd=miss
content-encoding
br
content-type
text/html; charset=UTF-8
date
Thu, 19 Jun 2025 14:32:30 GMT
etag
"26f33e44a167788dd145ddb831940dfb-ssl-df"
server
Netlify
strict-transport-security
max-age=31536000
vary
Accept-Encoding
x-nf-request-id
01JY49P1ESE5V056DXN96PK117
12 headers detected

Technology Stack Analysis

KaTeX

KaTeX

JavaScript graphics

KaTeX is a cross-browser JavaScript library that displays mathematical notation in web browsers.

Twitter

Twitter

Widgets

Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.

Netlify

Netlify

PaaSCDN

Netlify providers hosting and server-less backend services for web applications and static websites.

jsDelivr

jsDelivr

CDN

JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.

Heap

Heap

Analytics

Heap is an analytics platform.

HSTS

HSTS

Security

HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.

Website Cookies 2

_hp2_ses_props.2242143965

.jvns.ca

Secure None
Value
%7B%22ts%22%3A1750343551072%2C%22d%22%3A%22jvns.ca%22%2C%22h%22%3A%22%2Fblog%2F2021%2F12%2F06%2Fdns-doesn-t-propagate%2F%22%7D
Expires:6/19/2025

_hp2_id.2242143965

.jvns.ca

Secure None
Value
%7B%22userId%22%3A%226154860540608421%22%2C%22pageviewId%22%3A%221292259775114629%22%2C%22sessionId%22%3A%223362443572714004%22%2C%22identity%22%3Anull%2C%22trackerVersion%22%3A%224.0%22%7D
Expires:7/19/2026

External Links 10

Github

github.com

Analyze
Target URL
https://github.com/jvns

Zines

wizardzines.com

Analyze
Target URL
https://wizardzines.com

tweeted this

twitter.com

Analyze
Target URL
https://twitter.com/b0rk/status/1467585993138229248

December 5, 2021

twitter.com

Analyze
Target URL
https://twitter.com/b0rk/status/1467585993138229248?ref_src=twsrc%5Etfw

RFC for negative caching

www.rfc-editor.org

Analyze
Target URL
https://www.rfc-editor.org/rfc/rfc2308

“flush cache” feature

developers.google.com

Analyze
Target URL
https://developers.google.com/speed/public-dns/cache

DNS propagation does not exist

www.nslookup.io

Analyze
Target URL
https://www.nslookup.io/blog/dns-propagation-does-not-exist/

DNS propagation checker

www.whatsmydns.net

Analyze
Target URL
https://www.whatsmydns.net/#

Ulia Ea

web.archive.org

Analyze
Target URL
https://web.archive.org/web/20181228051203/http://www.uliaea.ca/

Recurse Center

www.recurse.com

Analyze
Target URL
https://www.recurse.com/scout/click?t=546ea46360584b522270b8c3e5d830f8

Requested Domains 6

cdn.heapanalytics.com

Unknown Type
No category information available

cdn.jsdelivr.net

Unknown Type
No category information available

heapanalytics.com

Unknown Type
No category information available

jvns.ca

Unknown Type
No category information available

platform.twitter.com

Unknown Type
No category information available

plausible.io

Unknown Type
No category information available
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