Location
United States
Country level only
Domain
jlopes.eu
Served through Cloudflare's network, which answers from the location nearest each visitor.
Still looking this up. This tab fills in as the answers arrive.
Network Every network on the internet has an autonomous system number (ASN). This is the one that announces this address.
AS13335Cloudflare
Cloudflare, Inc.
BGP prefixPrefix The block of addresses this IP is announced in to the rest of the internet. RPKI valid means the block's owner signed off on the network announcing it.
RPKI valid172.67.144.0/20
Seen by 3,437 peers
Latency Round trip for an HTTPS request from your browser to the site and back, including the server's reply time.
Live— ms
Measuring from your browser…
At a glance
Route
Finding a probe near you…
Networks crossed
Each network is an autonomous system (AS). Your traffic is handed from one to the next where they connect, following
the routes BGP advertises.
- AS16509Anthropic, PBC
- AS13335Cloudflare
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
Protected from spoofing
Mail that fails its checks is sent to spam under jlopes.eu's DMARC policy, so forged mail doesn't reach inboxes.
- Receives mail
- Google Workspace
- Mail servers
- aspmx.l.google.comalt1.aspmx.l.google.comalt2.aspmx.l.google.com+2 more
- SPFLists the servers allowed to send mail for the domain. Receivers check it against the sending server.
- Soft-fails everything else3 of 10 DNS lookups · includes _spf.google.com
- DMARCTells receivers what to do with mail that fails SPF and DKIM: nothing (none), spam folder (quarantine) or reject.
- Quarantinesends reports
- MTA-STSRequires other mail servers to use encrypted connections (TLS) when delivering to this domain.
- Not published
- TLS reportsAsks other mail servers to report failed encrypted deliveries (TLS-RPT).
- Not requested
- BIMIA brand logo that some mail apps show next to authenticated mail from the domain.
- Not published
DNS records
TypeNameValueTTL
Ajlopes.eu172.67.151.1365 min
Ajlopes.eu104.21.90.265 min
AAAAjlopes.eu2606:4700:3030::ac43:97885 min
AAAAjlopes.eu2606:4700:3037::6815:5a1a5 min
NSjlopes.euamy.ns.cloudflare.com1 day
NSjlopes.euivan.ns.cloudflare.com1 day
MXjlopes.eu1 aspmx.l.google.com5 min
MXjlopes.eu10 alt3.aspmx.l.google.com5 min
MXjlopes.eu10 alt4.aspmx.l.google.com5 min
MXjlopes.eu5 alt1.aspmx.l.google.com5 min
MXjlopes.eu5 alt2.aspmx.l.google.com5 min
TXTjlopes.eu"google-site-verification=NJ06Z7W4bCBatokU4-YzZbTJRw2zqJmUNgNIayrrQeY"5 min
TXTjlopes.eu"google-site-verification=gHymy-UfLlQoWWCZeytDV87ZgHvrbippJTTDriwD7sY"5 min
TXTjlopes.eu"v=spf1 +a +mx include:_spf.google.com ~all"5 min
TXT_dmarc.jlopes.eu"v=DMARC1; p=quarantine; rua=mailto:36c38306066d4ec3ba47895a80509cfd@dmarc-reports.cloudflare.net"5 min
HTTPSjlopes.eu1 . alpn=h3,h2 ipv4hint=104.21.90.26,172.67.151.136 ech=AEX+DQBBswAgACA7vbh3OjLu0zE/dU5VpMjKveo+msuIE/vrYvGnOH4gRwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:9788,2606:4700:3037::6815:5a1a5 min
Details
Network
- IPv4
- 172.67.151.136
- ASNThe autonomous system number of the network that announces this address.
- AS13335
- Operator
- Cloudflare, Inc.
- CDNFrom the provider's own published list of its address ranges.
- Cloudflare
- PrefixThe block of addresses announced over BGP that contains this address.
- 172.67.144.0/20
- RPKIWhether a signed record (ROA) authorizes this network to announce this prefix.
- Valid
- VisibilityHow many bgp.tools peers carry this announcement.
- 3,437 peers
- Type
- Content
- Registry
- ARIN
Location
Country level- Country
- United States
- Continent
- North America
Registration
WHOIS- Registrar
- Name: Tucows.com Co.
- Registrant
- NOT DISCLOSED!
Website
Page
J Lopes | Frontend Developer: TypeScript, React, Astro
Portfolio of J Lopes, frontend developer and creative problem-solver, living between design and development. Explore my works, experimental tools and writings.
- Language
- English
- Theme color
- #000000
Built with
- CloudFrom the provider's published address ranges.
- Cloudflare
- CDN
- Cloudflarecf-ray header
- Framework
- Astropage markup
Tech stack
Built with Each entry says what gave it away: a response header, a cookie's name, an asset's path or file name, or markup the tool leaves in the page. Versions are checked against endoflife.date's support schedules and, for JavaScript packages, OSV's vulnerability database, which carries GitHub's security advisories.
CDN & edge
- Cloudflare
cf-ray header
Framework
- Astro
page markup
Fonts
- Recursive
self-hosted font
How it's made
- RenderingPrerendered pages are built ahead of time and served as files. Pages rendered on each request are built by server code for every visitor. Pages drawn in the browser arrive nearly empty and depend on JavaScript, which most AI crawlers don't run. Islands are interactive parts in otherwise static HTML.
- Static HTML with islands2 interactive islands in otherwise static HTML
- IslandsAstro islands: components that load their JavaScript separately, each at the moment its client directive says.
- 2 in the browser only
- Edge cacheWhether a CDN or proxy answered heade.rs's request from its cache, and how long ago that copy was made (the Age header).
- Served from cacheCloudflare
- Cache-Control
- public, max-age=0, must-revalidate
- HTML
- 56.0 KB
- Scripts
- 2 files · 15 inlineall from this site · 2 modules
Code from other sites Scripts a page loads from another domain run with the same power as its own code: they can read what visitors type and change the page. heade.rs checks what the HTML loads, not what tag managers add once they run.
The HTML loads no scripts from other sites.
HTTPS
Certificate
Valid- Issuer
- Google Trust Services
- Issuing CA
- WE1
- Covers
- *.convert.jlopes.eu, convert.jlopes.eu, jlopes.eu
- Also validOther unexpired certificates for this name, found in Certificate Transparency logs.
- 21 more certificates
Oct 9, 202685 days leftJan 7, 2027
From Certificate Transparency logs, via Cert Spotter.
Security
A+- HSTSStrict-Transport-Security makes browsers refuse plain HTTP to this site. Preloaded sites are HTTPS-only even on a first visit.
- 1 year · with subdomains
- HTTP → HTTPSWhether the plain http:// address redirects visitors to the secure one.
- Doesn't redirect
- HTTP/3The newest HTTP, over QUIC. Announced in the alt-svc header or the domain's HTTPS DNS record.
- Available
- Encrypted helloEncrypted Client Hello (ECH) hides which site you're visiting from anyone watching the connection.
- Supported
- CAADNS records naming the only certificate authorities allowed to issue certificates for the domain.
- Any CA may issue
- security.txtA standard file (RFC 9116) telling security researchers how to report vulnerabilities.
- Not published
Security headers 7 of 7
- HSTSpresent
- CSPpresent
- Framingpresent
- No sniffingpresent
- Referrerpresent
- Permissionspresent
- Isolationpresent
Response
200 OK111 ms from CMH · 56.0 KBDNS lookup27 ms
200 jlopes.eu111 ms
DNSConnect (TCP + TLS)Waiting for the replyFrom Cloudflare's CMH data center
Response headers
- cache-control
- public, max-age=0, must-revalidate
- cf-cache-status
- HIT
- cf-ray
- a4a8a4698c1a3f27-CMH
- connection
- close
- content-length
- 57302
- content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' https://static.cloudflareinsights.com data:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; img-src 'self' data: blob: https:; font-src 'self' data: https://fonts.gstatic… Show all
default-src 'self'; script-src 'self' 'unsafe-inline' https://static.cloudflareinsights.com data:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; img-src 'self' data: blob: https:; font-src 'self' data: https://fonts.gstatic.com; connect-src 'self' https://api.iconify.design https://ipapi.co https://*.open-meteo.com https://api.rainviewer.com https://cloudflareinsights.com https://plc.directory https://bluesky.nickthesick.com https://webmention.io https://constellation.microcosm.blue https://api.github.com https://*.host.bsky.network https://public.api.bsky.app https://bsky.social https://api.unsplash.com; frame-src https://codepen.io https://www.youtube-nocookie.com https://player.vimeo.com https://*.jlopes.eu https://offeringofpie.github.io; media-src 'self' https:; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none'; upgrade-insecure-requests- content-type
- text/html
- cross-origin-opener-policy
- same-origin
- cross-origin-resource-policy
- same-site
- date
- Wed, 14 Oct 2026 18:28:09 GMT
- etag
- "356fecdcf0e7ba7e1701b32f945ba43d"
- link
<https://jlopes.eu/sitemap-index.xml>; rel="sitemap", <https://jlopes.eu/llms.txt>; rel="alternate"; type="text/plain", <https://jlopes.eu/llms-full.txt>; rel="alternate"; type="text/plain", <https://jlopes.eu/rss.xml>; rel="alternate"; typ… Show all
<https://jlopes.eu/sitemap-index.xml>; rel="sitemap", <https://jlopes.eu/llms.txt>; rel="alternate"; type="text/plain", <https://jlopes.eu/llms-full.txt>; rel="alternate"; type="text/plain", <https://jlopes.eu/rss.xml>; rel="alternate"; type="application/rss+xml", <https://jlopes.eu/.well-known/api-catalog>; rel="api-catalog", <https://jlopes.eu/openapi.json>; rel="service-desc"; type="application/openapi+json", <https://jlopes.eu/.well-known/agent-skills/index.json>; rel="describedby", <https://jlopes.eu/.well-known/mcp/server-card.json>; rel="describedby"- nel
- {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
- no-vary-search
- params=("utm_source" "utm_medium" "utm_campaign" "utm_term" "utm_content" "ref" "fbclid" "gclid")
- permissions-policy
- camera=(), microphone=(), geolocation=()
- referrer-policy
- strict-origin-when-cross-origin
- report-to
{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=nkXJ1V6cfABcQSFSNM%2BZsAgjPo0z9uQIhuSunW0XnGDfqqEh3VZZ4OpKydFYaA8ZBx%2BdE3AEVidYdid%2BXqsMbgWf8Hjc9UWYj7DWJFF%2BVZlsod2JMcy22gFU0jlPe7RCv%2BLUQ… Show all
{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=nkXJ1V6cfABcQSFSNM%2BZsAgjPo0z9uQIhuSunW0XnGDfqqEh3VZZ4OpKydFYaA8ZBx%2BdE3AEVidYdid%2BXqsMbgWf8Hjc9UWYj7DWJFF%2BVZlsod2JMcy22gFU0jlPe7RCv%2BLUQcNyDvg%3D"}]}- server
- cloudflare
- strict-transport-security
- max-age=31536000; includeSubDomains
- x-clacks-overhead
- GNU Terry Pratchett
- x-content-type-options
- nosniff
- x-frame-options
- DENY
- x-powered-by
- Pie
- x-robots-tag
- max-snippet:-1, max-image-preview:large, max-video-preview:-1
AI & agents
Open to AI search, closed to training
The crawlers behind AI search may come in, and robots.txt turns away GPTBot, ClaudeBot, Google-Extended and 6 more. Blocking Google-Extended also keeps it out of Gemini's answers. For agents, it offers an API catalog and 4 agent skills.
Crawlers
Blocks 9 of 25TrainingSearchOn request
They visit a page when someone asks an assistant about it. ChatGPT's, Perplexity's, Meta's and Amazon's treat robots.txt as advisory;
Anthropic's and Mistral's follow it.
OpenAIGPTBotblockedOAI-SearchBotallowedChatGPT-Userallowed
AnthropicClaudeBotblockedClaude-SearchBotallowedClaude-Userallowed
GoogleGoogle-ExtendedblockedGooglebotallowed—
Microsoft—bingbotallowed—
AppleApplebot-ExtendedblockedApplebotallowed—
Perplexity—PerplexityBotallowedPerplexity-Userallowed
MetaMeta-ExternalAgentblockedMeta-WebIndexerallowedMeta-ExternalFetcherallowed
AmazonAmazonbotblockedAmzn-SearchBotallowedAmzn-Userallowed
MistralMistralAI-TrainingblockedMistralAI-IndexallowedMistralAI-Userallowed
OthersCCBotblockedBytespiderblockedDuckAssistBotallowed
- Can cite itThe AI products that can use the site in their answers: each answers from one crawler (OAI-SearchBot for ChatGPT search, Googlebot for AI Overviews, bingbot for Copilot), and robots directives on the front page, like noindex, nosnippet and noarchive, keep some out.
- ChatGPT searchClaudePerplexityAI OverviewsCopilotMeta AISiri
- Kept out of
- Gemini: robots.txt blocks Google-Extended
Content signals
Lines in robots.txt (Cloudflare's Content Signals Policy) saying whether pages may be used for search, as input to AI answers (ai-input) and for AI
training. No major AI company has said it follows them.
search=yesai-train=nouse=reference
Cloudflare writes part of this robots.txt, and can also block AI crawlers at its edge whatever the file says.
Reading
- Without JavaScriptText on the front page before any scripts run: what GPTBot, ClaudeBot, PerplexityBot and most agents read. Google, Bing and Apple's crawlers run scripts.
- 157 words
- MarkdownAgents like Claude Code, Cursor and OpenCode ask for Markdown in their Accept header. It's the page without its markup, so it costs them far fewer tokens.
- Not offered
- llms.txtA Markdown file listing a site's key pages for AI tools. Coding agents read it; search crawlers mostly don't.
- 56 links in 7 sectionsllms-full.txt too (226.8 KB)
- Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
- WebSite, Person, ProfilePage
Tools Ways an AI agent can do things on the site, not just read it: an MCP server that apps like Claude, ChatGPT and Cursor connect to, an API catalog, packaged agent skills, a shopping profile (UCP), or tools the page offers AI in the browser (WebMCP). heade.rs looks in the official MCP Registry and the files the site publishes under /.well-known/.
- APIsAn API catalog (RFC 9727, at /.well-known/api-catalog) lists a site's APIs and links to their machine-readable descriptions, usually OpenAPI.
- 1 in its API catalogjlopes.eu · OpenAPI
- Agent skillsInstructions and scripts packaged for AI agents (SKILL.md), listed in an index at /.well-known/agent-skills/index.json or in the site's AI Catalog. Tools like Vercel's skills CLI install them.
- 4 skillsDiscovery v0.2.0
- In-page toolsWebMCP: tools a page registers so AI agents in the browser, like ChatGPT's, can call them instead of clicking through the page. Only tools declared in the HTML or inline scripts can be seen here.
- Registers tools Old API