Location
Singapore, Singapore
Within about 20 km
Domain
duaer.com
Hosted by The Constant Company in Singapore, Singapore.
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.
AS20473The Constant Company
The Constant Company, LLC
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 valid45.77.32.0/20
Seen by 3,118 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
- AS20473The Constant Company
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
Can be spoofed
There's no SPF or DMARC record, so anyone can send mail that claims to be from duaer.com.
- Receives mail
- Amazon SES
- Mail servers
- inbound-smtp.ap-northeast-1.amazonaws.com
- SPFLists the servers allowed to send mail for the domain. Receivers check it against the sending server.
- Missing
- DMARCTells receivers what to do with mail that fails SPF and DKIM: nothing (none), spam folder (quarantine) or reject.
- Missing
- 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
Aduaer.com45.77.37.1112 min
NSduaer.comalec.ns.cloudflare.com1 day
NSduaer.comangelina.ns.cloudflare.com1 day
MXduaer.com10 inbound-smtp.ap-northeast-1.amazonaws.com5 min
TXTduaer.com"google-site-verification=dfsL7Mo-Pxgvot1UK3gQFCahWHBoVO5yjw4OVwAJR_o"1 hr
Details
Network
- IPv4
- 45.77.37.111
- Reverse DNSThe hostname this address points back to (its PTR record).
- 45.77.37.111.vultrusercontent.com
- ASNThe autonomous system number of the network that announces this address.
- AS20473
- Operator
- The Constant Company, LLC
- PrefixThe block of addresses announced over BGP that contains this address.
- 45.77.32.0/20
- RPKIWhether a signed record (ROA) authorizes this network to announce this prefix.
- Valid
- VisibilityHow many bgp.tools peers carry this announcement.
- 3,118 peers
- Type
- Content
- Registry
- ARIN
Location
- Country
- Singapore
- City
- Singapore
- Coordinates
- 1.3140° N, 103.6839° E
- Accuracy
- Within about 20 km
- Time zone
- Asia/SingaporeUTC+8
- Local time
- 17:00
- Continent
- Asia
Registration
RDAP- Registrar
- Guizhou Zhongyu Zhike Network Technology Co., Ltd.
- Registered
- Sep 8, 202643 days ago
- Expires
- Sep 8, 2027in 10 months
- Updated
- Sep 19, 2026
- StatusRegistry flags on the domain, such as locks that stop unauthorized transfers or changes.
- Active
- DNSSECDNSSEC signs DNS answers so they can't be forged on the way to you.
- Unsigned
- Name servers
- alec.ns.cloudflare.comangelina.ns.cloudflare.com
- Registrant
- Redacted for privacy
Sep 8, 2026322 days leftSep 8, 2027
Exposure
Open ports
2 open- 80HTTP
- 443HTTPS
- Tags
- Cloud
- Seen asHostnames Shodan has seen pointing at, or presented by, this address.
- 45.77.37.111.vultrusercontent.com
From Shodan InternetDB, updated weekly.
Website
Page
Duaer — AI that understands your company and gets the work done
For AI to get work done, it first has to know your company’s knowledge and processes. With Duaer, people get answers in one question, and work that is due reaches the right person in time.
- Language
- English
Built with
Nothing recognizable in its headers, DNS or markup.
Versions, rendering and outside codeTech 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.
Build
- Vite
hashed module in /assets/
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.
- Drawn in the browseralmost no text (0 words) until scripts run
- Cache-Control
- no-cache, no-store, must-revalidate
- HTML
- 7.2 KB · sent gzip-compressed
- Scripts
- 3 files · 1 inlineall from this site · 1 modules
- Render-blockingPlain scripts in the page's head, without async, defer or type=module. The browser shows nothing until each one has downloaded and run.
- 2 scripts
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
- Let's Encrypt
- Issuing CA
- YE1
- Covers
- duaer.com
- Also validOther unexpired certificates for this name, found in Certificate Transparency logs.
- 23 more certificates
Oct 10, 202679 days leftJan 8, 2027
From Certificate Transparency logs, via Cert Spotter.
Security
D- HSTSStrict-Transport-Security makes browsers refuse plain HTTP to this site. Preloaded sites are HTTPS-only even on a first visit.
- Not sent
- HTTP → HTTPSWhether the plain http:// address redirects visitors to the secure one.
- Redirects
- HTTP/3The newest HTTP, over QUIC. Announced in the alt-svc header or the domain's HTTPS DNS record.
- Available
- 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 4 of 7
- HSTSmissing
- CSPmissing
- Framingpresent
- No sniffingpresent
- Referrerpresent
- Permissionsmissing
- Isolationpresent
Response
200 OK942 ms from CMHDNS lookup28 ms
301 duaer.com980 ms
200 www.duaer.com942 ms
DNSConnect (TCP + TLS)Waiting for the replyFrom Cloudflare's CMH data center
Response headers
- alt-svc
- h3=":443"; ma=2592000
- cache-control
- no-cache, no-store, must-revalidate
- content-encoding
- gzip
- content-security-policy-report-only
- script-src 'nonce-qbmofAEwiAHmnzmjTSBSug' 'strict-dynamic' 'unsafe-eval'; object-src 'none'; base-uri 'none'
- content-type
- text/html; charset=utf-8
- cross-origin-opener-policy
- same-origin-allow-popups
- cross-origin-resource-policy
- same-origin
- date
- Wed, 21 Oct 2026 09:00:20 GMT
- etag
- W/"1b70-xo3gXJI0nZdz3OvybVVbSPyeQYc"
- origin-agent-cluster
- ?1
- referrer-policy
- strict-origin-when-cross-origin
- vary
- Accept-Encoding
- via
- 1.1 Caddy
- x-content-type-options
- nosniff
- x-frame-options
- SAMEORIGIN
- x-permitted-cross-domain-policies
- none
- x-xss-protection
- 0
- connection
- close
- transfer-encoding
- chunked
AI & agents
Empty without JavaScript
The front page shows almost no text until scripts run (0 words), and GPTBot, ClaudeBot and PerplexityBot don't run them.
Crawlers
Allows allTrainingSearchOn 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.
OpenAIGPTBotallowedOAI-SearchBotallowedChatGPT-Userallowed
AnthropicClaudeBotallowedClaude-SearchBotallowedClaude-Userallowed
GoogleGoogle-ExtendedallowedGooglebotallowed—
Microsoft—bingbotallowed—
AppleApplebot-ExtendedallowedApplebotallowed—
Perplexity—PerplexityBotallowedPerplexity-Userallowed
MetaMeta-ExternalAgentallowedMeta-WebIndexerallowedMeta-ExternalFetcherallowed
AmazonAmazonbotallowedAmzn-SearchBotallowedAmzn-Userallowed
MistralMistralAI-TrainingallowedMistralAI-IndexallowedMistralAI-Userallowed
OthersCCBotallowedBytespiderallowedDuckAssistBotallowed
- 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 OverviewsGeminiCopilotMeta AISiri
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.
- Almost no text0 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.
- 204 links in 4 sections
- Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
- Organization, WebSite, SoftwareApplication
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/.
No MCP server, API catalog, agent skills, shopping profile or in-page tools found.