Location
Walnut, United States
Within about 20 km
Domain
listener.com
Hosted by Amazon in Walnut, United States.
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.
AS16509Amazon
Amazon.com, 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 valid76.76.21.0/24
Seen by 3,209 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
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
DNS records
TypeNameValueTTL
Alistener.com76.76.21.2110 min
NSlistener.comns34.domaincontrol.com1 hr
NSlistener.comns33.domaincontrol.com1 hr
MXlistener.com1 aspmx.l.google.com1 hr
MXlistener.com10 alt4.aspmx.l.google.com1 hr
MXlistener.com5 alt2.aspmx.l.google.com1 hr
MXlistener.com10 alt3.aspmx.l.google.com1 hr
MXlistener.com5 alt1.aspmx.l.google.com1 hr
TXTlistener.com"v=spf1 include:_spf.google.com ~all"1 hr
TXT_dmarc.listener.com"v=DMARC1; p=reject; adkim=r; aspf=r; rua=mailto:dmarc_rua@onsecureserver.net;"1 hr
TXT_dmarc.listener.com"v=DMARC1; p=none; rua=mailto:postmaster@listener.com;"1 hr
Protected from spoofing
Mail that fails its checks is rejected under listener.com's DMARC policy, so forged mail doesn't reach inboxes.
- Receives mail
- Google Workspace
- Mail servers
- aspmx.l.google.comalt2.aspmx.l.google.comalt1.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 else1 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.
- Rejectsends 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
Details
Network
- IPv4
- 76.76.21.21
- ASNThe autonomous system number of the network that announces this address.
- AS16509
- Operator
- Amazon.com, Inc.
- PrefixThe block of addresses announced over BGP that contains this address.
- 76.76.21.0/24
- RPKIWhether a signed record (ROA) authorizes this network to announce this prefix.
- Valid
- VisibilityHow many bgp.tools peers carry this announcement.
- 3,209 peers
- Type
- Content
- Registry
- ARIN
Location
- Country
- United States
- Region
- California
- City
- Walnut
- Coordinates
- 34.0233° N, 117.8512° W
- Accuracy
- Within about 20 km
- Time zone
- America/Los_AngelesUTC-7
- Local time
- 10:59
- Continent
- North America
Registration
RDAP- Registrar
- GoDaddy.com, LLC
- Registered
- Jun 6, 199630 years ago
- Expires
- Jun 5, 2027in 7 months
- Updated
- May 16, 2025
- StatusRegistry flags on the domain, such as locks that stop unauthorized transfers or changes.
- Delete lockedclient renew prohibitedTransfer lockedUpdate locked
- DNSSECDNSSEC signs DNS answers so they can't be forged on the way to you.
- Unsigned
- Name servers
- ns33.domaincontrol.comns34.domaincontrol.com
- Registrant
- Redacted for privacy
Jun 6, 1996235 days leftJun 5, 2027
Exposure
Open ports
2 open- 80HTTP
- 443HTTPS
- Seen asHostnames Shodan has seen pointing at, or presented by, this address.
- lokion.comsoleilsystems.co.jp
From Shodan InternetDB, updated weekly.
HTTPS
Certificate
Valid- Issuer
- Let's Encrypt
- Issuing CA
- YR1
- Covers
- listener.com
- Also validOther unexpired certificates for this name, found in Certificate Transparency logs.
- 1 more certificate
Sep 25, 202672 days leftDec 24, 2026
From Certificate Transparency logs, via Cert Spotter.
Security
F- HSTSStrict-Transport-Security makes browsers refuse plain HTTP to this site. Preloaded sites are HTTPS-only even on a first visit.
- 1 year
- 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.
- Not announced
- 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 1 of 7
- HSTSpresent
- CSPmissing
- Framingmissing
- No sniffingmissing
- Referrermissing
- Permissionsmissing
- Isolationmissing
Response
200 OK719 ms from CMHDNS lookup73 ms
200 listener.com719 ms
DNSConnect (TCP + TLS)Waiting for the replyFrom Cloudflare's CMH data center
Website
Page
Omni-channel Campaign Reporting for the Modern Podcast Industry | Listener
Measure sponsorship performance across audio, YouTube, and social in one place. Built for the podcast networks and media companies running modern campaigns.
- Language
- English
- Generator
- Webflow
Built with
- Hosting
- Vercelx-vercel-id header
- CDN
- Cloudflarecf-ray header
Response headers
- age
- 44396
- cache-control
- public, max-age=0, must-revalidate
- cf-cache-status
- HIT
- cf-ray
- a4a03d917a51a53e-CMH
- content-encoding
- gzip
- content-type
- text/html; charset=utf-8
- date
- Tue, 13 Oct 2026 17:59:51 GMT
- last-modified
- Tue, 13 Oct 2026 12:03:16 GMT
- link
<https://cdn.prod.website-files.com>; rel=preconnect; crossorigin, <https://cdn.prod.website-files.com/691688333ba7c006297bb49f/css/listener-newlanding.webflow.shared.4a32744b8.min.css>; rel=preload; as=style; crossorigin; integrity="sha384… Show all
<https://cdn.prod.website-files.com>; rel=preconnect; crossorigin, <https://cdn.prod.website-files.com/691688333ba7c006297bb49f/css/listener-newlanding.webflow.shared.4a32744b8.min.css>; rel=preload; as=style; crossorigin; integrity="sha384-SjJ0S4UHDV9Ic8/zX6GP4LD2rNZp+ULU2dZWEm7fQOFYwsArLsSihCUvBxb4WIUA", <https://cdn.intellimize.co>; rel=preconnect, <https://api.intellimize.co>; rel=preconnect; crossorigin, <https://log.intellimize.co>; rel=preconnect; crossorigin, <https://117109317.intellimizeio.com>; rel=preconnect, <https://cdn.prod.website-files.com/css/listener-newlanding.webflow.shared.1f70978b9.min.css>; rel=preload; as=style- server
- Vercel
- set-cookie
- _cfuvid=MQEm8qfmLJBLMgwKHbaO_jn3A79j0h_tNFLcbIdTV8c-1791914391.281234-1.0.1.1-RY3RGzZDyrhNwCFn1QBGTI4Za0Qd7SxB.WnKZGF7zkg; HttpOnly; SameSite=None; Secure; Path=/; Domain=lander.listener.com
- strict-transport-security
- max-age=31536000
- surrogate-control
- max-age=432000
- surrogate-key
- lander.listener.com 691688333ba7c006297bb49f pageId:691d6b9aaf719318f89276c1 691688353ba7c006297bb594 693839a56064508e6ef37598
- vary
- accept-encoding
- x-lambda-id
- 20ec7c10-6aa9-4e46-8ffb-75635bda1226
- x-vercel-cache
- MISS
- x-vercel-id
- cle1::csm8q-1791914391231-645dae53afba
- x-wf-region
- us-east-1
- connection
- close
- transfer-encoding
- chunked
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.
Hosting
- Vercel
x-vercel-id header
CDN & edge
- Cloudflare
cf-ray header
Fonts
- Inter
self-hosted font
Libraries
- Swiper
loaded from cdn.jsdelivr.net
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.
- Rendered on each requestCache-Control: public, max-age=0, must-revalidate
- 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 · made 12 hr ago
- Cache-Control
- public, max-age=0, must-revalidate
- HTML
- 396.7 KB · sent gzip-compressed
- Scripts
- 14 files · 10 inline14 from other sites
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.
- Public CDNsOpen-source packages loaded straight from a public CDN. A floating version (@3, @latest or none) can change under the site without a deploy. Without an integrity attribute, the browser can't tell if the CDN's copy was tampered with.
- @splidejs/splide@4.1.4No integrity check@splidejs/splide-extension-auto-scroll@0.5.3No integrity checklenis@1.3.16No integrity check@rive-app/webgl2@2.32.0No integrity checkswiper@12Floating version@splidejs/splide@4.1.4No integrity checkand 1 more
- Integrity checksSubresource Integrity: the script tag carries a hash of the file, so the browser refuses it if the other site changes it. Analytics and tag manager scripts change by design and can't carry one; pinned library files can.
- 2 of 14 scripts
Pin those packages to exact versions so what loads today still loads tomorrow.
AI & agents
Open to AI crawlers
robots.txt lets every AI crawler in.
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.
- 2,163 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.
- Not published
- Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
- 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.