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Gridlode
Rank #3,838Updated November 10, 2026

castbox.fm

Best free podcast app for Apple iOS and Android | Let words move you

castbox.fm is registered with Instra Corporation Pty Ltd. since January 15, 2016 (10.8 years). The registration expires on January 15, 2027. The site runs on WordPress, Cloudflare Web Analytics, Cloudflare and 2 other technologies. Its email security grade is B. Its SSL certificate is issued by Google Trust Services and is valid for 70 more days.

Domain age
10.8 yrs
Technologies
5
Email security
B
SSL days left
70

Registration

RegistrarInstra Corporation Pty Ltd.
IANA ID1376
RegisteredJanuary 15, 2016
ExpiresJanuary 15, 2027
UpdatedNovember 20, 2025
Statusactive
Name serverscharles.ns.cloudflare.com, sara.ns.cloudflare.com
DNSSECNot signed
RegistrantJP

DNS records

TypeValueTTL
A172.66.159.47153
A104.20.29.143153
MXaspmx.l.google.com 1300
MXalt3.aspmx.l.google.com 10300
MXalt4.aspmx.l.google.com 10300
MXalt1.aspmx.l.google.com 5300
MXalt2.aspmx.l.google.com 5300
NScharles.ns.cloudflare.com86400
NSsara.ns.cloudflare.com86400
TXTanthropic-domain-verification-dn0srx=KLYpjzbz5CrSJmIdQkyIsv8t6300
TXTgoogle-site-verification=3mFzIfOXnoEMgL-JMulOFtrhLfDKswAipdTnIzUr1UE300
TXTgoogle-site-verification=5Vz4UGhank_MS0JCLzeIGqXwqYodxDcXfzHG2URnlRc300
TXTgoogle-site-verification=AUfrk7KKqihYAX7cD5TkHHSP2aJp2Y3nOU0TMVxqYKQ300
TXTgoogle-site-verification=LQsnY64pPx4WMLgHyRgpi-qOH38IAfq6gsY2xUuJQ4s300
TXTgoogle-site-verification=qRzbWr-3P6DqfeqQVl5vDuzJgeHV6zHaCnKhxEAUe7E300
TXTv=spf1 include:spf.zoho.com include:transmail.net include:servers.mcsv.net include:mail.zendesk.com include:amazonses.com include:_spf.google.com ~all300
AAAA2606:4700:10::ac42:9f2f160
AAAA2606:4700:10::6814:1d8f160

Technology stack

Analytics
Cloudflare Web Analytics
CDN
Cloudflareimgix
CMS
WordPress
Programming language
PHP

SSL certificate

ValidValid
IssuerUS, WE1, Google Trust Services
ExpiresJanuary 19, 2027
Days remaining70
ProtocolTLSv1.3
Namescastbox.fm, test-reports.castbox.fm, *.test-reports.castbox.fm

Email security

BScore 80/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnDKIM key found (selector: k1, mandrill) but it is only 1024 bits; 2048 is recommended.
  • warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
  • warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
  • warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
  • goodSPF record found.
  • goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
  • goodDMARC policy is reject: mail that fails authentication is blocked.
  • goodDMARC aggregate reports are sent to mailto:[email protected].
  • good5 MX record(s) found. Mail is handled by Google Workspace.

Homepage metadata

TitleBest free podcast app for Apple iOS and Android | Let words move you
DescriptionMillions of podcasts for all topics. Listen to the best free podcast on Android, Apple iOS, Amazon Alexa, Google Home, Carplay, Android Auto, PC. Create...
Languageen
Canonicalhttps://castbox.fm/
Structured dataWebSite, Organization
IndexableYes
Word count182

About castbox.fm

Who is the registrar of castbox.fm?

castbox.fm is registered with Instra Corporation Pty Ltd. (IANA ID 1376).

When does castbox.fm expire?

The current registration of castbox.fm expires on January 15, 2027. It was first registered on January 15, 2016.

What technology does castbox.fm use?

We detected 5 technologies on castbox.fm, including Cloudflare Web Analytics, Cloudflare, imgix, WordPress, PHP.

Does castbox.fm protect its email with SPF and DMARC?

castbox.fm scores 80/100 (grade B) for email security. DKIM key found (selector: k1, mandrill) but it is only 1024 bits; 2048 is recommended. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection.

What are the name servers of castbox.fm?

castbox.fm uses charles.ns.cloudflare.com, sara.ns.cloudflare.com.