gradeclock.com

Get an email when its DNS, website or certificate changes.

gradeclock.com serves a website of its own over HTTPS. It answers on both IPv4 and IPv6, with a valid TLS certificate and MX records for mail.

3,456 other domains share an IP address with it.

The most recent crawl returned the page title “Free Grade Calculators, GPA Tools and Classroom Timers” and 18,086 bytes of HTML.

Domain properties

Property	Value	Explanation
Top-level domain	.com	Statistics for all domains we know under this TLD.
Has website	yes	A website is hosted under the domain, which does not redirect to an external domain.
Has MX-record	yes	The domain has an MX record.
External redirect	no	The domain redirects to another domain.
Redirect to https	yes	The domain redirects to https.
Redirect to www.	no	The domain redirects to www.domain.
Only with www.	no	The domain can only be reached with the subdomain "www".
Only DNS, no website	no	There are no A or AAAA records in DNS.
IP-Address	Both	Shows whether the domain only has IPv4 or IPv6 or both.
SSL-Certificate	valid	Shows whether the domain has a valid SSL certificate.
Redirects	0	Number of domains that redirect to this domain.
Reverse IP	3,456	Number of domains with the same IP(s).

This data through the API

The data on this page is also available as JSON: /lookup for the key facts, /reverseip, /redirect and /similar for the lists, and /dnshistory with Basic and Premium. A free account comes with an API key and 100 calls a day.

curl -X POST https://api.webxtrend.com/v1.0/lookup \
  -H 'Content-Type: application/json' \
  -d '{"token": "YOUR_TOKEN", "query": "gradeclock.com"}'

Create a free account Read the API docs

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Websites whose start page offers something similar, found by comparing the text of their start pages, across languages. Near-identical copies, parking pages and error pages are left out. The full list of up to 100 comes through the API: similar websites.

Last SSL certificate

Issuer	Google Trust Services
Valid from	9/20/2026
Valid to	12/19/2026
Time until expiry	60 days

Last successful crawl

Title	Free Grade Calculators, GPA Tools and Classroom Timers
Description	Free final grade and GPA calculators, plus classroom timers and a name picker for US students and teachers. Formulas shown, no account needed.
Content-Length	18,086 bytes

Title and description as published by the page itself in its own <title> and <meta name="description"> tags.

DNS history

IPv4 address	Last updated
104.21.6.249	9/23/2026
172.67.135.132	9/23/2026

IPv6 address	Last updated
2606:4700:3031:0:0:0:6815:6f9	9/23/2026
2606:4700:3033:0:0:0:ac43:8784	9/23/2026

Mail server	Priority	Last updated
eforward1.registrar-servers.com	10	9/23/2026
eforward2.registrar-servers.com	10	9/23/2026
eforward3.registrar-servers.com	10	9/23/2026
eforward4.registrar-servers.com	15	9/23/2026
eforward5.registrar-servers.com	20	9/23/2026

Name server	Last updated
gail.ns.cloudflare.com	9/23/2026
tosana.ns.cloudflare.com	9/23/2026

The five most recent states of each record type. The full history comes through the API: DNS history.

Most recent redirect domains

No domains found.

Reverse IP neighbours

104.21.6.249 870 domains · here since 9/28/2026

Domain	On this IP since
zumo-123.org	9/15/2026
zs88.vu	10/7/2026
zoqycunoqi.pro	9/12/2026
zivilcourage-wuerzburg.de	9/15/2026
zhongkaiyuan.com	9/29/2026
zh-leyusports-qq.sx.cn	10/15/2026
zawarudo.com	9/30/2026
zainblex.com	10/13/2026
yuanliangwoyicia.baby	10/14/2026
yovrandersem.ru	9/19/2026
yourseyva.in	9/13/2026
yourleaseagreement.com	9/13/2026
and 857 more

172.67.135.132 870 domains · here since 9/28/2026

Domain	On this IP since
zumo-123.org	9/15/2026
zs88.vu	10/7/2026
zoqycunoqi.pro	9/12/2026
zivilcourage-wuerzburg.de	9/15/2026
zhongkaiyuan.com	9/29/2026
zh-leyusports-qq.sx.cn	10/15/2026
zawarudo.com	9/30/2026
zainblex.com	10/13/2026
yuanliangwoyicia.baby	10/14/2026
yovrandersem.ru	9/19/2026
yourseyva.in	9/13/2026
yourleaseagreement.com	9/13/2026
and 857 more

2606:4700:3031::6815:6f9 858 domains · here since 9/28/2026

Domain	On this IP since
zumo-123.org	9/15/2026
zs88.vu	10/7/2026
zoqycunoqi.pro	9/12/2026
zivilcourage-wuerzburg.de	9/15/2026
zigei.top	9/20/2026
zhongkaiyuan.com	9/29/2026
zh-leyusports-qq.sx.cn	10/15/2026
zawarudo.com	9/30/2026
zainblex.com	10/13/2026
yuanliangwoyicia.baby	10/14/2026
yovrandersem.ru	9/19/2026
yourseyva.in	9/13/2026
and 845 more

2606:4700:3033::ac43:8784 858 domains · here since 9/28/2026

Domain	On this IP since
zumo-123.org	9/15/2026
zs88.vu	10/7/2026
zoqycunoqi.pro	9/12/2026
zivilcourage-wuerzburg.de	9/15/2026
zigei.top	9/20/2026
zhongkaiyuan.com	9/29/2026
zh-leyusports-qq.sx.cn	10/15/2026
zawarudo.com	9/30/2026
zainblex.com	10/13/2026
yuanliangwoyicia.baby	10/14/2026
yovrandersem.ru	9/19/2026
yourseyva.in	9/13/2026
and 845 more

Sharing an address does not always mean sharing a server: on a CDN or a large hosting platform, millions of unrelated domains answer on the same few addresses. We measured how far that goes in Half the web sits on 276 IP addresses. The complete list of neighbours, also for an IP address, comes through the API: reverse IP lookup.

Dive into our data, search now!