khanacademy.org

Khan Academy | Free Online Courses, Lessons & Practice: Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere..
- Daily
Visitor
1.1M - Daily
Revenue
$5K - Monthly
Visitor
33.9M - Monthly
Revenue
$153K
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khanacademy Server Status History
Date | Server Status | Speed |
---|---|---|
2023-05-21 09:06:32 | Up | 4.701 Second |
2023-05-21 06:56:32 | Up | 10.31 Second |
2023-05-21 04:46:26 | Up | 2.384 Second |
2023-05-21 02:36:23 | Down | 0.097 Second |
2023-05-21 00:26:30 | Up | 2.605 Second |
2023-05-20 22:16:32 | Up | 2.842 Second |
2023-05-20 20:06:24 | Up | 6.736 Second |
2023-05-19 23:52:24 | Up | 5.682 Second |
2023-05-19 21:42:32 | Up | 7.246 Second |
2023-05-19 19:32:25 | Up | 4.022 Second |
2023-05-19 17:22:29 | Up | 7.296 Second |
2023-05-19 15:12:30 | Up | 7.932 Second |
2023-05-19 13:02:23 | Up | 3.611 Second |
2023-05-19 10:52:24 | Up | 0.423 Second |
2023-05-19 08:42:24 | Up | 3.475 Second |
2023-05-19 06:30:33 | Up | 3.965 Second |
2023-05-19 04:20:32 | Up | 0.354 Second |
2023-05-19 02:10:24 | Up | 0.299 Second |
2023-05-19 00:00:30 | Up | 0.367 Second |
2023-05-18 21:50:25 | Up | 0.403 Second |
Search Metrics
khan academyarea of a circle
area of a triangle
quadratic formula
less than sign
☁ Page Metrics
- and 3%
- our 2%
- teachers 2%
- khan 2%
- academy 2%
- the 2%
- learners 1%
- here 1%
- math 1%
- start 1%
- courses 1%
- every 1%
- their 1%
- free 1%
- education 1%
- your 1%
- can 1%
- for 1%
- you 1%
- skills 1%
- %
Website raw article content tells search engines what your web page content is about. The word usage rate is very important and the frequency of words used above 4% is perceived as spam.
☯ Technology Analysis
- - Cookie - Express.js - Node.js - HSTS - Google Cloud - varnish - Fastly - Amazon CloudFront - Amazon Web Services (AWS)
✇ DNS Records
Record | Class | TTL | Value |
---|---|---|---|
A | IN | 59 | ip: 52.84.112.78 |
A | IN | 59 | ip: 52.84.112.28 |
A | IN | 59 | ip: 52.84.112.8 |
A | IN | 59 | ip: 52.84.112.83 |
NS | IN | 21599 | target: ns-125.awsdns-15.com |
NS | IN | 21599 | target: ns-1489.awsdns-58.org |
NS | IN | 21599 | target: ns-1664.awsdns-16.co.uk |
NS | IN | 21599 | target: ns-798.awsdns-35.net |
TXT | IN | 299 | txt: MS=ms10049948 entries: MS=ms10049948 |
TXT | IN | 299 | txt: _globalsign-domain-verification=Ca9ol7KyPTrPtyGjL1BqGx_wv6SymozDmCXhHJveUr entries: _globalsign-domain-verification=Ca9ol7KyPTrPtyGjL1BqGx_wv6SymozDmCXhHJveUr |
TXT | IN | 299 | txt: _globalsign-domain-verification=Prrz12gznJzJiHaajX3CnPfpqK6hhLae0miMSZ_BGa entries: _globalsign-domain-verification=Prrz12gznJzJiHaajX3CnPfpqK6hhLae0miMSZ_BGa |
TXT | IN | 299 | txt: _globalsign-domain-verification=e70UZqvudGByIeilV8oO0gubBZi0P7QLakTxKub-zS entries: _globalsign-domain-verification=e70UZqvudGByIeilV8oO0gubBZi0P7QLakTxKub-zS |
TXT | IN | 299 | txt: apple-domain-verification=FBF7Yx9o3htFHZ7m entries: apple-domain-verification=FBF7Yx9o3htFHZ7m |
TXT | IN | 299 | txt: botify-site-verification=sGRcFNKzIkHzx1jtsQ7YkiT8hgWB6RiU entries: botify-site-verification=sGRcFNKzIkHzx1jtsQ7YkiT8hgWB6RiU |
TXT | IN | 299 | txt: facebook-domain-verification=8kvuco8ljlv8t1aedswjypctrp1pk3 entries: facebook-domain-verification=8kvuco8ljlv8t1aedswjypctrp1pk3 |
TXT | IN | 299 | txt: globalsign-domain-verification=qV_5Us2mt6FO1Ig5hnG4kYHESYAxuH5-qZ0cRXC-Ig entries: globalsign-domain-verification=qV_5Us2mt6FO1Ig5hnG4kYHESYAxuH5-qZ0cRXC-Ig |
TXT | IN | 299 | txt: google-site-verification=JML6gcy7DbE1dA3JB9W4O6EB9uQ8bpOlJTyniVCgd-o entries: google-site-verification=JML6gcy7DbE1dA3JB9W4O6EB9uQ8bpOlJTyniVCgd-o |
TXT | IN | 299 | txt: google-site-verification=Jiabx8hC-zV0E8-hAj40dHCY_oWNIvfqkNe7VFnGbCs entries: google-site-verification=Jiabx8hC-zV0E8-hAj40dHCY_oWNIvfqkNe7VFnGbCs |
TXT | IN | 299 | txt: google-site-verification=SprWzGYoIdXdFrUCSyBhXJtHzFjE8FAQNlTamgKenhU entries: google-site-verification=SprWzGYoIdXdFrUCSyBhXJtHzFjE8FAQNlTamgKenhU |
TXT | IN | 299 | txt: google-site-verification=sHrvDlgokhtbjBWsn8Dhu616EFRRv8GD0C1AU4_1gl4 entries: google-site-verification=sHrvDlgokhtbjBWsn8Dhu616EFRRv8GD0C1AU4_1gl4 |
TXT | IN | 299 | txt: google-site-verification=y1w1HGdtmQcg92Uy4JtubYkFtDDshCwmDXTFCgjpr-Y entries: google-site-verification=y1w1HGdtmQcg92Uy4JtubYkFtDDshCwmDXTFCgjpr-Y |
TXT | IN | 299 | txt: spf2.0/pra include:_spf.google.com include:sendgrid.net include:aspmx.sailthru.com include:mailgun.org include:_netblocks.khanacademy.org -all entries: spf2.0/pra include:_spf.google.com include:sendgrid.net include:aspmx.sailthru.com include:mailgun.org include:_netblocks.khanacademy.org -all |
TXT | IN | 299 | txt: v=spf1 include:_spf.google.com include:sendgrid.net include:aspmx.sailthru.com include:mailgun.org include:_netblocks.khanacademy.org -all entries: v=spf1 include:_spf.google.com include:sendgrid.net include:aspmx.sailthru.com include:mailgun.org include:_netblocks.khanacademy.org -all |
MX | IN | 299 | pri: 1 target: aspmx.l.google.com |
MX | IN | 299 | pri: 10 target: aspmx2.googlemail.com |
MX | IN | 299 | pri: 10 target: aspmx3.googlemail.com |
MX | IN | 299 | pri: 5 target: alt1.aspmx.l.google.com |
MX | IN | 299 | pri: 5 target: alt2.aspmx.l.google.com |
SOA | IN | 299 | mname: ns-1664.awsdns-16.co.uk rname: awsdns-hostmaster.amazon.com serial: 1 refresh: 7200 retry: 900 expire: 1209600 minimum-ttl: 86400 |
ℹ Domain WHOIS
- Domain name: Khanacademy.org
- Registry domain id: D118495620-lror
- Registrar whois server: Whois.godaddy.com
- Registrar url: Http://www.whois.godaddy.com
- Updated date: 2019-03-15t14:46:57z
- Creation date: 2006-03-14t22:24:02z
- Registry expiry date: 2024-03-14t22:24:02z
- Registrar: Godaddy.com, llc
- Registrar iana id: 146
- Registrar abuse contact email: Abuse@godaddy.com
- Registrar abuse contact phone: +1.4806242505
- Domain status: The owner can't delete this domain
- Domain status: The owner can't renew this domain
- Domain status: The owner can't transfer to another company this domain
- Domain status: The owner can't update this domain
- Registrant organization: Khan academy
- Registrant state/province: California
- Registrant country: Us
- Name server: Ns-1489.awsdns-58.org
- Name server: Ns-125.awsdns-15.com
- Name server: Ns-1664.awsdns-16.co.uk
- Name server: Ns-798.awsdns-35.net
- Dnssec: Unsigned
- Last update of whois database: 2021-01-31t19:23:30z
✉ Server IP Details
- Amazon technologies inc. at-88-z (net-52-84-0-0-1) 52.84.0.0 - 52.95.255.255
- Amazon.com, inc. amazo-cf (net-52-84-0-0-2) 52.84.0.0 - 52.85.255.255
☰ HTTP Headers
content-type | text/html; charset=utf-8 |
---|---|
x-powered-by | express |
x-content-type-options | nosniff |
x-frame-options | sameorigin |
cache-control | no-store, must-revalidate |
etag | w/"3f785-oi4hqk5gjjl4/llrgwsv0ifxzgy" |
content-encoding | gzip |
server | google frontend |
via | 1.1 varnish, 1.1 varnish |
accept-ranges | bytes |
date | sun, 31 jan 2021 19 |
age | 19849 |
x-served-by | cache-mdw17334-mdw, cache-fra19170-fra |
x-cache | miss, hit |
x-cache-hits | 0, 1 |
x-timer | s1612121069.294320,vs0,ve3 |
vary | accept-encoding, x-ka-is-e2e, x-ka-is-phone, x-ka-is-tablet, x-ka-is-unsupported-browser, x-ka-is-ios, x-fastly-country, x-ka-lang, x-ka-locale, x-ka-locale-status, x-ka-curriculum, x-ka-has-any-permissions, x-ka-may-be-under13, x-ka-is-phantom, x-ka-static-version, x-ka-published-content-version |
set-cookie | kavid=075de656-0dd1-4b7a-b709-f5fc2a380cd5; expires=tue, 31 jan 2023 19 |
set-cookie | gae_b_id=!$nsa9-fdquasu2fkewmliqyxq90viantqorr2mhqdeue.~qntckt~1$a2fpzf85nzu5oty3odq2mjmymdg4mtm4odq4mjiz; path=/; expires=mon, 31 jan 2022 19 |
x-ka-cached-trace-id | 2679625831370ecbd5f9646a4df9a97b/2943463840773324669 |
x-cloud-trace-context | b840f7a6-3c22-47f1-a79a-df051eed6d7f |
strict-transport-security | max-age=31536000; includesubdomains; preload |
content-length | 55726 |
✔ Robots.txt
User-agent: *
Sitemap: https://www.khanacademy.org/sitemap.xml
Disallow: /_ah/
Disallow: /admin/
Disallow: /api/auth/
Disallow: /api/internal/_bb/
Disallow: /api/internal/_mt/
Disallow: /bigbingo_redirect
Disallow: /crash
Disallow: /devadmin/
Disallow: /embed_video
Disallow: /postlogin
Disallow: /preview/
Disallow: /search
Disallow: /searchtest
Disallow: /settings/linkaccount
⚔ SSL Details
Subject | C = BE, O = GlobalSign nv-sa, CN = GlobalSign CloudSSL CA - SHA256 - G3 |
---|---|
Issuer | C = BE, O = GlobalSign nv-sa, OU = Root CA, CN = GlobalSign Root CA |
Version | 2 |
Serial Number | 46f08cdbcf2c5466ef3301dd5f34 |
Signature Algorithm | sha256WithRSAEncryption |
Public Key Algorithm | rsaEncryption |
X509v3 Key Usage | CertificateSign,CRLSign |
X509v3 Extended Key Usage | TLSWebServerAuthentication,TLSWebClientAuthentication |
X509v3 Basic Constraints | CA:TRUE,pathlen:0 |
X509v3 Subject Key Identifier | A9:2B:87:E1:CE:24:47:3B:1B:BF:CF:85:37:02:55:9D:0D:94:58:E6 |
X509v3 Authority Key Identifier | keyid:60:7B:66:1A:45:0D:97:CA:89:50:2F:7D:04:CD:34:A8:FF:FC:FD:4B |
Authority Information Access | OCSP-URI:http://ocsp.globalsign.com/rootr1 |
X509v3 CRL Distribution Points | , FullName:, URI:http://crl.globalsign.com/root.crl |
X509v3 Certificate Policies | Policy:1.3.6.1.4.1.4146.1.20, Policy:2.23.140.1.2.2, CPS:https://www.globalsign.com/repository/ |
Start date | Aug 19 00:00:00 2015 GMT |
Expire date | Aug 19 00:00:00 2025 GMT |
RSA Public Key | 2048 |