Cancer.gov Comprehensive Cancer Information - NCI

Accurate, up-to-date, comprehensive cancer information from the U.S. government's principal agency for cancer research.

Cancer.gov Quick Summary

Status

Online

Server IP address resolved: Yes

Http response code: 200

Response time: 0.95 sec.

Last Checked: 04/27/2025

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Cancer.gov traffic estimate is about 46,869 unique visitors and 84,364 pageviews per day. The approximated value of cancer.gov is 1,103,760 USD. Every unique visitor makes about 1.8 pageviews on average.

Alexa Traffic Rank estimates that cancer.gov is ranked number 691 in the world, while most of its traffic comes from United States, where it occupies as high as 4,925 place.

It’s good for cancer.gov that their hosting company NCIFCRF - National Cancer Institute/Frederick Cancer Research, US is located in United States, as that provides the majority of their visitors to benefit from the faster page load time. See the list of other websites hosted by NCIFCRF - National Cancer Institute/Frederick Cancer Research, US.

Cancer.gov is registered under .GOV top-level domain. Check other websites in .GOV zone.

During the last check (October 13, 2024) cancer.gov has a valid and up-to-date wildcard SSL certificate issued by DigiCert Inc that expires on April 29, 2025, please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by DigiCert Inc.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust cancer.gov is pretty a safe domain.

Relying on Google Mobile-Friendly test cancer.gov is well optimized for mobile and tablet devices, however website page loading time may be improved.

Cancer.gov General Information

Cancer.gov Audience Geography

Where are website visitors coming from?

Visitors
Pageviews
Ranks

Country	Visitors
United States US	24.5%
China CN	20.2%
India IN	8%
Mexico MX	4.7%
United Kingdom GB	4%
Spain ES	3.2%
Argentina AR	2.9%
Venezuela VE	2.4%
Australia AU	2.3%
Other	27.8%

Country	Rank
Ecuador EC	2136
Venezuela VE	3005
Argentina AR	3500
Mexico MX	3720
Spain ES	3864
Peru PE	4144
Colombia CO	4400
China CN	4716
United States US	4925
Australia AU	4936
Philippines PH	5333
United Kingdom GB	5870

Cancer.gov Traffic Distribution

Where do visitors go on cancer.gov?

Subdomain Traffic
Views per User
Subdomain Reach

Subdomain	Pageviews
cancer.gov	50.89%
seer.cancer.gov	26.19%
gdc.cancer.gov	8.61%
ccr.cancer.gov	2.5%
surveillance.cancer.gov	1.85%
visualsonline.cancer.gov	0.71%
cancercontrol.cancer.gov	0.62%
bcrisktool.cancer.gov	0.48%
nci-media.cancer.gov	0.38%
other	7.78%

Subdomain	Views per User
seer.cancer.gov	3.9
gdc.cancer.gov	2.9
ccr.cancer.gov	2.7
dceg.cancer.gov	2
ncifrederick.cancer.gov	2
bcrisktool.cancer.gov	2
visualsonline.cancer.gov	2
surveillance.cancer.gov	2
cancercontrol.cancer.gov	1.4
cancer.gov	1.4
other	0.5

Subdomain	Reach
cancer.gov	73.17%
seer.cancer.gov	13.54%
gdc.cancer.gov	6.05%
surveillance.cancer.gov	1.92%
ccr.cancer.gov	1.9%
cancercontrol.cancer.gov	0.93%
visualsonline.cancer.gov	0.92%
nci-media.cancer.gov	0.75%
bcrisktool.cancer.gov	0.54%
ncifrederick.cancer.gov	0.2%
other	0.18%

Cancer.gov Popularity

How popular is cancer.gov?

Global Rank
Pageviews
Reach

Period	Global Rank	Global Rank Delta
past 3 months	8156	-2635
past month	7568	-1242
past week	8302	1731
yesterday	6076	-1776

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	14940	-2021	445	-1.53%	1.8	-15.46%
30	12656	-4366	53	22%	2	30%
7	14799	3535	47	-25.56%	1.9	-5.97%
1	13725	-2836	54	20%	1.6	-8.284%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	6801	-2834	993	20%
30	6655	-511	92	-2.51%
7	7204	1473	80	-20.91%
1	4739	-1725	120	30%

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Cancer.gov Safety Information

Rankchart Summary

Safe

Updated: 04/27/2025

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Safe

Updated: 03/21/2025

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Norton ConnectSafe evaluates websites for any unsafe and inapropriate content. The results are important for families with young children.

Google Safe Search

Safe

Updated: 10/11/2016

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SafeSearch works as a parental control tool to filter out any content that might be inappropriate for your children.

Google Safe Browsing

Safe

Malware not found

Phishing not detected

Unwanted software not found

Harmfull applications not found

Updated: 01/09/2019

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Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

McAfee® WebAdvisor

Safe

Updated: 02/22/2021

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McAfee assesses cancer.gov for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze cancer.gov for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Child safety is very good

Updated: 01/09/2019

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The WOT calculates reputation of the cancer.gov. This reputation system receives ratings from users and information from third-party sources, assesses the cancer.gov for safety features and confirms, whether cancer.gov is suitable for children.

Cancer.gov SSL Information

Information about SSL/TLS certificates

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Domain	*.cancer.gov
Issuer Organization	DigiCert Inc
Issuer	DigiCert Global G2 TLS RSA SHA256 2020 CA1
Algorithm	RSA-SHA256
Valid form	07/10/2024
Expiration	04/29/2025
Signed	Certificate is not self signed
Additional Domains	*.cancer.gov ncif5.cancer.gov cancer.gov

SSL Checker

Cancer.gov Server Information

Cancer.gov Server Location

Where website hosting server is located?

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Cancer.gov ASN Information

Information about IP address owner

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ASN ID: 6150

ASN Title: NCIFCRF - National Cancer Institute/Frederick Cancer Research, US

Updated: 04/10/2025

Raw ASN data:

Geolocation

ASN Lookup

Cancer.gov Domain Name Information

Cancer.gov DNS Information

Domain name service records

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A
MX
NS
TXT
SOA

Host	A Record	TTL
cancer.gov	129.43.254.31	3600

Host	MX Record	Priority	TTL
cancer.gov	nihcesxwayst06.hub.nih.gov	10	3600
cancer.gov	nihcesxway4.hub.nih.gov	10	3600
cancer.gov	nihcesxway.hub.nih.gov	10	3600
cancer.gov	nihcesxwayst04.hub.nih.gov	10	3600
cancer.gov	nihcesxway5.hub.nih.gov	10	3600
cancer.gov	nihcesxwayst02.hub.nih.gov	10	3600
cancer.gov	nihcesxwayst03.hub.nih.gov	10	3600
cancer.gov	nihcesxwayst05.hub.nih.gov	10	3600
cancer.gov	nihcesxway3.hub.nih.gov	10	3600
cancer.gov	nihcesxwayst01.hub.nih.gov	10	3600
cancer.gov	nihcesxway2.hub.nih.gov	10	3600

Host	NS Record	TTL
cancer.gov	ns3.nih.gov	3600
cancer.gov	ns2.nih.gov	3600
cancer.gov	ns.nih.gov	3600

Host	TXT Record	TTL
cancer.gov	a/MYD7ruuKvW/ln4j50WGOR3Ms9scfgPXKrR4FASC80qVun5eHuz/6s5Xxh/IsTAaDc5+wweHS9ti7aY/jevfA==	3600
cancer.gov	google-site-verification=xtotja2khgp7lafpuwbTxpd0-GTHamG6B-n_BlJHaYY	3600
cancer.gov	v=spf1 include:nih.gov ~all	3600

Cancer.gov Whois Information

Information about registered users or assignees of an Internet resource

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Raw WHOIS data:

Domain Name: cancer.gov
Registrar WHOIS Server: whois.nic.gov
Registrar URL: https://get.gov
Updated Date: 2024-04-01T20:16:07Z
Creation Date: 1999-08-23T20:37:15Z
Registry Expiry Date: 2025-09-22T19:03:23Z
Registrar: Cybersecurity and Infrastructure Security Agency
Registrar IANA ID: 8888888
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: REDACTED FOR PRIVACY
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: REDACTED FOR PRIVACY
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: REDACTED FOR PRIVACY
Registrant Phone: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Email: REDACTED FOR PRIVACY
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Email: REDACTED FOR PRIVACY
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Email: REDACTED FOR PRIVACY
Registry Security ID: REDACTED FOR PRIVACY
Security Name: REDACTED FOR PRIVACY
Security Organization: REDACTED FOR PRIVACY
Security Street: REDACTED FOR PRIVACY
Security City: REDACTED FOR PRIVACY
Security State/Province: REDACTED FOR PRIVACY
Security Postal Code: REDACTED FOR PRIVACY
Security Country: REDACTED FOR PRIVACY
Security Phone: REDACTED FOR PRIVACY
Security Email: ResponsibleDisclosure@hhs.gov
Name Server: ns.nih.gov
Name Server: ns2.nih.gov
Name Server: ns3.nih.gov
DNSSEC: signedDelegation
>>> Last update of WHOIS database: 2024-09-10T20:08:35Z

Whois

DNS Lookup

Cancer.gov HTML Validation

Cancer.gov W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:

X-UA-Compatible HTTP header must have the value “IE=edge”, was “IE=10”.

Bad value “60%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.

Element “div” is missing one or more of the following attributes: “role”.

Element “br” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Attribute “a” not allowed on element “a” at this point.

Warnings:

The “type” attribute is unnecessary for JavaScript resources.

The “banner” role is unnecessary for element “header”.

The “navigation” role is unnecessary for element “nav”.

HTML Validator

Cancer.gov Desktop Performance

How Well Cancer.gov Performs On Desktops?

Website desktop performance and usability tips

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Speed
Resource Breakdown

Speed

54%

Optimize images

Leverage browser caching

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Minify JavaScript

Enable compression

Updated: 06/14/2016

Cancer.gov Mobile Performance

How Optimized Is Cancer.gov for Mobile Devices?

Tips on speeding up mobile site performance

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Usability
Speed
Resource Breakdown

Usability

99%

Size tap targets appropriately

Updated: 06/06/2017

Cancer.gov Nearest Competitors

Estimated Nearest Competitors Of Cancer.gov

uber.com
olympics.com
va.gov
ilo.org
garmin.com
libsyn.com
today.com
gob.ar
uspto.gov
bu.edu
cancer.gov
digitalocean.com
khanacademy.org
sap.com
w***x.com
schneier.com
wa.gov
dhs.gov
c***n.com
treasury.gov
p*******s.com
t***********t.com

Cancer.gov URL Typos

Most common user URL mistypes for cancer.gov

www.cancer.com
www.cancer.net
www.cancer.org
www.cancer.info
www.cancer.biz
www.cancer.us
www.cancer.mobi
www.ancer.gov
www.cancer.gov
www.xancer.gov
www.cxancer.gov
www.xcancer.gov
www.dancer.gov
www.cdancer.gov
www.dcancer.gov
www.fancer.gov
www.cfancer.gov
www.fcancer.gov
www.vancer.gov
www.cvancer.gov
www.vcancer.gov
www.cncer.gov
www.cqncer.gov
www.caqncer.gov
www.cqancer.gov
www.cwncer.gov
www.cawncer.gov
www.cwancer.gov
www.csncer.gov
www.casncer.gov
www.csancer.gov
www.czncer.gov
www.cazncer.gov
www.czancer.gov
www.cacer.gov
www.cabcer.gov
www.canbcer.gov
www.cabncer.gov
www.cahcer.gov
www.canhcer.gov
www.cahncer.gov
www.cajcer.gov
www.canjcer.gov
www.cajncer.gov
www.camcer.gov
www.canmcer.gov
www.camncer.gov
www.caner.gov
www.canxer.gov
www.cancxer.gov
www.canxcer.gov
www.cander.gov
www.cancder.gov
www.candcer.gov
www.canfer.gov
www.cancfer.gov
www.canfcer.gov
www.canver.gov
www.cancver.gov
www.canvcer.gov
www.cancr.gov
www.cancwr.gov
www.cancewr.gov
www.cancwer.gov
www.cancsr.gov
www.cancesr.gov
www.cancser.gov
www.cancdr.gov
www.cancedr.gov
www.cancrr.gov
www.cancerr.gov
www.cancrer.gov
www.cance.gov
www.cancee.gov
www.cancere.gov
www.canceer.gov
www.canced.gov
www.cancerd.gov
www.cancef.gov
www.cancerf.gov
www.cancefr.gov
www.cancet.gov
www.cancert.gov
www.cancetr.gov

Total Resources	74
Number of Hosts	14
Static Resources	62
JavaScript Resources	18
CSS Resources	3

CSS	461.3 KBytes
Images	1.6 MBytes
HTML	170.0 KBytes
JavaScript	2.5 MBytes
Other	38.9 KBytes

Total Resources	84
Number of Hosts	21
Static Resources	69
JavaScript Resources	27
CSS Resources	4

CSS	524.5 KBytes
Images	1.5 MBytes
HTML	171.0 KBytes
JavaScript	2.5 MBytes
Other	22.3 KBytes