Htdp.org How to Design Programs
Server IP address resolved: Yes
Http response code: 200
Response time: 0.65 sec.
Last Checked: 02/02/2025
Htdp.org attracts 845 unique visitors daily, generating 2,367 pageviews. The estimated value of htdp.org is 42,179 USD. Each visitor views approximately 3.00 pages on average.
According to Majestic's traffic estimates, htdp.org ranks 25,005 globally, with the majority of its visitors coming from United States, where it holds the 156,603 position.
It is beneficial for htdp.org that their data center (provided by FASTLY - Fastly, US) is located in United States, as this helps reduce page load time for most visitors.
See the list of other websites hosted by FASTLY - Fastly, US.
Htdp.org is registered with the .ORG top-level domain. Explore additional websites within the .ORG zone.
A recent examination on (October 07, 2024), indicates that htdp.org has an expired SSL certificate issued by Let's Encrypt (expired on November 29, 2024). Click the "Refresh" button in the Safety Information section for updated SSL details. See the list of websites using SSL certificates issued by Let's Encrypt.
According to Google Safe Browsing, Google Safe Search, Symantec and Web of Trust htdp.org appears to be a safe domain.
Based on Google's Mobile-Friendly test, htdp.org is optimized for mobile and tablet devices.
Audience Geography. Where are htdp.org visitors located?
| Country | Visitors |
|---|---|
 United States US | 46.1% |
| Russian Federation RU | 1.9% |
| Other | 52.2% |
| Country | Pageviews |
|---|---|
| United States US | 40.3% |
| Russian Federation RU | 3.7% |
| Other | 55.9% |
| Country | Rank |
|---|---|
| United States US | 156603 |
| Russian Federation RU | 371013 |
Where do visitors go on htdp.org?
| Subdomain | Pageviews |
|---|---|
| htdp.org | 100% |
| Subdomain | Pageviews per User |
|---|---|
| htdp.org | 2.5 |
| Subdomain | Reach |
|---|---|
| htdp.org | 100% |
How popular is htdp.org?
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 302607 | 11137 |
| past month | 397475 | -2592 |
| past week | 558777 | -14957 |
| yesterday | 479344 | -60566 |
| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
|---|---|---|---|---|---|---|
| 90 | 320744 | 57402 | 12 | -21.32% | 2.8 | -25.27% |
| 30 | 447998 | 14330 | 8 | -6.677% | 2.5 | -7.547% |
| 7 | 473117 | -65672 | 8 | 30% | 4 | 30% |
| 1 | 251737 | -172827 | 2 | 100% | 9 | 100% |
| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
|---|---|---|---|---|
| 90 | 315904 | -9194 | 16 | 5% |
| 30 | 405294 | -10784 | 12 | 0.6% |
| 7 | 667551 | 30825 | 8 | 8% |
| 1 | 678633 | 1011 | 8 | -1.7% |
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 ConnectSafe evaluates htdp.org for any unsafe and insecure content. The results are critical for families with young children.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee assesses htdp.org 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 htdp.org for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the htdp.org. This reputation system receives ratings from users and information from third-party sources, assesses the htdp.org for safety features and confirms, whether htdp.org is suitable for children.
| Domain | htdp.org |
| Issuer Organization | Let's Encrypt |
| Issuer | R10 |
| Algorithm | RSA-SHA256 |
| Valid form | 08/31/2024 |
| Expiration | 11/29/2024 |
| Signed | Certificate is not self signed |
| Additional Domains |
htdp.org www.htdp.org |
ASN ID: 54113
ASN Title: FASTLY - Fastly, US
Last Update: 07/31/2024
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
ASNumber: 54113
ASName: FASTLY
ASHandle: AS54113
RegDate: 2011-10-04
Updated: 2012-03-02
Comment: http://www.fastly.com/
Ref: https://rdap.arin.net/registry/autnum/54113
OrgName: Fastly
OrgId: SKYCA-3
Address: PO Box 78266
City: San Francisco
StateProv: CA
PostalCode: 94107
Country: US
RegDate: 2011-09-16
Updated: 2017-03-30
Ref: https://rdap.arin.net/registry/entity/SKYCA-3
OrgNOCHandle: FNO19-ARIN
OrgNOCName: Fastly Network Operations
OrgNOCPhone: +1-415-404-9374
OrgNOCEmail: noc@fastly.com
OrgNOCRef: https://rdap.arin.net/registry/entity/FNO19-ARIN
OrgTechHandle: FRA19-ARIN
OrgTechName: Fastly RIR Administrator
OrgTechPhone: +1-415-404-9374
OrgTechEmail: rir-admin@fastly.com
OrgTechRef: https://rdap.arin.net/registry/entity/FRA19-ARIN
OrgAbuseHandle: ABUSE4771-ARIN
OrgAbuseName: Abuse Account
OrgAbusePhone: +1-415-496-9353
OrgAbuseEmail: abuse@fastly.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE4771-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
Domain Name: htdp.org
Registry Domain ID: 96a838bedf324209bf98a95a3efac1a9-LROR
Registrar WHOIS Server: whois.squarespace.domains
Registrar URL: https://domains.squarespace.com
Updated Date: 2024-05-07T20:11:00Z
Creation Date: 2001-06-29T14:32:48Z
Registry Expiry Date: 2025-06-29T14:32:48Z
Registrar: Squarespace Domains II LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: abuse-complaints@squarespace.com
Registrar Abuse Contact Phone: +1.6466935324
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization:
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: RI
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
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 Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
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 Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns-cloud-b1.googledomains.com
Name Server: ns-cloud-b4.googledomains.com
Name Server: ns-cloud-b2.googledomains.com
Name Server: ns-cloud-b3.googledomains.com
DNSSEC: signedDelegation
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-10-18T23:52:53Z
| Host | A Record | TTL |
|---|---|---|
| htdp.org | 128.148.32.110 | 3600 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| htdp.org | aspmx.l.google.com | 0 | 3600 |
| htdp.org | aspmx2.googlemail.com | 10 | 3600 |
| htdp.org | aspmx3.googlemail.com | 10 | 3600 |
| htdp.org | alt1.aspmx.l.google.com | 5 | 3600 |
| htdp.org | alt2.aspmx.l.google.com | 5 | 3600 |
| Host | NS Record | TTL |
|---|---|---|
| htdp.org | ns-1106.awsdns-10.org | 172800 |
| htdp.org | ns-2035.awsdns-62.co.uk | 172800 |
| htdp.org | ns-372.awsdns-46.com | 172800 |
| htdp.org | ns-699.awsdns-23.net | 172800 |
| Host | TXT Record | TTL |
|---|---|---|
| htdp.org | v=spf1 -all | 3600 |
ns-699.awsdns-23.net
TTL: 900
Email address: awsdns-hostmaster.amazon.com
Serial: 1
Refresh: 7200
Retry: 900
Expire: 1209600
Minimum: 86400
Last tested: 12/05/2017
| Total Resources | 4 |
| Number of Hosts | 1 |
| Static Resources | 3 |
Last tested: 12/03/2017
| Total Resources | 4 |
| Number of Hosts | 1 |
| Static Resources | 3 |
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