Htdp.org How to Design Programs
Server IP address resolved: NoHttp response code: None
Last Checked: 03/07/2023
Over the time htdp.org has been ranked as high as 25,005 in the world, while most of its traffic comes from United States, where it reached as high as 156,603 position.
Htdp.org receives about 790 unique visitors and 2,212 pageviews per day. The estimated value of htdp.org is 39,420 USD. Each unique visitor makes about 2.8 pageviews on average.
Htdp.org is registered under .ORG top-level domain. Check other websites in .ORG zone.
At the time of the last check (November 13, 2019) htdp.org has an expired wildcard SSL certificate issued by Internet2 (expired on October 17, 2020). Check other websites using SSL certificates issued by Internet2.
According to Google Safe Browsing, Google Safe Search, Symantec and Web of Trust htdp.org is quite a safe domain.
Mobile-Friendly test indicates that htdp.org is well optimized for mobile and tablet devices.
Audience Geography. Where are htdp.org visitors located?
| Country | Rank |
|---|---|
 United States US | 156603 |
| Russian Federation RU | 371013 |
| Country | Percent of Pageviews |
|---|---|
| United States US | 40.3% |
| Russian Federation RU | 3.7% |
| Other | 55.9% |
| Country | Percent of Visitors |
|---|---|
| United States US | 46.1% |
| Russian Federation RU | 1.9% |
| Other | 52.2% |
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?
| 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% |
| 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% |
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 302607 | 11137 |
| past month | 397475 | -2592 |
| past week | 558777 | -14957 |
| yesterday | 479344 | -60566 |
Alexa Rank shows how popular htdp.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If htdp.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to htdp.org and pageviews on htdp.org over the past 3 months.
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.
"htdp.org" is not a phishing page.
"htdp.org" does not install unwanted software.
"htdp.org" does not contain harmfull applications.
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 | Internet2 |
| Issuer | InCommon RSA Server CA |
| Algorithm | RSA-SHA256 |
| Valid form | 10/18/2018 |
| Expiration | 10/17/2020 |
| Signed | Certificate is not self signed |
| Additional Domains | *.htdp.org htdp.org |
ASN ID: 54113
ASN Title: FASTLY - Fastly, US
Last Update: 10/13/2023
#
# 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: D74020628-LROR
Registrar WHOIS Server: whois.gandi.net
Registrar URL: http://www.gandi.net
Updated Date: 2021-01-30T18:20:11Z
Creation Date: 2001-06-29T14:32:48Z
Registry Expiry Date: 2022-06-29T14:32:48Z
Registrar Registration Expiration Date:
Registrar: Gandi SAS
Registrar IANA ID: 81
Registrar Abuse Contact Email: abuse@support.gandi.net
Registrar Abuse Contact Phone: +33.170377661
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization: How to Design Programs
Registrant State/Province: RI
Registrant Country: US
Name Server: KATE.NS.CLOUDFLARE.COM
Name Server: CLYDE.NS.CLOUDFLARE.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-05-30T16:25:51Z
| 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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