Usaco.guide USACO Guide
A free collection of curated, high-quality competitive programming resources to take you from USACO Bronze to USACO Platinum and beyond. Written by to...
Usaco.guide Overview
Usaco.guide belongs to AMAZON-02 - Amazon.com, Inc., US. Check the list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.
In terms of rank-to-traffic ratio, usaco.guide has 1,874 unique users per day, viewing 3,785 pages. The rank based value of usaco.guide is 2,854 USD. Every user makes 2.14 pageviews on average.
Usaco.guide boasts a link base consisting of 242 referring domains and 285 external backlinks, as revealed by the data obtained from web network scanning.
Usaco.guide top-level domain belongs to .GUIDE domain zone. Check other webpages in .GUIDE zone.
According the last verification test in September 21, 2020, usaco.guide has an expired SSL certificate issued by Let's Encrypt (expired on December 05, 2020). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Let's Encrypt.
Based on data from Google Safe Browsing and Symantec usaco.guide is a fairly safe domain.
Usaco.guide Website Safety
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 usaco.guide 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 usaco.guide 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 usaco.guide for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the usaco.guide. This reputation system receives ratings from users and information from third-party sources, assesses the usaco.guide for safety features and confirms, whether usaco.guide is suitable for children.
| Domain | usaco.guide |
| Issuer Organization | Let's Encrypt |
| Issuer | Let's Encrypt Authority X3 |
| Algorithm | RSA-SHA256 |
| Valid form | 09/06/2020 |
| Expiration | 12/05/2020 |
| Signed | Certificate is not self signed |
| Additional Domains |
usaco.guide |
Usaco.guide Rank History
Alexa Rank shows how popular usaco.guide is in comparison with other sites. The most popular site has Alexa Rank equals 1. If usaco.guide 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 usaco.guide and pageviews on usaco.guide over the past 3 months.
Usaco.guide Hosting Information
ASN ID: 16509
ASN Title: AMAZON-02 - Amazon.com, Inc., USLast Update: 06/16/2024
#
# 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: 16509
ASName: AMAZON-02
ASHandle: AS16509
RegDate: 2000-05-03
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/16509
OrgName: Amazon.com, Inc.
OrgId: AMAZON-4
Address: 1918 8th Ave
City: SEATTLE
StateProv: WA
PostalCode: 98101-1244
Country: US
RegDate: 1995-01-23
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/AMAZON-4
OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN
OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN
RTechHandle: AC6-ORG-ARIN
RTechName: Amazon-com Incorporated
RTechPhone: +1-206-266-2187
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/AC6-ORG-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.
#
Usaco.guide Domain Registration and Settings
Domain Name: usaco.guide
Registry Domain ID: 17ef6eb499e94bebb1fe2d599febfa8f-DONUTS
Registrar WHOIS Server: http://whois.cloudflare.com
Registrar URL: http://cloudflare.com
Updated Date: 2022-08-12T19:01:34Z
Creation Date: 2020-09-06T21:17:32Z
Registry Expiry Date: 2023-09-06T21:17:32Z
Registrar: Cloudflare, Inc
Registrar IANA ID: 1910
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Competitive Programming Initiative
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: CA
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: roxy.ns.cloudflare.com
Name Server: miles.ns.cloudflare.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-10-24T13:08:52Z
| Host | A Record | TTL |
|---|---|---|
| usaco.guide | 76.76.21.21 | 60 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| usaco.guide | eforward5.registrar-servers.com | 20 | 1800 |
| usaco.guide | eforward4.registrar-servers.com | 15 | 1800 |
| usaco.guide | eforward1.registrar-servers.com | 10 | 1800 |
| usaco.guide | eforward2.registrar-servers.com | 10 | 1800 |
| usaco.guide | eforward3.registrar-servers.com | 10 | 1800 |
| Host | NS Record | TTL |
|---|---|---|
| usaco.guide | dns1.registrar-servers.com | 1800 |
| usaco.guide | dns2.registrar-servers.com | 1800 |
| Host | TXT Record | TTL |
|---|---|---|
| usaco.guide | google-site-verification=EediNHStqrEG4BOEkCBuSkDYk9yJkFbAeI_JjBl5bOc | 60 |
| usaco.guide | v=spf1 include:spf.efwd.registrar-servers.com ~all | 1800 |
dns1.registrar-servers.com
TTL: 3601
Email address: hostmaster.registrar-servers.com
Serial: 1599427976
Refresh: 43200
Retry: 3600
Expire: 604800
Minimum: 3601
Usaco.guide HTML Check
not found
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