Isotopes.gov | NIDC: National Isotope Development Center

Isotopes.gov Overview

Isotopes.gov belongs to FASTLY - Fastly, US. Check the list of other websites hosted by FASTLY - Fastly, US.

Isotopes.gov boasts a link base consisting of 243 referring domains and 300 external backlinks, as revealed by the data obtained from web network scanning.

Isotopes.gov top-level domain belongs to .GOV domain zone. Check other webpages in .GOV zone.

According the last verification test in March 04, 2022, isotopes.gov has an expired SSL certificate issued by Internet2 (expired on May 13, 2022). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Internet2.

Based on data from Google Safe Browsing, Symantec and Web of Trust isotopes.gov is a fairly safe domain.

Based on Mobile-Friendly test by Google isotopes.gov is poorly optimized for mobile phones and tablets. Remember that optimizing your website design for mobile devices ensures that all of your web pages perform well on all devices.

Isotopes.gov Website Safety

Overview

Last Updated: 06/06/2025

Unknown status.

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

Last Updated: 03/02/2025

isotopes.gov is safe.

Norton ConnectSafe evaluates isotopes.gov for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 06/06/2025

Not yet checked.

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.

Google Safe Browsing

Last Updated: 01/10/2019

isotopes.gov is safe.
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.

Site Advisor

Last Updated: 03/21/2021

isotopes.gov is safe.

McAfee assesses isotopes.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 isotopes.gov for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/13/2019

isotopes.gov child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	www.isotopes.gov
Issuer Organization	Internet2
Issuer	InCommon RSA Server CA
Algorithm	RSA-SHA256
Valid form	05/13/2021
Expiration	05/13/2022
Signed	Certificate is not self signed
Additional Domains	www.isotopes.gov isotopes.gov

Isotopes.gov Rank History

Alexa Rank shows how popular isotopes.gov is in comparison with other sites. The most popular site has Alexa Rank equals 1. If isotopes.gov 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 isotopes.gov and pageviews on isotopes.gov over the past 3 months.

Isotopes.gov Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 54113

ASN Title: FASTLY - Fastly, US

Last Update: 01/17/2025

#
# 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.
#

Isotopes.gov Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: isotopes.gov
Registrar WHOIS Server: whois.cloudflareregistry.com
Registrar URL:
Updated Date: 2024-01-08T03:07:29Z
Creation Date: 2011-04-11T10:16:09Z
Registry Expiry Date: 2025-04-11T10:16:09Z
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 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 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 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 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 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: security@ornl.gov
Name Server: ns3.ornl.gov
Name Server: ns4.ornl.gov
Name Server: ns5.ornl.gov
Name Server: ns6.ornl.gov
Name Server: ns7.ornl.gov
Name Server: ns8.ornl.gov
DNSSEC: signedDelegation
>>> Last update of WHOIS database: 2024-04-18T16:05:30Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Isotopes.gov HTML Check

HTML Validation Tool

Errors

Obsolete doctype. Expected “<!DOCTYPE html>”.

The “center” element is obsolete. Use CSS instead.

End tag “a” violates nesting rules.

No “b” element in scope but a “b” end tag seen.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

No “p” element in scope but a “p” end tag seen.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Isotopes.gov Desktop Performance

Last tested: 06/06/2018

Desktop Speed

81%

Leverage browser caching

Optimize images

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

Enable compression

Minify HTML

Minify CSS

Desktop Resource Breakdown

Total Resources	28
Number of Hosts	7
Static Resources	19
JavaScript Resources	7
CSS Resources	2

Isotopes.gov Mobile Insights

Last tested: 06/06/2018

Mobile Usability

59%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Size content to viewport

Mobile Speed

69%

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

Leverage browser caching

Optimize images

Enable compression

Minify HTML

Minify CSS

Mobile Resource Breakdown

Total Resources	29
Number of Hosts	8
Static Resources	20
JavaScript Resources	7
CSS Resources	2

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