psi.edu ▷ Planetary Science Institute | A Nonprofit 501(c)(3) Corporation

Quick Summary

Online Status

Online

Server IP address resolved: Yes
Http response code: 200
Response time: 0.83 sec.
Last Checked: 06/19/2025

Psi.edu traffic volume is 732 unique daily visitors and their 732 pageviews. The web value rate of psi.edu is 6,249 USD. Each visitor makes around 1.07 page views on average.

By Alexa's traffic estimates psi.edu placed at 37,591 position over the world.

Psi.edu server is located in United States, therefore, we cannot identify the countries where the traffic is originated and if the distance can potentially affect the page load time. See the list of other web pages hosted by CLOUDFLARENET - Cloudflare, Inc., US.

Psi.edu registered under .EDU top-level domain. Check other websites in .EDU zone.

The last verification results, performed on (June 10, 2025) psi.edu show that psi.edu has a valid and up-to-date SSL certificate issued by Google Trust Services expiring on August 01, 2025. Click “Refresh” button for SSL Information at the Safety Information section. Check the list of websites using SSL certificates issued by Google Trust Services.

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

Relying Google MobileFriendly test psi.edu is well optimized for mobile and tablet devices, however web page loading speed may be improved.

Psi.edu General Information

Global Rank

1,010,112

Average Load Time

0.34sec

Links In Count

547

Website Value

$5,840

Audience Geography. Where are psi.edu visitors located?

Country	Visitors

Country	Pageviews

Country	Rank

Where do visitors go on psi.edu?

Subdomain	Pageviews

Subdomain	Pageviews per User

Subdomain	Reach

How popular is psi.edu?

Period	Global Rank	Global Rank Delta
past 3 months	1010112	367759
past month	1236486	169756
past week	943508	162944

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	1400308	747876	2	-64.372%	1	-53.597%
30	1682080	300877	1	-22.87%	1	-15.97%
7	1188076	142155	2	-23.14%	1	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	885572	206186	48	-23.6%
30	1047286	94973	5	-8.295%
7	815325	143192	7	-23.14%

Psi.edu Safety Information

Overview

Last Updated: 06/19/2025

Overall result - psi.edu is safe.

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: 02/10/2025

psi.edu is safe.

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

Google Safe Search

Last Updated: 03/03/2019

psi.edu is safe.

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: 01/09/2019

psi.edu 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: 02/14/2021

psi.edu is safe.

McAfee assesses psi.edu 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 psi.edu for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/11/2019

psi.edu child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	psi.edu
Issuer Organization	Google Trust Services
Issuer	WE1
Algorithm	ecdsa-with-SHA256
Valid form	05/03/2025
Expiration	08/01/2025
Signed	Certificate is not self signed
Additional Domains	psi.edu *.psi.edu

Psi.edu Server Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 13335
ASN Title: CLOUDFLARENET - Cloudflare, Inc., US

Last Update: 04/22/2025

ASN Whois

#
# 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: 13335
ASName: CLOUDFLARENET
ASHandle: AS13335
RegDate: 2010-07-14
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/autnum/13335

OrgName: Cloudflare, Inc.
OrgId: CLOUD14
Address: 101 Townsend Street
City: San Francisco
StateProv: CA
PostalCode: 94107
Country: US
RegDate: 2010-07-09
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/entity/CLOUD14

OrgTechHandle: ADMIN2521-ARIN
OrgTechName: Admin
OrgTechPhone: +1-650-319-8930
OrgTechEmail: rir@cloudflare.com
OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

OrgAbuseHandle: ABUSE2916-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-650-319-8930
OrgAbuseEmail: abuse@cloudflare.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

OrgNOCHandle: NOC11962-ARIN
OrgNOCName: NOC
OrgNOCPhone: +1-650-319-8930
OrgNOCEmail: noc@cloudflare.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RNOCHandle: NOC11962-ARIN
RNOCName: NOC
RNOCPhone: +1-650-319-8930
RNOCEmail: noc@cloudflare.com
RNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RTechHandle: ADMIN2521-ARIN
RTechName: Admin
RTechPhone: +1-650-319-8930
RTechEmail: rir@cloudflare.com
RTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

RAbuseHandle: ABUSE2916-ARIN
RAbuseName: Abuse
RAbusePhone: +1-650-319-8930
RAbuseEmail: abuse@cloudflare.com
RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-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.
#

Psi.edu Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

This Registry database contains ONLY .EDU domains.
The data in the EDUCAUSE Whois database is provided
by EDUCAUSE for information purposes in order to
assist in the process of obtaining information about
or related to .edu domain registration records.

The EDUCAUSE Whois database is authoritative for the
.EDU domain.

A Web interface for the .EDU EDUCAUSE Whois Server is
available at: http://whois.educause.edu

By submitting a Whois query, you agree that this information
will not be used to allow, enable, or otherwise support
the transmission of unsolicited commercial advertising or
solicitations via e-mail. The use of electronic processes to
harvest information from this server is generally prohibited
except as reasonably necessary to register or modify .edu
domain names.

-------------------------------------------------------------

Domain Name: PSI.EDU

Registrant:
Planetary Science Institute
1700 East Ft Lowell Road, Suite 106
Tucson, AZ 85719
USA

Administrative Contact:
Annie Wilson
Planetary Science Institute
1700 East Ft Lowell Road, Suite 106
Tucson, AZ 85719
USA
+1.5206226300
awilson@psi.edu

Technical Contact:
Annie Wilson
Planetary Science Institute
1700 East Ft Lowell Road, Suite 106
Tucson, AZ 85719
USA
+1.5206226300
support@psi.edu

Name Servers:
PRANAB.NS.CLOUDFLARE.COM
ANASTASIA.NS.CLOUDFLARE.COM

Domain record activated: 29-Apr-1992
Domain record last updated: 20-Sep-2023
Domain expires: 31-Jul-2026

DNS Records

DNS Lookup Tool

Host	A Record	TTL
psi.edu	104.22.22.219	300
psi.edu	172.67.40.163	300
psi.edu	104.22.23.219	300

Host	MX Record	Priority	TTL
psi.edu	aspmx.l.google.com	10	300
psi.edu	alt1.aspmx.l.google.com	20	300
psi.edu	alt2.aspmx.l.google.com	30	300
psi.edu	aspmx2.googlemail.com	40	300
psi.edu	aspmx3.googlemail.com	50	300

Host	NS Record	TTL
psi.edu	anastasia.ns.cloudflare.com	86400
psi.edu	pranab.ns.cloudflare.com	86400

Host	TXT Record	TTL
psi.edu	MS=ms53177145	60
psi.edu	atlassian-domain-verification=Zh1Dib3o0lyzS3P2dow5lZCQtogn1SPSjo43WEpaavyLiiT6MA9LrRdYa/5vl9uU	60
psi.edu	google-site-verification=CUl2G9Q_Ii1dwiT5ZwvRpneR7XpdJTkIDG2tF2_sG7k	60
psi.edu	have-i-been-pwned-verification=dweb_t9br8skwttfddlq2qnhu8ktb	60
psi.edu	ms-domain-verification=f2a56086-167a-4b42-b099-307443eef6a1	60
psi.edu	v=spf1 include:_spf.google.com ~all	60
psi.edu	zone-ownership-verification-add2802cc5753a09dde1d2420ee6a014715014fc84e4b737d18a1466d9cb50bf	60

anastasia.ns.cloudflare.com
TTL: 1800
Email address: dns.cloudflare.com
Serial: 2373435345
Refresh: 10000
Retry: 2400
Expire: 604800
Minimum: 1800

Psi.edu HTML Validation

HTML Validation Tool

Errors

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

Attribute “xmlns:og” not allowed here.

Attribute “xmlns:article” not allowed here.

Attribute “xmlns:book” not allowed here.

Attribute “xmlns:profile” not allowed here.

Attribute “xmlns:video” not allowed here.

Attribute “xmlns:product” not allowed here.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.

Attribute “xmlns:xsd” not allowed here.

Attribute “xmlns:fb” not allowed here.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.

The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.

Stray end tag “span”.

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

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

Attribute “about” not allowed on element “div” at this point.

Attribute “content” not allowed on element “span” at this point.

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

The hash-name reference in attribute “usemap” referred to “Image-Maps_1201209131733308”, but there is no “map” element with a “name” attribute with that value.

Warnings

Attribute with the local name “xmlns:og” is not serializable as XML 1.0.

Attribute with the local name “xmlns:article” is not serializable as XML 1.0.

Attribute with the local name “xmlns:book” is not serializable as XML 1.0.

Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.

Attribute with the local name “xmlns:video” is not serializable as XML 1.0.

Attribute with the local name “xmlns:product” is not serializable as XML 1.0.

Attribute with the local name “xmlns:content” is not serializable as XML 1.0.

Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:foaf” is not serializable as XML 1.0.

Attribute with the local name “xmlns:rdfs” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioct” is not serializable as XML 1.0.

Attribute with the local name “xmlns:skos” is not serializable as XML 1.0.

Attribute with the local name “xmlns:xsd” is not serializable as XML 1.0.

Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Psi.edu Desktop Insights

Last tested: 07/01/2019

Desktop

Desktop Speed

42%

Optimize images

Enable compression

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

Minify JavaScript

Minify CSS

Leverage browser caching

Desktop Resource Breakdown

Total Resources	72
Number of Hosts	5
Static Resources	69
JavaScript Resources	30
CSS Resources	21

Psi.edu Mobile Insights

Last tested: 11/29/2017

Mobile

Mobile Usability

64%

Use legible font sizes

Configure the viewport

Size tap targets appropriately

Size content to viewport

Mobile Speed

46%

Optimize images

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

Minify JavaScript

Leverage browser caching

Mobile Resource Breakdown

Total Resources	33
Number of Hosts	6
Static Resources	30
JavaScript Resources	11
CSS Resources	4

Psi.edu Typos

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Psi.edu Planetary Science Institute | A Nonprofit 501(c)(3) Corporation

Celebrating 50 years Our team of renowned scientists is involved in numerous NASA and international space missions, studying the solar system and beyo...

Quick Summary

Psi.edu General Information

Psi.edu Safety Information

Psi.edu Server Information

Psi.edu Domain Name Information

Psi.edu HTML Validation

Psi.edu Desktop Insights

Psi.edu Mobile Insights

Psi.edu Nearest Competitors

Psi.edu Typos