Cseligman.com Website of Professor of Astronomy and Author Courtney Seligman

cseligman.com, website of Professor of Astronomy and Author Courtney Seligman, including online astronomy text and sky atlas, and discussions of his f...

Cseligman.com Overview

Cseligman.com ranking shows that the page is at position 727,425 over the world, while the bulk of its audience is from United States, where it ranks 231,783.

It is beneficial to cseligman.com that their hosting company HOSTP-LA, CA servers are located in United States, as that reduces page load time for the majority of their users. See the list of other webpages hosted on HOSTP-LA, CA servers.

In terms of rank-to-traffic ratio, cseligman.com has 844 unique users per day, viewing 1,012 pages. The rank based value of cseligman.com is 9,461 USD. Every user makes 1.30 pageviews on average.

Cseligman.com boasts a link base consisting of 581 referring domains and 707 external backlinks, as revealed by the data obtained from web network scanning.

Cseligman.com top-level domain belongs to .COM domain zone. Check other webpages in .COM zone.

According the last verification test in July 06, 2024, cseligman.com has an expired SSL certificate issued by Let's Encrypt (expired on September 23, 2024). 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, Google Safe Search, Symantec and Web of Trust cseligman.com is a fairly safe domain.

According the Mobile-Friendly test by Google cseligman.com is nice optimized for mobile devices and tablets.

Cseligman.com Rank Summary

Global Rank

727,425

Average Load Time

0.28sec

Links In Count

249

Website Value

$8,760

Audience Geography. Where are cseligman.com visitors located?

Country	Visitors
United States US	42.7%
India IN	15.8%
Other	41.7%

Country	Pageviews
United States US	43.3%
India IN	15.5%
Other	41.2%

Country	Rank
India IN	187083
United States US	231783

Where do visitors go on cseligman.com?

Subdomain	Pageviews
cseligman.com	100%

Subdomain	Pageviews per User
cseligman.com	1.1

Subdomain	Reach
cseligman.com	100%

How popular is cseligman.com?

Period	Global Rank	Global Rank Delta
past 3 months	727425	120136
past month	570110	-293403
past week	616261	-10989
yesterday	761269	-765205

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	1108001	164108	2	-19.29%	1.2	0.9%
30	903397	-292042	3	60%	1.1	-18.71%
7	921832	46016	3	-2.23%	1	-15.6%
1	888437	-734779	2	300%	1	-0.99%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	606116	103767	72	-20.22%
30	468104	-306550	1	90%
7	516314	-36957	1	20%
1	693027	-770113	9	300%

Cseligman.com Website Safety

Overview

Last Updated: 10/07/2025

Overall result - cseligman.com 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: 03/31/2025

cseligman.com is safe.

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

Google Safe Search

Last Updated: 12/21/2016

cseligman.com 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

cseligman.com 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: 03/01/2021

cseligman.com is safe.

McAfee assesses cseligman.com 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 cseligman.com for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/11/2019

cseligman.com child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	www.erindalepublishing.cseligman.com
Issuer Organization	Let's Encrypt
Issuer	R11
Algorithm	RSA-SHA256
Valid form	06/25/2024
Expiration	09/23/2024
Signed	Certificate is not self signed
Additional Domains	.cseligman.com .erindalepublishing.com cseligman.com erindalepublishing.com www.erindalepublishing.cseligman.com

Cseligman.com Rank History

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

Cseligman.com Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 23273

ASN Title: HOSTP-LA, CA

Last Update: 07/13/2025

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2021, American Registry for Internet Numbers, Ltd.
#

ASNumber: 23273
ASName: HOSTP-LA
ASHandle: AS23273
RegDate: 2002-02-20
Updated: 2021-05-19
Ref: https://rdap.arin.net/registry/autnum/23273

OrgName: HostPapa
OrgId: HOSTP-7
Address: 115 George St.
Address: Suite 511
City: Oakville
StateProv: ON
PostalCode: L6J 0A2
Country: CA
RegDate: 2016-06-06
Updated: 2021-10-26
Ref: https://rdap.arin.net/registry/entity/HOSTP-7

OrgTechHandle: NETTE9-ARIN
OrgTechName: NETTECH
OrgTechPhone: +1-905-315-3455
OrgTechEmail: net-tech@hostpapa.com
OrgTechRef: https://rdap.arin.net/registry/entity/NETTE9-ARIN

OrgAbuseHandle: NETAB23-ARIN
OrgAbuseName: NETABUSE
OrgAbusePhone: +1-905-315-3455
OrgAbuseEmail: net-abuse@hostpapa.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/NETAB23-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2021, American Registry for Internet Numbers, Ltd.
#

Cseligman.com Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: CSELIGMAN.COM
Registry Domain ID: 93479892_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.tucows.com
Registrar URL: http://www.tucows.com
Updated Date: 2018-01-14T10:23:15Z
Creation Date: 2002-12-28T13:03:05Z
Registry Expiry Date: 2026-12-28T13:03:05Z
Registrar: Tucows Domains Inc.
Registrar IANA ID: 69
Registrar Abuse Contact Email: domainabuse@tucows.com
Registrar Abuse Contact Phone: +1.4165350123
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Name Server: NS6.LUNARPAGES.COM
Name Server: NS7.LUNARPAGES.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-11-15T10:14:55Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
cseligman.com	204.44.192.50	14400

Host	MX Record	Priority	TTL
cseligman.com	cseligman.com	0	14400

Host	NS Record	TTL
cseligman.com	ns1.lp.hostpapa.com	86400
cseligman.com	ns2.lp.hostpapa.com	86400

Host	TXT Record	TTL
cseligman.com	v=spf1 +a +mx +ip4:204.44.192.50 +include:spf.antispamcloud.com +include:spf.servername.online +ip4:216.97.230.75 ~all	14400

ns1.lp.hostpapa.com
TTL: 86400
Email address: admin.hostpapa.ca
Serial: 2023022301
Refresh: 3600
Retry: 1800
Expire: 1209600
Minimum: 86400

Cseligman.com HTML Check

HTML Validation Tool

Errors

Internal encoding declaration “iso-8859-1” disagrees with the actual encoding of the document (“utf-8”).

Bad value “ISO-8859-1” for attribute “charset” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.

The “bgcolor” attribute on the “body” element is obsolete. Use CSS instead.

The “link” attribute on the “body” element is obsolete. Use CSS instead.

The “alink” attribute on the “body” element is obsolete. Use CSS instead.

The “vlink” attribute on the “body” element is obsolete. Use CSS instead.

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

The “align” attribute on the “td” element is obsolete. Use CSS instead.

The “valign” attribute on the “td” element is obsolete. Use CSS instead.

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “bgcolor” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “height” attribute on the “td” element is obsolete. Use CSS instead.

Attribute “background” not allowed on element “td” at this point.

The “width” attribute on the “td” element is obsolete. Use CSS instead.

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

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

End tag “b” violates nesting rules.

Attribute “valign” not allowed on element “iframe” at this point.

Attribute “verticalscrolling” not allowed on element “iframe” at this point.

Attribute “horizontalscrolling” not allowed on element “iframe” at this point.

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

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

The element “iframe” must not appear as a descendant of the “a” element.

End tag “td” seen, but there were open elements.

Unclosed element “a”.

Stray end tag “td”.

Stray end tag “tr”.

Stray end tag “table”.

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

End tag for “body” seen, but there were unclosed elements.

Unclosed element “center”.

Warnings

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

Cseligman.com Desktop Performance

Last tested: 10/11/2019

Desktop Speed

95%

Optimize images

Leverage browser caching

Desktop Resource Breakdown

Total Resources	21
Number of Hosts	5
Static Resources	15
JavaScript Resources	3

Cseligman.com Mobile Insights

Last tested: 08/12/2019

Mobile Usability

63%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Mobile Speed

95%

Optimize images

Leverage browser caching

Mobile Resource Breakdown

Total Resources	21
Number of Hosts	5
Static Resources	15
JavaScript Resources	3

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Cseligman.com Website of Professor of Astronomy and Author Courtney Seligman