Columbia.edu Columbia University in the City of New York
Server IP address resolved: Yes
Http response code: 200
Response time: 1.09 sec.
Last Checked: 01/14/2023
Over the time columbia.edu has been ranked as high as 263 in the world, while most of its traffic comes from United States, where it reached as high as 850 position.
Columbia.edu receives about 81,828 unique visitors and 249,575 pageviews per day. The estimated value of columbia.edu is 3,285,000 USD. Each unique visitor makes about 3.05 pageviews on average.
Columbia.edu is registered under .EDU top-level domain. Check other websites in .EDU zone.
At the time of the last check (November 28, 2019) columbia.edu has an expired SSL certificate issued by Internet2 (expired on January 19, 2020). Check other websites using SSL certificates issued by Internet2.
According to our information columbia.edu is a suspicious domain.
Mobile-Friendly test indicates that columbia.edu is well optimized for mobile and tablet devices.
Audience Geography. Where are columbia.edu visitors located?
| Country | Rank |
|---|---|
 United States US | 850 |
| Tanzania TZ | 995 |
| Singapore SG | 1402 |
| Philippines PH | 2270 |
| Nigeria NG | 2454 |
| Pakistan PK | 2789 |
| United Arab Emirates AE | 2880 |
| Canada CA | 2902 |
| India IN | 2981 |
| Switzerland CH | 3631 |
| Australia AU | 4326 |
| United Kingdom GB | 4743 |
| Country | Percent of Pageviews |
|---|---|
| United States US | 69.9% |
| India IN | 6.3% |
| Singapore SG | 2.2% |
| Canada CA | 1.4% |
| Australia AU | 1% |
| Japan JP | 1% |
| Nigeria NG | 0.8% |
| Brazil BR | 0.7% |
| United Kingdom GB | 0.7% |
| Other | 16% |
| Country | Percent of Visitors |
|---|---|
| United States US | 55.1% |
| India IN | 10.6% |
| Japan JP | 3.1% |
| Canada CA | 2.5% |
| Pakistan PK | 1.6% |
| Nigeria NG | 1.6% |
| Brazil BR | 1.4% |
| United Kingdom GB | 1.3% |
| Australia AU | 1.2% |
| Other | 21.7% |
Where do visitors go on columbia.edu?
| Subdomain | Pageviews |
|---|---|
| courseworks2.columbia.edu | 27.55% |
| gsb.columbia.edu | 8.04% |
| columbia.edu | 7.55% |
| ldeo.columbia.edu | 5.32% |
| cas.columbia.edu | 4.48% |
| cul.columbia.edu | 4.16% |
| sps.columbia.edu | 2.97% |
| law.columbia.edu | 2.74% |
| cs.columbia.edu | 1.61% |
| other | 35.6% |
| Subdomain | Pageviews per User |
|---|---|
| ldeo.columbia.edu | 10 |
| courseworks2.columbia.edu | 10 |
| cul.columbia.edu | 7.5 |
| sps.columbia.edu | 4.2 |
| opportunities.columbia.edu | 4 |
| finaid.columbia.edu | 4 |
| enterprise.columbia.edu | 4 |
| health.columbia.edu | 4 |
| gs.columbia.edu | 3.4 |
| registrar.columbia.edu | 3 |
| other | 1.6 |
| Subdomain | Reach |
|---|---|
| columbia.edu | 17.19% |
| cas.columbia.edu | 13.78% |
| gsb.columbia.edu | 11% |
| courseworks2.columbia.edu | 8.9% |
| law.columbia.edu | 4.47% |
| math.columbia.edu | 3.56% |
| cs.columbia.edu | 3.27% |
| stat.columbia.edu | 2.9% |
| tc.columbia.edu | 2.85% |
| sps.columbia.edu | 2.39% |
| other | 51.84% |
How popular is columbia.edu?
| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
|---|---|---|---|---|
| 90 | 2798 | 173 | 216 | -6.076% |
| 30 | 2971 | 200 | 205 | -5.508% |
| 7 | 2859 | -170 | 210 | 5% |
| 1 | 2429 | -163 | 260 | 7% |
| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
|---|---|---|---|---|---|---|
| 90 | 3362 | 554 | 166 | -12.66% | 3.05 | -7.012% |
| 30 | 3394 | -79 | 167 | 7% | 3.3 | 10% |
| 7 | 3323 | -984 | 173 | 29% | 3.3 | 20% |
| 1 | 2805 | -393 | 21 | 10% | 3.5 | 4% |
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 2726 | 237 |
| past month | 2869 | 154 |
| past week | 2729 | -360 |
| yesterday | 2289 | -199 |
Alexa Rank shows how popular columbia.edu is in comparison with other sites. The most popular site has Alexa Rank equals 1. If columbia.edu 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 columbia.edu and pageviews on columbia.edu 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 columbia.edu 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.
"columbia.edu" is not a phishing page.
"columbia.edu" does not install unwanted software.
"columbia.edu" 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 columbia.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 columbia.edu for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the columbia.edu. This reputation system receives ratings from users and information from third-party sources, assesses the columbia.edu for safety features and confirms, whether columbia.edu is suitable for children.
| Domain | columbia.edu |
| Issuer Organization | Internet2 |
| Issuer | InCommon RSA Server CA |
| Algorithm | RSA-SHA256 |
| Valid form | 01/19/2018 |
| Expiration | 01/19/2020 |
| Signed | Certificate is not self signed |
| Additional Domains | columbia.edu *.columbia.edu |
ASN ID: 14
ASN Title: COLUMBIA-GW - Columbia University, US
Last Update: 09/25/2023
#
# 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: 14
ASName: COLUMBIA-GW
ASHandle: AS14
RegDate:
Updated: 2010-06-28
Ref: https://rdap.arin.net/registry/autnum/14
OrgName: Columbia University
OrgId: COLUMB
Address: 612 W 115TH ST
City: NEW YORK
StateProv: NY
PostalCode: 10025
Country: US
RegDate:
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/COLUMB
OrgTechHandle: CU-NOC-ARIN
OrgTechName: Columbia University Computer Operations
OrgTechPhone: +1-212-854-1919
OrgTechEmail: noc@columbia.edu
OrgTechRef: https://rdap.arin.net/registry/entity/CU-NOC-ARIN
OrgAbuseHandle: CUAC-ARIN
OrgAbuseName: COLUMBIA UNIVERSITY ABUSE CONTACT
OrgAbusePhone: +1-212-854-1919
OrgAbuseEmail: abuse@columbia.edu
OrgAbuseRef: https://rdap.arin.net/registry/entity/CUAC-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.
#
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: COLUMBIA.EDU
Registrant:
Columbia University
615 West 131st Street
CUIT - 5th Floor
New York, NY 10027
US
Administrative Contact:
Domain Admin
Columbia University
615 West 131st Street
CUIT - 5th Floor
New York, NY 10027
US
+1.2128541919
noc@columbia.edu
Technical Contact:
Columbia University
615 West 131st Street
CUIT - 5th Floor
New York, NY 10027
US
+1.2128541919
hostmaster@columbia.edu
Name Servers:
AUTH1.DNS.COGENTCO.COM
AUTH5.DNS.COGENTCO.COM
NS1.LSE.AC.UK
AUTH2.DNS.COGENTCO.COM
EXT-NS1.COLUMBIA.EDU
AUTH4.DNS.COGENTCO.COM
DNS2.ITD.UMICH.EDU
Domain record activated: 05-Jul-1985
Domain record last updated: 25-Mar-2021
Domain expires: 31-Jul-2021
| Host | A Record | TTL |
|---|---|---|
| columbia.edu | 128.59.105.24 | 3600 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| columbia.edu | mail-in.cc.l.columbia.edu | 10 | 3600 |
| Host | NS Record | TTL |
|---|---|---|
| columbia.edu | sns-pb.isc.org | 3600 |
| columbia.edu | dns2.itd.umich.edu | 3600 |
| columbia.edu | ns1.lse.ac.uk | 3600 |
| columbia.edu | ext-ns1.columbia.edu | 3600 |
| columbia.edu | sdns1.berkeley.edu | 3600 |
| Host | TXT Record | TTL |
|---|---|---|
| columbia.edu | v=spf1 ip4:128.59.72.0/24 ip4:207.10.139.0/24 ip4:128.59.213.250 ip4:192.5.43.19 ip4:128.59.176.35 ip4:128.59.176.141 ~all | 3600 |
| columbia.edu | google-site-verification=79W02b1NsvPOhVkXxG5gXzAXuxuYquPTXmx_l6KfRok | 3600 |
| columbia.edu | docusign=abbafadf-a495-4889-935f-5fdac37be903 | 3600 |
| columbia.edu | docusign=f8b82e15-b287-46b9-9729-a7436d71c422 | 3600 |
| columbia.edu | adobe-idp-site-verification=c4c82a5f2bf3cc3ee4ad2ee246c28e17ead150faf152556bc9ca5c068762b827 | 3600 |
| columbia.edu | MS=ms88535648 | 3600 |
| columbia.edu | google-site-verification=B93x40FIZF4LI-5cayepjvuwU8ZodIQ09zIDG1gHtIc | 3600 |
| columbia.edu | MS=ms32107722 | 3600 |
ext-ns1.columbia.edu
TTL: 3600
Email address: hostmaster.columbia.edu
Serial: 56441
Refresh: 3600
Retry: 1800
Expire: 2419200
Minimum: 300
Last tested: 06/15/2018
| Total Resources | 91 |
| Number of Hosts | 15 |
| Static Resources | 22 |
| JavaScript Resources | 22 |
| CSS Resources | 5 |
Last tested: 06/12/2016
| Total Resources | 13 |
| Number of Hosts | 4 |
| Static Resources | 9 |
| JavaScript Resources | 4 |
| CSS Resources | 2 |
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