CF1764276315696-tsm20251127171005

RTSAK.COM - ext-ns1.columbia.edu

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ext-ns1.columbia.edu checked at 2025-11-27T20:45:15.675Z 242ms 35/35/35 100% R:13 allDone:true timedOut:false

ext-ns1.columbia.edu

A128.59.1.1🇺🇸 Columbia University
PTRext-ns1.columbia.edu

columbia.edu

NSext-ns1.columbia.edu
NSauth1.dns.cogentco.com
NSauth2.dns.cogentco.com
MXmxa-00364e01.gslb.pphosted.com
MXmxb-00364e01.gslb.pphosted.com
NSns1.lse.ac.uk
A162.159.128.65 Cloudflare
A162.159.138.64 Cloudflare
rank #271 globally
rank #9 in the tld
This domain name "columbia.edu" is associated with Columbia University, a private Ivy League research university located in New York City. It is used for the university's main website, email addresses, and various online services related to the institution. The ".edu" extension indicates that the domain is primarily used for educational institutions.

PTR for

1.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.8.d.8.1.1.0.0.2.ip6.arpa
5.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.d.8.1.1.0.0.2.ip6.arpa
1.1.59.128.in-addr.arpa

NS for

cs.columbia.edu
c2b2.columbia.edu
43.5.192.in-addr.arpa
171.111.156.in-addr.arpa
jazzstudiesonline.org
osr.columbia.edu
iri.columbia.edu
dmi.columbia.edu
145.111.156.in-addr.arpa
20.59.128.in-addr.arpa
baruch.cuny.edu
macaulay.cuny.edu
comet.columbia.edu
204.145.156.in-addr.arpa
119.111.146.in-addr.arpa
ccc.columbia.edu
pulitzer.org
substanceabuse.columbia.edu
10.59.128.in-addr.arpa
120.111.146.in-addr.arpa
med.cuny.edu
columbiauniversity.us
healthsciences.columbia.edu
teacherscollege.edu
dodgefitnesscenter.com
mc.cumc.columbia.edu
191.59.128.in-addr.arpa
york.cuny.edu
228.128.in-addr.arpa
252.236.129.in-addr.arpa
cubhis.columbia.edu
9.59.128.in-addr.arpa
wcbn.org
95.146.in-addr.arpa
236.129.in-addr.arpa
cuf.columbia.edu
191.236.129.in-addr.arpa
5.59.128.in-addr.arpa
secure.barnard.edu
csi.cuny.edu
guttman.cuny.edu
clic.cs.columbia.edu
mdm.cumc.columbia.edu
18.59.128.in-addr.arpa
sps.cuny.edu
117.111.146.in-addr.arpa
slu.cuny.edu
cpmc.columbia.edu
lip.cuny.edu
art.columbia.edu
systemsbiology.columbia.edu
resnet.barnard.edu
p-i-r.org
97.104.143.in-addr.arpa
ncl.cs.columbia.edu
mailman.columbia.edu
millertheater.com
139.111.146.in-addr.arpa
citytech.cuny.edu
medicine.cuny.edu
64.59.128.in-addr.arpa
irvinginstitute.columbia.edu
stemcell.columbia.edu
adcu.columbia.edu
162.236.129.in-addr.arpa
millertheatre.com
gsb.columbia.edu
96.146.in-addr.arpa
eoc.cuny.edu
central.cuny.edu
columbia.edu
dbmi.columbia.edu
166.236.129.in-addr.arpa
barnard.edu
cuimc.columbia.edu
lc.cuny.edu
cumc.columbia.edu
255.236.129.in-addr.arpa
ctr.columbia.edu
tc.edu
iccr.columbia.edu
19.59.128.in-addr.arpa
ps.columbia.edu
uapc.cuny.edu
guest.barnard.edu
beoc.cuny.edu
wds.cumc.columbia.edu
158.111.146.in-addr.arpa
cuny.edu
65.59.128.in-addr.arpa
ee.columbia.edu
acs.cuny.edu
hs.columbia.edu
219.2.209.in-addr.arpa
icap.or.tz
teal.college.columbia.edu
135.111.146.in-addr.arpa
orl.columbia.edu
hhmi.columbia.edu
sipa.columbia.edu

AI analysis

ext-ns1.columbia.edu serves as a name server for cs.columbia.edu, c2b2.columbia.edu, 43.5.192.in-addr.arpa, 171.111.156.in-addr.arpa, jazzstudiesonline.org and hundreds of other domains.

Common name servers include ext-ns2.columbia.edu, ns1.nyp.org and ns2.nyp.org, used together with ext-ns1.columbia.edu.

ext-ns1.columbia.edu resolves to a single IP: 128.59.1.1.

Other host names share IP numbers with ext-ns1.columbia.edu; for instance saell.cc.columbia.edu.