DNSWHOIS.INFO - 221.2.209.in-addr.arpa
Search for IP or hostnames:
221.2.209.in-addr.arpa checked at 2025-10-18T16:29:59.244Z 271ms 55/55/55 100% R:17221.2.209.in-addr.arpa
| NS | ext-ns1.columbia.edu | ||||||
| A | 2001:18d8::35 🇺🇸 Columbia University | ||||||
| PTR | ext-ns1.columbia.edu | ||||||
| A | 2001:18d8:1::1:1 🇺🇸 Columbia University | ||||||
| PTR | ext-ns1.columbia.edu | ||||||
| A | 128.59.1.1🇺🇸 Columbia University | ||||||
| PTR | ext-ns1.columbia.edu | ||||||
| NS | ext-ns2.columbia.edu | ||||||
| A | 2001:18d8::53 🇺🇸 Columbia University | ||||||
| PTR | ext-ns2.columbia.edu | ||||||
| A | 2001:18d8:1:1::1:1 🇺🇸 Columbia University | ||||||
| PTR | ext-ns2.columbia.edu | ||||||
| A | 128.59.1.2🇺🇸 Columbia University | ||||||
| PTR | ext-ns2.columbia.edu | ||||||
2.209.in-addr.arpa
| NS | ns10-auth.windstream.net | ||||||
| NS | ns11-auth.windstream.net | ||||||
| NS | ns12-auth.windstream.net | ||||||
| NS | ns9-auth.windstream.net | ||||||
Starts with same word
221.net |
221.es |
221.co |
221.de |
221.in-addr.arpa |
221.tel |
221.ca |
221.com |
221.ru |
221.la |
221.org |
221.co.uk |
221.money |
221.cz |
221.life |
221.com.ua |
221.us |
221.one |
Starts similarily
AI analysis
221.2.209.in-addr.arpa's delegation uses two name servers: ext-ns1.columbia.edu and ext-ns2.columbia.edu.
221.2.209.in-addr.arpa uses the same name server setup as other domains, such as cyan.college.columbia.edu, dyn.columbia.edu, columbiauniversity.info, gutenberg-e.org and 140.10.207.in-addr.arpa.
221.2.209.in-addr.arpa at least partially shares name servers with other domains, including neuro.columbia.edu, med.columbia.edu, gc.cuny.edu, lagcc.cuny.edu and cunyfirst.cuny.edu.
These name servers are commonly used with apollo.cs.columbia.edu, acme.ucc.cuny.edu, lavinia.cis.cuny.edu, sundog.ee.columbia.edu, ns1.nyp.org, ns2.nyp.org, diana.cs.columbia.edu, ns10.customer.level3.net, ns15.customer.level3.net and auth1.dns.cogentco.com.
Host names with three IP numbers:
The host name ext-ns1.columbia.edu resolves to 2001:18d8::35, 2001:18d8:1::1:1 and 128.59.1.1.
The host name ext-ns2.columbia.edu resolves to 2001:18d8::53, 2001:18d8:1:1::1:1 and 128.59.1.2.