theoryofcomputing.org - dns.ninja
theoryofcomputing.org
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1786351841 | ||||||
rank #51177 in the tld
WOT: SAFE (90/100)
Subdomains
www.theoryofcomputing.org |
Same first word
theoryofcomputing.com |
theoryofcomputing.net |
theoryofcomputing.org |
DNS History
11 records (5 active, 6 former)
○NSdns1.name-services.com2015-07-07 → 2017-03-21 · 4 obs
● 2017-03-21 14:58:16
○ 2020-02-16 22:23:46
○ 2026-08-10 09:00:32
○NSdns2.name-services.com2015-07-07 → 2017-03-21 · 4 obs
● 2017-03-21 14:58:16
○ 2020-02-16 22:23:46
○ 2026-08-10 09:00:32
○NSdns3.name-services.com2015-07-07 → 2017-03-21 · 4 obs
● 2017-03-21 14:58:16
○ 2020-02-16 22:23:46
○ 2026-08-10 09:00:32
○NSdns4.name-services.com2015-07-07 → 2017-03-21 · 4 obs
● 2017-03-21 14:58:16
○ 2020-02-16 22:23:46
○ 2026-08-10 09:00:32
○NSdns5.name-services.com2015-07-07 → 2017-03-21 · 4 obs
● 2017-03-21 14:58:16
○ 2020-02-16 22:23:46
○ 2026-08-10 09:00:32
●NSns1.active-dns.com2020-02-16 → 2026-08-10 · 3 obs
● 2020-02-16 22:23:46
● 2026-08-10 09:00:32
●NSns2.active-dns.com2020-02-16 → 2026-08-10 · 3 obs
● 2020-02-16 22:23:46
● 2026-08-10 09:00:32
●NSns3.active-dns.com2020-02-16 → 2026-08-10 · 3 obs
● 2020-02-16 22:23:46
● 2026-08-10 09:00:32
●NSns4.active-dns.com2020-02-16 → 2026-08-10 · 3 obs
● 2020-02-16 22:23:46
● 2026-08-10 09:00:32
●A128.135.164.1142020-02-16 → 2026-08-10 · 3 obs
● 2020-02-16 22:23:46
● 2026-08-10 09:00:32
○A128.135.164.382015-07-07 → 2017-03-21 · 4 obs
● 2017-03-21 14:58:16
○ 2020-02-16 22:23:46
○ 2026-08-10 09:00:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| theoryofcomputing.org | ns4.active-dns.com, ns2.active-dns.com, ns1.active-dns.com, ns3.active-dns.com | - |
✅ Authoritative Response
Server:162.251.82.125
NS records: ns4.active-dns.com, ns2.active-dns.com, ns1.active-dns.com, ns3.active-dns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for theoryofcomputing.org (unsigned zone)
⏱️ Timing
Total: 490ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 128.135.164.114 |
| NS | 4 | ns2.active-dns.com, ns4.active-dns.com... |
| SOA | 1 | ns4.active-dns.com toc.cs.uchicago.edu |
Analysis
Hierarchy
theoryofcomputing.org serves as the parent of www.theoryofcomputing.org.
IP Addresses
theoryofcomputing.org has exactly one IP address — 128.135.164.114.
Additional host names — including zesty.cs.uchicago.edu and www.theoryofcomputing.org — share IP numbers with theoryofcomputing.org.
Name Servers
Four name servers handle the delegation for theoryofcomputing.org: ns1.active-dns.com, ns2.active-dns.com, ns3.active-dns.com and ns4.active-dns.com.
theoryofcomputing.org has at least partial name server overlap with other domains, such as reginn.net, harves.net, donsgd.biz and two others.
It is common to find these name servers paired with the name servers 208.91.197.91.
Each hostname ns1.active-dns.com, ns2.active-dns.com, ns3.active-dns.com and ns4.active-dns.com has four IP addresses: ns1.active-dns.com has 162.251.82.122, 162.251.82.123, 162.251.82.250 and 162.251.82.251; ns2.active-dns.com has 162.251.82.120, 162.251.82.121, 162.251.82.248 and 162.251.82.249; ns3.active-dns.com has 162.251.82.118, 162.251.82.119, 162.251.82.246 and 162.251.82.247; ns4.active-dns.com has 162.251.82.124, 162.251.82.125, 162.251.82.252 and 162.251.82.253.