calculus.org - dns.ninja
calculus.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 169.237.99.135🇺🇸 UCDavis169.237.0.0/16 University of California, Davis Davis, CA 95616 USA | ||||||
| NS | ns1.math.ucdavis.edu ⭐ | ||||||
| A | 169.237.99.3🇺🇸 UCDavis169.237.0.0/16 University of California, Davis Davis, CA 95616 USA | ||||||
| PTR | ns1.math.ucdavis.edu | ||||||
| NS | ns2.math.ucdavis.edu | ||||||
| A | 169.237.99.4🇺🇸 UCDavis169.237.0.0/16 University of California, Davis Davis, CA 95616 USA | ||||||
| PTR | ns2.math.ucdavis.edu | ||||||
| MX | mx1.math.ucdavis.edu ⭐ | ||||||
| A | 169.237.99.76🇺🇸 UCDavis169.237.0.0/16 University of California, Davis Davis, CA 95616 USA | ||||||
| TXT | v=spf1 mx a:mail.math.ucdavis.edu a:slope.math.ucdavis.edu a:step.math.ucdavi... | ||||||
| SOA | ns1.math.ucdavis.eduhostmaster@math.ucdavis.edu 2026-07-26 #2 | ||||||
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=1785121767 | ||||||
rank #67877 in the tld
WOT: SAFE (79/100)
Subdomains
www.calculus.org |
Same first word
Similar names
DNS History
8 records (4 active, 4 former)
○NSns1.cse.ucdavis.edu2015-08-10 → 2020-03-11 · 4 obs
● 2020-03-11 09:54:46
○ 2026-02-18 08:02:22
○ 2026-07-27 03:33:58
●NSns1.math.ucdavis.edu2015-08-10 → 2026-07-27 · 2 obs
● 2026-07-27 03:33:58
●NSns2.math.ucdavis.edu2015-08-10 → 2026-07-27 · 2 obs
● 2026-07-27 03:33:58
○MXmean.math.ucdavis.edu2015-08-10 → 2015-12-13 · 4 obs
● 2015-12-13 15:21:06
○ 2016-03-17 13:19:12
○ 2026-07-27 03:33:58
●MXmx1.math.ucdavis.edu2016-03-17 → 2026-07-27 · 13 obs
● 2016-03-17 13:19:12
● 2020-03-11 09:54:46
○ 2026-02-18 08:02:22
● 2026-04-12 02:03:52
○ 2026-04-17 04:06:04
● 2026-04-18 03:46:08
● 2026-05-16 12:49:54
○ 2026-06-13 08:59:08
● 2026-06-23 04:24:46
○ 2026-07-13 14:37:30
● 2026-07-27 03:33:54
● 2026-07-27 03:33:58
○A169.237.30.42015-08-10 → 2016-03-17 · 4 obs
● 2016-03-17 13:19:12
○ 2016-07-22 12:22:48
○ 2026-07-27 03:33:58
●A169.237.99.1352026-02-18 → 2026-07-27 · 11 obs
● 2026-02-18 08:02:22
● 2026-04-12 02:03:52
○ 2026-04-17 04:06:04
○ 2026-05-04 22:54:16
● 2026-05-16 12:49:54
○ 2026-06-13 08:59:08
● 2026-06-23 04:24:46
○ 2026-07-13 14:37:30
● 2026-07-27 03:33:54
● 2026-07-27 03:33:58
○A169.237.99.952016-07-22 → 2020-03-11 · 5 obs
● 2016-07-22 12:22:48
● 2020-03-11 09:54:46
○ 2026-02-18 08:02:22
○ 2026-07-27 03:33:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| calculus.org | ns1.math.ucdavis.edu, ns2.math.ucdavis.edu | - |
✅ Authoritative Response
Server:169.237.99.4
NS records: ns1.math.ucdavis.edu, ns2.math.ucdavis.edu
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for calculus.org (unsigned zone)
⏱️ Timing
Total: 534ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.math.ucdavis.edu, ns2.math.ucdavis.edu |
| TXT | 1 | v=spf1 mx a:mail.math.ucdavis.edu a:slop |
| SOA | 1 | ns1.math.ucdavis.edu hostmaster.math.ucd |
Analysis
Hierarchy
calculus.org serves as the parent of www.calculus.org.
IP Addresses
calculus.org resolves to just one IP address, 169.237.99.135.
Additional host names — including www.calculus.org and ipa2.math.ucdavis.edu — share IP numbers with calculus.org.
Name Servers
calculus.org is delegated to two name servers: ns1.math.ucdavis.edu and ns2.math.ucdavis.edu.
calculus.org shares its name server setup with other domains, such as math.ucdavis.edu.
calculus.org has at least partial name server overlap with other domains, such as 99.237.169.in-addr.arpa, 31.237.169.in-addr.arpa, itd.ucdavis.edu and two others.
It is common to see these name servers used together with name servers ns1.cse.ucdavis.edu and naniloa.cse.ucdavis.edu.
ns1.math.ucdavis.edu directs to 169.237.99.3 and ns2.math.ucdavis.edu directs to 169.237.99.4; each host name points to exactly one IP number.
Mail Servers
The sole mail server for calculus.org is mx1.math.ucdavis.edu.
Mail server setup for calculus.org matches that of other domains, among them math.ucdavis.edu.
mx1.math.ucdavis.edu resolves to a single IP number: 169.237.99.76.