33signals.com - robtex.com
33signals.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 13.248.243.5🇺🇸 Amazon13.248.240.0/20 | ||||||
| PTR | a16e665f42988324c.awsglobalaccelerator.com | ||||||
| A | 76.223.105.230🇺🇸 Amazon76.223.96.0/20 | ||||||
| NS | ns39.domaincontrol.com ⭐ | ||||||
| A | 2603:5:21d1::14🇺🇸 GODADDY-DNS2603:5:21d0::/44 | ||||||
| PTR | ns39.domaincontrol.com | ||||||
| A | 97.74.109.20🇺🇸 GODADDY-DNS97.74.108.0/23 | ||||||
| PTR | ns39.domaincontrol.com | ||||||
| NS | ns40.domaincontrol.com | ||||||
| A | 2603:5:22d1::14🇺🇸 GODADDY-DNS2603:5:22d0::/44 | ||||||
| PTR | ns40.domaincontrol.com | ||||||
| A | 173.201.77.20🇺🇸 GODADDY-DNS173.201.76.0/23 | ||||||
| PTR | ns40.domaincontrol.com | ||||||
| MX | mxa.mailgun.org ⭐ | ||||||
| A | 34.36.182.139🇺🇸 Google34.32.0.0/11 | ||||||
| PTR | 139.182.36.34.bc.googleusercontent.com | ||||||
| MX | mxb.mailgun.org ⭐ | ||||||
| A | 34.36.182.139🇺🇸 Google34.32.0.0/11 | ||||||
| PTR | 139.182.36.34.bc.googleusercontent.com | ||||||
| TXT | v=spf1 include:mailgun.org ~all | ||||||
| SOA | ns39.domaincontrol.comdns@jomax.net 2026-05-12 #2 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1784063347 | ||||||
Same first word
33signals.com |
DNS History
10 records (6 active, 4 former)
●NSns39.domaincontrol.com2026-05-12 → 2026-07-14 · 3 obs
● 2026-05-12 16:59:38
● 2026-07-14 21:21:34
●NSns40.domaincontrol.com2026-05-12 → 2026-07-14 · 3 obs
● 2026-05-12 16:59:38
● 2026-07-14 21:21:34
○NSns6587.hostgator.com2017-05-09 → 2017-05-09 · 3 obs
○ 2026-05-12 16:59:38
○ 2026-07-14 21:21:34
○NSns6588.hostgator.com2017-05-09 → 2017-05-09 · 3 obs
○ 2026-05-12 16:59:38
○ 2026-07-14 21:21:34
○MXmail.33signals.com2017-05-09 → 2017-05-09 · 3 obs
○ 2026-05-12 16:59:38
○ 2026-07-14 21:21:34
●MXmxa.mailgun.org2026-05-13 → 2026-07-14 · 3 obs
● 2026-05-13 08:37:46
● 2026-07-14 21:21:34
●MXmxb.mailgun.org2026-05-13 → 2026-07-14 · 3 obs
● 2026-05-13 08:37:46
● 2026-07-14 21:21:34
●A13.248.243.52026-05-12 → 2026-07-14 · 3 obs
● 2026-05-12 16:59:38
● 2026-07-14 21:21:34
○A162.144.12.302017-05-09 → 2017-05-09 · 3 obs
○ 2026-05-12 16:59:38
○ 2026-07-14 21:21:34
●A76.223.105.2302026-05-12 → 2026-07-14 · 3 obs
● 2026-05-12 16:59:38
● 2026-07-14 21:21:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| 33signals.com | ns39.domaincontrol.com, ns40.domaincontrol.com | 4 records |
✅ Authoritative Response
Server:97.74.109.20
NS records: ns39.domaincontrol.com, ns40.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 33signals.com (unsigned zone)
⏱️ Timing
Total: 732ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 76.223.105.230, 13.248.243.5 |
| NS | 2 | ns39.domaincontrol.com, ns40.domaincontrol.com |
| MX | 2 | mxa.mailgun.org (pri: 60), mxb.mailgun.org (pri: 60) |
| TXT | 1 | v=spf1 include:mailgun.org ~all |
| SOA | 1 | ns39.domaincontrol.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns39.domaincontrol.com, ns39.domaincontrol.com, ns40.domaincontrol.com...)
Analysis
IP Addresses
33signals.com directs to two IP numbers, 13.248.243.5 and 76.223.105.230
Among the host names that share IP numbers with 33signals.com are coveprintinganddesign.com, cooperandcoopercustomclothier.com, rosemarythecelticlady.com and two others.
Name Servers
33signals.com uses two name servers for its delegation: ns39.domaincontrol.com and ns40.domaincontrol.com.
33signals.com has the same name server delegation as a number of other domains, such as randythompsonmusic.com, thefootballbrainiacs.com, zenspa.me and two more.
The two host names ns39.domaincontrol.com and ns40.domaincontrol.com each have a pair of IP addresses: ns39.domaincontrol.com has 97.74.109.20 and 2603:5:21d1::14, and ns40.domaincontrol.com has 173.201.77.20 and 2603:5:22d1::14.
Mail Servers
The MX records for 33signals.com point to two mail servers: mxa.mailgun.org and mxb.mailgun.org.
33signals.com has the same mail server arrangement as a number of other domains, for example carterdeliverysolutions.com, musicat.co, mhwk.nl and two more.
33signals.com shares at least some of its mail servers with other domains — for example ron-excepcional.es, michaliscoffee.co.il, minas-mega.com.br and two more.
It is common to find these mail servers paired with the mail servers aspmx.l.google.com.
mxa.mailgun.org resolves to 34.36.182.139; mxb.mailgun.org resolves to the same IP address, 34.36.182.139.
Both mxa.mailgun.org and mxb.mailgun.org resolve to 34.36.182.139 IP addresses each.