3b1b.co - robtex.com
3b1b.co
co
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.registrydns.co | ||||||
| NS | b.registrydns.co | ||||||
| NS | c.registrydns.co | ||||||
| NS | d.registrydns.co | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=1759656778 | ||||||
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●NSns-cloud-b1.googledomains.com2026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
●NSns-cloud-b2.googledomains.com2026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
●NSns-cloud-b3.googledomains.com2026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
●NSns-cloud-b4.googledomains.com2026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
●MXmxa.mailgun.org2026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
●MXmxb.mailgun.org2026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
●A75.2.60.52026-04-01 → 2026-05-13 · 2 obs
● 2026-05-13 05:30:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co | - |
| 3b1b.co | ns-cloud-b3.googledomains.com, ns-cloud-b4.googledomains.com, ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com | - |
✅ Authoritative Response
Server:216.239.34.107
NS records: ns-cloud-b3.googledomains.com, ns-cloud-b4.googledomains.com, ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1369ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 75.2.60.5 |
| NS | 4 | ns-cloud-b1.googledomains.com, ns-cloud-b4.googledomains.com... |
| MX | 2 | mxb.mailgun.org (pri: 10), mxa.mailgun.org (pri: 10) |
| TXT | 1 | v=spf1 include:mailgun.org ~all |
| SOA | 1 | ns-cloud-b1.googledomains.com cloud-dns- |
Analysis
IP Addresses
3b1b.co resolves to a single IP: 75.2.60.5.
Other host names, for instance belcrop.com, condorapartments.com.au, autoclick.pro, cbcoaching.ch and sdltcheck.co.uk share IP numbers with 3b1b.co.
Name Servers
3b1b.co is delegated to four name servers: ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com and ns-cloud-b4.googledomains.com.
3b1b.co shares some name servers with other domains, for example cortepreziosa.com, skilpad.org, software-clicks.com, andybrittain.com and jasondowning.com.
Host names with two IP numbers
Two IPs per host:
ns-cloud-b1.googledomains.com points to 2001:4860:4802:32::6b and 216.239.32.107
ns-cloud-b2.googledomains.com points to 2001:4860:4802:34::6b and 216.239.34.107
ns-cloud-b3.googledomains.com points to 2001:4860:4802:36::6b and 216.239.36.107
ns-cloud-b4.googledomains.com points to 2001:4860:4802:38::6b and 216.239.38.107
Mail Servers
3b1b.co is served by two mail servers: mxa.mailgun.org and mxb.mailgun.org.
3b1b.co shares the mail server setup with other domains, for example vitastaa.camp, app.pipelinecrm.com, software-carpentry.org, ctf.0xfun.org and eduortho.ca.
3b1b.co shares some mail servers with other domains, at least partially; for instance sabuco-clarke.com, getsirena.com, dailywire.com, globophone.net and wdc65xx.com.
these mail servers are commonly used alongside aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
Host names with one IP number:
mxa.mailgun.org points to: 34.149.254.5
mxb.mailgun.org points to: 34.149.254.5
Names pointing to 34.149.254.5: mxa.mailgun.org and mxb.mailgun.org