4co.us - robtex.com
4co.us
us
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.cctld.us ⭐ | ||||||
| NS | b.cctld.us | ||||||
| NS | f.cctld.us | ||||||
| NS | k.cctld.us | ||||||
| NS | m.cctld.us | ||||||
| NS | n.cctld.us | ||||||
| NS | w.cctld.us | ||||||
| NS | x.cctld.us | ||||||
| NS | y.cctld.us | ||||||
| SOA | a.cctld.usadmin@tldns.godaddy serial=1786075211 | ||||||
Same first word
4co.nl |
4co.in |
4co.ai |
4co.com.cn |
4co.net |
4co.com |
4co.us |
4co.dk |
4co.eu |
4co.tw |
4co.jp |
4co.uk |
4co.cc |
4co.me |
4co.de |
4co.co |
Similar names
DNS History
10 records (5 active, 5 former)
○NShidden-master.yahoo.com2015-06-30 → 2016-11-26 · 4 obs
● 2016-11-26 16:15:28
○ 2026-08-01 16:30:54
○ 2026-08-07 04:22:58
●NSns37.domaincontrol.com2026-08-01 → 2026-08-07 · 3 obs
● 2026-08-01 16:30:54
● 2026-08-07 04:22:58
●NSns38.domaincontrol.com2026-08-01 → 2026-08-07 · 3 obs
● 2026-08-01 16:30:54
● 2026-08-07 04:22:58
○NSyns1.yahoo.com2015-06-30 → 2016-11-26 · 4 obs
● 2016-11-26 16:15:28
○ 2026-08-01 16:30:54
○ 2026-08-07 04:22:58
○NSyns2.yahoo.com2015-06-30 → 2016-11-26 · 4 obs
● 2016-11-26 16:15:28
○ 2026-08-01 16:30:54
○ 2026-08-07 04:22:58
●MX4co-us.mail.protection.outlook.com2026-08-01 → 2026-08-07 · 3 obs
● 2026-08-01 16:30:54
● 2026-08-07 04:22:58
○MXmx-biz.mail.am0.yahoodns.net2015-06-30 → 2016-11-26 · 4 obs
● 2016-11-26 16:15:28
○ 2026-08-01 16:30:54
○ 2026-08-07 04:22:58
●A13.248.243.52026-08-01 → 2026-08-07 · 3 obs
● 2026-08-01 16:30:54
● 2026-08-07 04:22:58
●A76.223.105.2302026-08-01 → 2026-08-07 · 3 obs
● 2026-08-01 16:30:54
● 2026-08-07 04:22:58
○A98.138.19.1432015-06-30 → 2016-11-26 · 4 obs
● 2016-11-26 16:15:28
○ 2026-08-01 16:30:54
○ 2026-08-07 04:22:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| us | m.cctld.us, k.cctld.us, b.cctld.us, x.cctld.us... | - |
| 4co.us | ns38.domaincontrol.com, ns37.domaincontrol.com | - |
✅ Authoritative Response
Server:173.201.76.19
NS records: ns38.domaincontrol.com, ns37.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 4co.us (unsigned zone)
⏱️ Timing
Total: 593ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 76.223.105.230, 13.248.243.5 |
| NS | 2 | ns38.domaincontrol.com, ns37.domaincontrol.com |
| MX | 1 | 4co-us.mail.protection.outlook.com (pri: |
| TXT | 2 | NETORGFT20897400.onmicrosoft.com, v=spf1 include:secureserver.net -all |
| SOA | 1 | ns37.domaincontrol.com dns.jomax.net |
Analysis
IP Addresses
4co.us points to the IP addresses 13.248.243.5 and 76.223.105.230
pxdgroup.com, bebravent.ai, khidra.com and two other host names share IP numbers with 4co.us.
Name Servers
Two name servers handle the delegation for 4co.us: ns37.domaincontrol.com and ns38.domaincontrol.com.
4co.us uses the same name servers as several other domains — among them veronanj.com, fabmet.com, hcfree.com and two more.
The name servers for 4co.us overlap at least in part with those of other domains, including 4tsconference.com and verhaw.com.
ns37.domaincontrol.com and ns38.domaincontrol.com both carry two IP addresses. The A records for ns37.domaincontrol.com are 97.74.108.19 and 2603:5:21c1::13; the A records for ns38.domaincontrol.com are 173.201.76.19 and 2603:5:22c1::13.
Mail Servers
Mail for 4co.us is handled by a single mail server, 4co-us.mail.protection.outlook.com.
4co-us.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.91.0, 52.101.91.1, 52.101.91.2 and 5 others.