colo21.com - robtex.com
colo21.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 154.195.71.137🇺🇸 GNET-AS9294154.195.64.0/20 | ||||||
| NS | ns1.julydns.com ⭐ | ||||||
| A | 47.97.51.45🇨🇳 Alibaba-Cloud47.96.0.0/15 Aliyun Computing Co., LTD | ||||||
| PTR | ip-47-97-51-45.defastlink.net | ||||||
| NS | ns2.julydns.com | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ip-162-159-48-223.defastlink.net | ||||||
| SOA | ns1.julydns.commaster@jmdns.com serial=1772053071 | ||||||
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=1771291435 | ||||||
Subdomains
www.colo21.com |
Same first word
colo21.com |
Similar names
DNS History
11 records (3 active, 8 former)
○NSdocks06.rzone.de2015-05-15 → 2017-05-28 · 3 obs
● 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
●NSns1.julydns.com2026-03-08 → 2026-03-08 · 2 obs
● 2026-03-08 01:17:30
●NSns2.julydns.com2026-03-08 → 2026-03-08 · 2 obs
● 2026-03-08 01:17:30
○NSshades11.rzone.de2015-05-15 → 2017-05-28 · 3 obs
● 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
○MXinbound-smtp.eu-west-1.amazonaws.com2017-05-28 → 2017-05-28 · 3 obs
● 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
○MXrelay.rzone.de2017-05-28 → 2017-05-28 · 3 obs
● 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
○MXsmtpin.rzone.de2015-05-15 → 2017-03-29 · 4 obs
● 2017-03-29 21:58:08
○ 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
●A154.195.71.1372026-03-08 → 2026-03-08 · 2 obs
● 2026-03-08 01:17:30
○A156.247.113.442026-03-08 → 2026-03-08 · 1 obs
○A2a01:238:20a:202:1084::2015-05-15 → 2017-05-28 · 3 obs
● 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
○A81.169.145.842015-05-15 → 2017-05-28 · 3 obs
● 2017-05-28 08:41:48
○ 2026-03-08 01:17:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| colo21.com | ns1.julydns.com, ns2.julydns.com | 2 records |
✅ Authoritative Response
Server: 162.159.48.223
NS records: ns1.julydns.com, ns2.julydns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for colo21.com (unsigned zone)
⏱️ Timing
Total: 338ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 154.195.71.137 |
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
| SOA | 1 | ns1.julydns.com master.jmdns.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.julydns.com, ns2.julydns.com)
Analysis
Hierarchy
The parent of www.colo21.com is colo21.com.
IP Addresses
colo21.com points to IP number: 154.195.71.137.
Name Servers
colo21.com is delegated to two name servers: ns1.julydns.com and ns2.julydns.com.
colo21.com shares the same name server setup as csdex.com, hbjfwy.com, caishenyevip.com, hbtsblg.com and wm958.com.
colo21.com at least partially shares name servers with other domains, for instance wpbo.cn, hzcyjk.com, vxwcpsl.cn, kxbp.cn and trcycs.cn.
These name servers are commonly used with ns1.judns.com and ns2.judns.com.
Host names with a single IP:
ns1.julydns.com points to 47.97.51.45.
ns2.julydns.com points to 162.159.48.223.