co-tk.com - robtex.com
co-tk.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 133.125.148.20🇯🇵 SAKURA-A133.125.0.0/16 (ISHIKARI) SAKURA Internet // EAST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | ik10009.mixhost.jp | ||||||
| NS | ns1.mixhost.jp ⭐ | ||||||
| A | 162.159.24.192Cloudflare162.159.24.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.mixhost.jp | ||||||
| A | 162.159.25.9Cloudflare162.159.25.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| MX | co-tk.com ⭐ | ||||||
| A | 133.125.148.20🇯🇵 SAKURA-A133.125.0.0/16 (ISHIKARI) SAKURA Internet // EAST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | ik10009.mixhost.jp | ||||||
| TXT | v=spf1 redirect=_spf.mixhost.jp | ||||||
| SOA | ns1.mixhost.jpsystem@mixhost.info 2026-03-09 #1 | ||||||
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 | ||||||
MX for
co-tk.com |
Subdomains
mail.co-tk.com |
Same first word
co-tk.com |
Similar names
k-otc.com |
ok-ct.com |
oct-k.org |
k-otc.net |
tc-ok.com |
tk-co.jp |
kt-co.com |
ok-ct.info |
to-kc.com |
ok-ct.org |
k-toc.de |
k-otc.or.kr |
ok-ct.net |
k-cto.org |
DNS History
9 records (4 active, 5 former)
○NSdkns3.hosting-sys.jp2015-08-17 → 2017-08-20 · 4 obs
● 2017-08-20 21:28:18
○ 2026-02-23 10:33:44
○ 2026-03-23 16:07:06
○NSdkns4.hosting-sys.jp2015-08-17 → 2017-08-20 · 4 obs
● 2017-08-20 21:28:18
○ 2026-02-23 10:33:44
○ 2026-03-23 16:07:06
●NSns1.mixhost.jp2026-02-23 → 2026-03-23 · 3 obs
● 2026-02-23 10:33:44
● 2026-03-23 16:07:06
○NSns1.rocketnet.jp2015-08-17 → 2017-08-20 · 4 obs
● 2017-08-20 21:28:18
○ 2026-02-23 10:33:44
○ 2026-03-23 16:07:06
●NSns2.mixhost.jp2026-02-23 → 2026-03-23 · 3 obs
● 2026-02-23 10:33:44
● 2026-03-23 16:07:06
●MXco-tk.com2026-02-23 → 2026-03-23 · 3 obs
● 2026-02-23 10:33:44
● 2026-03-23 16:07:06
○MXmail.co-tk.com2015-08-17 → 2017-08-20 · 4 obs
● 2017-08-20 21:28:18
○ 2026-02-23 10:33:44
○ 2026-03-23 16:07:06
●A133.125.148.202026-02-23 → 2026-03-23 · 3 obs
● 2026-02-23 10:33:44
● 2026-03-23 16:07:06
○A153.122.9.1142015-08-17 → 2017-08-20 · 4 obs
● 2017-08-20 21:28:18
○ 2026-02-23 10:33:44
○ 2026-03-23 16:07:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| co-tk.com | ns1.mixhost.jp, ns2.mixhost.jp | - |
✅ Authoritative Response
Server:162.159.25.9
NS records: ns1.mixhost.jp, ns2.mixhost.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for co-tk.com (unsigned zone)
⏱️ Timing
Total: 711ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 133.125.148.20 |
| NS | 2 | ns1.mixhost.jp, ns2.mixhost.jp |
| MX | 1 | co-tk.com (pri: 0) |
| TXT | 1 | v=spf1 redirect=_spf.mixhost.jp |
| SOA | 1 | ns1.mixhost.jp system.mixhost.info |
Analysis
Hierarchy
The parent of mail.co-tk.com is co-tk.com.
Mail Server Role
co-tk.com serves as the mail server for co-tk.com.
IP Addresses
co-tk.com points to a single IP number: 133.125.148.20.
Other host names, for instance www.etcen.net, seieki.com, slowhome-diy.com, tsd.clinic and hskg.info share IP numbers with co-tk.com.
Name Servers
co-tk.com is delegated to two name servers: ns1.mixhost.jp and ns2.mixhost.jp.
co-tk.com uses the same name server setup as other domains, for instance nirvana-group.com, kohacraft.com, xccea.com, fujihome-ser.co.jp and kitune-pc.com.
co-tk.com shares name servers with other domains at least partially, for instance ssrv.net, hatakeyama-dental.com, bullitt.jp, ymskk.jp and ayrtonbadovini.com.
these name servers are often used with ns3.mixhost.jp, ns4.mixhost.jp and ns5.mixhost.jp.
Host names with one IP number:
ns1.mixhost.jp points to: 162.159.24.192.
ns2.mixhost.jp points to: 162.159.25.9.
Mail Servers
A single mail server handles co-tk.com and co-tk.com.
Host name co-tk.com resolves to IP 133.125.148.20.