zdtco.com - robtex.com
zdtco.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 58.251.167.186🇨🇳 CNCGROUP-SZ58.251.167.0/24 CMI (Customer Route) | ||||||
| PTR | maill.zdtco.com | ||||||
| NS | tyvmzdtdns ⭐ ⚠️ Not in parent delegation | ||||||
| NS | ns01.zdtco.com ⚠️ Not in zone NS records | ||||||
| NS | ns02.zdtco.com ⚠️ Not in zone NS records | ||||||
| NS | ns03.zdtco.com ⚠️ Not in zone NS records | ||||||
| MX | exspam01.zdtco.com ⭐ | ||||||
| A | 211.75.231.197🇹🇼 HiNet211.75.0.0/16 (HiNet) Chunghwa Telecom Co., Ltd. Data Communication Business Group 21, Section 1, Hsin-Yi Road, Taipei Taiwan R.O.C. | ||||||
| PTR | kavmspamsrv01.braiics.com | ||||||
| MX | exspam02.zdtco.com(2) | ||||||
| A | 61.221.129.54🇹🇼 HiNet61.221.0.0/16 (HiNet) Chunghwa Telecom Co., Ltd. | ||||||
| PTR | braiics.com | ||||||
| PTR | zdtco.com | ||||||
| TXT | m1v28zhm3nt70mhyvms0n5xyyc2nwlg4 | ||||||
| TXT | VGUJwrGBAFWArVy41_mDjBUT6lzmmGwoF0MxqNOrecg | ||||||
| TXT | v=DMARC1; p=quarantine; pct=100; rua=mailto:it-l-s@zdtco.com; ruf=mailto:it-l... | ||||||
| TXT | hFWgNUdJIjYICFBwBVd-5Dy-83CO5ZZRc4GwCHRQeKo | ||||||
| TXT | v=spf1 include:_spf.zdtco.com ~all | ||||||
| SOA | tyvmzdtdnshostmaster serial=183 | ||||||
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=1775997812 | ||||||
PTR for
Subdomains
exspam02.zdtco.com |
mail.zdtco.com |
ns.zdtco.com |
mail2.zdtco.com |
ns2.zdtco.com |
mail1.zdtco.com |
exspam01.zdtco.com |
www.zdtco.com |
Same first word
zdtco.com |
Similar names
DNS History
11 records (7 active, 4 former)
○NSns.zdtco.com2015-08-01 → 2017-02-06 · 4 obs
● 2017-02-06 21:38:06
○ 2026-02-19 18:57:22
○ 2026-04-12 13:10:32
●NSns01.zdtco.com2026-02-19 → 2026-04-12 · 3 obs
● 2026-02-19 18:57:22
● 2026-04-12 13:10:32
●NSns02.zdtco.com2026-02-19 → 2026-04-12 · 3 obs
● 2026-02-19 18:57:22
● 2026-04-12 13:10:32
●NSns03.zdtco.com2026-02-19 → 2026-04-12 · 3 obs
● 2026-02-19 18:57:22
● 2026-04-12 13:10:32
○NSns2.zdtco.com2015-08-01 → 2017-02-06 · 4 obs
● 2017-02-06 21:38:06
○ 2026-02-19 18:57:22
○ 2026-04-12 13:10:32
●NStyvmzdtdns2026-02-19 → 2026-04-12 · 3 obs
● 2026-02-19 18:57:22
● 2026-04-12 13:10:32
●MXexspam01.zdtco.com2026-02-19 → 2026-04-12 · 3 obs
● 2026-02-19 18:57:22
● 2026-04-12 13:10:32
●MXexspam02.zdtco.com2026-02-19 → 2026-04-12 · 3 obs
● 2026-02-19 18:57:22
● 2026-04-12 13:10:32
○MXmail1.zdtco.com2015-08-01 → 2017-02-06 · 4 obs
● 2017-02-06 21:38:06
○ 2026-02-19 18:57:22
○ 2026-04-12 13:10:32
○MXmail2.zdtco.com2015-08-01 → 2017-02-06 · 4 obs
● 2017-02-06 21:38:06
○ 2026-02-19 18:57:22
○ 2026-04-12 13:10:32
●A58.251.167.1862015-08-01 → 2026-04-12 · 2 obs
● 2026-04-12 13:10:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| zdtco.com | ns01.zdtco.com, ns02.zdtco.com, ns03.zdtco.com | 3 records |
✅ Authoritative Response
Server:210.63.216.26
NS records: ns01.zdtco.com, ns02.zdtco.com, ns03.zdtco.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for zdtco.com (unsigned zone)
⏱️ Timing
Total: 530ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 58.251.167.186 |
| NS | 1 | tyvmzdtdns |
| MX | 2 | exspam02.zdtco.com (pri: 2), exspam01.zdtco.com (pri: 1) |
| TXT | 5 | v=spf1 include:_spf.zdtco.com ~all, m1v28zhm3nt70mhyvms0n5xyyc2nwlg4... |
| SOA | 1 | tyvmzdtdns hostmaster |
📌 Glue Records Collected
Total: 3
In-bailiwick: 3 (ns01.zdtco.com, ns02.zdtco.com, ns03.zdtco.com)
Analysis
Hierarchy
zdtco.com is a parent of exspam02.zdtco.com, mail.zdtco.com, ns.zdtco.com, mail2.zdtco.com, ns2.zdtco.com and a few other host names.
IP Addresses
zdtco.com points to IP number: 58.251.167.186.
Other host names, for instance mail1.zdtco.com share IP numbers with zdtco.com.
Name Servers
zdtco.com is delegated to four name servers: tyvmzdtdns, ns01.zdtco.com, ns02.zdtco.com and ns03.zdtco.com.
Mail Servers
zdtco.com is handled by two mail servers: exspam01.zdtco.com and exspam02.zdtco.com.
Host names with a single IP:
exspam01.zdtco.com points to 211.75.231.197.
exspam02.zdtco.com points to 61.221.129.54.