rctdk.com - robtex.com
rctdk.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 220.228.131.168🇹🇼 NCIC-TW220.228.131.0/24 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | ll-220-228-131-168.ll.sparqnet.net | ||||||
| NS | dns1.f1.com.tw ⭐ ⚠️ Not in parent delegation | ||||||
| A | 218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp234.f1.com.tw | ||||||
| NS | dns2.f1.com.tw ⚠️ Not in parent delegation | ||||||
| A | 220.228.6.17🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| NS | ns1.icstock.com.tw ⚠️ Not in zone NS records | ||||||
| A | 218.32.213.228🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp228.f1.com.tw | ||||||
| NS | ns2.icstock.com.tw ⚠️ Not in zone NS records | ||||||
| A | 218.32.210.72🇹🇼 NCIC-TW218.32.210.0/24 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp72.f1.com.tw | ||||||
| NS | sp234.f1.com.tw ⚠️ Not in zone NS records | ||||||
| A | 218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp234.f1.com.tw | ||||||
| MX | rctdk.com ⭐ | ||||||
| A | 220.228.131.168🇹🇼 NCIC-TW220.228.131.0/24 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | ll-220-228-131-168.ll.sparqnet.net | ||||||
| MX | www.rctdk.com(14) | ||||||
| A | 220.228.131.168🇹🇼 NCIC-TW220.228.131.0/24 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | ll-220-228-131-168.ll.sparqnet.net | ||||||
| SOA | dns1.f1.com.twohgo@ms23.hinet.net 2000-11-01 #8 | ||||||
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=1774566047 | ||||||
MX for
rctdk.com |
Same first word
rctdk.com |
Similar names
tckrd.com |
dtrck.com |
ckrdt.org |
dctrk.com |
kctrd.com |
rdctk.cn |
cdtkr.ru |
kdtrc.cn |
dtkcr.com |
trckd.click |
trckd.net |
rtcdk.com |
tkrcd.org.tr |
kdctr.com |
cdkrt.com |
trkdc.com |
dtrck.net |
cdrkt.com |
DNS History
11 records (8 active, 3 former)
●NSdns1.f1.com.tw2026-03-22 → 2026-03-26 · 3 obs
● 2026-03-22 12:38:48
● 2026-03-26 23:30:52
●NSdns2.f1.com.tw2026-03-22 → 2026-03-26 · 3 obs
● 2026-03-22 12:38:48
● 2026-03-26 23:30:52
○NSf1g1ns1.dnspod.net2016-12-15 → 2016-12-15 · 3 obs
○ 2017-12-06 13:46:00
○ 2026-03-26 23:30:52
○NSf1g1ns2.dnspod.net2016-12-15 → 2016-12-15 · 3 obs
○ 2017-12-06 13:46:00
○ 2026-03-26 23:30:52
●NSns1.icstock.com.tw2026-03-22 → 2026-03-26 · 3 obs
● 2026-03-22 12:38:48
● 2026-03-26 23:30:52
●NSns2.icstock.com.tw2026-03-22 → 2026-03-26 · 3 obs
● 2026-03-22 12:38:48
● 2026-03-26 23:30:52
●NSsp234.f1.com.tw2026-03-22 → 2026-03-26 · 3 obs
● 2026-03-22 12:38:48
● 2026-03-26 23:30:52
●MXrctdk.com2026-03-22 → 2026-03-26 · 2 obs
● 2026-03-26 23:30:52
●MXwww.rctdk.com2026-03-22 → 2026-03-26 · 2 obs
● 2026-03-26 23:30:52
○A173.247.239.1482016-12-15 → 2016-12-15 · 3 obs
○ 2017-12-06 13:46:00
○ 2026-03-26 23:30:52
●A220.228.131.1682026-03-22 → 2026-03-26 · 3 obs
● 2026-03-22 12:38:48
● 2026-03-26 23:30:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | e.gtld-servers.net, b.gtld-servers.net, g.gtld-servers.net, j.gtld-servers.net... | - |
| rctdk.com | ns1.icstock.com.tw, ns2.icstock.com.tw, sp234.f1.com.tw | - |
✅ Authoritative Response
Server:218.32.213.228
NS records: ns1.icstock.com.tw, ns2.icstock.com.tw, sp234.f1.com.tw
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rctdk.com (unsigned zone)
⏱️ Timing
Total: 1419ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 220.228.131.168 |
| NS | 2 | dns1.f1.com.tw, dns2.f1.com.tw |
| MX | 2 | www.rctdk.com (pri: 14), rctdk.com (pri: 10) |
| SOA | 1 | dns1.f1.com.tw ohgo.ms23.hinet.net |
Analysis
Mail Server Role
rctdk.com is the mail server for rctdk.com.
Together with rctdk.com, www.rctdk.com is commonly used as a mail server.
IP Addresses
rctdk.com resolves to a single IP: 220.228.131.168.
Other host names, for instance mail.e4er.com, www.1nvp.com, www.6hj8.com, www.rctdoc.com and u676.com share IP numbers with rctdk.com.
Name Servers
rctdk.com delegates to five name servers: dns1.f1.com.tw, dns2.f1.com.tw, sp234.f1.com.tw, ns1.icstock.com.tw and ns2.icstock.com.tw.
rctdk.com shares some name servers with other domains, for example ad22.info, (0x736578)y657.com, 1007-miss.com, love964.com and fastauto.com.tw.
These name servers are often used together with ns1.oknet.tw, ns2.oknet.tw and sf243.f1.com.tw.
Host names with one IP number:
Hostname dns1.f1.com.tw points to 218.32.213.234
Hostname dns2.f1.com.tw points to 220.228.6.17
Hostname sp234.f1.com.tw points to 218.32.213.234
Hostname ns1.icstock.com.tw points to 218.32.213.228
Hostname ns2.icstock.com.tw points to 218.32.210.72
Hostnames pointing to 218.32.213.234: dns1.f1.com.tw and sp234.f1.com.tw
Mail Servers
rctdk.com is handled by two mail servers: rctdk.com and www.rctdk.com.
Host names with one IP number:
rctdk.com points to: 220.228.131.168
www.rctdk.com points to: 220.228.131.168
Names pointing to 220.228.131.168: rctdk.com and www.rctdk.com