simplex.co - dns.ninja
simplex.co
co
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.registrydns.co | ||||||
| NS | b.registrydns.co | ||||||
| NS | c.registrydns.co | ||||||
| NS | d.registrydns.co | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=1759682523 | ||||||
Same first word
Similar names
DNS History
12 records (7 active, 5 former)
○NSns11.domaincontrol.com2015-08-08 → 2016-07-19 · 4 obs
● 2016-07-19 04:09:02
○ 2026-02-16 22:32:16
○ 2026-06-15 04:49:20
○NSns12.domaincontrol.com2015-08-08 → 2016-07-19 · 4 obs
● 2016-07-19 04:09:02
○ 2026-02-16 22:32:16
○ 2026-06-15 04:49:20
●NSns75.domaincontrol.com2026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
●NSns76.domaincontrol.com2026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
○MXmailstore1.secureserver.net2015-08-08 → 2016-07-19 · 4 obs
● 2016-07-19 04:09:02
○ 2026-02-16 22:32:16
○ 2026-06-15 04:49:20
●MXmx1.feishu.cn2026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
●MXmx2.feishu.cn2026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
●MXmx3.feishu.cn2026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
○MXsmtp.secureserver.net2015-08-08 → 2016-07-19 · 4 obs
● 2016-07-19 04:09:02
○ 2026-02-16 22:32:16
○ 2026-06-15 04:49:20
●A15.197.148.332026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
●A3.33.130.1902026-02-16 → 2026-06-15 · 3 obs
● 2026-02-16 22:32:16
● 2026-06-15 04:49:20
○A50.63.202.332015-08-08 → 2016-07-19 · 4 obs
● 2016-07-19 04:09:02
○ 2026-02-16 22:32:16
○ 2026-06-15 04:49:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | a.registrydns.co, c.registrydns.co, b.registrydns.co, d.registrydns.co | - |
| simplex.co | ns75.domaincontrol.com, ns76.domaincontrol.com | - |
✅ Authoritative Response
Server:97.74.107.48
NS records: ns75.domaincontrol.com, ns76.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for simplex.co (unsigned zone)
⏱️ Timing
Total: 295ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 3.33.130.190, 15.197.148.33 |
| NS | 2 | ns75.domaincontrol.com, ns76.domaincontrol.com |
| MX | 3 | mx1.feishu.cn (pri: 1), mx2.feishu.cn (pri: 5)... |
| TXT | 2 | verification-code-site-App_feishu=MWZqwd, v=spf1 +include:_netblocks.m.feishu.cn - |
| SOA | 1 | ns75.domaincontrol.com dns.jomax.net |
Analysis
IP Addresses
simplex.co points to the IP addresses 3.33.130.190 and 15.197.148.33
tumblerdecal.com, vralfa.com, lysnup.com and two other host names share IP numbers with simplex.co.
Name Servers
simplex.co has two authoritative name servers — ns75.domaincontrol.com and ns76.domaincontrol.com.
simplex.co uses the same name servers as several other domains — among them appliedhomecare.com, forcecustom.com, takeoverweb.com and two more.
Both ns75.domaincontrol.com and ns76.domaincontrol.com have two IP addresses each. ns75.domaincontrol.com resolves to 97.74.107.48 and 2603:5:21b4::30; ns76.domaincontrol.com resolves to 173.201.75.48 and 2603:5:22b4::30.
Mail Servers
The MX records for simplex.co list three mail servers: mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.
simplex.co has at least partial mail server overlap with other domains such as ruoai.cn, ascendconsultantltd.com, wewantbest.com and two more.
Hostnames that resolve to three IP addresses:
mx3.feishu.cn resolves to 52.220.106.220, 101.126.58.225 and 122.14.229.0.
Hostnames that resolve to two IP addresses:
mx2.feishu.cn resolves to 101.126.58.225 and 122.14.229.0.
Hosts with just one IP address:
mx1.feishu.cn resolves to 52.220.106.220.
The host names mx3.feishu.cn and mx1.feishu.cn both resolve to 52.220.106.220 IP addresses.
The host names mx3.feishu.cn and mx2.feishu.cn both resolve to 101.126.58.225 IP addresses.
The host names mx3.feishu.cn and mx2.feishu.cn both resolve to 122.14.229.0 IP addresses.