21st-concept.com - robtex.com
21st-concept.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 166.117.120.15🇺🇸 Amazon166.117.112.0/20 | ||||||
| PTR | a3cf8ee3c29cadf90.awsglobalaccelerator.com | ||||||
| NS | ns1.enter-system.com ⭐ | ||||||
| A | 166.117.243.173🇺🇸 Amazon166.117.240.0/20 | ||||||
| PTR | ab8649197436604e4.awsglobalaccelerator.com | ||||||
| NS | ns2.enter-system.com | ||||||
| A | 166.117.126.2🇺🇸 Amazon166.117.112.0/20 | ||||||
| PTR | ab8649197436604e4.awsglobalaccelerator.com | ||||||
| MX | mailme.enter-system.com ⭐ | ||||||
| A | 216.55.101.204🇨🇦 AS3356216.55.96.0/21 Smart Servers USA Network C/O PureVoltage Hosting Inc. 7 Teleport Drive Staten Island, NY 10311 United States | ||||||
| PTR | spamwall.enter-system.com | ||||||
| MX | mailme-backup.enter-system.com(10) | ||||||
| A | 216.55.101.204🇨🇦 AS3356216.55.96.0/21 Smart Servers USA Network C/O PureVoltage Hosting Inc. 7 Teleport Drive Staten Island, NY 10311 United States | ||||||
| PTR | spamwall.enter-system.com | ||||||
| TXT | v=spf1 include:spf.enter-system.com | ||||||
| SOA | ns1.enter-system.comadministrator@21st-concept.com 2026-01-20 #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 | ||||||
DNS History
6 records (5 active, 1 former)
●NSns1.enter-system.com2015-07-19 → 2026-03-21 · 2 obs
● 2026-03-21 09:46:24
●NSns2.enter-system.com2015-07-19 → 2026-03-21 · 2 obs
● 2026-03-21 09:46:24
●MXmailme-backup.enter-system.com2015-07-19 → 2026-03-21 · 2 obs
● 2026-03-21 09:46:24
●MXmailme.enter-system.com2015-07-19 → 2026-03-21 · 2 obs
● 2026-03-21 09:46:24
●A166.117.120.152026-03-21 → 2026-03-21 · 3 obs
● 2026-03-21 09:46:22
● 2026-03-21 09:46:24
○A54.76.177.852015-07-19 → 2018-08-10 · 4 obs
● 2018-08-10 13:41:58
○ 2026-03-21 09:46:22
○ 2026-03-21 09:46:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| 21st-concept.com | ns1.enter-system.com, ns2.enter-system.com | 2 records |
✅ Authoritative Response
Server: 166.117.243.173
NS records: ns1.enter-system.com, ns2.enter-system.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21st-concept.com (unsigned zone)
⏱️ Timing
Total: 260ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 166.117.120.15 |
| NS | 2 | ns1.enter-system.com, ns2.enter-system.com |
| MX | 3 | mailme-backup.enter-system.com (pri: 20), mailme.enter-system.com (pri: 0)... |
| TXT | 1 | v=spf1 include:spf.enter-system.com |
| SOA | 1 | ns1.enter-system.com administrator.21st- |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.enter-system.com, ns2.enter-system.com)
Analysis
IP Addresses
21st-concept.com points to a single IP number: 166.117.120.15.
Other host names, for instance saracarmel.com, compassenglish.net, apservices.biz, arugam-bay.co.il and teamisaac.org share IP numbers with 21st-concept.com.
Name Servers
21st-concept.com is delegated to two name servers: ns1.enter-system.com and ns2.enter-system.com.
21st-concept.com uses the same name server setup as other domains, for instance edgedanceplano.com, atrak.co.il, ilead.co.il, tourenracer.at and veloise-group.com.
21st-concept.com partially shares name servers with other domains, for instance lernya.com.
Host names with one IP number:
ns1.enter-system.com points to: 166.117.243.173.
ns2.enter-system.com points to: 166.117.126.2.
Mail Servers
21st-concept.com is handled by two mail servers: mailme-backup.enter-system.com and mailme.enter-system.com.
21st-concept.com shares the same mail server setup as other domains, including design2be.co.il, klouvatos.com, dalell.com, rateadjustor.com and drcct.com.
21st-concept.com shares some mail servers with other domains, including peopleempowered.org, marcotech.co.il, rightmanagement.co.il, globalteleaccess.com and northproservices.ca.
These mail servers are commonly used together with aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
Host names with a single IP number:
mailme-backup.enter-system.com points to 216.55.101.204.
mailme.enter-system.com points to 216.55.101.204.
Host names pointing to 216.55.101.204: mailme-backup.enter-system.com and mailme.enter-system.com.