21classic.com - robtex.com
21classic.com
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 | ||||||
Same first word
21classic.com |
Similar names
DNS History
14 records (10 active, 4 former)
●NSns.cisdata.com2015-08-22 → 2026-03-11 · 2 obs
● 2026-03-11 07:43:04
●NSns.cisdata.net2015-08-22 → 2026-03-11 · 2 obs
● 2026-03-11 07:43:04
●NSns2.cisdata.com2015-08-22 → 2026-03-11 · 2 obs
● 2026-03-11 07:43:04
●NSns2.cisdata.net2015-08-22 → 2026-03-11 · 2 obs
● 2026-03-11 07:43:04
●MXalt1.aspmx.l.google.com2015-12-08 → 2026-03-11 · 3 obs
● 2015-12-08 09:54:56
● 2026-03-11 07:43:04
●MXalt2.aspmx.l.google.com2015-12-08 → 2026-03-11 · 3 obs
● 2015-12-08 09:54:56
● 2026-03-11 07:43:04
●MXalt3.aspmx.l.google.com2015-12-08 → 2026-03-11 · 3 obs
● 2015-12-08 09:54:56
● 2026-03-11 07:43:04
●MXalt4.aspmx.l.google.com2015-12-08 → 2026-03-11 · 3 obs
● 2015-12-08 09:54:56
● 2026-03-11 07:43:04
●MXaspmx.l.google.com2015-12-08 → 2026-03-11 · 3 obs
● 2015-12-08 09:54:56
● 2026-03-11 07:43:04
○MXmx01.high-availability-ihouseweb.com2015-08-22 → 2015-08-22 · 3 obs
○ 2015-12-08 09:54:56
○ 2026-03-11 07:43:04
○MXmx02.high-availability-ihouseweb.com2015-08-22 → 2015-08-22 · 3 obs
○ 2015-12-08 09:54:56
○ 2026-03-11 07:43:04
●A104.154.23.2292026-03-11 → 2026-03-11 · 3 obs
● 2026-03-11 07:43:02
● 2026-03-11 07:43:04
○A130.211.17.2002016-07-06 → 2017-04-03 · 5 obs
● 2016-07-06 11:03:00
● 2017-04-03 19:11:42
○ 2026-03-11 07:43:02
○ 2026-03-11 07:43:04
○A74.122.34.1752015-08-22 → 2015-12-08 · 4 obs
● 2015-12-08 09:54:56
○ 2016-07-06 11:03:00
○ 2026-03-11 07:43:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net, h.gtld-servers.net... | - |
| 21classic.com | ns.cisdata.net, ns2.cisdata.net, ns.cisdata.com, ns2.cisdata.com | 2 records |
✅ Authoritative Response
Server: 104.197.96.136
NS records: ns.cisdata.net, ns2.cisdata.net, ns.cisdata.com, ns2.cisdata.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21classic.com (unsigned zone)
⏱️ Timing
Total: 493ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 104.154.23.229 |
| NS | 4 | ns.cisdata.net, ns2.cisdata.com... |
| MX | 5 | ASPMX.L.GOOGLE.com (pri: 1), ALT4.ASPMX.L.GOOGLE.com (pri: 10)... |
| TXT | 2 | v=spf1 a mx a:mail.cisdata.net include:_, v=spf1 a mx a:mail.cisdata.net include:_ |
| SOA | 1 | ns.cisdata.net it.cisdata.net |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns.cisdata.com, ns2.cisdata.com)
Analysis
IP Addresses
21classic.com points to a single IP: 104.154.23.229.
Other host names, for instance caroleandmoriah.com, shultzrealtyinc.com, conradrealty.com, findmyhouseflorida.com and njhomesandfarms.com share IP numbers with 21classic.com.
Name Servers
21classic.com is delegated to four name servers: ns2.cisdata.com, ns.cisdata.com, ns2.cisdata.net and ns.cisdata.net.
21classic.com at least partially shares its name servers with other domains, for instance northshorehomefinders.com, firstcoastrealtyofjax.com, eliteagentsample.com, wainwrightrealtors.com and eabcommercial.com.
Host names with a single IP address:
ns2.cisdata.com and ns2.cisdata.net point to 162.222.176.146; ns.cisdata.com and ns.cisdata.net point to 104.197.96.136.
Mail Servers
Five mail servers handle 21classic.com: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.
21classic.com shares some mail servers with other domains, including ns500693.ns500699.ns500693.ns500734.ns500699.ns500728.ns500693.ns500588.ns500588.ns500683.ns500632.ns500632.dtrkdll.com, ns500765.ns500765.ns500734.ns500699.ns500734.ns500734.ns500699.ns500699.ns500683.ns500632.ns500588.ns500578.ns500110.dtrkdll.com, maljenkins.com, ns500768.ns500758.ns500758.ns500735.ns500698.ns500735.ns500735.ns500698.ns500708.ns500619.ns500652.ns500619.ns500619.trackreceptor.com and ns500698.ns500759.ns500698.ns500758.ns500698.ns500736.ns500735.ns500735.ns500735.ns500698.ns500698.ns500652.ns500619.ns500576.trackreceptor.com.
These mail servers are commonly used alongside the mail servers aspmx2.googlemail.com and aspmx3.googlemail.com.
Host names with two IP numbers:
aspmx.l.google.com points to 2607:f8b0:4004:c19::1b and 172.253.62.27.
alt1.aspmx.l.google.com points to 2607:f8b0:4003:c30::1b and 74.125.27.26.
alt2.aspmx.l.google.com points to 2607:f8b0:4001:c70::1a and 192.178.209.26.
alt3.aspmx.l.google.com points to 2607:f8b0:4024:c0d::1b and 192.178.152.26.
alt4.aspmx.l.google.com points to 2607:f8b0:4023:403::1a and 142.250.96.27.