c21edu.com - robtex.com
c21edu.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
c21edu.com |
Similar names
DNS History
10 records (10 active, 0 former)
●NSns1.wordpress.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●NSns2.wordpress.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●NSns3.wordpress.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●MXalt1.aspmx.l.google.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●MXalt2.aspmx.l.google.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●MXaspmx.l.google.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●MXaspmx2.googlemail.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●MXaspmx3.googlemail.com2015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●A192.0.78.242015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
●A192.0.78.252015-06-12 → 2026-03-18 · 2 obs
● 2026-03-18 14:52:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| c21edu.com | ns1.wordpress.com, ns2.wordpress.com, ns3.wordpress.com | 6 records |
✅ Authoritative Response
Server: 192.0.74.9
NS records: ns1.wordpress.com, ns2.wordpress.com, ns3.wordpress.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for c21edu.com (unsigned zone)
⏱️ Timing
Total: 509ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 192.0.78.24, 192.0.78.25 |
| NS | 3 | ns1.wordpress.com, ns3.wordpress.com... |
| MX | 5 | ASPMX3.GOOGLEMAIL.com (pri: 10), ASPMX2.GOOGLEMAIL.com (pri: 10)... |
| TXT | 1 | v=spf1 include:aspmx.googlemail.com ~all |
| SOA | 1 | ns1.wordpress.com hostmaster.wordpress.c |
📌 Glue Records Collected
Total: 6
Out-of-bailiwick: 6 (ns1.wordpress.com, ns1.wordpress.com, ns2.wordpress.com...)
Analysis
IP Addresses
c21edu.com points to two IP numbers: 192.0.78.24 and 192.0.78.25.
Other host names such as celebrationsoflight.com, nhlanguageservices.com, blythegamblemusic.com, hronline.ca and superellips.se share IPs with c21edu.com.
Name Servers
c21edu.com is delegated to three name servers: ns1.wordpress.com, ns2.wordpress.com and ns3.wordpress.com.
c21edu.com at least partially shares name servers with other domains, for instance sweatersonsweaters.com, bjjvirtualtrainer.com, teslahou.com, comm-art.com and kraftraum.net.
Host ns1.wordpress.com points to 2a04:fa87:ffff::c6b5:7409 and 198.181.116.9; Host ns2.wordpress.com points to 2a04:fa87:ffff::c6b5:7509 and 198.181.117.9; Host ns3.wordpress.com points to 2620:115:c00f::c000:4a09 and 192.0.74.9.
Mail Servers
Five mail servers handle c21edu.com: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
c21edu.com shares at least partially some mail servers with other domains, including ns500671.ns500742.ns500671.ns500671.ns500704.ns500671.ns500688.ns500705.ns500671.ns500142.lusty(0x736c7574)z.com, switch-ec.com, wayju.com, pinewoodhotel.co.uk and ns500765.ns500693.ns500734.ns500699.ns500734.ns500699.ns500699.ns500693.ns500699.ns500588.ns500588.ns500632.ns500588.ns500612.ns500588.ns500578.ns500110.dtrkdll.com.
these mail servers are often used together with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IP numbers:
Hostname aspmx2.googlemail.com points to 2607:f8b0:4023:2801::1b and 192.178.128.27.
Hostname aspmx3.googlemail.com points to 2607:f8b0:4023:1015::1b and 172.253.135.26.
Hostname aspmx.l.google.com points to 2607:f8b0:4004:c19::1b and 172.253.62.27.
Hostname alt1.aspmx.l.google.com points to 2607:f8b0:4003:c30::1b and 74.125.27.26.
Hostname alt2.aspmx.l.google.com points to 2607:f8b0:4001:c70::1a and 192.178.209.26.