c21survey.com - robtex.com
c21survey.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.21.30.236🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix | ||||||
| PTR | ec2-3-21-30-236.us-east-2.compute.amazonaws.com | ||||||
| A | 3.138.52.249🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix | ||||||
| NS | ns-389.awsdns-48.com ⭐ | ||||||
| A | 2600:9000:5301:8500::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront | ||||||
| PTR | ns-389.awsdns-48.com | ||||||
| A | 205.251.193.133🇺🇸 Amazon205.251.193.0/24 prefix | ||||||
| PTR | ns-389.awsdns-48.com | ||||||
| NS | ns-1099.awsdns-09.org | ||||||
| A | 2600:9000:5304:4b00::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront | ||||||
| PTR | ns-1099.awsdns-09.org | ||||||
| A | 205.251.196.75🇺🇸 Amazon205.251.196.0/24 prefix | ||||||
| PTR | ns-1099.awsdns-09.org | ||||||
| NS | ns-1544.awsdns-01.co.uk | ||||||
| A | 2600:9000:5306:800::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront | ||||||
| PTR | ns-1544.awsdns-01.co.uk | ||||||
| A | 205.251.198.8🇺🇸 Amazon205.251.198.0/24 prefix | ||||||
| PTR | ns-1544.awsdns-01.co.uk | ||||||
| NS | ns-643.awsdns-16.net | ||||||
| A | 2600:9000:5302:8300::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront | ||||||
| PTR | ns-643.awsdns-16.net | ||||||
| A | 205.251.194.131🇺🇸 Amazon205.251.194.0/24 prefix | ||||||
| PTR | ns-643.awsdns-16.net | ||||||
| SOA | ns-389.awsdns-48.comawsdns-hostmaster@amazon.com serial=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=1778259286 | ||||||
Same first word
c21survey.com |
DNS History
11 records (6 active, 5 former)
●NSns-1099.awsdns-09.org2026-05-05 → 2026-05-08 · 3 obs
● 2026-05-05 12:33:36
● 2026-05-08 17:02:14
●NSns-1544.awsdns-01.co.uk2026-05-05 → 2026-05-08 · 3 obs
● 2026-05-05 12:33:36
● 2026-05-08 17:02:14
●NSns-389.awsdns-48.com2026-05-05 → 2026-05-08 · 3 obs
● 2026-05-05 12:33:36
● 2026-05-08 17:02:14
●NSns-643.awsdns-16.net2026-05-05 → 2026-05-08 · 3 obs
● 2026-05-05 12:33:36
● 2026-05-08 17:02:14
○NSns1.savvis.net2015-06-10 → 2017-06-02 · 4 obs
● 2017-06-02 14:19:20
○ 2026-05-05 12:33:36
○ 2026-05-08 17:02:14
○NSns2.savvis.net2015-06-10 → 2017-06-02 · 4 obs
● 2017-06-02 14:19:20
○ 2026-05-05 12:33:36
○ 2026-05-08 17:02:14
○NSns3.savvis.net2015-06-10 → 2017-06-02 · 4 obs
● 2017-06-02 14:19:20
○ 2026-05-05 12:33:36
○ 2026-05-08 17:02:14
○A216.91.43.682015-06-10 → 2017-06-02 · 4 obs
● 2017-06-02 14:19:20
○ 2026-05-05 12:33:36
○ 2026-05-08 17:02:14
●A3.138.52.2492026-05-05 → 2026-05-08 · 3 obs
● 2026-05-05 12:33:36
● 2026-05-08 17:02:14
●A3.21.30.2362026-05-08 → 2026-05-08 · 3 obs
● 2026-05-08 06:47:54
● 2026-05-08 17:02:14
○A3.23.162.842026-05-05 → 2026-05-05 · 4 obs
● 2026-05-05 12:33:36
○ 2026-05-08 06:47:54
○ 2026-05-08 17:02:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| c21survey.com | ns-643.awsdns-16.net, ns-389.awsdns-48.com, ns-1544.awsdns-01.co.uk, ns-1099.awsdns-09.org | 2 records |
✅ Authoritative Response
Server:205.251.196.75
NS records: ns-643.awsdns-16.net, ns-389.awsdns-48.com, ns-1544.awsdns-01.co.uk, ns-1099.awsdns-09.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for c21survey.com (unsigned zone)
⏱️ Timing
Total: 277ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 3.21.30.236, 3.138.52.249 |
| NS | 4 | ns-1099.awsdns-09.org, ns-1544.awsdns-01.co.uk... |
| SOA | 1 | ns-389.awsdns-48.com awsdns-hostmaster.a |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-389.awsdns-48.com, ns-389.awsdns-48.com)
Analysis
IP Addresses
c21survey.com points to two IP numbers: 3.21.30.236 and 3.138.52.249.
Other host names, for instance centuty21.com, certury21.com, century21mn.com, century21premierhomes.com and century21mortgages.com share IP numbers with c21survey.com.
Name Servers
c21survey.com is delegated to four name servers: ns-389.awsdns-48.com, ns-643.awsdns-16.net, ns-1099.awsdns-09.org and ns-1544.awsdns-01.co.uk.
c21survey.com at least partially shares name servers with other domains, for instance prop13newdeal.com, nj.io, cbelab.org, boligbytte.com and creditoagil.com.br.
These name servers are commonly used with the name servers ns-640.awsdns-16.net.
Host names with two IP numbers:
ns-389.awsdns-48.com points to: 2600:9000:5301:8500::1 and 205.251.193.133.
ns-643.awsdns-16.net points to: 2600:9000:5302:8300::1 and 205.251.194.131.
ns-1099.awsdns-09.org points to: 2600:9000:5304:4b00::1 and 205.251.196.75.
ns-1544.awsdns-01.co.uk points to: 2600:9000:5306:800::1 and 205.251.198.8.