centuri21.com - robtex.com
centuri21.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-71.awsdns-08.com ⭐ | ||||||
| A | 2600:9000:5300:4700::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront | ||||||
| PTR | ns-71.awsdns-08.com | ||||||
| A | 205.251.192.71🇺🇸 Amazon205.251.192.0/24 prefix | ||||||
| PTR | ns-71.awsdns-08.com | ||||||
| NS | ns-1450.awsdns-53.org | ||||||
| A | 2600:9000:5305:aa00::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront | ||||||
| PTR | ns-1450.awsdns-53.org | ||||||
| A | 205.251.197.170🇺🇸 Amazon205.251.197.0/24 prefix | ||||||
| PTR | ns-1450.awsdns-53.org | ||||||
| NS | ns-2003.awsdns-58.co.uk | ||||||
| A | 2600:9000:5307:d300::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront | ||||||
| PTR | ns-2003.awsdns-58.co.uk | ||||||
| A | 205.251.199.211🇺🇸 Amazon205.251.199.0/24 prefix | ||||||
| PTR | ns-2003.awsdns-58.co.uk | ||||||
| NS | ns-559.awsdns-05.net | ||||||
| A | 2600:9000:5302:2f00::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront | ||||||
| PTR | ns-559.awsdns-05.net | ||||||
| A | 205.251.194.47🇺🇸 Amazon205.251.194.0/24 prefix | ||||||
| PTR | ns-559.awsdns-05.net | ||||||
| SOA | ns-71.awsdns-08.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=1778281336 | ||||||
Same first word
centuri21.com |
DNS History
13 records (6 active, 7 former)
●NSns-1450.awsdns-53.org2020-04-09 → 2026-05-08 · 3 obs
● 2020-04-09 13:08:22
● 2026-05-08 23:29:22
●NSns-2003.awsdns-58.co.uk2020-04-09 → 2026-05-08 · 3 obs
● 2020-04-09 13:08:22
● 2026-05-08 23:29:22
●NSns-559.awsdns-05.net2020-04-09 → 2026-05-08 · 3 obs
● 2020-04-09 13:08:22
● 2026-05-08 23:29:22
●NSns-71.awsdns-08.com2020-04-09 → 2026-05-08 · 3 obs
● 2020-04-09 13:08:22
● 2026-05-08 23:29:22
○NSns1.savvis.net2015-06-11 → 2017-04-03 · 4 obs
● 2017-04-03 11:23:30
○ 2020-04-09 13:08:22
○ 2026-05-08 23:29:22
○NSns2.savvis.net2015-06-11 → 2017-04-03 · 4 obs
● 2017-04-03 11:23:30
○ 2020-04-09 13:08:22
○ 2026-05-08 23:29:22
○NSns3.savvis.net2015-06-11 → 2017-04-03 · 4 obs
● 2017-04-03 11:23:30
○ 2020-04-09 13:08:22
○ 2026-05-08 23:29:22
○A216.91.43.682015-06-11 → 2017-04-03 · 4 obs
● 2017-04-03 11:23:30
○ 2020-04-09 13:08:22
○ 2026-05-08 23:29:22
●A3.138.52.2492026-05-05 → 2026-05-08 · 3 obs
● 2026-05-05 12:31:38
● 2026-05-08 23:29:22
○A3.14.0.622020-04-09 → 2020-04-09 · 4 obs
● 2020-04-09 13:08:22
○ 2026-05-05 12:31:38
○ 2026-05-08 23:29:22
○A3.18.9.2002020-04-09 → 2020-04-09 · 4 obs
● 2020-04-09 13:08:22
○ 2026-05-05 12:31:38
○ 2026-05-08 23:29:22
●A3.21.30.2362026-05-08 → 2026-05-08 · 3 obs
● 2026-05-08 07:40:08
● 2026-05-08 23:29:22
○A3.23.162.842026-05-05 → 2026-05-05 · 4 obs
● 2026-05-05 12:31:38
○ 2026-05-08 07:40:08
○ 2026-05-08 23:29:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | j.gtld-servers.net, f.gtld-servers.net, e.gtld-servers.net, d.gtld-servers.net... | - |
| centuri21.com | ns-71.awsdns-08.com, ns-559.awsdns-05.net, ns-2003.awsdns-58.co.uk, ns-1450.awsdns-53.org | 2 records |
✅ Authoritative Response
Server:205.251.192.71
NS records: ns-71.awsdns-08.com, ns-559.awsdns-05.net, ns-2003.awsdns-58.co.uk, ns-1450.awsdns-53.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for centuri21.com (unsigned zone)
⏱️ Timing
Total: 503ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 3.21.30.236, 3.138.52.249 |
| NS | 4 | ns-1450.awsdns-53.org, ns-2003.awsdns-58.co.uk... |
| SOA | 1 | ns-71.awsdns-08.com awsdns-hostmaster.am |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-71.awsdns-08.com, ns-71.awsdns-08.com)
Analysis
IP Addresses
The entity centuri21.com points to two IP numbers: 3.21.30.236 and 3.138.52.249.
For instance, other host names century21al.com, c21survey.com, century21tennessee.com, century21ohio.com and century21.us share IP numbers with centuri21.com.
Name Servers
centuri21.com is delegated to four name servers: ns-71.awsdns-08.com, ns-559.awsdns-05.net, ns-1450.awsdns-53.org and ns-2003.awsdns-58.co.uk.
centuri21.com shares name servers with other domains at least partially, for example beckerdigitalbootcamp.com, ajishio.jp, palscape.com, 135.255.54.in-addr.arpa and 119.74.52.in-addr.arpa.
These name servers are commonly used together with ns1-24-ap-southeast-1.ec2-rdns.amazonaws.com, ns2-24-ap-southeast-1.ec2-rdns.amazonaws.com, ns3-24-ap-southeast-1.ec2-rdns.amazonaws.com and ns4-24-ap-southeast-1.ec2-rdns.amazonaws.com.
Host names with two IP numbers:
ns-71.awsdns-08.com points to: 2600:9000:5300:4700::1 and 205.251.192.71
ns-559.awsdns-05.net points to: 2600:9000:5302:2f00::1 and 205.251.194.47
ns-1450.awsdns-53.org points to: 2600:9000:5305:aa00::1 and 205.251.197.170
ns-2003.awsdns-58.co.uk points to: 2600:9000:5307:d300::1 and 205.251.199.211