centurt21.com - robtex.com

centurt21.com

DNSSEC⚠️ Not signed
A3.21.30.236🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix
PTRec2-3-21-30-236.us-east-2.compute.amazonaws.com
A3.138.52.249🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix
NSns-1702.awsdns-20.co.uk ⭐
A2600:9000:5306:a600::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront
PTRns-1702.awsdns-20.co.uk
A205.251.198.166🇺🇸 Amazon205.251.198.0/24 prefix
PTRns-1702.awsdns-20.co.uk
NSns-110.awsdns-13.com
A2600:9000:5300:6e00::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront
PTRns-110.awsdns-13.com
A205.251.192.110🇺🇸 Amazon205.251.192.0/24 prefix
PTRns-110.awsdns-13.com
NSns-1456.awsdns-54.org
A2600:9000:5305:b000::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1456.awsdns-54.org
A205.251.197.176🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1456.awsdns-54.org
NSns-723.awsdns-26.net
A2600:9000:5302:d300::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront
PTRns-723.awsdns-26.net
A205.251.194.211🇺🇸 Amazon205.251.194.0/24 prefix
PTRns-723.awsdns-26.net
SOAns-1702.awsdns-20.co.ukawsdns-hostmaster@amazon.com serial=1

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1778209651

Same first word

centurt21.com

DNS History

18 records (6 active, 12 former)

20162017201820192020202120222023202420252026NSns-110.awsdns-13.comns-1456.awsdns-54.orgns-1702.awsdns-20.co.ukns-723.awsdns-26.netns1.savvis.netns2.savvis.netns3.savvis.netns4.savvis.netns5.savvis.netA3.138.52.2493.21.30.23618.118.64.203.13.43.1383.137.7.1563.14.0.623.151.64.683.18.210.2053.23.162.84
●NSns-110.awsdns-13.com2020-03-14 → 2026-05-08 · 3 obs
○ 2017-03-24 15:10:58
● 2020-03-14 16:45:26
● 2026-05-08 03:36:34
●NSns-1456.awsdns-54.org2020-03-14 → 2026-05-08 · 3 obs
○ 2017-03-24 15:10:58
● 2020-03-14 16:45:26
● 2026-05-08 03:36:34
●NSns-1702.awsdns-20.co.uk2020-03-14 → 2026-05-08 · 3 obs
○ 2017-03-24 15:10:58
● 2020-03-14 16:45:26
● 2026-05-08 03:36:34
●NSns-723.awsdns-26.net2020-03-14 → 2026-05-08 · 3 obs
○ 2017-03-24 15:10:58
● 2020-03-14 16:45:26
● 2026-05-08 03:36:34
○NSns1.savvis.net2015-05-30 → 2017-03-24 · 4 obs
● 2015-05-30 04:56:58
● 2017-03-24 15:10:58
○ 2020-03-14 16:45:26
○ 2026-05-08 03:36:34
○NSns2.savvis.net2015-05-30 → 2017-03-24 · 4 obs
● 2015-05-30 04:56:58
● 2017-03-24 15:10:58
○ 2020-03-14 16:45:26
○ 2026-05-08 03:36:34
○NSns3.savvis.net2015-05-30 → 2017-03-24 · 4 obs
● 2015-05-30 04:56:58
● 2017-03-24 15:10:58
○ 2020-03-14 16:45:26
○ 2026-05-08 03:36:34
○NSns4.savvis.net2015-05-30 → 2017-03-24 · 4 obs
● 2015-05-30 04:56:58
● 2017-03-24 15:10:58
○ 2020-03-14 16:45:26
○ 2026-05-08 03:36:34
○NSns5.savvis.net2015-05-30 → 2017-03-24 · 4 obs
● 2015-05-30 04:56:58
● 2017-03-24 15:10:58
○ 2020-03-14 16:45:26
○ 2026-05-08 03:36:34
○A18.118.64.202026-03-29 → 2026-05-08 · 2 obs
○ 2026-03-29 16:34:42
○ 2026-05-08 03:36:34
○A3.13.43.1382020-03-14 → 2020-03-14 · 3 obs
● 2020-03-14 16:45:26
○ 2026-03-29 16:34:42
○ 2026-05-08 03:36:34
○A3.137.7.1562026-03-29 → 2026-03-29 · 4 obs
○ 2020-03-14 16:45:26
● 2026-03-29 16:34:42
○ 2026-05-05 12:31:20
○ 2026-05-08 03:36:34
●A3.138.52.2492026-05-05 → 2026-05-08 · 3 obs
○ 2026-03-29 16:34:42
● 2026-05-05 12:31:20
● 2026-05-08 03:36:34
○A3.14.0.622020-03-14 → 2020-03-14 · 3 obs
● 2020-03-14 16:45:26
○ 2026-03-29 16:34:42
○ 2026-05-08 03:36:34
○A3.151.64.682026-03-29 → 2026-05-08 · 2 obs
○ 2026-03-29 16:34:42
○ 2026-05-08 03:36:34
○A3.18.210.2052026-03-29 → 2026-03-29 · 4 obs
○ 2020-03-14 16:45:26
● 2026-03-29 16:34:42
○ 2026-05-05 12:31:20
○ 2026-05-08 03:36:34
●A3.21.30.2362026-05-08 → 2026-05-08 · 3 obs
○ 2026-05-05 12:31:20
● 2026-05-08 03:36:32
● 2026-05-08 03:36:34
○A3.23.162.842026-05-05 → 2026-05-05 · 4 obs
○ 2026-03-29 16:34:42
● 2026-05-05 12:31:20
○ 2026-05-08 03:36:32
○ 2026-05-08 03:36:34

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comi.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net...-
centurt21.comns-110.awsdns-13.com, ns-723.awsdns-26.net, ns-1702.awsdns-20.co.uk, ns-1456.awsdns-54.org2 records

✅ Authoritative Response

Server:205.251.198.166

NS records: ns-110.awsdns-13.com, ns-723.awsdns-26.net, ns-1702.awsdns-20.co.uk, ns-1456.awsdns-54.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for centurt21.com (unsigned zone)

⏱️ Timing

Total: 669ms | Queries: -

📄 Records

TypeCountSample Data
A23.21.30.236, 3.138.52.249
NS4ns-110.awsdns-13.com, ns-1456.awsdns-54.org...
SOA1ns-1702.awsdns-20.co.uk awsdns-hostmaste

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-110.awsdns-13.com, ns-110.awsdns-13.com)

Analysis

IP Addresses

centurt21.com resolves to two IPs: 3.21.30.236 and 3.138.52.249.

other host names for instance century21minnesota.com, century21missouri.com, century21ut.com, century21justtimeshares.com and centry21thomas.com share IP numbers with centurt21.com.

Name Servers

centurt21.com is delegated to four name servers: ns-110.awsdns-13.com, ns-723.awsdns-26.net, ns-1456.awsdns-54.org and ns-1702.awsdns-20.co.uk.

centurt21.com at least partially shares name servers with other domains, for instance alltimehub.com, d2klov4ljsu4mi.cloudfront.net, d2pt51mz8tco2c.cloudfront.net, presencesync.com and avix.co.uk.

Host names with two IP numbers:

Host name ns-110.awsdns-13.com points to: 2600:9000:5300:6e00::1 and 205.251.192.110.

Host name ns-723.awsdns-26.net points to: 2600:9000:5302:d300::1 and 205.251.194.211.

Host name ns-1456.awsdns-54.org points to: 2600:9000:5305:b000::1 and 205.251.197.176.

Host name ns-1702.awsdns-20.co.uk points to: 2600:9000:5306:a600::1 and 205.251.198.166.