`century21md.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-948.awsdns-54.net` ⭐
		A	2600:9000:5303:b400::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-948.awsdns-54.net`
		A	205.251.195.180^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-948.awsdns-54.net`
NS	`ns-1212.awsdns-23.org`
		A	2600:9000:5304:bc00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1212.awsdns-23.org`
		A	205.251.196.188^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1212.awsdns-23.org`
NS	`ns-2020.awsdns-60.co.uk`
		A	2600:9000:5307:e400::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2020.awsdns-60.co.uk`
		A	205.251.199.228^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2020.awsdns-60.co.uk`
NS	`ns-445.awsdns-55.com`
		A	2600:9000:5301:bd00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-445.awsdns-55.com`
		A	205.251.193.189^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-445.awsdns-55.com`
SOA	`ns-948.awsdns-54.net`awsdns-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.net`nstld@verisign-grs.com serial=1778226216

Same first word

century21md.com

DNS History

13 records (6 active, 7 former)

●NSns-1212.awsdns-23.org2020-01-15 → 2026-05-08 · 3 obs

○ 2017-03-14 03:13:42
● 2020-01-15 06:19:56
● 2026-05-08 07:52:26

●NSns-2020.awsdns-60.co.uk2020-01-15 → 2026-05-08 · 3 obs

○ 2017-03-14 03:13:42
● 2020-01-15 06:19:56
● 2026-05-08 07:52:26

●NSns-445.awsdns-55.com2020-01-15 → 2026-05-08 · 3 obs

○ 2017-03-14 03:13:42
● 2020-01-15 06:19:56
● 2026-05-08 07:52:26

●NSns-948.awsdns-54.net2020-01-15 → 2026-05-08 · 3 obs

○ 2017-03-14 03:13:42
● 2020-01-15 06:19:56
● 2026-05-08 07:52:26

○NSns1.savvis.net2015-06-03 → 2017-03-14 · 5 obs

○ 2008-03-20 05:59:22
● 2015-06-03 15:22:04
● 2017-03-14 03:13:42
○ 2020-01-15 06:19:56
○ 2026-05-08 07:52:26

○NSns2.savvis.net2015-06-03 → 2017-03-14 · 5 obs

○ 2008-03-20 05:59:22
● 2015-06-03 15:22:04
● 2017-03-14 03:13:42
○ 2020-01-15 06:19:56
○ 2026-05-08 07:52:26

○NSns3.savvis.net2015-06-03 → 2017-03-14 · 5 obs

○ 2008-03-20 05:59:22
● 2015-06-03 15:22:04
● 2017-03-14 03:13:42
○ 2020-01-15 06:19:56
○ 2026-05-08 07:52:26

○A3.13.43.1382020-01-15 → 2020-01-15 · 4 obs

○ 2017-03-14 03:13:42
● 2020-01-15 06:19:56
○ 2026-05-05 12:31:48
○ 2026-05-08 07:52:26

●A3.138.52.2492026-05-05 → 2026-05-08 · 3 obs

○ 2020-01-15 06:19:56
● 2026-05-05 12:31:48
● 2026-05-08 07:52:26

○A3.14.0.622020-01-15 → 2020-01-15 · 4 obs

○ 2017-03-14 03:13:42
● 2020-01-15 06:19:56
○ 2026-05-05 12:31:48
○ 2026-05-08 07:52:26

●A3.21.30.2362026-05-08 → 2026-05-08 · 3 obs

○ 2026-05-05 12:31:48
● 2026-05-08 06:47:54
● 2026-05-08 07:52:26

○A3.23.162.842026-05-05 → 2026-05-05 · 4 obs

○ 2020-01-15 06:19:56
● 2026-05-05 12:31:48
○ 2026-05-08 06:47:54
○ 2026-05-08 07:52:26

○A64.37.197.592015-06-03 → 2017-03-14 · 5 obs

○ 2008-03-20 05:59:22
● 2015-06-03 15:22:04
● 2017-03-14 03:13:42
○ 2020-01-15 06:19:56
○ 2026-05-08 07:52:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, b.gtld-servers.net, a.gtld-servers.net, d.gtld-servers.net...	-
century21md.com	ns-445.awsdns-55.com, ns-948.awsdns-54.net, ns-1212.awsdns-23.org, ns-2020.awsdns-60.co.uk	2 records

✅ Authoritative Response

Server:205.251.199.228

NS records: ns-445.awsdns-55.com, ns-948.awsdns-54.net, ns-1212.awsdns-23.org, ns-2020.awsdns-60.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for century21md.com (unsigned zone)

⏱️ Timing

Total: 253ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`3.21.30.236, 3.138.52.249`
NS	4	`ns-1212.awsdns-23.org, ns-2020.awsdns-60.co.uk...`
SOA	1	`ns-948.awsdns-54.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-445.awsdns-55.com, ns-445.awsdns-55.com)

Analysis

IP Addresses

The entity century21md.com points to two IP numbers: 3.21.30.236 and 3.138.52.249.

For instance, other host names c21smoothmove.com, century21southcarolina.com, century21homeimprovements.info, century21newjersey.com and century21thomasrealty.com share IP numbers with century21md.com.

Name Servers

century21md.com is delegated to four name servers: ns-445.awsdns-55.com, ns-948.awsdns-54.net, ns-1212.awsdns-23.org and ns-2020.awsdns-60.co.uk.

century21md.com shares name servers with other domains at least partially, for example pagofacil.com.bo, xml-spy.org, surnard-couddited.com, fa-doce777.bet and glueapi.io.

These name servers are commonly used with ns-41.awsdns-05.com, ns-834.awsdns-40.net and ns-1940.awsdns-50.co.uk.

Host names with two IP numbers:

ns-445.awsdns-55.com points to: 2600:9000:5301:bd00::1 and 205.251.193.189

ns-948.awsdns-54.net points to: 2600:9000:5303:b400::1 and 205.251.195.180

ns-1212.awsdns-23.org points to: 2600:9000:5304:bc00::1 and 205.251.196.188

ns-2020.awsdns-60.co.uk points to: 2600:9000:5307:e400::1 and 205.251.199.228

century21md.com - robtex.com

century21md.com

com

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`century21md.com`

`com`