duplexcsa.com - dns.ninja

`duplexcsa.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:41d6^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:a715^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.65.214^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.167.21^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`rob.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b8c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rob.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c18c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rob.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:218c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rob.ns.cloudflare.com`
		A	108.162.193.140^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rob.ns.cloudflare.com`
		A	172.64.33.140^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rob.ns.cloudflare.com`
		A	173.245.59.140^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rob.ns.cloudflare.com`
NS	`robin.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ada^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`robin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0da^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`robin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20da^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`robin.ns.cloudflare.com`
		A	108.162.192.218^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`robin.ns.cloudflare.com`
		A	172.64.32.218^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`robin.ns.cloudflare.com`
		A	173.245.58.218^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`robin.ns.cloudflare.com`
MX	`d205275.a.ess.uk.barracudanetworks.com` ⭐
		A	18.133.136.186^{🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix}
			PTR	`mail.ess.uk.barracuda.com`
		A	18.133.136.187^{🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix}
			PTR	`mail.ess.uk.barracuda.com`
		A	18.133.136.188^{🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix}
			PTR	`mail.ess.uk.barracuda.com`
MX	`d205275.b.ess.uk.barracudanetworks.com`⁽³⁰⁾
		A	18.133.136.186^{🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix}
			PTR	`mail.ess.uk.barracuda.com`
		A	18.133.136.187^{🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix}
			PTR	`mail.ess.uk.barracuda.com`
		A	18.133.136.188^{🇬🇧 Amazon18.132.0.0/14 EC2 LHR prefix}
			PTR	`mail.ess.uk.barracuda.com`
TXT	`MS=ms98368806`
TXT	`_globalsign-domain-verification=gMwOinFfDGrzExwYMJMBtZ_X_GNKQfov-OFVdJsK9d`
TXT	`v=spf1 a ip4:87.127.18.252 ip4:176.35.175.122 include:spf.protection.outlook....`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.65.214, 172.67.167.21
		IPv6 hints	2606:4700:3033::6815:41d6, 2606:4700:3037::ac43:a715
SOA	`rob.ns.cloudflare.com`dns@cloudflare.com serial=2405392099

`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=1783073991

Same first word

duplexcsa.com

DNS History

16 records (8 active, 8 former)

○NSns1.livedns.co.uk2015-06-14 → 2020-01-25 · 4 obs

● 2015-06-14 12:16:42
● 2020-01-25 22:42:22
○ 2026-02-18 13:04:08
○ 2026-07-03 10:33:28

○NSns2.livedns.co.uk2015-06-14 → 2020-01-25 · 4 obs

● 2015-06-14 12:16:42
● 2020-01-25 22:42:22
○ 2026-02-18 13:04:08
○ 2026-07-03 10:33:28

○NSns3.livedns.co.uk2015-06-14 → 2020-01-25 · 4 obs

● 2015-06-14 12:16:42
● 2020-01-25 22:42:22
○ 2026-02-18 13:04:08
○ 2026-07-03 10:33:28

●NSrob.ns.cloudflare.com2026-02-18 → 2026-07-03 · 3 obs

○ 2020-01-25 22:42:22
● 2026-02-18 13:04:08
● 2026-07-03 10:33:28

●NSrobin.ns.cloudflare.com2026-02-18 → 2026-07-03 · 3 obs

○ 2020-01-25 22:42:22
● 2026-02-18 13:04:08
● 2026-07-03 10:33:28

●MXd205275.a.ess.uk.barracudanetworks.com2020-01-25 → 2026-07-03 · 3 obs

○ 2017-02-03 04:29:00
● 2020-01-25 22:42:22
● 2026-07-03 10:33:28

●MXd205275.b.ess.uk.barracudanetworks.com2020-01-25 → 2026-07-03 · 3 obs

○ 2017-02-03 04:29:00
● 2020-01-25 22:42:22
● 2026-07-03 10:33:28

○MXduplexcsa.co.uk.bak-mx.uk0100.smtpbak.com2015-06-14 → 2017-02-03 · 4 obs

● 2015-06-14 12:16:42
● 2017-02-03 04:29:00
○ 2020-01-25 22:42:22
○ 2026-07-03 10:33:28

○MXduplexcsa.co.uk.pri-mx.uk0100.smtproutes.com2015-06-14 → 2017-02-03 · 4 obs

● 2015-06-14 12:16:42
● 2017-02-03 04:29:00
○ 2020-01-25 22:42:22
○ 2026-07-03 10:33:28

●A104.21.65.2142026-02-18 → 2026-07-03 · 3 obs

○ 2020-01-25 22:42:22
● 2026-02-18 13:04:08
● 2026-07-03 10:33:28

●A172.67.167.212026-02-18 → 2026-07-03 · 3 obs

○ 2020-01-25 22:42:22
● 2026-02-18 13:04:08
● 2026-07-03 10:33:28

○A188.240.191.1612020-01-25 → 2020-01-25 · 4 obs

○ 2017-02-03 04:29:00
● 2020-01-25 22:42:22
○ 2026-02-18 13:04:08
○ 2026-07-03 10:33:28

●A2606:4700:3033::6815:41d62026-06-29 → 2026-07-03 · 3 obs

○ 2026-05-20 14:51:22
● 2026-06-29 02:19:12
● 2026-07-03 10:33:28

○A2606:4700:3036::6815:41d62026-02-18 → 2026-05-20 · 5 obs

○ 2020-01-25 22:42:22
● 2026-02-18 13:04:08
● 2026-05-20 14:51:22
○ 2026-06-29 02:19:12
○ 2026-07-03 10:33:28

●A2606:4700:3037::ac43:a7152026-02-18 → 2026-07-03 · 3 obs

○ 2020-01-25 22:42:22
● 2026-02-18 13:04:08
● 2026-07-03 10:33:28

○A88.170.125.232015-06-14 → 2017-02-03 · 4 obs

● 2015-06-14 12:16:42
● 2017-02-03 04:29:00
○ 2020-01-25 22:42:22
○ 2026-07-03 10:33:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	f.gtld-servers.net, e.gtld-servers.net, g.gtld-servers.net, k.gtld-servers.net...	-
duplexcsa.com	rob.ns.cloudflare.com, robin.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:172.64.33.140

NS records: rob.ns.cloudflare.com, robin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duplexcsa.com (unsigned zone)

⏱️ Timing

Total: 169ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.65.214, 172.67.167.21`
AAAA	2	`2606:4700:3037::ac43:a715, 2606:4700:3033::6815:41d6`
NS	2	`rob.ns.cloudflare.com, robin.ns.cloudflare.com`
MX	2	`d205275.a.ess.uk.barracudanetworks.com (, d205275.b.ess.uk.barracudanetworks.com (`
TXT	3	`MS=ms98368806, _globalsign-domain-verification=gMwOinFf...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`rob.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (rob.ns.cloudflare.com, rob.ns.cloudflare.com, rob.ns.cloudflare.com...)

Analysis

IP Addresses

duplexcsa.com resolves to four IP addresses: 104.21.65.214, 172.67.167.21, 2606:4700:3033::6815:41d6 and 2606:4700:3037::ac43:a715.

Additional host names — www.sawsamsaicatering.com, www.denisesimmons.com, sacheart.org and two others — share IP numbers with duplexcsa.com.

Name Servers

duplexcsa.com is delegated to two name servers: rob.ns.cloudflare.com and robin.ns.cloudflare.com.

duplexcsa.com shares its name server setup with other domains, including miloais88.com, dsdistribution.co.za, slrbooth.com and two others.

duplexcsa.com partially shares its NS delegation with several other domains, including kra27-at.cc, uqr.to, client9.me and two others.

These name servers often co-occur with the name servers kevin.ns.cloudflare.com.

Host names with 6 IP numbers:

rob.ns.cloudflare.com resolves to 108.162.193.140, 172.64.33.140, 173.245.59.140 and 3 other IP addresses.

robin.ns.cloudflare.com resolves to 108.162.192.218, 172.64.32.218, 173.245.58.218 and 3 other IP addresses.

Mail Servers

duplexcsa.com has two mail servers: d205275.a.ess.uk.barracudanetworks.com and d205275.b.ess.uk.barracudanetworks.com.

d205275.a.ess.uk.barracudanetworks.com and d205275.b.ess.uk.barracudanetworks.com each resolve to three IP addresses — 18.133.136.186, 18.133.136.187 and 18.133.136.188 — sharing the same set.

d205275.a.ess.uk.barracudanetworks.com and d205275.b.ess.uk.barracudanetworks.com are host names that each point to 18.133.136.186 IP addresses.

d205275.a.ess.uk.barracudanetworks.com and d205275.b.ess.uk.barracudanetworks.com are host names that each point to 18.133.136.187 IP addresses.

d205275.a.ess.uk.barracudanetworks.com and d205275.b.ess.uk.barracudanetworks.com are host names that each point to 18.133.136.188 IP addresses.