concurrentonline.com - dns.ninja

`concurrentonline.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:5c98^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:c349^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.92.152^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.195.73^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dimitris.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c06^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dimitris.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c306^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dimitris.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2306^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dimitris.ns.cloudflare.com`
		A	108.162.195.6^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dimitris.ns.cloudflare.com`
		A	162.159.44.6^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dimitris.ns.cloudflare.com`
		A	172.64.35.6^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dimitris.ns.cloudflare.com`
NS	`liv.ns.cloudflare.com`
		A	2606:4700:50::adf5:3abc^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liv.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0bc^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`liv.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20bc^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`liv.ns.cloudflare.com`
		A	108.162.192.188^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liv.ns.cloudflare.com`
		A	172.64.32.188^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liv.ns.cloudflare.com`
		A	173.245.58.188^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liv.ns.cloudflare.com`
MX	`shared084.arvixe.com` ⭐
		A	143.95.159.10^{🇺🇸 EIGI143.95.152.0/21 NF DALLAS Route Object}
			PTR	`shared084.arvixe.com`
TXT	`v=spf1 ip4:143.95.159.10 +a +mx +ip4:143.95.32.194 +include:websitewelcome.co...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.92.152, 172.67.195.73
		IPv6 hints	2606:4700:3033::6815:5c98, 2606:4700:3035::ac43:c349
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=191, name=cloudflare-ech.com
SOA	`dimitris.ns.cloudflare.com`dns@cloudflare.com serial=2407831029

`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=1783056006

Subdomains

mail.concurrentonline.com

Same first word

concurrentonline.com

DNS History

18 records (7 active, 11 former)

●NSdimitris.ns.cloudflare.com2026-05-17 → 2026-07-03 · 3 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
● 2026-07-03 05:24:52

●NSliv.ns.cloudflare.com2026-05-17 → 2026-07-03 · 3 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
● 2026-07-03 05:24:52

○NSns1.arvixeshared.com2017-12-23 → 2026-04-23 · 5 obs

○ 2016-09-20 04:09:00
● 2017-12-23 05:02:44
● 2026-04-23 14:08:36
○ 2026-05-17 06:06:04
○ 2026-07-03 05:24:52

○NSns1.coot.arvixe.com2015-06-09 → 2016-09-20 · 4 obs

● 2015-06-09 15:00:18
● 2016-09-20 04:09:00
○ 2017-12-23 05:02:44
○ 2026-07-03 05:24:52

○NSns2.arvixeshared.com2017-12-23 → 2026-04-23 · 5 obs

○ 2016-09-20 04:09:00
● 2017-12-23 05:02:44
● 2026-04-23 14:08:36
○ 2026-05-17 06:06:04
○ 2026-07-03 05:24:52

○NSns2.coot.arvixe.com2015-06-09 → 2016-09-20 · 4 obs

● 2015-06-09 15:00:18
● 2016-09-20 04:09:00
○ 2017-12-23 05:02:44
○ 2026-07-03 05:24:52

○MXmail.concurrentonline.com2015-06-09 → 2026-04-23 · 4 obs

● 2015-06-09 15:00:18
● 2026-04-23 14:08:36
○ 2026-05-17 06:06:04
○ 2026-07-03 05:24:52

●MXshared084.arvixe.com2026-05-17 → 2026-07-03 · 3 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
● 2026-07-03 05:24:52

●A104.21.92.1522026-07-03 → 2026-07-03 · 3 obs

○ 2026-05-17 06:06:04
● 2026-07-03 05:24:50
● 2026-07-03 05:24:52

○A143.95.66.492017-12-23 → 2026-04-23 · 5 obs

○ 2016-09-20 04:09:00
● 2017-12-23 05:02:44
● 2026-04-23 14:08:36
○ 2026-05-17 06:06:04
○ 2026-07-03 05:24:52

●A172.67.195.732026-07-03 → 2026-07-03 · 3 obs

○ 2026-05-17 06:06:04
● 2026-07-03 05:24:50
● 2026-07-03 05:24:52

○A188.114.96.02026-05-17 → 2026-05-17 · 4 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
○ 2026-07-03 05:24:50
○ 2026-07-03 05:24:52

○A188.114.97.02026-05-17 → 2026-05-17 · 4 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
○ 2026-07-03 05:24:50
○ 2026-07-03 05:24:52

○A198.252.66.1012015-06-09 → 2016-09-20 · 4 obs

● 2015-06-09 15:00:18
● 2016-09-20 04:09:00
○ 2017-12-23 05:02:44
○ 2026-07-03 05:24:52

●A2606:4700:3033::6815:5c982026-07-03 → 2026-07-03 · 3 obs

○ 2026-05-17 06:06:04
● 2026-07-03 05:24:50
● 2026-07-03 05:24:52

●A2606:4700:3035::ac43:c3492026-07-03 → 2026-07-03 · 3 obs

○ 2026-05-17 06:06:04
● 2026-07-03 05:24:50
● 2026-07-03 05:24:52

○A2a06:98c1:3120::2026-05-17 → 2026-05-17 · 4 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
○ 2026-07-03 05:24:50
○ 2026-07-03 05:24:52

○A2a06:98c1:3121::2026-05-17 → 2026-05-17 · 4 obs

○ 2026-04-23 14:08:36
● 2026-05-17 06:06:04
○ 2026-07-03 05:24:50
○ 2026-07-03 05:24:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, a.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
concurrentonline.com	liv.ns.cloudflare.com, dimitris.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.6

NS records: liv.ns.cloudflare.com, dimitris.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for concurrentonline.com (unsigned zone)

⏱️ Timing

Total: 609ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.92.152, 172.67.195.73`
AAAA	2	`2606:4700:3035::ac43:c349, 2606:4700:3033::6815:5c98`
NS	2	`dimitris.ns.cloudflare.com, liv.ns.cloudflare.com`
MX	1	`shared084.arvixe.com (pri: 0)`
TXT	1	`v=spf1 ip4:143.95.159.10 +a +mx +ip4:143`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dimitris.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

mail.concurrentonline.com is delegated beneath concurrentonline.com.

IP Addresses

concurrentonline.com directs to four IP numbers, which are 104.21.92.152, 172.67.195.73, 2606:4700:3033::6815:5c98 and 2606:4700:3035::ac43:c349.

Additional host names — umbler.com.cdn.cloudflare.net, metruyencv.net, webmail.umbler.com.cdn.cloudflare.net and two others — share IP numbers with concurrentonline.com.

Name Servers

The NS records for concurrentonline.com delegate to dimitris.ns.cloudflare.com and liv.ns.cloudflare.com.

concurrentonline.com shares its name server setup with other domains, including morospin.co.de, mintpalhouse.com, axyron.cloud and two others.

There is at least partial name server overlap between concurrentonline.com and other domains — web2fordev.net, (0x736578)damdang.top, naritaairporthotel.com and two more among them.

The name servers june.ns.cloudflare.com, treasure.ns.cloudflare.com and jerome.ns.cloudflare.com are often found in combination with these name servers.

Host names with 6 IP numbers:

dimitris.ns.cloudflare.com maps to 108.162.195.6, 162.159.44.6, 172.64.35.6 and 3 additional IP addresses.

liv.ns.cloudflare.com maps to 108.162.192.188, 172.64.32.188, 173.245.58.188 and 3 additional IP addresses.

Mail Servers

concurrentonline.com has one mail server: shared084.arvixe.com.

concurrentonline.com and other domains — lesyoho.com for instance — share at least some mail servers.

These mail servers are frequently seen alongside the mail servers mail.lesyoho.com.

shared084.arvixe.com resolves to 143.95.159.10 and no other IP number.