concentricu.com - robtex.com

concentricu.com

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:ecd🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:a08c🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.14.205Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.160.140🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSjames.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3bb2🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjames.ns.cloudflare.com
A2803:f800:50::6ca2:c1b2🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRjames.ns.cloudflare.com
A2a06:98c1:50::ac40:21b2🇺🇸 Cloudflare2a06:98c1:50::/45
PTRjames.ns.cloudflare.com
A108.162.193.178🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjames.ns.cloudflare.com
A172.64.33.178🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjames.ns.cloudflare.com
A173.245.59.178🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjames.ns.cloudflare.com
NSrita.ns.cloudflare.com
A2606:4700:50::adf5:3a8c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
A2803:f800:50::6ca2:c08c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrita.ns.cloudflare.com
A2a06:98c1:50::ac40:208c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrita.ns.cloudflare.com
A108.162.192.140🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
A172.64.32.140🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
A173.245.58.140🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.14.205, 172.67.160.140
IPv6 hints2606:4700:3031::6815:ecd, 2606:4700:3031::ac43:a08c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=211, name=cloudflare-ech.com
SOAjames.ns.cloudflare.comdns@cloudflare.com serial=2400772064

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=1775983122

Same first word

concentricu.com

DNS History

10 records (6 active, 4 former)

20162017201820192020202120222023202420252026NSjames.ns.cloudflare.comrita.ns.cloudflare.comns33.domaincontrol.comns34.domaincontrol.comMXconcentricu-com.mail.protection.outlook.comA104.21.14.205172.67.160.1402606:4700:3031::6815:ecd2606:4700:3031::ac43:a08c168.61.36.252
●NSjames.ns.cloudflare.com2026-02-24 → 2026-04-12 · 3 obs
○ 2020-03-04 02:58:58
● 2026-02-24 21:09:10
● 2026-04-12 09:00:52
○NSns33.domaincontrol.com2015-07-04 → 2020-03-04 · 4 obs
● 2015-07-04 08:12:12
● 2020-03-04 02:58:58
○ 2026-02-24 21:09:10
○ 2026-04-12 09:00:52
○NSns34.domaincontrol.com2015-07-04 → 2020-03-04 · 4 obs
● 2015-07-04 08:12:12
● 2020-03-04 02:58:58
○ 2026-02-24 21:09:10
○ 2026-04-12 09:00:52
●NSrita.ns.cloudflare.com2026-02-24 → 2026-04-12 · 3 obs
○ 2020-03-04 02:58:58
● 2026-02-24 21:09:10
● 2026-04-12 09:00:52
○MXconcentricu-com.mail.protection.outlook.com2015-07-04 → 2020-03-04 · 4 obs
● 2015-07-04 08:12:12
● 2020-03-04 02:58:58
○ 2026-02-24 21:09:10
○ 2026-04-12 09:00:52
●A104.21.14.2052026-02-24 → 2026-04-12 · 3 obs
○ 2020-03-04 02:58:58
● 2026-02-24 21:09:10
● 2026-04-12 09:00:52
○A168.61.36.2522015-07-04 → 2020-03-04 · 4 obs
● 2015-07-04 08:12:12
● 2020-03-04 02:58:58
○ 2026-02-24 21:09:10
○ 2026-04-12 09:00:52
●A172.67.160.1402026-02-24 → 2026-04-12 · 3 obs
○ 2020-03-04 02:58:58
● 2026-02-24 21:09:10
● 2026-04-12 09:00:52
●A2606:4700:3031::6815:ecd2026-02-24 → 2026-04-12 · 3 obs
○ 2020-03-04 02:58:58
● 2026-02-24 21:09:10
● 2026-04-12 09:00:52
●A2606:4700:3031::ac43:a08c2026-02-24 → 2026-04-12 · 3 obs
○ 2020-03-04 02:58:58
● 2026-02-24 21:09:10
● 2026-04-12 09:00:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comi.gtld-servers.net, e.gtld-servers.net, g.gtld-servers.net, a.gtld-servers.net...-
concentricu.comrita.ns.cloudflare.com, james.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.178

NS records: rita.ns.cloudflare.com, james.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for concentricu.com (unsigned zone)

⏱️ Timing

Total: 185ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.160.140, 104.21.14.205
AAAA22606:4700:3031::6815:ecd, 2606:4700:3031::ac43:a08c
NS2james.ns.cloudflare.com, rita.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1james.ns.cloudflare.com dns.cloudflare.c

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

Four IP numbers are pointed to by concentricu.com: 2606:4700:3031::6815:ecd, 2606:4700:3031::ac43:a08c, 104.21.14.205 and 172.67.160.140.

other host names including ichip.net, yorkcityfootballclub.co.uk, 50ag.buzz, bizcredit.guru and qinblog.com share IP numbers with concentricu.com.

Name Servers

concentricu.com is delegated to two name servers james.ns.cloudflare.com and rita.ns.cloudflare.com.

concentricu.com shares the same name server setup as other domains, for instance scayscanner.ru, blueembertech.net, advertising-inc.com, bookumy.com and aeroflotbonus15.ru.

concentricu.com at least partially shares name servers with other domains, for instance tpysh.com, jackpot182xjp.online, mdg188jp9.online, kronigs.com and buildingsurveyorportsmouth.com.

these name servers are commonly used alongside vivienne.ns.cloudflare.com.

Host names with six IP numbers:

Host name james.ns.cloudflare.com points to: 2606:4700:58::adf5:3bb2, 2803:f800:50::6ca2:c1b2, 2a06:98c1:50::ac40:21b2, 108.162.193.178, 172.64.33.178 and 173.245.59.178.

Host name rita.ns.cloudflare.com points to: 2606:4700:50::adf5:3a8c, 2803:f800:50::6ca2:c08c, 2a06:98c1:50::ac40:208c, 108.162.192.140, 172.64.32.140 and 173.245.58.140.