concurrent.systems - robtex.com

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

concurrent.systems

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:2780🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:914c🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.39.128Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.145.76🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSalexis.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b3c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRalexis.ns.cloudflare.com
A2803:f800:50::6ca2:c13c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRalexis.ns.cloudflare.com
A2a06:98c1:50::ac40:213c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRalexis.ns.cloudflare.com
A108.162.193.60🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRalexis.ns.cloudflare.com
A172.64.33.60🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRalexis.ns.cloudflare.com
A173.245.59.60🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRalexis.ns.cloudflare.com
NSmelissa.ns.cloudflare.com
A2606:4700:50::adf5:3ac7🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
A2803:f800:50::6ca2:c0c7🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmelissa.ns.cloudflare.com
A2a06:98c1:50::ac40:20c7🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmelissa.ns.cloudflare.com
A108.162.192.199🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
A172.64.32.199🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
A173.245.58.199🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c27::1b🇺🇸 Google2607:f8b0:4004::/48
PTRyuiadsk-in-f27.1e100.net
A172.253.63.26🇺🇸 Google172.253.63.0/24
PTRbi-in-f26.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c14::1b🇨🇱 Google2800:3f0:4003::/48
A192.178.234.27🇺🇸 Google192.178.0.0/15
PTRncsclj-in-f27.1e100.net
MXalt2.aspmx.l.google.com(5)
A2a00:1450:400b:c02::1a🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f26.1e100.net
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
MXalt3.aspmx.l.google.com(10)
A2a00:1450:4009:c0f::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f26.1e100.net
A192.178.223.26🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f26.1e100.net
MXalt4.aspmx.l.google.com(10)
A2a00:1450:400c:c23::1b🇧🇪 Google2a00:1450:400c::/48
PTRyubrupd-in-f27.1e100.net
A172.253.157.26🇺🇸 Google172.253.0.0/16
PTRyubrupd-in-f26.1e100.net
TXTMS=ms85293956
TXTa9qwDHY4SCa4zB5kyAxvDseDlzw=
TXTgoogle-site-verification=B1Z5bNaR03LX9_C0MGBAyy8KJVo_ng7DnUgV2vV3BdY
TXTgoogle-site-verification=ii_AvLhNLPhMiAPhNc9JD57xA81qOHW2dNv5Spy6x-w
TXTgoogle-site-verification=laF4aIXK0VF4zObRdhGkA5Cx8S5IkDGjbpg4pekUGR4
TXTv=spf1 include:_spf.google.com include:_spf.concurrent.systems ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.39.128, 172.67.145.76
IPv6 hints2606:4700:3032::6815:2780, 2606:4700:3033::ac43:914c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=23, name=cloudflare-ech.com
SOAalexis.ns.cloudflare.comdns@cloudflare.com serial=2411194650

systems

DNSSEC🔒 Signed (DS record present)
NSv0n0.nic.systems ⭐
NSv0n1.nic.systems
NSv0n2.nic.systems
NSv0n3.nic.systems
NSv2n0.nic.systems
NSv2n1.nic.systems
SOAv0n0.nic.systemshostmaster@donuts.email serial=1787210451

Same first word

concurrent.team
concurrent.net
concurrent.biz
concurrent.systems
concurrent.org
concurrent.co
concurrent.dk
concurrent.eu
concurrent.world
concurrent.jp
concurrent.ca
concurrent.in
concurrent.tech
concurrent.com
concurrent.be
concurrent.workers.dev
concurrent.co.za
concurrent.ch
concurrent.fr
concurrent.co.uk
concurrent.work

Similar names

currentcon.com
rurconnect.de
truconnecr.com

Previous names

comsec.systems
comstar.systems
comsysco.systems
comtech.systems
conc.systems
concat.systems
concave.systems
concentric.systems
concept.systems
concept3.systems
conceptev.systems
conceptpro.systems
conceptsystemsengineering.systems
conceptual.systems
conceptualcreative.systems
concert.systems
conclusive.systems
conco.systems
concourse.systems
concrete.systems

Next names

condition-monitoring.systems
condition.systems
condoo.systems
conductor.systems
conecta.systems
conexed.systems
conexia.systems
conexus.systems
conference.systems
conferenceconnect.systems
conferencing.systems
confianza.systems
configurable.systems
configurationmanager.systems
configure.systems
confirm-verification-process.systems
confluencia.systems
congruent.systems
conmod.systems
connect.systems

DNS History

19 records (11 active, 8 former)

2017201820192020202120222023202420252026NSalexis.ns.cloudflare.commelissa.ns.cloudflare.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comaspmx.l.google.comA104.21.39.128172.67.145.762606:4700:3032::6815:27802606:4700:3033::ac43:914c104.18.36.106104.18.37.106188.114.96.0188.114.97.02400:cb00:2048:1::6812:246a2400:cb00:2048:1::6812:256a2a06:98c1:3120::2a06:98c1:3121::
●NSalexis.ns.cloudflare.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
●NSmelissa.ns.cloudflare.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
●MXalt1.aspmx.l.google.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
●MXalt2.aspmx.l.google.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
●MXalt3.aspmx.l.google.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
●MXalt4.aspmx.l.google.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
●MXaspmx.l.google.com2016-12-10 → 2026-08-20 · 2 obs
● 2016-12-10 20:46:36
● 2026-08-20 08:16:48
○A104.18.36.1062016-12-10 → 2017-10-16 · 4 obs
● 2016-12-10 20:46:36
● 2017-10-16 22:21:12
○ 2026-08-17 16:46:40
○ 2026-08-20 08:16:48
○A104.18.37.1062016-12-10 → 2017-10-16 · 4 obs
● 2016-12-10 20:46:36
● 2017-10-16 22:21:12
○ 2026-08-17 16:46:40
○ 2026-08-20 08:16:48
●A104.21.39.1282026-08-20 → 2026-08-20 · 3 obs
○ 2026-08-17 16:46:40
● 2026-08-20 03:15:08
● 2026-08-20 08:16:48
●A172.67.145.762026-08-20 → 2026-08-20 · 3 obs
○ 2026-08-17 16:46:40
● 2026-08-20 03:15:08
● 2026-08-20 08:16:48
○A188.114.96.02026-08-17 → 2026-08-17 · 4 obs
○ 2017-10-16 22:21:12
● 2026-08-17 16:46:40
○ 2026-08-20 03:15:08
○ 2026-08-20 08:16:48
○A188.114.97.02026-08-17 → 2026-08-17 · 4 obs
○ 2017-10-16 22:21:12
● 2026-08-17 16:46:40
○ 2026-08-20 03:15:08
○ 2026-08-20 08:16:48
○A2400:cb00:2048:1::6812:246a2016-12-10 → 2017-10-16 · 4 obs
● 2016-12-10 20:46:36
● 2017-10-16 22:21:12
○ 2026-08-17 16:46:40
○ 2026-08-20 08:16:48
○A2400:cb00:2048:1::6812:256a2016-12-10 → 2017-10-16 · 4 obs
● 2016-12-10 20:46:36
● 2017-10-16 22:21:12
○ 2026-08-17 16:46:40
○ 2026-08-20 08:16:48
●A2606:4700:3032::6815:27802026-08-20 → 2026-08-20 · 3 obs
○ 2026-08-17 16:46:40
● 2026-08-20 03:15:08
● 2026-08-20 08:16:48
●A2606:4700:3033::ac43:914c2026-08-20 → 2026-08-20 · 3 obs
○ 2026-08-17 16:46:40
● 2026-08-20 03:15:08
● 2026-08-20 08:16:48
○A2a06:98c1:3120::2026-08-17 → 2026-08-17 · 4 obs
○ 2017-10-16 22:21:12
● 2026-08-17 16:46:40
○ 2026-08-20 03:15:08
○ 2026-08-20 08:16:48
○A2a06:98c1:3121::2026-08-17 → 2026-08-17 · 4 obs
○ 2017-10-16 22:21:12
● 2026-08-17 16:46:40
○ 2026-08-20 03:15:08
○ 2026-08-20 08:16:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
systemsv0n0.nic.systems, v0n2.nic.systems, v2n0.nic.systems, v0n1.nic.systems...12 records
concurrent.systemsmelissa.ns.cloudflare.com, alexis.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.59.60

NS records: melissa.ns.cloudflare.com, alexis.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for concurrent.systems (unsigned zone)

⏱️ Timing

Total: 746ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.145.76, 104.21.39.128
AAAA22606:4700:3032::6815:2780, 2606:4700:3033::ac43:914c
NS2alexis.ns.cloudflare.com, melissa.ns.cloudflare.com
MX5aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...
TXT6MS=ms85293956, a9qwDHY4SCa4zB5kyAxvDseDlzw=...
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1alexis.ns.cloudflare.com dns.cloudflare.

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.systems, v0n0.nic.systems, v0n2.nic.systems...)

Analysis

IP Addresses

concurrent.systems has four IP addresses: 104.21.39.128, 172.67.145.76, 2606:4700:3032::6815:2780 and 2606:4700:3033::ac43:914c.

Additional host names — z3z34.com, ajm789.xyz, teraabox.com and two others — share IP numbers with concurrent.systems.

Name Servers

concurrent.systems has two authoritative name servers — alexis.ns.cloudflare.com and melissa.ns.cloudflare.com.

concurrent.systems shares its name server setup with other domains, including cruisebosphorus.com, ecoiffierjouetssoldes.com, elajambo.com and two others.

concurrent.systems shares at least some of its name servers with other domains, including locked.es, definedlogic.com, burza-put.com and two others.

These name servers are frequently paired with the name servers ajay.ns.cloudflare.com, devin.ns.cloudflare.com and lila.ns.cloudflare.com.

Host names with 6 IP numbers:

alexis.ns.cloudflare.com points to 108.162.193.60, 172.64.33.60, 173.245.59.60 and 3 other IP addresses.

melissa.ns.cloudflare.com points to 108.162.192.199, 172.64.32.199, 173.245.58.199 and 3 other IP addresses.

Mail Servers

Mail for concurrent.systems is handled by five mail servers, namely aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

concurrent.systems shares mail servers — at least in part — with other domains, including zewar.co, allrecipes.nl, zalva.com and two others.

These mail servers are frequently used alongside mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 other.

Host names with two IP numbers:

aspmx.l.google.com resolves to 172.253.63.26 and 2607:f8b0:4004:c27::1b.

alt1.aspmx.l.google.com resolves to 192.178.234.27 and 2800:3f0:4003:c14::1b.

alt2.aspmx.l.google.com resolves to 172.253.116.26 and 2a00:1450:400b:c02::1a.

alt3.aspmx.l.google.com resolves to 192.178.223.26 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com resolves to 172.253.157.26 and 2a00:1450:400c:c23::1b.