concurrent.co - dns.ninja
concurrent.co
co
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.registrydns.co | ||||||
| NS | b.registrydns.co | ||||||
| NS | c.registrydns.co | ||||||
| NS | d.registrydns.co | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=1759728590 | ||||||
Same first word
Similar names
DNS History
14 records (9 active, 5 former)
●NSdns1.registrar-servers.com2026-02-25 → 2026-08-09 · 3 obs
● 2026-02-25 20:18:56
● 2026-08-09 07:13:16
●NSdns2.registrar-servers.com2026-02-25 → 2026-08-09 · 3 obs
● 2026-02-25 20:18:56
● 2026-08-09 07:13:16
○NSns0.lcn.com2015-07-04 → 2016-05-07 · 4 obs
● 2016-05-07 06:40:32
○ 2026-02-25 20:18:56
○ 2026-08-09 07:13:16
○NSns1.lcn.com2015-07-04 → 2016-05-07 · 4 obs
● 2016-05-07 06:40:32
○ 2026-02-25 20:18:56
○ 2026-08-09 07:13:16
●MXalt1.aspmx.l.google.com2015-07-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:13:16
●MXalt2.aspmx.l.google.com2015-07-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:13:16
●MXaspmx.l.google.com2015-07-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:13:16
●MXaspmx2.googlemail.com2015-07-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:13:16
●MXaspmx3.googlemail.com2015-07-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:13:16
○MXaspmx4.googlemail.com2015-07-04 → 2016-05-07 · 4 obs
● 2016-05-07 06:40:32
○ 2026-02-25 20:18:56
○ 2026-08-09 07:13:16
○MXaspmx5.googlemail.com2015-07-04 → 2016-05-07 · 4 obs
● 2016-05-07 06:40:32
○ 2026-02-25 20:18:56
○ 2026-08-09 07:13:16
○A109.108.142.1342015-07-04 → 2016-05-07 · 4 obs
● 2016-05-07 06:40:32
○ 2026-02-25 20:18:56
○ 2026-08-09 07:13:16
●A141.193.213.102026-02-25 → 2026-08-09 · 3 obs
● 2026-02-25 20:18:56
● 2026-08-09 07:13:16
●A141.193.213.112026-02-25 → 2026-08-09 · 3 obs
● 2026-02-25 20:18:56
● 2026-08-09 07:13:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | b.registrydns.co, c.registrydns.co, d.registrydns.co, a.registrydns.co | - |
| concurrent.co | dns1.registrar-servers.com, dns2.registrar-servers.com | - |
✅ Authoritative Response
Server:156.154.132.200
NS records: dns1.registrar-servers.com, dns2.registrar-servers.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for concurrent.co (unsigned zone)
⏱️ Timing
Total: 189ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 141.193.213.11, 141.193.213.10 |
| NS | 2 | dns1.registrar-servers.com, dns2.registrar-servers.com |
| MX | 5 | aspmx.l.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 5)... |
| TXT | 3 | v=spf1 include:_spf.google.com ~all, google-gws-recovery-domain-verification=... |
| SOA | 1 | dns1.registrar-servers.com hostmaster.re |
Analysis
IP Addresses
concurrent.co has two IP addresses: 141.193.213.10 and 141.193.213.11
Additional host names — heritagestoneonline.com, corenalaw.com, americanfoamrubber.com and two others — share IP numbers with concurrent.co.
Name Servers
DNS delegation for concurrent.co points to two name servers: dns1.registrar-servers.com and dns2.registrar-servers.com.
concurrent.co shares its name server setup with other domains, including thompth.com, notablyliteratemuskrat.shop, clickacontractor.com and two others.
At least some of concurrent.co's name servers are shared with other domains, for example kawatmelon.com and cncresolutions.ca.
dns1.registrar-servers.com directs to 156.154.132.200 and 2610:a1:1024::200. dns2.registrar-servers.com directs to 156.154.133.200 and 2610:a1:1025::200. Each host name carries two IP addresses.
Mail Servers
Five mail servers handle concurrent.co: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
concurrent.co shares mail servers — at least in part — with other domains, including ns500734.ns500699.ns500699.ns500699.ns500699.ns500699.ns500734.ns500588.ns500588.ns500588.ns500699.ns500693.ns500699.ns500110.dtrkdll.com, lilith.fi, ns500758.ns500758.ns500759.ns500735.ns500698.ns500736.ns500576.ns500698.ns500619.ns500576.ns500576.trackreceptor.com and two others.
These mail servers are frequently used alongside mail servers alt2.aspmx.l.google.com, alt1.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 other.
Host names with two IP numbers:
aspmx2.googlemail.com has two IP addresses: 192.178.234.26 and 2800:3f0:4003:c14::1b.
aspmx3.googlemail.com has two IP addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.
aspmx.l.google.com has two IP addresses: 172.253.115.27 and 2607:f8b0:4004:c17::1b.
alt1.aspmx.l.google.com has two IP addresses: 192.178.234.26 and 2800:3f0:4003:c14::1b.
alt2.aspmx.l.google.com has two IP addresses: 172.253.116.26 and 2a00:1450:400b:c02::1b.
Host names pointing to 2800:3f0:4003:c14::1b IP addresses: aspmx2.googlemail.com and alt1.aspmx.l.google.com.
Host names pointing to 192.178.234.26 IP addresses: aspmx2.googlemail.com and alt1.aspmx.l.google.com.
Host names pointing to 2a00:1450:400b:c02::1b IP addresses: aspmx3.googlemail.com and alt2.aspmx.l.google.com.