understand.com - dns.ninja
understand.com
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.netnstld@verisign-grs.com serial=1784666987 | ||||||
rank #114163 in the tld
📈 Tranco rank: #543,562
PTR for
Subdomains
content-files.understand.com |
player.understand.com |
content.understand.com |
www.understand.com |
smtp2.understand.com |
admin.understand.com |
player-static.understand.com |
statistics.understand.com |
Same first word
Similar names
DNS History
16 records (10 active, 6 former)
○NSdns0.zoneedit.com2015-10-31 → 2017-09-24 · 5 obs
● 2015-10-31 19:49:00
● 2017-09-24 20:36:28
○ 2026-02-15 10:58:10
○ 2026-07-21 20:57:18
○NSdns1.zoneedit.com2015-10-31 → 2017-09-24 · 5 obs
● 2015-10-31 19:49:00
● 2017-09-24 20:36:28
○ 2026-02-15 10:58:10
○ 2026-07-21 20:57:18
○NSdns2.zoneedit.com2015-10-31 → 2017-09-24 · 5 obs
● 2015-10-31 19:49:00
● 2017-09-24 20:36:28
○ 2026-02-15 10:58:10
○ 2026-07-21 20:57:18
●NSns-1427.awsdns-50.org2026-02-15 → 2026-07-21 · 3 obs
● 2026-02-15 10:58:10
● 2026-07-21 20:57:18
●NSns-1613.awsdns-09.co.uk2026-02-15 → 2026-07-21 · 3 obs
● 2026-02-15 10:58:10
● 2026-07-21 20:57:18
●NSns-257.awsdns-32.com2026-02-15 → 2026-07-21 · 3 obs
● 2026-02-15 10:58:10
● 2026-07-21 20:57:18
●NSns-992.awsdns-60.net2026-02-15 → 2026-07-21 · 3 obs
● 2026-02-15 10:58:10
● 2026-07-21 20:57:18
○NSns47.domaincontrol.com2015-08-22 → 2015-10-21 · 4 obs
● 2015-10-21 03:16:32
○ 2015-10-31 19:49:00
○ 2026-07-21 20:57:18
○NSns48.domaincontrol.com2015-08-22 → 2015-10-21 · 4 obs
● 2015-10-21 03:16:32
○ 2015-10-31 19:49:00
○ 2026-07-21 20:57:18
●MXalt1.aspmx.l.google.com2015-08-22 → 2026-07-21 · 2 obs
● 2026-07-21 20:57:18
●MXalt2.aspmx.l.google.com2015-08-22 → 2026-07-21 · 2 obs
● 2026-07-21 20:57:18
●MXaspmx.l.google.com2015-08-22 → 2026-07-21 · 2 obs
● 2026-07-21 20:57:18
●MXaspmx2.googlemail.com2015-08-22 → 2026-07-21 · 2 obs
● 2026-07-21 20:57:18
●MXaspmx3.googlemail.com2015-08-22 → 2026-07-21 · 2 obs
● 2026-07-21 20:57:18
○A216.157.70.1952015-08-22 → 2017-09-24 · 4 obs
● 2017-09-24 20:36:28
○ 2026-02-15 10:58:10
○ 2026-07-21 20:57:18
●A23.227.38.322026-02-15 → 2026-07-21 · 3 obs
● 2026-02-15 10:58:10
● 2026-07-21 20:57:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | k.gtld-servers.net, c.gtld-servers.net, a.gtld-servers.net, e.gtld-servers.net... | - |
| understand.com | ns-257.awsdns-32.com, ns-992.awsdns-60.net, ns-1613.awsdns-09.co.uk, ns-1427.awsdns-50.org | 2 records |
✅ Authoritative Response
Server:205.251.198.77
NS records: ns-257.awsdns-32.com, ns-992.awsdns-60.net, ns-1613.awsdns-09.co.uk, ns-1427.awsdns-50.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for understand.com (unsigned zone)
⏱️ Timing
Total: 884ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 23.227.38.32 |
| NS | 4 | ns-1427.awsdns-50.org, ns-1613.awsdns-09.co.uk... |
| MX | 5 | aspmx.l.google.com (pri: 0), alt1.aspmx.l.google.com (pri: 10)... |
| TXT | 4 | google-site-verification=H1A7QPcRXZiujj-, openai-domain-verification=dv-TggijNi6Zt... |
| SOA | 1 | ns-1427.awsdns-50.org awsdns-hostmaster. |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-257.awsdns-32.com, ns-257.awsdns-32.com)
Analysis
Hierarchy
understand.com is the parent domain of content-files.understand.com, player.understand.com, content.understand.com, www.understand.com, smtp2.understand.com and a few other host names.
IP Addresses
understand.com directs to one IP number, which is 23.227.38.32.
Among the host names that share IP numbers with understand.com are frescobolcarioca.co.uk, centrosantafe.com.mx, luckvill.com and two others.
Name Servers
The domain understand.com is delegated to these four name servers: ns-257.awsdns-32.com, ns-992.awsdns-60.net, ns-1427.awsdns-50.org and ns-1613.awsdns-09.co.uk.
understand.com shares at least some of its name servers with other domains, including travelalacarte.co.uk, kozi.co, novafoods.de and two others.
The host names ns-257.awsdns-32.com, ns-992.awsdns-60.net, ns-1427.awsdns-50.org and ns-1613.awsdns-09.co.uk each resolve to two IP addresses: ns-257.awsdns-32.com resolves to 205.251.193.1 and 2600:9000:5301:100::1; ns-992.awsdns-60.net resolves to 205.251.195.224 and 2600:9000:5303:e000::1; ns-1427.awsdns-50.org resolves to 205.251.197.147 and 2600:9000:5305:9300::1; ns-1613.awsdns-09.co.uk resolves to 205.251.198.77 and 2600:9000:5306:4d00::1.
Mail Servers
Mail for understand.com is handled by five mail servers, namely aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
understand.com shares at least some of its mail servers with other domains — for example lookandfind.me, voltron.com, surfreefs.nl and two more.
It is common to find these mail servers paired with mail servers alt2.aspmx.l.google.com, alt1.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 more.
Hosts with two IP numbers each:
aspmx2.googlemail.com maps to two IP addresses — 108.177.123.27 and 2800:3f0:4003:c0f::1b.
aspmx3.googlemail.com maps to two IP addresses — 172.253.116.27 and 2a00:1450:400b:c02::1b.
aspmx.l.google.com maps to two IP addresses — 192.178.155.27 and 2607:f8b0:4004:c08::1b.
alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1b.
alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.27 and 2a00:1450:400b:c02::1a.
These two host names — aspmx2.googlemail.com and alt1.aspmx.l.google.com — each point to 2800:3f0:4003:c0f::1b IP addresses.
These two host names — aspmx3.googlemail.com and alt2.aspmx.l.google.com — each point to 172.253.116.27 IP addresses.