doubleu.com - dns.ninja
doubleu.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=1786706799 | ||||||
Subdomains
Same first word
Similar names
DNS History
11 records (10 active, 1 former)
●NSns1.dn(0x736578)it.com2015-06-08 → 2026-08-14 · 7 obs
● 2016-01-21 13:03:00
○ 2016-04-19 04:01:16
● 2016-11-17 07:05:30
○ 2016-12-01 01:56:38
● 2018-01-02 03:08:06
● 2026-08-14 11:48:40
●NSns2.dn(0x736578)it.com2015-06-08 → 2026-08-14 · 5 obs
● 2016-04-19 04:01:16
○ 2016-11-17 07:05:30
● 2016-12-01 01:56:38
● 2026-08-14 11:48:40
●NSns3.dn(0x736578)it.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
●NSns4.dn(0x736578)it.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
●MXalt1.aspmx.l.google.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
●MXalt2.aspmx.l.google.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
●MXaspmx.l.google.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
●MXaspmx2.googlemail.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
●MXaspmx3.googlemail.com2015-06-08 → 2026-08-14 · 2 obs
● 2026-08-14 11:48:40
○A50.196.133.892015-06-08 → 2018-01-02 · 4 obs
● 2018-01-02 03:08:06
○ 2026-02-15 00:22:32
○ 2026-08-14 11:48:40
●A99.36.166.2532026-02-15 → 2026-08-14 · 3 obs
● 2026-02-15 00:22:32
● 2026-08-14 11:48:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| doubleu.com | ns2.dn(0x736578)it.com, ns1.dn(0x736578)it.com | 2 records |
✅ Authoritative Response
Server:173.208.164.34
NS records: ns2.dn(0x736578)it.com, ns1.dn(0x736578)it.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for doubleu.com (unsigned zone)
⏱️ Timing
Total: 364ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 99.36.166.253 |
| NS | 4 | ns4.dn(0x736578)it.com, ns1.dn(0x736578)it.com... |
| MX | 5 | aspmx3.googlemail.com (pri: 10), alt2.aspmx.l.google.com (pri: 5)... |
| TXT | 1 | google-site-verification=g1FLuraTGUtluY6 |
| SOA | 1 | ns1.dn(0x736578)it.com admin.netdorm.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.dn(0x736578)it.com, ns1.dn(0x736578)it.com)
Analysis
Hierarchy
doubleu.com sits above mail.doubleu.com, comcast.doubleu.com and ca.doubleu.com in the domain hierarchy.
IP Addresses
doubleu.com resolves to just one IP address, 99.36.166.253.
Two other host names, along with mail.getenv.com, mail.putenv.com and sighup.com, also share IP numbers with doubleu.com.
Name Servers
The NS records for doubleu.com point to four name servers: ns1.dn(0x736578)it.com, ns2.dn(0x736578)it.com, ns3.dn(0x736578)it.com and ns4.dn(0x736578)it.com.
There is at least partial name server overlap between doubleu.com and other domains — tinhkhongphapngu.net, peternunes.net, ewingfx.com and two more among them.
These name servers are routinely deployed together with the name servers pm1.dn(0x736578)it.com.
The hosts ns1.dn(0x736578)it.com, ns2.dn(0x736578)it.com, ns3.dn(0x736578)it.com and ns4.dn(0x736578)it.com all resolve to exactly one IP address each: 31.14.40.88, 173.208.164.34, 204.12.192.106 and 107.150.58.186 respectively.
Mail Servers
doubleu.com has five mail servers, which are aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
There is at least a partial MX overlap between doubleu.com and other domains, including ns500599.ns500599.ns500724.ns500737.ns500599.ns500599.ns500599.ns500599.ns500737.ns500737.ns500669.ns500669.yummyflingsfinder.com, ns500754.ns500754.ns500671.ns500731.ns500731.ns500688.ns500688.ns500705.ns500705.ns500678.ns500678.ns500671.lusty(0x736c7574)z.com, johnwinter.com and two others.
These mail servers tend to appear in combination with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.
Host names that have two IP addresses:
aspmx2.googlemail.com resolves to two addresses: 192.178.234.26 and 2800:3f0:4003:c14::1a.
aspmx3.googlemail.com resolves to two addresses: 172.253.116.26 and 2a00:1450:400b:c02::1b.
aspmx.l.google.com resolves to two addresses: 142.250.31.27 and 2607:f8b0:4004:c06::1a.
alt1.aspmx.l.google.com resolves to two addresses: 192.178.234.26 and 2800:3f0:4003:c14::1a.
alt2.aspmx.l.google.com resolves to two addresses: 172.253.116.26 and 2a00:1450:400b:c02::1a.
aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 2800:3f0:4003:c14::1a IP addresses.
aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 192.178.234.26 IP addresses.
aspmx3.googlemail.com along with alt2.aspmx.l.google.com each resolve to 172.253.116.26 IP addresses.