21stsupport.com - robtex.com
21stsupport.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dbru.br.ns.els-gms.att.net ⚠️ Not in zone NS records | ||||||
| A | 2001:1890:1ff:9f0:68:94:156:134🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC | ||||||
| PTR | dbru.br.ns.els-gms.att.net | ||||||
| A | 68.94.156.134🇺🇸 AS701868.88.0.0/13 ARIN Allocation SBC Internet Services | ||||||
| PTR | dbru.br.ns.els-gms.att.net | ||||||
| NS | dmtu.mt.ns.els-gms.att.net ⚠️ Not in zone NS records | ||||||
| A | 2001:1890:1ff:9f1:99:99:99:134🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC | ||||||
| PTR | dmtu.mt.ns.els-gms.att.net | ||||||
| A | 99.99.99.134🇺🇸 AS701899.96.0.0/13 AT&T Enterprises, LLC | ||||||
| PTR | dmtu.mt.ns.els-gms.att.net | ||||||
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=1774378472 | ||||||
Same first word
21stsupport.com |
DNS History
5 records (2 active, 3 former)
●NSdbru.br.ns.els-gms.att.net2015-06-29 → 2026-03-24 · 2 obs
● 2026-03-24 18:57:56
●NSdmtu.mt.ns.els-gms.att.net2015-06-29 → 2026-03-24 · 2 obs
● 2026-03-24 18:57:56
○NSns1.21st.com2015-06-29 → 2017-03-21 · 4 obs
● 2017-03-21 07:09:44
○ 2026-03-07 02:12:20
○ 2026-03-24 18:57:56
○MXsmtp3.farmersinsurance.com2015-06-29 → 2017-03-21 · 4 obs
● 2017-03-21 07:09:44
○ 2026-03-07 02:12:20
○ 2026-03-24 18:57:56
○A66.151.255.912015-06-29 → 2017-03-21 · 4 obs
● 2017-03-21 07:09:44
○ 2026-03-07 02:12:20
○ 2026-03-24 18:57:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| 21stsupport.com | dbru.br.ns.els-gms.att.net, dmtu.mt.ns.els-gms.att.net | - |
✅ Authoritative Response
Server:68.94.156.134
NS records: dbru.br.ns.els-gms.att.net, dmtu.mt.ns.els-gms.att.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21stsupport.com (unsigned zone)
⏱️ Timing
Total: 280ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
21stsupport.com is delegated to two name servers: dbru.br.ns.els-gms.att.net and dmtu.mt.ns.els-gms.att.net.
21stsupport.com uses the same name server setup as other domains, for instance 4.219.167.in-addr.arpa, permaregistry.com, 20.144.12.in-addr.arpa, beriplast.de and 23.185.12.in-addr.arpa.
21stsupport.com shares name servers with other domains at least partially, for instance vwr.net, ip.att.net, hosystems.com, ramada.be and 3.0.12.in-addr.arpa.
these name servers are commonly used with the name servers cmtu.mt.ns.els-gms.att.net, cbru.br.ns.els-gms.att.net, b23.ns.els-gms.att.net, m23.ns.els-gms.att.net, dnsmgr3.level3.net, ns19.customer.level3.net, ns24.customer.level3.net, ns9.customer.level3.net, ns3.level3.net and ns4.level3.net.
Host names with two IP numbers:
The host dbru.br.ns.els-gms.att.net points to 2001:1890:1ff:9f0:68:94:156:134 and 68.94.156.134.
The host dmtu.mt.ns.els-gms.att.net points to 2001:1890:1ff:9f1:99:99:99:134 and 99.99.99.134.