problemsets.com - dns.ninja
problemsets.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 207.148.248.143🇺🇸 EIG-29873207.148.248.0/24 | ||||||
| NS | ns.buydomains.com ⚠️ Not in zone NS records | ||||||
| A | 52.20.26.87🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-52-20-26-87.compute-1.amazonaws.com | ||||||
| NS | this-domain-for-sale.com ⚠️ Not in zone NS records | ||||||
| A | 52.20.26.87🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-52-20-26-87.compute-1.amazonaws.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=1786629579 | ||||||
Same first word
problemsets.com |
Similar names
DNS History
4 records (3 active, 1 former)
●NSns.buydomains.com2026-03-24 → 2026-08-13 · 2 obs
● 2026-08-13 14:15:50
●NSthis-domain-for-sale.com2026-03-24 → 2026-08-13 · 2 obs
● 2026-08-13 14:15:50
●A207.148.248.1432015-10-26 → 2026-08-13 · 6 obs
● 2015-10-26 09:09:10
● 2017-01-19 07:15:30
○ 2026-07-16 17:01:48
● 2026-08-13 06:27:26
● 2026-08-13 14:15:50
○A66.151.181.492015-06-08 → 2015-06-08 · 3 obs
○ 2015-10-26 09:09:10
○ 2026-08-13 14:15:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| problemsets.com | ns.buydomains.com, this-domain-for-sale.com | 2 records |
✅ Authoritative Response
Server:52.4.207.204
NS records: ns.buydomains.com, this-domain-for-sale.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for problemsets.com (unsigned zone)
⏱️ Timing
Total: 1578ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 207.148.248.143 |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns.buydomains.com, this-domain-for-sale.com)
Analysis
IP Addresses
problemsets.com points to a single IP number: 207.148.248.143.
Additional host names — xeanar.com, mathcrew.com, streethymns.com and two others — share IP numbers with problemsets.com.
Name Servers
The NS records for problemsets.com delegate to this-domain-for-sale.com and ns.buydomains.com.
problemsets.com shares its name server setup with other domains, including decisivetraining.com, msanchez.com, lexidius.com and two others.
problemsets.com has some name servers in common with other domains such as tomatogirl.com, tydil.com and ivevents.com
It is common to find these name servers paired with the name servers ns2.buydomains.com.
Each of this-domain-for-sale.com and ns.buydomains.com points to exactly one IP address: 52.20.26.87.
this-domain-for-sale.com and ns.buydomains.com each have 52.20.26.87 IP addresses.