calc4u.com - robtex.com
calc4u.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 13.248.169.48🇺🇸 Amazon13.248.160.0/20 | ||||||
| PTR | a904c694c05102f30.awsglobalaccelerator.com | ||||||
| A | 76.223.54.146🇺🇸 Amazon76.223.48.0/20 | ||||||
| NS | ns2.afternic.com ⭐ | ||||||
| A | 2603:5:2226::45🇺🇸 GODADDY-DNS2603:5:2220::/44 | ||||||
| PTR | ns2.afternic.com | ||||||
| A | 173.201.66.69🇺🇸 GODADDY-DNS173.201.66.0/23 | ||||||
| PTR | ns2.afternic.com | ||||||
| NS | ns1.afternic.com | ||||||
| A | 2603:5:2126::45🇺🇸 GODADDY-DNS2603:5:2120::/44 | ||||||
| PTR | ns1.afternic.com | ||||||
| A | 97.74.98.69🇺🇸 GODADDY-DNS97.74.98.0/23 | ||||||
| PTR | ns1.afternic.com | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns2.afternic.comdns@jomax.net serial=1 | ||||||
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=1776168862 | ||||||
Same first word
DNS History
12 records (4 active, 8 former)
○NSdns11.netcologne.de2015-08-09 → 2017-07-24 · 5 obs
● 2015-08-09 02:03:44
● 2017-07-24 21:00:56
○ 2026-04-14 01:53:22
○ 2026-04-14 12:44:36
○NSdns12.netcologne.de2015-08-09 → 2017-07-24 · 5 obs
● 2015-08-09 02:03:44
● 2017-07-24 21:00:56
○ 2026-04-14 01:53:22
○ 2026-04-14 12:44:36
○NSdns13.netcologne.de2015-08-09 → 2017-07-24 · 5 obs
● 2015-08-09 02:03:44
● 2017-07-24 21:00:56
○ 2026-04-14 01:53:22
○ 2026-04-14 12:44:36
○NSdns14.netcologne.de2015-08-09 → 2017-07-24 · 5 obs
● 2015-08-09 02:03:44
● 2017-07-24 21:00:56
○ 2026-04-14 01:53:22
○ 2026-04-14 12:44:36
●NSns1.afternic.com2026-04-14 → 2026-04-14 · 3 obs
● 2026-04-14 01:53:22
● 2026-04-14 12:44:36
●NSns2.afternic.com2026-04-14 → 2026-04-14 · 3 obs
● 2026-04-14 01:53:22
● 2026-04-14 12:44:36
○NSns77.domaincontrol.com2026-04-14 → 2026-04-14 · 2 obs
○ 2026-04-14 12:44:36
○NSns78.domaincontrol.com2026-04-14 → 2026-04-14 · 2 obs
○ 2026-04-14 12:44:36
●A13.248.169.482026-04-14 → 2026-04-14 · 2 obs
● 2026-04-14 12:44:36
○A13.248.213.452026-04-14 → 2026-04-14 · 2 obs
○ 2026-04-14 12:44:36
●A76.223.54.1462026-04-14 → 2026-04-14 · 2 obs
● 2026-04-14 12:44:36
○A76.223.67.1892026-04-14 → 2026-04-14 · 2 obs
○ 2026-04-14 12:44:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net... | - |
| calc4u.com | ns1.afternic.com, ns2.afternic.com | 4 records |
✅ Authoritative Response
Server:173.201.66.69
NS records: ns1.afternic.com, ns2.afternic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for calc4u.com (unsigned zone)
⏱️ Timing
Total: 86ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 76.223.54.146, 13.248.169.48 |
| NS | 2 | ns1.afternic.com, ns2.afternic.com |
| MX | 1 | . (pri: 0) |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | ns2.afternic.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.afternic.com, ns1.afternic.com, ns2.afternic.com...)
Analysis
IP Addresses
calc4u.com resolves to two IP numbers: 13.248.169.48 and 76.223.54.146.
Other host names, for instance (0x796f75706f726e)z.com, lsvoice.com, hairtrepreneur.com, mailno.studiomp.com and www.stepspro.com share IP numbers with calc4u.com.
Name Servers
Two name servers ns1.afternic.com and ns2.afternic.com handle delegation for calc4u.com.
calc4u.com uses the same name server setup as other domains, for example mail.pravdastudios.com, efestival.com, smtp.dynamicpet.net, tlcxmail.lendingconnection.com and lemonlift.com.
calc4u.com partially shares name servers with other domains; examples include megtakaritas.com, cgiserver.com, jiliko.net, rvegas.com and drtelevision.com.
These name servers are often used with the name servers verification-d3jclucsp89ganyqbydeny.ns101.verify.hn and verification-urj2ap2akmgcchkhharttb.ns101.verify.hn.
Host names with two IP numbers:
ns1.afternic.com points to: 2603:5:2126::45 and 97.74.98.69
ns2.afternic.com points to: 2603:5:2226::45 and 173.201.66.69