courselab.net - robtex.com
courselab.net
| 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 | 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 | ||||||
| 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 | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns1.afternic.comdns@jomax.net serial=1 | ||||||
net
| 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=1774701127 | ||||||
Previously MX for
courselab.net |
Same first word
Similar names
DNS History
10 records (4 active, 6 former)
●NSns1.afternic.com2026-03-13 → 2026-03-28 · 3 obs
● 2026-03-13 12:35:02
● 2026-03-28 12:40:10
○NSns1.systemdns.com2015-08-09 → 2020-01-17 · 4 obs
● 2020-01-17 06:34:00
○ 2026-03-13 12:35:02
○ 2026-03-28 12:40:10
●NSns2.afternic.com2026-03-13 → 2026-03-28 · 3 obs
● 2026-03-13 12:35:02
● 2026-03-28 12:40:10
○NSns2.systemdns.com2015-08-09 → 2020-01-17 · 4 obs
● 2020-01-17 06:34:00
○ 2026-03-13 12:35:02
○ 2026-03-28 12:40:10
○NSns3.systemdns.com2015-08-09 → 2020-01-17 · 4 obs
● 2020-01-17 06:34:00
○ 2026-03-13 12:35:02
○ 2026-03-28 12:40:10
○MXcourselab.net2015-08-09 → 2020-01-17 · 4 obs
● 2020-01-17 06:34:00
○ 2026-03-13 12:35:02
○ 2026-03-28 12:40:10
●A13.248.169.482026-03-13 → 2026-03-28 · 3 obs
● 2026-03-13 12:35:02
● 2026-03-28 12:40:10
●A76.223.54.1462026-03-13 → 2026-03-28 · 3 obs
● 2026-03-13 12:35:02
● 2026-03-28 12:40:10
○A91.196.124.1272015-12-01 → 2020-01-17 · 5 obs
● 2015-12-01 03:54:00
● 2020-01-17 06:34:00
○ 2026-03-13 12:35:02
○ 2026-03-28 12:40:10
○A94.156.237.2102015-08-09 → 2015-08-09 · 3 obs
○ 2015-12-01 03:54:00
○ 2026-03-28 12:40:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | b.gtld-servers.net, c.gtld-servers.net, m.gtld-servers.net, a.gtld-servers.net... | - |
| courselab.net | ns1.afternic.com, ns2.afternic.com | - |
✅ Authoritative Response
Server:97.74.98.69
NS records: ns1.afternic.com, ns2.afternic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courselab.net (unsigned zone)
⏱️ Timing
Total: 425ms | 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 | ns1.afternic.com dns.jomax.net |
Analysis
IP Addresses
courselab.net resolves to two IP numbers: 13.248.169.48 and 76.223.54.146.
other host names including bandnames.org, psyclass.com, caesariii.com, tuct.org and hoogle.co share IP numbers with courselab.net.
Name Servers
courselab.net is delegated to two name servers ns1.afternic.com and ns2.afternic.com.
courselab.net shares the same name server setup as other domains, for instance hlfx50-1-84.mtt.net, www.cdcl.com, mx.mtep.com, designerfashionbrands.com and megawholesale.com.
courselab.net at least partially shares name servers with other domains, for instance cbfk.com, mail.lilifen.com, coincite.com, robonews.com and htgq.com.
these name servers are commonly used alongside verification-ag3xtxqjhqhiyarqdrht2l.ns101.verify.hn.
Host names with two IP numbers:
The host name ns1.afternic.com points to 2603:5:2126::45 and 97.74.98.69; the host name ns2.afternic.com points to 2603:5:2226::45 and 173.201.66.69.