captcha.net - robtex.com
captcha.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 128.2.172.14🇺🇸 CMU-ROUTER128.2.0.0/16 RR-RC-Expedient-MOH | ||||||
| PTR | web32.srv.cs.cmu.edu | ||||||
| NS | blox-dhcp.net.local.cmu.edu ⭐ | ||||||
| A | 172.19.67.232UNSPECIFIED160.0.0.0/3 | ||||||
| NS | nsauth-ib1.net.cmu.edu | ||||||
| A | 128.2.1.30🇺🇸 CMU-ROUTER128.2.0.0/16 RR-RC-Expedient-MOH | ||||||
| PTR | nsauth-ib1.net.cmu.edu | ||||||
| NS | nsauth-ib2.net.cmu.edu | ||||||
| A | 128.237.148.161🇺🇸 CMU-ROUTER128.237.0.0/16 RR-RC-Expedient-MOH | ||||||
| PTR | nsauth-ib2.net.cmu.edu | ||||||
| SOA | blox-dhcp.net.local.cmu.eduhost-master@andrew.cmu.edu 2017-10-17 #53 | ||||||
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=1778311106 | ||||||
rank #3262 in the tld
WOT: SAFE (94/100)
📈 Tranco rank: #441,388
Subdomains
www.captcha.net |
Same first word
Similar names
cpachat.com |
pcachat.net |
cathcap.com |
capchat.com |
chatcap.com |
chatcpa.com |
cpachat.net |
pcachat.com |
pcachat.fr |
chatcap.in |
achatpc.fr |
pacchat.com |
pacatch.com |
achatpc.com |
DNS History
8 records (4 active, 4 former)
○NSac-odns-1.net.cs.cmu.edu2015-08-21 → 2016-11-26 · 4 obs
● 2016-11-26 01:10:06
○ 2026-03-12 03:20:40
○ 2026-05-09 07:27:00
○NSac-odns-2.net.cs.cmu.edu2015-08-21 → 2016-11-26 · 4 obs
● 2016-11-26 01:10:06
○ 2026-03-12 03:20:40
○ 2026-05-09 07:27:00
○NSac-odns-3.net.cs.cmu.edu2015-08-21 → 2016-11-26 · 4 obs
● 2016-11-26 01:10:06
○ 2026-03-12 03:20:40
○ 2026-05-09 07:27:00
●NSblox-dhcp.net.local.cmu.edu2026-03-12 → 2026-05-09 · 3 obs
● 2026-03-12 03:20:40
● 2026-05-09 07:27:00
●NSnsauth-ib1.net.cmu.edu2026-03-12 → 2026-05-09 · 3 obs
● 2026-03-12 03:20:40
● 2026-05-09 07:27:00
●NSnsauth-ib2.net.cmu.edu2026-03-12 → 2026-05-09 · 3 obs
● 2026-03-12 03:20:40
● 2026-05-09 07:27:00
○NSplanisphere.fac.cs.cmu.edu2015-08-21 → 2016-11-26 · 4 obs
● 2016-11-26 01:10:06
○ 2026-03-12 03:20:40
○ 2026-05-09 07:27:00
●A128.2.172.142015-08-21 → 2026-05-09 · 2 obs
● 2026-05-09 07:27:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | i.gtld-servers.net, m.gtld-servers.net, e.gtld-servers.net, g.gtld-servers.net... | - |
| captcha.net | nsauth-ib1.net.cmu.edu, nsauth-ib2.net.cmu.edu | - |
✅ Authoritative Response
Server:128.2.1.30
NS records: nsauth-ib1.net.cmu.edu, nsauth-ib2.net.cmu.edu
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for captcha.net (unsigned zone)
⏱️ Timing
Total: 423ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 128.2.172.14 |
| NS | 2 | nsauth-ib1.net.cmu.edu, nsauth-ib2.net.cmu.edu |
| SOA | 1 | blox-dhcp.net.local.cmu.edu host-master. |
Analysis
Hierarchy
The parent of www.captcha.net is captcha.net.
IP Addresses
captcha.net points to a single IP: 128.2.172.14.
Other host names, for example theory.cs.cmu.edu, web32.srv.cs.cmu.edu, tekkotsu.org and hri-metrics.org share IP numbers with captcha.net.
Name Servers
captcha.net is delegated to three name servers: nsauth-ib1.net.cmu.edu, nsauth-ib2.net.cmu.edu and blox-dhcp.net.local.cmu.edu.
captcha.net partially shares name servers with other domains; examples include hri-metrics.org, 82.237.128.in-addr.arpa, 201.2.128.in-addr.arpa, 184.2.128.in-addr.arpa and autolab.cs.cmu.edu.
these name servers are commonly used with the name servers blox-aws-01.ns.cmu.net.
Host names with one IP number:
Host nsauth-ib1.net.cmu.edu points to 128.2.1.30.
Host nsauth-ib2.net.cmu.edu points to 128.237.148.161.
Host blox-dhcp.net.local.cmu.edu points to 172.19.67.232.