51-test.com - robtex.com

51-test.com

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:50ea🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:bba4🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.80.234Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.187.164🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSamanda.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3a3f🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRamanda.ns.cloudflare.com
A2803:f800:50::6ca2:c03f🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRamanda.ns.cloudflare.com
A2a06:98c1:50::ac40:203f🇺🇸 Cloudflare2a06:98c1:50::/45
PTRamanda.ns.cloudflare.com
A108.162.192.63🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.32.63🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A173.245.58.63🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NScolin.ns.cloudflare.com
A2606:4700:58::a29f:2c4b🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcolin.ns.cloudflare.com
A2803:f800:50::6ca2:c34b🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRcolin.ns.cloudflare.com
A2a06:98c1:50::ac40:234b🇺🇸 Cloudflare2a06:98c1:50::/45
PTRcolin.ns.cloudflare.com
A108.162.195.75🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcolin.ns.cloudflare.com
A162.159.44.75Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcolin.ns.cloudflare.com
A172.64.35.75🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcolin.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.80.234, 172.67.187.164
IPv6 hints2606:4700:3032::6815:50ea, 2606:4700:3033::ac43:bba4
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=223, name=cloudflare-ech.com
SOAamanda.ns.cloudflare.comdns@cloudflare.com serial=2409261584

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1784574397

Same first word

51-test.net
51-test.com

DNS History

9 records (6 active, 3 former)

200920112013201520172019202120232025NSamanda.ns.cloudflare.comcolin.ns.cloudflare.comdns15.hichina.comdns16.hichina.comA104.21.80.234172.67.187.1642606:4700:3032::6815:50ea2606:4700:3033::ac43:bba42606:4700:3030::ac43:bba4
●NSamanda.ns.cloudflare.com2026-05-17 → 2026-07-20 · 3 obs
○ 2015-09-24 02:10:42
● 2026-05-17 02:41:24
● 2026-07-20 19:20:08
●NScolin.ns.cloudflare.com2026-05-17 → 2026-07-20 · 3 obs
○ 2015-09-24 02:10:42
● 2026-05-17 02:41:24
● 2026-07-20 19:20:08
○NSdns15.hichina.com2008-03-08 → 2008-03-08 · 3 obs
● 2008-03-08 20:35:16
○ 2015-09-24 02:10:42
○ 2026-07-20 19:20:08
○NSdns16.hichina.com2008-03-08 → 2008-03-08 · 3 obs
● 2008-03-08 20:35:16
○ 2015-09-24 02:10:42
○ 2026-07-20 19:20:08
●A104.21.80.2342026-05-17 → 2026-07-20 · 2 obs
● 2026-05-17 02:41:24
● 2026-07-20 19:20:08
●A172.67.187.1642026-05-17 → 2026-07-20 · 2 obs
● 2026-05-17 02:41:24
● 2026-07-20 19:20:08
○A2606:4700:3030::ac43:bba42026-05-17 → 2026-06-15 · 4 obs
● 2026-05-17 02:41:24
● 2026-06-15 20:20:36
○ 2026-07-08 11:34:02
○ 2026-07-20 19:20:08
●A2606:4700:3032::6815:50ea2026-05-17 → 2026-07-20 · 2 obs
● 2026-05-17 02:41:24
● 2026-07-20 19:20:08
●A2606:4700:3033::ac43:bba42026-07-08 → 2026-07-20 · 3 obs
○ 2026-06-15 20:20:36
● 2026-07-08 11:34:02
● 2026-07-20 19:20:08

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
51-test.comamanda.ns.cloudflare.com, colin.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.63

NS records: amanda.ns.cloudflare.com, colin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51-test.com (unsigned zone)

⏱️ Timing

Total: 208ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.80.234, 172.67.187.164
AAAA22606:4700:3033::ac43:bba4, 2606:4700:3032::6815:50ea
NS2amanda.ns.cloudflare.com, colin.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1amanda.ns.cloudflare.com dns.cloudflare.

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (amanda.ns.cloudflare.com, amanda.ns.cloudflare.com, amanda.ns.cloudflare.com...)

Analysis

IP Addresses

51-test.com points to the four IP addresses 104.21.80.234, 172.67.187.164, 2606:4700:3032::6815:50ea and 2606:4700:3033::ac43:bba4.

bixiflor.com, www.uyrxaojxhlahg.space, www.utahindependent.com and two other host names share IP numbers with 51-test.com.

Name Servers

The NS records for 51-test.com delegate to amanda.ns.cloudflare.com and colin.ns.cloudflare.com.

51-test.com uses the same name servers as several other domains — among them szjkdl.com, wasacusa.com, 2205sh.com and two more.

There is at least partial name server overlap between 51-test.com and other domains — lerefugemc.fr, bannertool.com, balticpetroleum.lt and two more among them.

These name servers frequently co-occur with the name servers laylah.ns.cloudflare.com and jewel.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

amanda.ns.cloudflare.com maps to 108.162.192.63, 172.64.32.63, 173.245.58.63 and 3 additional IP addresses.

colin.ns.cloudflare.com maps to 108.162.195.75, 162.159.44.75, 172.64.35.75 and 3 additional IP addresses.