w3schools.tech - robtex.com
w3schools.tech
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3031::6815:45fb🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3031::ac43:d81f🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.69.251Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.216.31🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | heidi.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::a29f:26ec🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | heidi.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c2ec🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | heidi.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:22ec🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | heidi.ns.cloudflare.com | ||||||
| A | 108.162.194.236🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | heidi.ns.cloudflare.com | ||||||
| A | 162.159.38.236Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | heidi.ns.cloudflare.com | ||||||
| A | 172.64.34.236🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | heidi.ns.cloudflare.com | ||||||
| NS | nicolas.ns.cloudflare.com | ||||||
| A | 2606:4700:58::a29f:2c54🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | nicolas.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c354🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | nicolas.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2354🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | nicolas.ns.cloudflare.com | ||||||
| A | 108.162.195.84🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | nicolas.ns.cloudflare.com | ||||||
| A | 162.159.44.84Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | nicolas.ns.cloudflare.com | ||||||
| A | 172.64.35.84🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | nicolas.ns.cloudflare.com | ||||||
| TXT | google-site-verification=gNikoXJlNXtMlP6cmobhX6E_fEMpdYoWFsuNQUX3s0k | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.69.251, 172.67.216.31 | ||||||
| IPv6 | 2606:4700:3031::6815:45fb, 2606:4700:3031::ac43:d81f | ||||||
| SOA | heidi.ns.cloudflare.comdns@cloudflare.com serial=2399485461 | ||||||
tech
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns01.trs-dns.com ⭐ | ||||||
| NS | ns.trs-dns.com | ||||||
| NS | ns01.trs-dns.net | ||||||
| NS | ns10.trs-dns.info | ||||||
| NS | ns10.trs-dns.org | ||||||
| SOA | ns.trs-dns.comtrs-ops@tucows.com serial=1774515548 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSheidi.ns.cloudflare.com2026-03-20 → 2026-03-26 · 2 obs
● 2026-03-26 09:01:16
●NSnicolas.ns.cloudflare.com2026-03-20 → 2026-03-26 · 2 obs
● 2026-03-26 09:01:16
●A104.21.69.2512026-03-20 → 2026-03-26 · 2 obs
● 2026-03-26 09:01:16
●A172.67.216.312026-03-20 → 2026-03-26 · 2 obs
● 2026-03-26 09:01:16
●A2606:4700:3031::6815:45fb2026-03-20 → 2026-03-26 · 2 obs
● 2026-03-26 09:01:16
●A2606:4700:3031::ac43:d81f2026-03-20 → 2026-03-26 · 2 obs
● 2026-03-26 09:01:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tech | ns01.trs-dns.com, ns10.trs-dns.info, ns10.trs-dns.org, ns01.trs-dns.net | - |
| w3schools.tech | heidi.ns.cloudflare.com, nicolas.ns.cloudflare.com | - |
✅ Authoritative Response
Server:162.159.44.84
NS records: heidi.ns.cloudflare.com, nicolas.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for w3schools.tech (unsigned zone)
⏱️ Timing
Total: 1102ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.69.251, 172.67.216.31 |
| AAAA | 2 | 2606:4700:3031::6815:45fb, 2606:4700:3031::ac43:d81f |
| NS | 2 | heidi.ns.cloudflare.com, nicolas.ns.cloudflare.com |
| TXT | 1 | google-site-verification=gNikoXJlNXtMlP6 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | heidi.ns.cloudflare.com dns.cloudflare.c |
Analysis
IP Addresses
w3schools.tech maps to four IP numbers: 2606:4700:3031::6815:45fb, 2606:4700:3031::ac43:d81f, 104.21.69.251 and 172.67.216.31.
Other host names, for instance www.smkn5malang.sch.id, indoseven-isv.com, weatherwatchernetwork.com, mpointapp.com and www.alladzup.com share IP numbers with w3schools.tech.
Name Servers
Two name servers heidi.ns.cloudflare.com and nicolas.ns.cloudflare.com are delegated to w3schools.tech.
w3schools.tech uses the same name server configuration as other domains, such as essens.co.uk, christinejane.nz, mawsal.net.nz, essensworld.kz and bananagroup.mx.
w3schools.tech at least partially shares name servers with other domains such as anitaylor.com, rollingforecastnow.com, aktu.news, fnslqczl.com and 5631milanuncios.com.
these name servers are commonly used with the name servers vern.ns.cloudflare.com.
Host names with six IP numbers: Host name heidi.ns.cloudflare.com points to 2606:4700:50::a29f:26ec, 2803:f800:50::6ca2:c2ec, 2a06:98c1:50::ac40:22ec, 108.162.194.236, 162.159.38.236 and 172.64.34.236; host name nicolas.ns.cloudflare.com points to 2606:4700:58::a29f:2c54, 2803:f800:50::6ca2:c354, 2a06:98c1:50::ac40:2354, 108.162.195.84, 162.159.44.84 and 172.64.35.84.