practicalprogramming.tech - dns.ninja
practicalprogramming.tech
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::ac43:9f7bCloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3035::6815:3251Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.50.81Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.159.123Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | ada.ns.cloudflare.com ⭐ | ||||||
| NS | dilbert.ns.cloudflare.com | ||||||
| A | 2606:4700:58::adf5:3b9b🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dilbert.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c19b🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | dilbert.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:219b🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | dilbert.ns.cloudflare.com | ||||||
| A | 108.162.193.155🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dilbert.ns.cloudflare.com | ||||||
| A | 172.64.33.155🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dilbert.ns.cloudflare.com | ||||||
| A | 173.245.59.155🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dilbert.ns.cloudflare.com | ||||||
| MX | smtp.google.com ⭐ | ||||||
| TXT | google-site-verification=cm0Mdgem8YjFhwuuV3N7KQ-GQSG2aaSkccePnYR6IKM | ||||||
| TXT | v=spf1 include:_spf.google.com ~all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.50.81, 172.67.159.123 | ||||||
| IPv6 hints | 2606:4700:3032::ac43:9f7b, 2606:4700:3035::6815:3251 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=38, name=cloudflare-ech.com | ||||||
| SOA | ada.ns.cloudflare.comdns@cloudflare.com serial=2414958504 | ||||||
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=1792444142 | ||||||
Same first word
practicalprogramming.tech |
practicalprogramming.ph |
DNS History
11 records (7 active, 4 former)
●NSada.ns.cloudflare.com2026-09-14 → 2026-10-19 · 2 obs
● 2026-09-14 00:01:20
● 2026-10-19 21:13:34
● 2026-10-19 21:13:34
●NSdilbert.ns.cloudflare.com2026-09-14 → 2026-10-19 · 2 obs
● 2026-09-14 00:01:20
● 2026-10-19 21:13:34
● 2026-10-19 21:13:34
●MXsmtp.google.com2026-09-14 → 2026-10-19 · 2 obs
● 2026-09-14 00:01:20
● 2026-10-19 21:13:34
● 2026-10-19 21:13:34
●A104.21.50.812026-09-16 → 2026-10-19 · 3 obs
○ 2026-09-14 00:01:20
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
●A172.67.159.1232026-09-16 → 2026-10-19 · 3 obs
○ 2026-09-14 00:01:20
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
○A188.114.96.02026-09-14 → 2026-09-14 · 3 obs
● 2026-09-14 00:01:20
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
○A188.114.97.02026-09-14 → 2026-09-14 · 3 obs
● 2026-09-14 00:01:20
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
●A2606:4700:3032::ac43:9f7b2026-09-16 → 2026-10-19 · 3 obs
○ 2026-09-14 00:01:20
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
●A2606:4700:3035::6815:32512026-09-16 → 2026-10-19 · 3 obs
○ 2026-09-14 00:01:20
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
● 2026-09-16 16:30:08
● 2026-10-19 21:13:34
○A2a06:98c1:3120::2026-09-14 → 2026-09-14 · 3 obs
● 2026-09-14 00:01:20
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
○A2a06:98c1:3121::2026-09-14 → 2026-09-14 · 3 obs
● 2026-09-14 00:01:20
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
○ 2026-09-16 16:30:08
○ 2026-10-19 21:13:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tech | ns01.trs-dns.com, ns01.trs-dns.net, ns10.trs-dns.org, ns10.trs-dns.info | - |
| practicalprogramming.tech | dilbert.ns.cloudflare.com, ada.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.192.54
NS records: dilbert.ns.cloudflare.com, ada.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for practicalprogramming.tech (unsigned zone)
⏱️ Timing
Total: 3075ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.50.81, 172.67.159.123 |
| AAAA | 2 | 2606:4700:3032::ac43:9f7b, 2606:4700:3035::6815:3251 |
| NS | 2 | ada.ns.cloudflare.com, dilbert.ns.cloudflare.com |
| MX | 1 | smtp.google.com (pri: 1) |
| TXT | 2 | google-site-verification=cm0Mdgem8YjFhwu, v=spf1 include:_spf.google.com ~all |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | ada.ns.cloudflare.com dns.cloudflare.com |
Analysis
IP Addresses
practicalprogramming.tech points to four IP numbers: 104.21.50.81, 172.67.159.123, 2606:4700:3032::ac43:9f7b and 2606:4700:3035::6815:3251.
Name Servers
practicalprogramming.tech uses two name servers for its delegation: ada.ns.cloudflare.com and dilbert.ns.cloudflare.com.
Host names with 6 IP numbers:
The host name dilbert.ns.cloudflare.com points to: 108.162.193.155, 172.64.33.155, 173.245.59.155 and 3 other.
Mail Servers
practicalprogramming.tech is handled by one mail server, smtp.google.com.