prepbuilder.dev - robtex.com
prepbuilder.dev
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3033::ac43:aa54🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3034::6815:3716🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.55.22Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.170.84🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | ivy.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3a78🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ivy.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c078🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | ivy.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2078🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | ivy.ns.cloudflare.com | ||||||
| A | 108.162.192.120🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ivy.ns.cloudflare.com | ||||||
| A | 172.64.32.120🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ivy.ns.cloudflare.com | ||||||
| A | 173.245.58.120🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ivy.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 | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.55.22, 172.67.170.84 | ||||||
| IPv6 hints | 2606:4700:3033::ac43:aa54, 2606:4700:3034::6815:3716 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=72, name=cloudflare-ech.com | ||||||
| SOA | ivy.ns.cloudflare.comdns@cloudflare.com serial=2419521259 | ||||||
dev
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-tld1.charlestonroadregistry.com ⭐ | ||||||
| NS | ns-tld2.charlestonroadregistry.com | ||||||
| NS | ns-tld3.charlestonroadregistry.com | ||||||
| NS | ns-tld4.charlestonroadregistry.com | ||||||
| NS | ns-tld5.charlestonroadregistry.com | ||||||
| SOA | ns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=1 | ||||||
Same first word
prepbuilder.com |
prepbuilder.dev |
Similar names
Previous names
Next names
DNS History
6 records (6 active, 0 former)
●NSivy.ns.cloudflare.com2026-11-03 → 2026-11-07 · 2 obs
● 2026-11-07 20:37:52
●NSnicolas.ns.cloudflare.com2026-11-03 → 2026-11-07 · 2 obs
● 2026-11-07 20:37:52
●A104.21.55.222026-11-03 → 2026-11-07 · 2 obs
● 2026-11-07 20:37:52
●A172.67.170.842026-11-03 → 2026-11-07 · 2 obs
● 2026-11-07 20:37:52
●A2606:4700:3033::ac43:aa542026-11-03 → 2026-11-07 · 2 obs
● 2026-11-07 20:37:52
●A2606:4700:3034::6815:37162026-11-03 → 2026-11-07 · 2 obs
● 2026-11-07 20:37:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| dev | ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com... | - |
| prepbuilder.dev | nicolas.ns.cloudflare.com, ivy.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.195.84
NS records: nicolas.ns.cloudflare.com, ivy.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for prepbuilder.dev (unsigned zone)
⏱️ Timing
Total: 670ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.55.22, 172.67.170.84 |
| AAAA | 2 | 2606:4700:3033::ac43:aa54, 2606:4700:3034::6815:3716 |
| NS | 2 | ivy.ns.cloudflare.com, nicolas.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | ivy.ns.cloudflare.com dns.cloudflare.com |
Analysis
IP Addresses
prepbuilder.dev resolves to four IP addresses: 104.21.55.22, 172.67.170.84, 2606:4700:3033::ac43:aa54 and 2606:4700:3034::6815:3716.
Two other host names, along with testdcipher.com, clobberhq.com and w-88.us.com, also share IP numbers with prepbuilder.dev.
Name Servers
prepbuilder.dev is served by two delegated name servers, ivy.ns.cloudflare.com and nicolas.ns.cloudflare.com.
prepbuilder.dev shares its NS records with other domains, for example element14changetheworld.com, boefzgje.workers.dev, legalzens.pages.dev and two others.
prepbuilder.dev has at least partial name server overlap with other domains, such as pero55-turun-dari-langit.pages.dev, cloudrxmanager.com, navsphere-3oi.pages.dev and two others.
It is common to see these name servers used together with name servers skip.ns.cloudflare.com and karina.ns.cloudflare.com.
DNS names with 6 IP addresses:
ivy.ns.cloudflare.com carries IP addresses 108.162.192.120, 172.64.32.120 and 173.245.58.120, with 3 other addresses beyond those.
nicolas.ns.cloudflare.com carries IP addresses 108.162.195.84, 162.159.44.84 and 172.64.35.84, with 3 other addresses beyond those.