studyguide.co - dns.ninja
studyguide.co
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-460.awsdns-57.com ⭐ | ||||||
| A | 2600:9000:5301:cc00::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront | ||||||
| PTR | ns-460.awsdns-57.com | ||||||
| A | 205.251.193.204🇺🇸 Amazon205.251.193.0/24 prefix | ||||||
| PTR | ns-460.awsdns-57.com | ||||||
| NS | ns-1075.awsdns-06.org | ||||||
| A | 2600:9000:5304:3300::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront | ||||||
| PTR | ns-1075.awsdns-06.org | ||||||
| A | 205.251.196.51🇺🇸 Amazon205.251.196.0/24 prefix | ||||||
| PTR | ns-1075.awsdns-06.org | ||||||
| NS | ns-1756.awsdns-27.co.uk | ||||||
| A | 2600:9000:5306:dc00::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront | ||||||
| PTR | ns-1756.awsdns-27.co.uk | ||||||
| A | 205.251.198.220🇺🇸 Amazon205.251.198.0/24 prefix | ||||||
| PTR | ns-1756.awsdns-27.co.uk | ||||||
| NS | ns-875.awsdns-45.net | ||||||
| A | 2600:9000:5303:6b00::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront | ||||||
| PTR | ns-875.awsdns-45.net | ||||||
| A | 205.251.195.107🇺🇸 Amazon205.251.195.0/24 prefix | ||||||
| PTR | ns-875.awsdns-45.net | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns-460.awsdns-57.comawsdns-hostmaster@amazon.com serial=1 | ||||||
co
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.registrydns.co | ||||||
| NS | b.registrydns.co | ||||||
| NS | c.registrydns.co | ||||||
| NS | d.registrydns.co | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=1759687832 | ||||||
Same first word
studyguide.gr |
studyguide.net |
studyguide.eu |
studyguide.com |
studyguide.ca |
studyguide.buzz |
studyguide.co.in |
studyguide.org |
studyguide.ch |
studyguide.at |
studyguide.cn |
studyguide.co |
studyguide.us |
studyguide.de |
Similar names
DNS History
5 records (4 active, 1 former)
●NSns-1075.awsdns-06.org2015-07-24 → 2026-06-22 · 2 obs
● 2026-06-22 04:34:36
●NSns-1756.awsdns-27.co.uk2015-07-24 → 2026-06-22 · 2 obs
● 2026-06-22 04:34:36
●NSns-460.awsdns-57.com2015-07-24 → 2026-06-22 · 2 obs
● 2026-06-22 04:34:36
●NSns-875.awsdns-45.net2015-07-24 → 2026-06-22 · 2 obs
● 2026-06-22 04:34:36
○MX(root)2020-03-12 → 2020-03-12 · 3 obs
○ 2026-02-28 14:35:46
○ 2026-06-22 04:34:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co | - |
| studyguide.co | ns-460.awsdns-57.com, ns-1075.awsdns-06.org, ns-875.awsdns-45.net, ns-1756.awsdns-27.co.uk | - |
✅ Authoritative Response
Server:205.251.195.107
NS records: ns-460.awsdns-57.com, ns-1075.awsdns-06.org, ns-875.awsdns-45.net, ns-1756.awsdns-27.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for studyguide.co (unsigned zone)
⏱️ Timing
Total: 454ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns-1075.awsdns-06.org, ns-1756.awsdns-27.co.uk... |
| MX | 1 | . (pri: 0) |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | ns-460.awsdns-57.com awsdns-hostmaster.a |
Analysis
Name Servers
The authoritative name servers for studyguide.co are ns-460.awsdns-57.com, ns-875.awsdns-45.net, ns-1075.awsdns-06.org and ns-1756.awsdns-27.co.uk.
studyguide.co partially shares its NS delegation with several other domains, including luxuryhomebuilder.de, screenful.com, benjehl.com and two others.
In DNS configurations, these name servers often share authority with ns-969.awsdns-57.net, ns-1291.awsdns-33.org, ns-1625.awsdns-11.co.uk and 5 other name servers.
ns-460.awsdns-57.com, ns-875.awsdns-45.net, ns-1075.awsdns-06.org and ns-1756.awsdns-27.co.uk each carry two IP addresses. ns-460.awsdns-57.com has 205.251.193.204 and 2600:9000:5301:cc00::1; ns-875.awsdns-45.net has 205.251.195.107 and 2600:9000:5303:6b00::1; ns-1075.awsdns-06.org has 205.251.196.51 and 2600:9000:5304:3300::1; ns-1756.awsdns-27.co.uk has 205.251.198.220 and 2600:9000:5306:dc00::1.