xcode.courses - dns.ninja
xcode.courses
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-ext-prod.jackfruit.edge.apple.com ⭐ | ||||||
| NS | a.ns.apple.com | ||||||
| A | 2620:149:ae0::53🇺🇸 Apple2620:149:ae0::/48 | ||||||
| PTR | a.ns.apple.com | ||||||
| A | 17.253.200.1🇺🇸 Apple17.253.200.0/24 Stefan Prefixes | ||||||
| PTR | a.ns.apple.com | ||||||
| NS | b.ns.apple.com | ||||||
| A | 2620:149:ae7::53🇺🇸 Apple2620:149:ae7::/48 | ||||||
| PTR | b.ns.apple.com | ||||||
| A | 17.253.207.1🇺🇸 Apple17.253.207.0/24 Stefan Prefixes | ||||||
| PTR | b.ns.apple.com | ||||||
| NS | c.ns.apple.com | ||||||
| A | 2620:171:800:714::1🇺🇸 UNSPECIFIED2620:171:800::/48 Packet Clearing House - v6 Anycast Prefix - 714 | ||||||
| PTR | c.ns.apple.com | ||||||
| A | 204.19.119.1🇺🇸 UNSPECIFIED204.19.119.0/24 Packet Clearing House - v4 Anycast Prefix - 714 | ||||||
| PTR | c.ns.apple.com | ||||||
| NS | d.ns.apple.com | ||||||
| A | 2620:171:801:714::1🇺🇸 UNSPECIFIED2620:171:801::/48 Packet Clearing House - v6 Anycast Prefix - 714 | ||||||
| PTR | d.ns.apple.com | ||||||
| A | 204.26.57.1🇺🇸 UNSPECIFIED204.26.57.0/24 Packet Clearing House - v4 Anycast Prefix - 714 | ||||||
| SOA | ns-ext-prod.jackfruit.edge.apple.comdnscontact@apple.com serial=2 | ||||||
courses
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.courses ⭐ | ||||||
| NS | b.nic.courses | ||||||
| NS | c.nic.courses | ||||||
| NS | x.nic.courses | ||||||
| NS | y.nic.courses | ||||||
| NS | z.nic.courses | ||||||
| SOA | a.nic.coursesadmin@tldns.godaddy serial=1792764604 | ||||||
Same first word
Similar names
Previous names
Next names
DNS History
5 records (5 active, 0 former)
●NSa.ns.apple.com2026-10-05 → 2026-10-23 · 2 obs
● 2026-10-23 15:09:38
●NSb.ns.apple.com2026-10-05 → 2026-10-23 · 2 obs
● 2026-10-23 15:09:38
●NSc.ns.apple.com2026-10-05 → 2026-10-23 · 2 obs
● 2026-10-23 15:09:38
●NSd.ns.apple.com2026-10-05 → 2026-10-23 · 2 obs
● 2026-10-23 15:09:38
●NSns-ext-prod.jackfruit.edge.apple.com2026-10-05 → 2026-10-23 · 2 obs
● 2026-10-23 15:09:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| courses | a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses... | 12 records |
| xcode.courses | b.ns.apple.com, a.ns.apple.com, d.ns.apple.com, c.ns.apple.com | - |
✅ Authoritative Response
Server:17.253.207.1
NS records: b.ns.apple.com, a.ns.apple.com, d.ns.apple.com, c.ns.apple.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for xcode.courses (unsigned zone)
⏱️ Timing
Total: 1123ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | a.ns.apple.com, b.ns.apple.com... |
| SOA | 1 | ns-ext-prod.jackfruit.edge.apple.com dns |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.courses, a.nic.courses, b.nic.courses...)
Analysis
Name Servers
Five name servers handle delegation for xcode.courses: a.ns.apple.com, b.ns.apple.com, c.ns.apple.com and two others.
There is at least partial name server overlap between xcode.courses and other domains — streamquicktime.net, icluodl.com, beatsbydre-headphonesshop.com and two more among them.
The name servers d.ns.apple.com, ns-ext-prod.jackfruit.apple.com and ns-ext-prod.jackfruit.edge.apple.com are often found in combination with these name servers.
All four hostnames — a.ns.apple.com, b.ns.apple.com, c.ns.apple.com and d.ns.apple.com — resolve to two IP numbers apiece: a.ns.apple.com to 17.253.200.1 and 2620:149:ae0::53; b.ns.apple.com to 17.253.207.1 and 2620:149:ae7::53; c.ns.apple.com to 204.19.119.1 and 2620:171:800:714::1; d.ns.apple.com to 204.26.57.1 and 2620:171:801:714::1.