core.edu - robtex.com
core.edu
edu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.edu-servers.net ⭐ | ||||||
| NS | b.edu-servers.net | ||||||
| NS | c.edu-servers.net | ||||||
| NS | d.edu-servers.net | ||||||
| NS | e.edu-servers.net | ||||||
| NS | f.edu-servers.net | ||||||
| NS | g.edu-servers.net | ||||||
| NS | h.edu-servers.net | ||||||
| NS | i.edu-servers.net | ||||||
| NS | j.edu-servers.net | ||||||
| NS | k.edu-servers.net | ||||||
| NS | l.edu-servers.net | ||||||
| NS | m.edu-servers.net | ||||||
| SOA | a.edu-servers.netnstld@verisign-grs.com serial=1778306136 | ||||||
Subdomains
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSns-1251.awsdns-28.org2026-02-18 → 2026-05-09 · 2 obs
● 2026-05-09 06:05:00
●NSns-1759.awsdns-27.co.uk2026-02-18 → 2026-05-09 · 2 obs
● 2026-05-09 06:05:00
●NSns-36.awsdns-04.com2026-02-18 → 2026-05-09 · 2 obs
● 2026-05-09 06:05:00
●NSns-519.awsdns-00.net2026-02-18 → 2026-05-09 · 2 obs
● 2026-05-09 06:05:00
●MXcore-edu.mail.protection.outlook.com2026-02-18 → 2026-05-09 · 2 obs
● 2026-05-09 06:05:00
●A161.35.105.1422026-02-18 → 2026-05-09 · 2 obs
● 2026-05-09 06:05:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| edu | a.edu-servers.net, b.edu-servers.net, c.edu-servers.net, d.edu-servers.net... | - |
| core.edu | ns-36.awsdns-04.com, ns-519.awsdns-00.net, ns-1759.awsdns-27.co.uk, ns-1251.awsdns-28.org | - |
✅ Authoritative Response
Server:205.251.194.7
NS records: ns-36.awsdns-04.com, ns-519.awsdns-00.net, ns-1759.awsdns-27.co.uk, ns-1251.awsdns-28.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for core.edu (unsigned zone)
⏱️ Timing
Total: 603ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 161.35.105.142 |
| NS | 4 | ns-1251.awsdns-28.org, ns-1759.awsdns-27.co.uk... |
| MX | 1 | core-edu.mail.protection.outlook.com (pr |
| TXT | 14 | ZOOM_verify_6gse2whher9tv9gU0kvyW2, apple-domain-verification=a0tFhi1DNugIxm... |
| SOA | 1 | ns-36.awsdns-04.com awsdns-hostmaster.am |
Analysis
Hierarchy
core.edu is the parent of www.core.edu and deploy.core.edu.
IP Addresses
core.edu points to an IP address: 161.35.105.142.
Other host names, for instance deploy.core.edu, share IP numbers with core.edu.
Name Servers
core.edu delegates to four name servers: ns-36.awsdns-04.com, ns-519.awsdns-00.net, ns-1251.awsdns-28.org and ns-1759.awsdns-27.co.uk.
core.edu at least partially shares name servers with other domains, for instance d34kp4hsys43y1.cloudfront.net, tayloredbloomsfloral.com, gaienwest.jp, wjwcreative.com and coala.thoughtfish.de.
Host names with two IP numbers: ns-36.awsdns-04.com points to 2600:9000:5300:2400::1 and 205.251.192.36; ns-519.awsdns-00.net points to 2600:9000:5302:700::1 and 205.251.194.7; ns-1251.awsdns-28.org points to 2600:9000:5304:e300::1 and 205.251.196.227; ns-1759.awsdns-27.co.uk points to 2600:9000:5306:df00::1 and 205.251.198.223.
Mail Servers
core.edu is handled by a single mail server, core-edu.mail.protection.outlook.com.
Hostname core-edu.mail.protection.outlook.com resolves to eight IP numbers: 2a01:111:f403:c91d::, 2a01:111:f403:c931::1, 2a01:111:f403:f802::, 2a01:111:f403:f908::1, 52.101.9.0, 52.101.10.1, 52.101.41.24 and 52.101.194.0.