erslibrary.net - robtex.com
erslibrary.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 204.155.11.10🇺🇸 TCOE204.155.0.0/20 Tulare County Office of Education | ||||||
| NS | ns1-07.azure-dns.com ⭐ | ||||||
| A | 2603:1061:0:700::7🇺🇸 Microsoft2603:1000::/25 MICROSOFT | ||||||
| PTR | ns1-07.azure-dns.com | ||||||
| A | 13.107.236.7🇺🇸 Microsoft13.104.0.0/14 MICROSOFT | ||||||
| PTR | ns1-07.azure-dns.com | ||||||
| NS | ns2-07.azure-dns.net | ||||||
| A | 2620:1ec:8ec:700::7🇺🇸 Microsoft2620:1ec::/36 MICROSOFT | ||||||
| PTR | ns2-07.azure-dns.net | ||||||
| A | 150.171.21.7🇺🇸 Microsoft150.171.0.0/16 MICROSOFT | ||||||
| PTR | ns2-07.azure-dns.net | ||||||
| NS | ns3-07.azure-dns.org | ||||||
| A | 2a01:111:4000:700::7🇬🇧 Microsoft2a01:111:4000::/36 | ||||||
| PTR | ns3-07.azure-dns.org | ||||||
| A | 204.14.183.7🇺🇸 Microsoft204.14.180.0/22 | ||||||
| PTR | ns3-07.azure-dns.org | ||||||
| NS | ns4-07.azure-dns.info | ||||||
| A | 2620:1ec:bda:700::7🇺🇸 Microsoft2620:1ec::/36 MICROSOFT | ||||||
| PTR | ns4-07.azure-dns.info | ||||||
| A | 208.84.5.7🇺🇸 Microsoft208.84.0.0/21 MICROSOFT | ||||||
| PTR | ns4-07.azure-dns.info | ||||||
| SOA | ns1-07.azure-dns.comroot@tcoe.org 2015-09-22 #4 | ||||||
net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1785061272 | ||||||
Same first word
erslibrary.net |
erslibrary.org |
DNS History
10 records (5 active, 5 former)
○NSns.tcoe.k12.ca.us2007-09-15 → 2007-09-15 · 3 obs
○ 2015-06-01 22:16:06
○ 2026-07-26 10:23:06
○NSns.tcoe.org2007-09-15 → 2016-03-27 · 4 obs
● 2016-03-27 14:30:12
○ 2026-02-18 11:01:14
○ 2026-07-26 10:23:06
●NSns1-07.azure-dns.com2026-02-18 → 2026-07-26 · 3 obs
● 2026-02-18 11:01:14
● 2026-07-26 10:23:06
●NSns2-07.azure-dns.net2026-02-18 → 2026-07-26 · 3 obs
● 2026-02-18 11:01:14
● 2026-07-26 10:23:06
○NSns2.tcoe.org2015-06-01 → 2016-03-27 · 5 obs
● 2015-06-01 22:16:06
● 2016-03-27 14:30:12
○ 2026-02-18 11:01:14
○ 2026-07-26 10:23:06
●NSns3-07.azure-dns.org2026-02-18 → 2026-07-26 · 3 obs
● 2026-02-18 11:01:14
● 2026-07-26 10:23:06
●NSns4-07.azure-dns.info2026-02-18 → 2026-07-26 · 3 obs
● 2026-02-18 11:01:14
● 2026-07-26 10:23:06
○A204.155.1.202015-06-01 → 2015-06-01 · 4 obs
● 2015-06-01 22:16:06
○ 2015-10-18 04:51:54
○ 2026-07-26 10:23:06
●A204.155.11.102015-10-18 → 2026-07-26 · 3 obs
● 2015-10-18 04:51:54
● 2026-07-26 10:23:06
○A204.155.3.152007-09-15 → 2007-09-15 · 3 obs
○ 2015-06-01 22:16:06
○ 2026-07-26 10:23:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | f.gtld-servers.net, l.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net... | - |
| erslibrary.net | ns1-07.azure-dns.com, ns2-07.azure-dns.net, ns3-07.azure-dns.org, ns4-07.azure-dns.info | 2 records |
✅ Authoritative Response
Server:13.107.236.7
NS records: ns1-07.azure-dns.com, ns2-07.azure-dns.net, ns3-07.azure-dns.org, ns4-07.azure-dns.info
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for erslibrary.net (unsigned zone)
⏱️ Timing
Total: 563ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 204.155.11.10 |
| NS | 4 | ns1-07.azure-dns.com, ns2-07.azure-dns.net... |
| SOA | 1 | ns1-07.azure-dns.com root.tcoe.org |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2-07.azure-dns.net, ns2-07.azure-dns.net)
Analysis
IP Addresses
erslibrary.net has exactly one IP address — 204.155.11.10.
auditor.tcoe.org is an example of another host name that shares IP numbers with erslibrary.net.
Name Servers
Four name servers handle the delegation for erslibrary.net: ns1-07.azure-dns.com, ns4-07.azure-dns.info, ns2-07.azure-dns.net and ns3-07.azure-dns.org.
There is at least partial name server overlap between erslibrary.net and other domains — swal.in, sodankyla.org, exowind.com and two more among them.
All four hostnames — ns1-07.azure-dns.com, ns4-07.azure-dns.info, ns2-07.azure-dns.net and ns3-07.azure-dns.org — resolve to two IP numbers apiece: ns1-07.azure-dns.com to 13.107.236.7 and 2603:1061:0:700::7; ns4-07.azure-dns.info to 208.84.5.7 and 2620:1ec:bda:700::7; ns2-07.azure-dns.net to 150.171.21.7 and 2620:1ec:8ec:700::7; ns3-07.azure-dns.org to 204.14.183.7 and 2a01:111:4000:700::7.