ptr.is - robtex.com
ptr.is
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.ptr.is ⭐ | ||||||
| A | 2001:470:1d:97::1🇨🇦 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA | ||||||
| PTR | ns1.ptr.is | ||||||
| A | 158.51.99.163🇺🇸 ASN-CQ-GIGENET158.51.98.0/23 TNAHosting | ||||||
| PTR | ns1.ptr.is | ||||||
| NS | ns2.ptr.is | ||||||
| A | 2001:470:1d:97::b🇨🇦 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA | ||||||
| PTR | ns2.ptr.is | ||||||
| A | 64.44.157.211🇺🇸 NEXEON-164.44.144.0/20 DAL-1 | ||||||
| PTR | ns2.ptr.is | ||||||
| NS | ns3.ptr.is | ||||||
| A | 2001:470:1d:97::d🇨🇦 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA | ||||||
| PTR | ns3.ptr.is | ||||||
| A | 23.95.91.132🇺🇸 Colocrossing-AS23.95.90.0/23 ColoCrossing | ||||||
| PTR | 23-95-91-132-host.colocrossing.com | ||||||
| MX | mx.headquarter.email ⭐ | ||||||
| A | 2001:470:1f09:ce::1🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA | ||||||
| PTR | mx.headquarter.email | ||||||
| A | 91.109.118.73🇬🇧 UKSERVERS-AS91.109.112.0/21 UK Dedicated Servers Limited | ||||||
| PTR | mx.headquarter.email | ||||||
| TXT | v=spf1 +mx -all | ||||||
| SOA | ns1.ptr.ispostmaster@ptr.is 2026-05-23 #2 | ||||||
is
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.is ⭐ | ||||||
| NS | c.nic.is | ||||||
| NS | d.nic.is | ||||||
| NS | e.nic.is | ||||||
| NS | f.nic.is | ||||||
| SOA | a.nic.ishostmaster@isnic.is serial=1783981802 | ||||||
Subdomains
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●NSns1.ptr.is2026-02-14 → 2026-07-13 · 2 obs
● 2026-07-13 22:55:28
●NSns2.ptr.is2026-02-14 → 2026-07-13 · 2 obs
● 2026-07-13 22:55:28
●NSns3.ptr.is2026-02-14 → 2026-07-13 · 2 obs
● 2026-07-13 22:55:28
●MXmx.headquarter.email2026-02-14 → 2026-07-13 · 2 obs
● 2026-07-13 22:55:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| is | c.nic.is, e.nic.is, f.nic.is, a.nic.is... | - |
| ptr.is | ns1.ptr.is, ns2.ptr.is, ns3.ptr.is | 3 records |
✅ Authoritative Response
Server:158.51.99.163
NS records: ns1.ptr.is, ns2.ptr.is, ns3.ptr.is
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ptr.is (unsigned zone)
⏱️ Timing
Total: 343ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | ns3.ptr.is, ns1.ptr.is... |
| MX | 1 | mx.headquarter.email (pri: 5) |
| TXT | 1 | v=spf1 +mx -all |
| SOA | 1 | ns1.ptr.is postmaster.ptr.is |
📌 Glue Records Collected
Total: 3
In-bailiwick: 3 (ns1.ptr.is, ns2.ptr.is, ns3.ptr.is)
Analysis
Hierarchy
ptr.is sits above ns1.ptr.is, ns3.ptr.is and ns2.ptr.is in the domain hierarchy.
Name Servers
ptr.is is served by three name servers: ns1.ptr.is, ns2.ptr.is and ns3.ptr.is.
Some name servers delegated to ptr.is are also used by other domains, notably claudiney.info and headquarter.email.
The hostnames ns1.ptr.is, ns2.ptr.is and ns3.ptr.is each direct to two IP addresses — ns1.ptr.is to 158.51.99.163 and 2001:470:1d:97::1, ns2.ptr.is to 64.44.157.211 and 2001:470:1d:97::b, and ns3.ptr.is to 23.95.91.132 and 2001:470:1d:97::d.
Mail Servers
ptr.is uses one mail server — mx.headquarter.email.
The mail server setup of ptr.is is identical to that of domains like claudiney.info, headquarter.email and ptr.net.br.
mx.headquarter.email carries two IP numbers: 91.109.118.73 and 2001:470:1f09:ce::1.