refsum.ch - dns.ninja
refsum.ch
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 80.74.145.20🇨🇭 ASN-METANET80.74.144.0/20 METANET AG, Switzerland | ||||||
| PTR | napoleon.metanet.ch | ||||||
| NS | ch.pro.io ⭐ | ||||||
| A | 2a01:64c0:0:5000::19🇩🇪 CLOUDPIT2a01:64c0::/32 | ||||||
| PTR | ch.pro.io | ||||||
| A | 109.237.142.19🇩🇪 CLOUDPIT109.237.128.0/20 | ||||||
| PTR | ch.pro.io | ||||||
| NS | nl.pro.io | ||||||
| A | 2a01:4f8:fff3:66::219🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | nl.pro.io | ||||||
| A | 176.9.166.219🇩🇪 Hetzner176.9.0.0/16 HETZNER-RZ-FKS-BLK4 | ||||||
| PTR | nl.pro.io | ||||||
| NS | p.dnh.net | ||||||
| A | 2a02:2b80:101:5000::19🇩🇪 CLOUDPIT2a02:2b80:101::/48 | ||||||
| PTR | p.dnh.net | ||||||
| A | 109.237.143.19🇩🇪 CLOUDPIT109.237.128.0/20 | ||||||
| PTR | p.dnh.net | ||||||
| MX | mail.refsum.ch ⭐ | ||||||
| A | 80.74.145.20🇨🇭 ASN-METANET80.74.144.0/20 METANET AG, Switzerland | ||||||
| PTR | napoleon.metanet.ch | ||||||
| TXT | v=spf1 include:_spf.sui-inter.net +mx +a ~all | ||||||
| SOA | ch.pro.iohostmaster@metanet.ch 2021-08-03 #0 | ||||||
ch
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.ch ⭐ | ||||||
| NS | b.nic.ch | ||||||
| NS | d.nic.ch | ||||||
| NS | e.nic.ch | ||||||
| NS | f.nic.ch | ||||||
| SOA | a.nic.chdns-operation@switch.ch 2026-07-13 #18 | ||||||
Subdomains
mail.refsum.ch |
Same first word
Similar names
DNS History
10 records (5 active, 5 former)
●NSch.pro.io2026-02-20 → 2026-07-13 · 3 obs
● 2026-02-20 21:35:28
● 2026-07-13 07:33:40
●NSnl.pro.io2026-02-20 → 2026-07-13 · 3 obs
● 2026-02-20 21:35:28
● 2026-07-13 07:33:40
○NSns.eurisco.ch2015-07-21 → 2017-08-20 · 4 obs
● 2017-08-20 08:03:58
○ 2026-02-20 21:35:28
○ 2026-07-13 07:33:40
●NSp.dnh.net2026-02-20 → 2026-07-13 · 3 obs
● 2026-02-20 21:35:28
● 2026-07-13 07:33:40
○NStheseus.ftia.ch2015-07-21 → 2017-08-20 · 4 obs
● 2017-08-20 08:03:58
○ 2026-02-20 21:35:28
○ 2026-07-13 07:33:40
●MXmail.refsum.ch2026-02-20 → 2026-07-13 · 3 obs
● 2026-02-20 21:35:28
● 2026-07-13 07:33:40
○MXmx.creta.ch2015-07-21 → 2017-08-20 · 4 obs
● 2017-08-20 08:03:58
○ 2026-02-20 21:35:28
○ 2026-07-13 07:33:40
○MXrelay.creta.ch2015-07-21 → 2017-08-20 · 4 obs
● 2017-08-20 08:03:58
○ 2026-02-20 21:35:28
○ 2026-07-13 07:33:40
○A80.74.142.1202015-07-21 → 2017-08-20 · 4 obs
● 2017-08-20 08:03:58
○ 2026-02-20 21:35:28
○ 2026-07-13 07:33:40
●A80.74.145.202026-02-20 → 2026-07-13 · 3 obs
● 2026-02-20 21:35:28
● 2026-07-13 07:33:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ch | a.nic.ch, d.nic.ch, b.nic.ch, f.nic.ch... | - |
| refsum.ch | p.dnh.net, ch.pro.io, nl.pro.io | - |
✅ Authoritative Response
Server:109.237.143.19
NS records: p.dnh.net, ch.pro.io, nl.pro.io
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1007ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 80.74.145.20 |
| NS | 3 | p.dnh.net, nl.pro.io... |
| MX | 1 | mail.refsum.ch (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.sui-inter.net +mx +a |
| SOA | 1 | ch.pro.io hostmaster.metanet.ch |
Analysis
Hierarchy
refsum.ch serves as the parent of mail.refsum.ch.
IP Addresses
refsum.ch has exactly one IP address — 80.74.145.20.
mail.casarex-haus.ch, globepaddler.ch, mail.pewpew.ch plus two other host names have IP numbers in common with refsum.ch.
Name Servers
refsum.ch carries NS records delegating to ch.pro.io, nl.pro.io and p.dnh.net.
refsum.ch has at least partial name server overlap with other domains, such as 6044.ch, oia.ch, raum-prozessarbeit.ch and two others.
ch.pro.io, nl.pro.io and p.dnh.net are three hostnames that each resolve to a pair of IP addresses: ch.pro.io to 109.237.142.19 and 2a01:64c0:0:5000::19, nl.pro.io to 176.9.166.219 and 2a01:4f8:fff3:66::219, and p.dnh.net to 109.237.143.19 and 2a02:2b80:101:5000::19.
Mail Servers
refsum.ch uses one mail server — mail.refsum.ch.
mail.refsum.ch carries a single IP number, which is 80.74.145.20.