mail.code4u.nl - dns.ninja
mail.code4u.nl
| CNAME | code4u.nl | ||||||
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 136.144.247.252🇳🇱 TRANSIP-AS136.144.128.0/17 TransIP BV Amsterdam, The Netherlands | ||||||
| PTR | 136-144-247-252.colo.transip.net | ||||||
| NS | ns0.transip.net ⭐ | ||||||
| A | 2a01:7c8:dddd:195::195🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network | ||||||
| PTR | ns0.transip.net | ||||||
| A | 195.135.195.195🇮🇹 TRANSIP-AS195.135.195.0/24 TransIP B.V. | ||||||
| PTR | ns0.transip.net | ||||||
| NS | ns1.transip.nl | ||||||
| A | 2a01:7c8:7000:195::195🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network | ||||||
| PTR | ns1.transip.nl | ||||||
| A | 195.8.195.195🇳🇱 TRANSIP-AS195.8.195.0/24 TransIP B.V. | ||||||
| PTR | ns1.transip.nl | ||||||
| NS | ns2.transip.eu | ||||||
| A | 2a01:7c8:f:c1f::195🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network | ||||||
| PTR | ns2.transip.eu | ||||||
| A | 37.97.199.195🇳🇱 TRANSIP-AS37.97.128.0/17 TransIP BV Amsterdam, The Netherlands | ||||||
| PTR | ns2.transip.eu | ||||||
| MX | mail.code4u.nl ⭐ | ||||||
| TXT | v=spf1 a mx ptr ip4:136.144.247.252 mx:code4u.nl -all | ||||||
| SOA | ns0.transip.nethostmaster@transip.nl 2021-11-28 #1 | ||||||
code4u.nl
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 136.144.247.252🇳🇱 TRANSIP-AS136.144.128.0/17 TransIP BV Amsterdam, The Netherlands | ||||||
| NS | ns0.transip.net ⭐ | ||||||
| NS | ns1.transip.nl | ||||||
| NS | ns2.transip.eu | ||||||
| MX | mail.code4u.nl ⭐ | ||||||
| TXT | v=spf1 a mx ptr ip4:136.144.247.252 mx:code4u.nl -all | ||||||
| SOA | ns0.transip.nethostmaster@transip.nl 2021-11-28 #1 | ||||||
MX for
Same first word
Similar names
DNS History
7 records (1 active, 6 former)
○NSns0.transip.nl2016-09-12 → 2016-09-12 · 3 obs
○ 2026-04-23 06:26:06
○ 2026-08-03 00:14:30
○NSns1.transip.net2016-09-12 → 2016-09-12 · 3 obs
○ 2026-04-23 06:26:06
○ 2026-08-03 00:14:30
○NSns2.transip.eu2016-09-12 → 2016-09-12 · 3 obs
○ 2026-04-23 06:26:06
○ 2026-08-03 00:14:30
○MXcode4u.nl2016-09-12 → 2016-09-12 · 3 obs
○ 2026-04-23 06:26:06
○ 2026-08-03 00:14:30
○A2a01:7c8:3:1337::272016-09-12 → 2016-09-12 · 3 obs
○ 2026-04-23 06:26:06
○ 2026-08-03 00:14:30
○A37.97.254.272016-09-12 → 2016-09-12 · 3 obs
○ 2026-04-23 06:26:06
○ 2026-08-03 00:14:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| nl | ns1.dns.nl, ns3.dns.nl, ns4.dns.nl | - |
| code4u.nl | ns0.transip.net, ns1.transip.nl, ns2.transip.eu | 2 records |
✅ Authoritative Response
Server:195.135.195.195
NS records: ns0.transip.net, ns1.transip.nl, ns2.transip.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 630ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | code4u.nl |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.transip.nl, ns1.transip.nl)
Analysis
Mail Server Role
Mail for code4u.nl is routed through the mail server mail.code4u.nl.
IP Addresses
mail.code4u.nl has exactly one IP address — 136.144.247.252.
Other host names, among them code4u.nl and 136-144-247-252.colo.transip.net, have IP numbers in common with mail.code4u.nl.
Name Servers
mail.code4u.nl is served by three name servers: ns2.transip.eu, ns0.transip.net and ns1.transip.nl.
At least some of mail.code4u.nl's name servers are shared with other domains, for example timpons.com, dfq.be, gsmreparatiecentrum.nl and two more.
The hostnames ns2.transip.eu, ns0.transip.net and ns1.transip.nl each direct to two IP addresses — ns2.transip.eu to 37.97.199.195 and 2a01:7c8:f:c1f::195, ns0.transip.net to 195.135.195.195 and 2a01:7c8:dddd:195::195, and ns1.transip.nl to 195.8.195.195 and 2a01:7c8:7000:195::195.
Mail Servers
mail.code4u.nl uses exactly one mail server, which is mail.code4u.nl.
mail.code4u.nl uses the same mail servers as other domains, including code4u.nl.