`java4u.ch`

DNSSEC	⚠️ Not signed
A	80.74.147.33^{🇨🇭 ASN-METANET80.74.144.0/20 METANET AG, Switzerland}
		PTR	`amphora.sui-inter.net`
NS	`ns1.amphora.sui-inter.net` ⭐
		A	2a00:1128:1:1::147:33^{🇨🇭 ASN-METANET2a00:1128::/32 METANET AG, Switzerland IPv6 Allocation}
			PTR	`amphora.sui-inter.net`
		A	80.74.147.33^{🇨🇭 ASN-METANET80.74.144.0/20 METANET AG, Switzerland}
			PTR	`amphora.sui-inter.net`
NS	`ns2.amphora.sui-inter.net`
		A	2a00:1128:0:201:2::112^{🇨🇭 ASN-METANET2a00:1128::/32 METANET AG, Switzerland IPv6 Allocation}
		A	46.231.201.112^{🇨🇭 ASN-METANET46.231.200.0/21 METANET AG, Switzerland}
MX	`mail.java4u.ch` ⭐
		A	80.74.147.33^{🇨🇭 ASN-METANET80.74.144.0/20 METANET AG, Switzerland}
			PTR	`amphora.sui-inter.net`
TXT	`v=spf1 include:_spf.sui-inter.net +mx +a ~all`
SOA	`ns1.amphora.sui-inter.net`daniel\@sterchi.moonsoft.ch 2025-11-01 #42

`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.ch`dns-operation@switch.ch 2026-06-13 #18

Subdomains

mail.java4u.ch

Same first word

java4u.de

java4u.com

java4u.ch

DNS History

6 records (4 active, 2 former)

○NSns.ch-inter.net2015-08-06 → 2018-09-11 · 4 obs

● 2015-08-06 03:51:56
● 2018-09-11 18:52:52
○ 2026-04-03 06:40:14
○ 2026-06-13 07:36:02

●NSns1.amphora.sui-inter.net2026-04-03 → 2026-06-13 · 3 obs

○ 2018-09-11 18:52:52
● 2026-04-03 06:40:14
● 2026-06-13 07:36:02

●NSns2.amphora.sui-inter.net2026-04-03 → 2026-06-13 · 3 obs

○ 2018-09-11 18:52:52
● 2026-04-03 06:40:14
● 2026-06-13 07:36:02

○NSns2.ch-inter.net2015-08-06 → 2018-09-11 · 4 obs

● 2015-08-06 03:51:56
● 2018-09-11 18:52:52
○ 2026-04-03 06:40:14
○ 2026-06-13 07:36:02

●MXmail.java4u.ch2015-08-06 → 2026-06-13 · 2 obs

● 2015-08-06 03:51:56
● 2026-06-13 07:36:02

●A80.74.147.332015-08-06 → 2026-06-13 · 2 obs

● 2015-08-06 03:51:56
● 2026-06-13 07:36:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ch	e.nic.ch, f.nic.ch, a.nic.ch, b.nic.ch...	-
java4u.ch	ns2.amphora.sui-inter.net, ns1.amphora.sui-inter.net	-

✅ Authoritative Response

Server:80.74.147.33

NS records: ns2.amphora.sui-inter.net, ns1.amphora.sui-inter.net

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

DS for java4u.ch does not match any DNSKEY

⏱️ Timing

Total: 855ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`80.74.147.33`
NS	2	`ns1.amphora.sui-inter.net, ns2.amphora.sui-inter.net`
MX	1	`mail.java4u.ch (pri: 10)`
TXT	1	`v=spf1 include:_spf.sui-inter.net +mx +a`
SOA	1	`ns1.amphora.sui-inter.net daniel\.sterch`

Analysis

Hierarchy

mail.java4u.ch is a subdomain of java4u.ch.

IP Addresses

java4u.ch resolves to just one IP address, 80.74.147.33.

Two other host names, along with openup.ru, planetcar.ch and mail.isc-engelberg.ch, also share IP numbers with java4u.ch.

Name Servers

The NS records for java4u.ch delegate to ns1.amphora.sui-inter.net and ns2.amphora.sui-inter.net.

java4u.ch shares its NS records with other domains, for example rompen.ch, i-sam.ch, beyer-chronometrie.com and two others.

The name servers of java4u.ch overlap at least partially with those of other domains — among them demozone.ch, ganderevent.ch, mattiussi.ch and two more.

ns1.amphora.sui-inter.net resolves to 80.74.147.33 and 2a00:1128:1:1::147:33. Likewise, ns2.amphora.sui-inter.net resolves to 46.231.201.112 and 2a00:1128:0:201:2::112 — two IP addresses apiece.

Mail Servers

The sole mail server for java4u.ch is mail.java4u.ch.

mail.java4u.ch resolves to 80.74.147.33 and no other IP number.

java4u.ch - robtex.com

java4u.ch

ch