`bertw.se`

DNSSEC	🔒 Signed (DS record present)
A	2a02:2350:5:10c:80b8:c067:3da0:3afe^{🇩🇰 ONECOM2a02:2350::/32 One.com A/S}
A	46.30.213.183^{🇩🇰 ONECOM46.30.208.0/21 One.com A/S}
NS	`ns01.one.com` ⭐
		A	2001:67c:28cc::10^{ONECOM-INFRA2001:67c:28cc::/48}
			PTR	`ns01.one.com`
		A	195.206.121.10^{ONECOM-INFRA195.206.121.0/24}
			PTR	`ns01.one.com`
NS	`ns02.one.com`
		A	2001:67c:3c0::10^{🇩🇰 ONECOM2001:67c:3c0::/48}
			PTR	`ns02.one.com`
		A	185.10.11.10^{ONECOM185.10.11.0/24}
			PTR	`ns02.one.com`
SOA	`ns01.one.com`hostmaster@one.com 2026-03-05 #1

`se`

	DNSSEC	🔒 Signed (DS record present)
	NS	`catcher-in-the-rye.nic.se` ⭐
	NS	`a.ns.se`
	NS	`b.ns.se` 🔒
	NS	`c.ns.se`
	NS	`f.ns.se`
	NS	`g.ns.se`
	NS	`i.ns.se`
	NS	`m.ns.se`
	NS	`x.ns.se` 🔒
	NS	`y.ns.se`
	NS	`z.ns.se`
	TXT	`id:8710dceb-6475-4a7a-9922-b9aa2f357914`
	TXT	`SE zone update: 2026-02-17 00:40:34 +0000 (EPOCH 1771288834) (auto)`
	SOA	`catcher-in-the-rye.nic.se`registry-default@nic.se serial=1771289391

Same first word

bertw.se

bertw.nl

bertw.com

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DNS History

8 records (4 active, 4 former)

●NSns01.one.com2015-05-27 → 2026-03-23 · 2 obs

● 2015-05-27 16:33:42
● 2026-03-23 03:54:50

●NSns02.one.com2015-05-27 → 2026-03-23 · 2 obs

● 2015-05-27 16:33:42
● 2026-03-23 03:54:50

○MXmxcluster1.one.com2015-05-27 → 2017-05-23 · 4 obs

● 2015-05-27 16:33:42
● 2017-05-23 06:47:16
○ 2026-03-06 19:20:08
○ 2026-03-23 03:54:50

○MXmxcluster2.one.com2015-05-27 → 2017-05-23 · 4 obs

● 2015-05-27 16:33:42
● 2017-05-23 06:47:16
○ 2026-03-06 19:20:08
○ 2026-03-23 03:54:50

●A2a02:2350:5:10c:80b8:c067:3da0:3afe2026-03-06 → 2026-03-23 · 3 obs

○ 2017-05-23 06:47:16
● 2026-03-06 19:20:08
● 2026-03-23 03:54:50

○A46.30.212.1112015-05-27 → 2016-09-18 · 4 obs

● 2015-05-27 16:33:42
● 2016-09-18 23:33:30
○ 2017-05-23 06:47:16
○ 2026-03-23 03:54:50

●A46.30.213.1832026-03-06 → 2026-03-23 · 3 obs

○ 2017-05-23 06:47:16
● 2026-03-06 19:20:08
● 2026-03-23 03:54:50

○A46.30.215.432017-05-23 → 2017-05-23 · 4 obs

○ 2016-09-18 23:33:30
● 2017-05-23 06:47:16
○ 2026-03-06 19:20:08
○ 2026-03-23 03:54:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
se	a.ns.se, b.ns.se, c.ns.se, f.ns.se...	-
bertw.se	ns01.one.com, ns02.one.com	-

✅ Authoritative Response

Server:185.10.11.10

NS records: ns01.one.com, ns02.one.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1083ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`46.30.213.183`
AAAA	1	`2a02:2350:5:10c:80b8:c067:3da0:3afe`
NS	2	`ns01.one.com, ns02.one.com`
MX	1	`. (pri: 0)`
SOA	1	`ns01.one.com hostmaster.one.com`

Analysis

IP Addresses

bertw.se points to two IPs: 2a02:2350:5:10c:80b8:c067:3da0:3afe and 46.30.213.183.

Other host names, for instance digpix.se, ghostship.dk, cs-photodesign.com, actora.nl and bylo.se share IP numbers with bertw.se.

Name Servers

Two name servers ns01.one.com and ns02.one.com are delegated to bertw.se.

bertw.se uses the same name server configuration as other domains, such as nissenenergiteknik.dk, omafiets.bike, espmark.com, pos-logistics.com and futuremed-sy.com.

bertw.se shares name servers with other domains at least partially, for instance castas.ch and encambio.com.

Host names with two IPs:

ns01.one.com points to 2001:67c:28cc::10 and 195.206.121.10.

ns02.one.com points to 2001:67c:3c0::10 and 185.10.11.10.

bertw.se - robtex.com

bertw.se

se