byfiber.dk - robtex.com

byfiber.dk

DNSSEC⚠️ Not signed
A193.104.135.126🇩🇰 FIBERBY193.104.135.0/24 Fiberby
PTRweb1.fiberby.net
NSauthns1.fiberby.net ⭐
A2a03:5440:0:102::53🇩🇰 FIBERBY2a03:5440::/29 Fiberby IPv6
PTRauthns1.fiberby.net
A193.104.135.46🇩🇰 FIBERBY193.104.135.0/24 Fiberby
PTRauthns1.fiberby.net
NSauthns2.fiberby.net
A2a03:5440:0:202::53🇩🇰 FIBERBY2a03:5440::/29 Fiberby IPv6
PTRauthns2.fiberby.net
A193.104.135.50🇩🇰 FIBERBY193.104.135.0/24 Fiberby
PTRauthns2.fiberby.net
NSauthns3.fiberby.net
A2a03:5440:0:302::53🇩🇰 FIBERBY2a03:5440::/29 Fiberby IPv6
PTRauthns3.fiberby.net
A193.104.135.54🇩🇰 FIBERBY193.104.135.0/24 Fiberby
PTRauthns3.fiberby.net
NSauthns4.fiberby.net
A2001:1af8:4700:a134:23::53🇳🇱 LEASEWEB-NL-AMS-012001:1af8::/32 NL-LEASEWEB-20040408 Leaseweb
PTRauthns4.fiberby.net
A5.79.113.128🇳🇱 LEASEWEB-NL-AMS-015.79.64.0/18 LEASEWEB
PTRauthns4.fiberby.net
MXmail.fiberby.dk ⭐
SOAauthns1.fiberby.nethostmaster@fiberby.net 2025-09-03 #0

dk

DNSSEC🔒 Signed (DS record present)
NSb.nic.dk ⭐
NSc.nic.dk
NSh.nic.dk
NSl.nic.dk
NSs.nic.dk
NSt.nic.dk
TXTDK zone updateEpoch 1774660141localtime Sat Mar 28 02:09:01 2026gmtime Sat Ma...
SOAb.nic.dktech@punktum.dk serial=1774660141

Subdomains

mail.byfiber.dk

Same first word

byfiber.net
byfiber.no
byfiber.dk

Similar names

fiberby.com
berbify.com
fiberby.dk
fiberby.net

DNS History

18 records (6 active, 12 former)

200920112013201520172019202120232025NSauthns1.fiberby.netauthns2.fiberby.netauthns3.fiberby.netauthns4.fiberby.netauthns1.fiberby.dkauthns2.fiberby.dkauthns3.fiberby.dkns1.gratisdns.dkns2.gratisdns.dkns3.gratisdns.dkns4.gratisdns.dkns5.gratisdns.dkMXmail.fiberby.dkmail.byfiber.dkA193.104.135.126193.104.135.2072a03:5440:1010::8087.48.149.6
○NSauthns1.fiberby.dk2015-07-15 → 2020-01-08 · 5 obs
○ 2008-11-23 00:51:26
● 2015-07-15 05:15:16
● 2020-01-08 21:44:44
○ 2026-03-13 07:17:56
○ 2026-03-28 01:22:28
●NSauthns1.fiberby.net2026-03-13 → 2026-03-28 · 3 obs
○ 2020-01-08 21:44:44
● 2026-03-13 07:17:56
● 2026-03-28 01:22:28
○NSauthns2.fiberby.dk2015-07-15 → 2020-01-08 · 5 obs
○ 2008-11-23 00:51:26
● 2015-07-15 05:15:16
● 2020-01-08 21:44:44
○ 2026-03-13 07:17:56
○ 2026-03-28 01:22:28
●NSauthns2.fiberby.net2026-03-13 → 2026-03-28 · 3 obs
○ 2020-01-08 21:44:44
● 2026-03-13 07:17:56
● 2026-03-28 01:22:28
○NSauthns3.fiberby.dk2015-07-15 → 2020-01-08 · 5 obs
○ 2008-11-23 00:51:26
● 2015-07-15 05:15:16
● 2020-01-08 21:44:44
○ 2026-03-13 07:17:56
○ 2026-03-28 01:22:28
●NSauthns3.fiberby.net2026-03-13 → 2026-03-28 · 3 obs
○ 2020-01-08 21:44:44
● 2026-03-13 07:17:56
● 2026-03-28 01:22:28
●NSauthns4.fiberby.net2026-03-13 → 2026-03-28 · 3 obs
○ 2020-01-08 21:44:44
● 2026-03-13 07:17:56
● 2026-03-28 01:22:28
○NSns1.gratisdns.dk2008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28
○NSns2.gratisdns.dk2008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28
○NSns3.gratisdns.dk2008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28
○NSns4.gratisdns.dk2008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28
○NSns5.gratisdns.dk2008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28
○MXmail.byfiber.dk2008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28
●MXmail.fiberby.dk2015-07-15 → 2026-03-28 · 3 obs
○ 2008-11-23 00:51:26
● 2015-07-15 05:15:16
● 2026-03-28 01:22:28
●A193.104.135.1262016-02-11 → 2026-03-28 · 3 obs
○ 2015-11-12 19:29:54
● 2016-02-11 13:53:12
● 2026-03-28 01:22:28
○A193.104.135.2072015-07-15 → 2015-11-12 · 5 obs
○ 2008-11-23 00:51:26
● 2015-07-15 05:15:16
● 2015-11-12 19:29:54
○ 2016-02-11 13:53:12
○ 2026-03-28 01:22:28
○A2a03:5440:1010::802015-07-15 → 2015-11-12 · 5 obs
○ 2008-11-23 00:51:26
● 2015-07-15 05:15:16
● 2015-11-12 19:29:54
○ 2016-02-11 13:53:12
○ 2026-03-28 01:22:28
○A87.48.149.62008-11-23 → 2008-11-23 · 3 obs
● 2008-11-23 00:51:26
○ 2015-07-15 05:15:16
○ 2026-03-28 01:22:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dkb.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...-
byfiber.dkauthns3.fiberby.net, authns2.fiberby.net, authns1.fiberby.net, authns4.fiberby.net-

✅ Authoritative Response

Server:193.104.135.50

NS records: authns3.fiberby.net, authns2.fiberby.net, authns1.fiberby.net, authns4.fiberby.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for byfiber.dk (unsigned zone)

⏱️ Timing

Total: 1056ms | Queries: -

📄 Records

TypeCountSample Data
A1193.104.135.126
NS4authns3.fiberby.net, authns4.fiberby.net...
MX1mail.fiberby.dk (pri: 10)
SOA1authns1.fiberby.net hostmaster.fiberby.n

Analysis

Hierarchy

mail.byfiber.dk has byfiber.dk as its parent.

IP Addresses

byfiber.dk maps to IP address 193.104.135.126.

Other host names, for example metrofiber.dk, web1.fiberby.net and fibercity.dk share the same IP as byfiber.dk.

Name Servers

byfiber.dk is delegated to four name servers: authns1.fiberby.net, authns2.fiberby.net, authns3.fiberby.net and authns4.fiberby.net.

byfiber.dk at least partially shares name servers with other domains such as 235.23.89.in-addr.arpa, 167.106.193.in-addr.arpa, 236.23.89.in-addr.arpa, 232.23.89.in-addr.arpa and 224.23.89.in-addr.arpa.

These name servers are commonly used alongside ns1.fiberby.dk, ns2.fiberby.dk and ns3.fiberby.dk.

Host names with two IP numbers:

authns1.fiberby.net points to 2a03:5440:0:102::53 and 193.104.135.46

authns2.fiberby.net points to 2a03:5440:0:202::53 and 193.104.135.50

authns3.fiberby.net points to 2a03:5440:0:302::53 and 193.104.135.54

authns4.fiberby.net points to 2001:1af8:4700:a134:23::53 and 5.79.113.128

Mail Servers

byfiber.dk is handled by a single mail server, mail.fiberby.dk.

byfiber.dk uses the same mail server setup as other domains, for instance fibercity.dk and metrofiber.dk.