by-u.fr - robtex.com

by-u.fr

DNSSEC⚠️ Not signed
NSns1.gandi.net ⭐
A2001:4b98:aaaa::2🇫🇷 GANDI-LIVEDNS2001:4b98:aaaa::/48 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-1-a.gandi.net
A173.246.100.2🇺🇸 GANDI-LIVEDNS173.246.100.0/24 Gandi LiveDNS A
PTRns-1-a.gandi.net
NSns-235-c.gandi.net
A2604:3400:aaac::ec🇺🇸 GANDI-LIVEDNS2604:3400:aaac::/48 Gandi US Inc.
PTRns-235-c.gandi.net
A217.70.187.236🇫🇷 GANDI-LIVEDNS217.70.187.0/24 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-235-c.gandi.net
NSns-251-a.gandi.net
A2001:4b98:aaaa::fc🇫🇷 GANDI-LIVEDNS2001:4b98:aaaa::/48 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-251-a.gandi.net
A173.246.100.252🇺🇸 GANDI-LIVEDNS173.246.100.0/24 Gandi LiveDNS A
PTRns-251-a.gandi.net
NSns-37-b.gandi.net
A2001:4b98:aaab::26🇫🇷 GANDI-LIVEDNS2001:4b98:aaab::/48 GANDI is an ICANN accredited registrar GANDI is a virtual server provider for more information: Web: http://www.gandi.net
PTRns-37-b.gandi.net
A213.167.230.38🇫🇷 GANDI-LIVEDNS213.167.230.0/24 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-37-b.gandi.net
MXmail.by-u.fr ⭐
A213.41.66.182🇫🇷 COLT213.41.0.0/17 FR-COLT-FRANCE
PTRsystemeu-bdsystu2.legato.coltfrance.com
SOAns1.gandi.nethostmaster@gandi.net serial=1776902400

fr

DNSSEC🔒 Signed (DS record present)
NSa.nic.fr ⭐
NSd.nic.fr
NSf.ext.nic.fr
NSg.ext.nic.fr
TXT96 RRs processed [24/04/2026 21H30:49]
SOAa.nic.frdnsmaster@afnic.fr serial=2244920881

Subdomains

mail.by-u.fr

Same first word

by-u.at
by-u.fr
by-u.tv

Similar names

bu-y.net
b-yu.com
b-uy.com

DNS History

10 records (5 active, 5 former)

20162017201820192020202120222023202420252026NSns-235-c.gandi.netns-251-a.gandi.netns-37-b.gandi.netns1.gandi.netns1.rrpproxy.netns2.rrpproxy.netns3.rrpproxy.netMXmail.by-u.frA109.234.109.215137.74.127.233
●NSns-235-c.gandi.net2026-03-28 → 2026-04-24 · 3 obs
○ 2017-09-21 16:20:22
● 2026-03-28 12:25:38
● 2026-04-24 21:49:18
●NSns-251-a.gandi.net2026-03-28 → 2026-04-24 · 3 obs
○ 2017-09-21 16:20:22
● 2026-03-28 12:25:38
● 2026-04-24 21:49:18
●NSns-37-b.gandi.net2026-03-28 → 2026-04-24 · 3 obs
○ 2017-09-21 16:20:22
● 2026-03-28 12:25:38
● 2026-04-24 21:49:18
●NSns1.gandi.net2026-03-28 → 2026-04-24 · 3 obs
○ 2017-09-21 16:20:22
● 2026-03-28 12:25:38
● 2026-04-24 21:49:18
○NSns1.rrpproxy.net2015-07-10 → 2017-09-21 · 4 obs
● 2015-07-10 06:43:42
● 2017-09-21 16:20:22
○ 2026-03-28 12:25:38
○ 2026-04-24 21:49:18
○NSns2.rrpproxy.net2015-07-10 → 2017-09-21 · 4 obs
● 2015-07-10 06:43:42
● 2017-09-21 16:20:22
○ 2026-03-28 12:25:38
○ 2026-04-24 21:49:18
○NSns3.rrpproxy.net2015-07-10 → 2017-09-21 · 4 obs
● 2015-07-10 06:43:42
● 2017-09-21 16:20:22
○ 2026-03-28 12:25:38
○ 2026-04-24 21:49:18
●MXmail.by-u.fr2015-07-10 → 2026-04-24 · 2 obs
● 2015-07-10 06:43:42
● 2026-04-24 21:49:18
○A109.234.109.2152015-07-10 → 2016-09-04 · 4 obs
● 2015-07-10 06:43:42
● 2016-09-04 10:37:18
○ 2016-12-31 20:31:38
○ 2026-04-24 21:49:18
○A137.74.127.2332016-12-31 → 2017-09-21 · 5 obs
○ 2016-09-04 10:37:18
● 2016-12-31 20:31:38
● 2017-09-21 16:20:22
○ 2026-03-28 12:25:38
○ 2026-04-24 21:49:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
frd.nic.fr, f.ext.nic.fr, g.ext.nic.fr-
by-u.frns-37-b.gandi.net, ns-251-a.gandi.net, ns-235-c.gandi.net-

✅ Authoritative Response

Server:217.70.187.236

NS records: ns-37-b.gandi.net, ns-251-a.gandi.net, ns-235-c.gandi.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for by-u.fr (unsigned zone)

⏱️ Timing

Total: 2199ms | Queries: -

📄 Records

TypeCountSample Data
NS3ns-37-b.gandi.net, ns-235-c.gandi.net...
MX1mail.by-u.fr (pri: 10)
SOA1ns1.gandi.net hostmaster.gandi.net

Analysis

Hierarchy

The parent of mail.by-u.fr is by-u.fr.

Name Servers

by-u.fr is delegated to four name servers: ns-235-c.gandi.net, ns-251-a.gandi.net, ns-37-b.gandi.net and ns1.gandi.net.

by-u.fr shares name servers with other domains at least partially, for instance niviz.net, manley.fr, northernconstruction.ca, atelier-c.fr and pjtraitement.com.

these name servers are commonly paired with ns-243-c.gandi.net, ns-11-a.gandi.net, ns-222-c.gandi.net, ns-186-a.gandi.net, ns-193-a.gandi.net, ns-213-c.gandi.net, ns-248-b.gandi.net, ns-36-b.gandi.net and ns-154-b.gandi.net.

Host names with two IP numbers:

ns-235-c.gandi.net resolves to 2604:3400:aaac::ec and 217.70.187.236.

ns-251-a.gandi.net resolves to 2001:4b98:aaaa::fc and 173.246.100.252.

ns-37-b.gandi.net resolves to 2001:4b98:aaab::26 and 213.167.230.38.

ns1.gandi.net resolves to 2001:4b98:aaaa::2 and 173.246.100.2.

Mail Servers

The mail server for by-u.fr is mail.by-u.fr.

Host name mail.by-u.fr resolves to IP 213.41.66.182.