`sidlaboratory.com`

DNSSEC	🔒 Signed (DS record present)
A	76.76.21.21^{🇺🇸 Amazon76.76.21.0/24 EC2 Prefix}
NS	`ns1.websupport.cz` ⭐
		A	2a10:bbc0::11^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns1.websupport.eu`
		A	45.10.97.11^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns1.websupport.eu`
NS	`ns2.websupport.cz`
		A	2a02:250:3::12^{🇸🇪 ACTIVE24-AS2a02:250:3::/48}
			PTR	`ns2.websupport.eu`
		A	185.71.159.12^{🇸🇪 ACTIVE24-AS185.71.159.0/24}
			PTR	`ns2.websupport.eu`
NS	`ns3.websupport.eu`
		A	2a10:bbc0::13^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns3.websupport.eu`
		A	45.10.97.13^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns3.websupport.eu`
MX	`mx10.active24.cz` ⭐
		A	2a00:4b40:aaaa:2101:45:13:137:85^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
		A	45.13.137.85^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`mx10.active24.cz`
MX	`mx20.active24.cz`⁽¹⁰⁰⁾
		A	2a00:4b40:aaaa:2101:45:13:137:86^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
		A	45.13.137.86^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`mx20.active24.cz`
TXT	`v=spf1 a mx include:_spf.websupport.cz ?all`
TXT	`spf2.0/pra a mx include:_sid.websupport.cz ?all`
SOA	`ns1.websupport.cz`admin@websupport.cz serial=1782706752

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785327412

Same first word

sidlaboratory.com

DNS History

6 records (6 active, 0 former)

●NSns1.websupport.cz2026-02-18 → 2026-07-29 · 2 obs

● 2026-02-18 06:33:42
● 2026-07-29 12:26:20

●NSns2.websupport.cz2026-02-18 → 2026-07-29 · 2 obs

● 2026-02-18 06:33:42
● 2026-07-29 12:26:20

●NSns3.websupport.eu2026-02-18 → 2026-07-29 · 2 obs

● 2026-02-18 06:33:42
● 2026-07-29 12:26:20

●MXmx10.active24.cz2026-02-18 → 2026-07-29 · 2 obs

● 2026-02-18 06:33:42
● 2026-07-29 12:26:20

●MXmx20.active24.cz2026-02-18 → 2026-07-29 · 2 obs

● 2026-02-18 06:33:42
● 2026-07-29 12:26:20

●A76.76.21.212026-02-18 → 2026-07-29 · 2 obs

● 2026-02-18 06:33:42
● 2026-07-29 12:26:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
sidlaboratory.com	ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu	-

✅ Authoritative Response

Server:185.71.159.12

NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 675ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`76.76.21.21`
NS	3	`ns1.websupport.cz, ns2.websupport.cz...`
MX	2	`mx10.active24.cz (pri: 10), mx20.active24.cz (pri: 100)`
TXT	2	`v=spf1 a mx include:_spf.websupport.cz ?, spf2.0/pra a mx include:_sid.websupport.`
SOA	1	`ns1.websupport.cz admin.websupport.cz`

Analysis

IP Addresses

sidlaboratory.com has exactly one IP address — 76.76.21.21.

assembleurs.co, claude-sender-identity-support-avocado.socialreels.ai, net.bluefrog.com plus two other host names have IP numbers in common with sidlaboratory.com.

Name Servers

Three name servers are authoritative for sidlaboratory.com: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.

At least some of sidlaboratory.com's name servers are shared with other domains, for example t-rail.cz, jrbpoter.eu, akvh.cz and two more.

ns1.websupport.cz resolves to 45.10.97.11 and 2a10:bbc0::11. ns2.websupport.cz resolves to 185.71.159.12 and 2a02:250:3::12. ns3.websupport.eu resolves to 45.10.97.13 and 2a10:bbc0::13. All three hostnames point to two IP numbers each.

Mail Servers

sidlaboratory.com uses two mail servers, mx10.active24.cz and mx20.active24.cz.

The mail server setup of sidlaboratory.com matches that of other domains such as cihc.cz, agrometall.cz, polaroide.com and two others.

sidlaboratory.com overlaps on mail servers with certain other domains, aperto.cz among them.

Each of the two host names carries two IP addresses: mx10.active24.cz points to 45.13.137.85 and 2a00:4b40:aaaa:2101:45:13:137:85, and mx20.active24.cz points to 45.13.137.86 and 2a00:4b40:aaaa:2101:45:13:137:86.

sidlaboratory.com - robtex.com