upskill.dev - dns.ninja

`upskill.dev`

DNSSEC	⚠️ Not signed
A	188.172.236.218^{🇦🇹 ANEXIA188.172.236.0/22 Anexia AT-1060 Vienna}
NS	`acns02.xaas.systems` ⭐
		A	2a05:8900:aa1::1^{🇦🇹 ANX-CLOUDDNS2a05:8900:aa1::/48 Anexia ANYCAST}
			PTR	`acns02.xaas.systems`
		A	188.172.248.1^{🇧🇷 ANX-CLOUDDNS188.172.248.0/24 Anexia ANYCAST}
			PTR	`acns02.xaas.systems`
NS	`tv-ns1.teamviewer.com`
		A	2a00:11c0:aa1::1^{🇦🇹 ANX-CLOUDDNS2a00:11c0:aa1::/48 Anexia ANYCAST}
			PTR	`acns01.xaas.systems`
		A	217.146.18.1^{🇦🇹 ANX-CLOUDDNS217.146.18.0/24 Anexia ANYCAST}
			PTR	`acns01.xaas.systems`
NS	`tv-ns2.teamviewer.com`
		A	2a05:8900:aa1::1^{🇦🇹 ANX-CLOUDDNS2a05:8900:aa1::/48 Anexia ANYCAST}
			PTR	`acns02.xaas.systems`
		A	188.172.248.1^{🇧🇷 ANX-CLOUDDNS188.172.248.0/24 Anexia ANYCAST}
			PTR	`acns02.xaas.systems`
NS	`tv-ns3.teamviewer.com`
		A	2605:380:aa1::1^{🇺🇸 ANX-CLOUDDNS2605:380:aa1::/48 ANEXIA ANYCAST Services ANEXIA, Inc.}
			PTR	`acns03.xaas.systems`
		A	213.227.160.1^{🇦🇹 ANX-CLOUDDNS213.227.160.0/24 Anexia ANYCAST}
			PTR	`acns03.xaas.systems`
NS	`tv-ns4.teamviewer.com`
		A	2803:ad80:aa1::1^{🇵🇦 ANX-CLOUDDNS2803:ad80:aa1::/48 Proxy route}
			PTR	`acns04.xaas.systems`
		A	213.227.191.1^{🇦🇹 ANX-CLOUDDNS213.227.191.0/24 Anexia ANYCAST}
			PTR	`acns04.xaas.systems`
NS	`tv-ns5.teamviewer.com`
		A	2a00:11c0:1010::1^{🇦🇹 ANX-CLOUDDNS2a00:11c0:1010::/48 Anexia ANYCAST}
			PTR	`acns05.xaas.systems`
		A	185.81.208.1^{🇦🇹 ANX-CLOUDDNS185.81.208.0/24 Anexia ANYCAST}
			PTR	`acns05.xaas.systems`
TXT	`v=spf1 -all`
SOA	`acns02.xaas.systems`hostmaster@teamviewer.com serial=12

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Same first word

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DNS History

7 records (7 active, 0 former)

●NSacns02.xaas.systems2026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

●NStv-ns1.teamviewer.com2026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

●NStv-ns2.teamviewer.com2026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

●NStv-ns3.teamviewer.com2026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

●NStv-ns4.teamviewer.com2026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

●NStv-ns5.teamviewer.com2026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

●A188.172.236.2182026-03-07 → 2026-07-05 · 2 obs

● 2026-03-07 00:28:56
● 2026-07-05 07:14:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	-
upskill.dev	tv-ns1.teamviewer.com, tv-ns4.teamviewer.com, tv-ns2.teamviewer.com, tv-ns3.teamviewer.com...	-

✅ Authoritative Response

Server:213.227.160.1

NS records: tv-ns1.teamviewer.com, tv-ns4.teamviewer.com, tv-ns2.teamviewer.com, tv-ns3.teamviewer.com, tv-ns5.teamviewer.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for upskill.dev (unsigned zone)

⏱️ Timing

Total: 611ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`188.172.236.218`
NS	5	`tv-ns4.teamviewer.com, tv-ns5.teamviewer.com...`
MX	1	`. (pri: 0)`
TXT	1	`v=spf1 -all`
SOA	1	`acns02.xaas.systems hostmaster.teamviewe`

Analysis

IP Addresses

upskill.dev has exactly one IP address — 188.172.236.218.

xinspect.org, www.viscopic.com, teamviewer.earth plus two other host names have IP numbers in common with upskill.dev.

Name Servers

DNS for upskill.dev is handled by 6 name servers: tv-ns1.teamviewer.com, tv-ns2.teamviewer.com, tv-ns3.teamviewer.com and 3 others.

upskill.dev has at least partial name server overlap with other domains, such as apx-labs.com, teamviewer.cl, 166.227.213.in-addr.arpa and two others.

tv-ns4.teamviewer.com, tv-ns5.teamviewer.com and acns01.xaas.systems — plus 4 other name servers — are commonly paired with these name servers.

Host names pointing to two IP addresses:

tv-ns1.teamviewer.com has two IP addresses: 217.146.18.1 and 2a00:11c0:aa1::1.

tv-ns2.teamviewer.com has two IP addresses: 188.172.248.1 and 2a05:8900:aa1::1.

tv-ns3.teamviewer.com has two IP addresses: 213.227.160.1 and 2605:380:aa1::1.

tv-ns4.teamviewer.com has two IP addresses: 213.227.191.1 and 2803:ad80:aa1::1.

tv-ns5.teamviewer.com has two IP addresses: 185.81.208.1 and 2a00:11c0:1010::1.

acns02.xaas.systems has two IP addresses: 188.172.248.1 and 2a05:8900:aa1::1.

Host names pointing to 2a05:8900:aa1::1 IP addresses: tv-ns2.teamviewer.com and acns02.xaas.systems.

Host names pointing to 188.172.248.1 IP addresses: tv-ns2.teamviewer.com and acns02.xaas.systems.