`521github.com`

DNSSEC	⚠️ Not signed
A	192.157.56.140^{🇺🇸 SERVER-MANIA192.157.56.0/22 B2Net Solutions}
NS	`ns1.brainydns.com` ⭐ ⚠️ Not in zone NS records
		A	23.19.67.18^{🇺🇸 LEASEWEB-USA-LAX-1123.19.64.0/20 Leaseweb USA, Inc.}
			PTR	`watchmanagement.net`
		A	64.120.31.81^{🇺🇸 LEASEWEB-USA-NYC-1164.120.28.0/22 Leaseweb USA, Inc.}
			PTR	`ip-64-120-31-81.defastlink.net`
		A	74.63.241.18^{🇺🇸 Limestone Networks74.63.192.0/18 Inc. 400 S. Akard Street Dallas, TX 75202 US =20}
			PTR	`18-241-63-74.static.reverse.lstn.net`
		A	192.157.56.138^{🇺🇸 SERVER-MANIA192.157.56.0/22 B2Net Solutions}
			PTR	`server.en.gs`
		A	199.115.116.161^{🇺🇸 LEASEWEB-US199.115.112.0/21 Leaseweb USA, Inc. US}
			PTR	`ip-199-115-116-161.defastlink.net`
		A	207.244.67.194^{🇺🇸 LEASEWEB-US207.244.64.0/18 Leaseweb USA, Inc. US}
			PTR	`ip-207-244-67-194.defastlink.net`
		A	208.115.247.67^{🇺🇸 Limestone Networks208.115.247.0/24}
			PTR	`67-247-115-208.static.reverse.lstn.net`
		A	216.245.197.162^{🇺🇸 Limestone Networks216.245.192.0/19 Inc. 400 S. Akard Street Dallas, TX 75202 US =20}
			PTR	`162-197-245-216.static.reverse.lstn.net`
NS	`ns1.emu-dns.com` ⚠️ Not in parent delegation
		A	64.120.31.81^{🇺🇸 LEASEWEB-USA-NYC-1164.120.28.0/22 Leaseweb USA, Inc.}
			PTR	`ip-64-120-31-81.defastlink.net`
NS	`ns2.brainydns.com` ⚠️ Not in zone NS records
		A	5.79.71.13^{🇳🇱 LEASEWEB-NL-AMS-015.79.64.0/18 LEASEWEB}
			PTR	`ip-5-79-71-13.defastlink.net`
		A	212.32.255.112^{🇳🇱 LEASEWEB-NL-AMS-01212.32.224.0/19}
			PTR	`ip-212-32-255-112.defastlink.net`
		A	212.92.104.1^{🇳🇱 NFORCE212.92.104.0/21 NFOrce Entertainment BV - route 212.92.104.0/21}
			PTR	`ip-212-92-104-1.defastlink.net`
		A	212.92.104.113^{🇳🇱 NFORCE212.92.104.0/21 NFOrce Entertainment BV - route 212.92.104.0/21}
			PTR	`ip-212-92-104-113.defastlink.net`
NS	`ns2.emu-dns.com` ⚠️ Not in parent delegation
		A	212.32.255.112^{🇳🇱 LEASEWEB-NL-AMS-01212.32.224.0/19}
			PTR	`ip-212-32-255-112.defastlink.net`
SOA	`ns1.brainydns.com`admin@521github.com 2026-02-09 #3

`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=1771291435

Same first word

521github.com

DNS History

7 records (5 active, 2 former)

●NSns1.brainydns.com2026-02-16 → 2026-02-24 · 2 obs

● 2026-02-16 09:19:12
● 2026-02-24 20:29:48

●NSns1.emu-dns.com2026-02-16 → 2026-02-24 · 4 obs

● 2026-02-16 09:19:12
○ 2026-02-18 08:32:04
● 2026-02-24 07:49:40
● 2026-02-24 20:29:48

●NSns2.brainydns.com2026-02-16 → 2026-02-24 · 2 obs

● 2026-02-16 09:19:12
● 2026-02-24 20:29:48

●NSns2.emu-dns.com2026-02-24 → 2026-02-24 · 3 obs

○ 2026-02-24 07:49:40
● 2026-02-24 14:15:44
● 2026-02-24 20:29:48

●A192.157.56.1402026-02-24 → 2026-02-24 · 5 obs

○ 2026-02-18 08:32:04
● 2026-02-24 07:49:40
○ 2026-02-24 14:15:44
● 2026-02-24 20:29:46
● 2026-02-24 20:29:48

○A192.157.56.1412026-02-16 → 2026-02-16 · 3 obs

● 2026-02-16 09:19:12
○ 2026-02-18 08:32:04
○ 2026-02-24 20:29:48

○A212.7.209.2152026-02-18 → 2026-02-24 · 6 obs

○ 2026-02-16 09:19:12
● 2026-02-18 08:32:04
○ 2026-02-24 07:49:40
● 2026-02-24 14:15:44
○ 2026-02-24 20:29:46
○ 2026-02-24 20:29:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
521github.com	ns1.brainydns.com, ns2.brainydns.com	8 records