github.is-a.dev - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`github.is-a.dev`

DNSSEC	⚠️ Not signed
A	2606:4700::6812:467^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700::6812:567^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.4.103^{Cloudflare104.18.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.5.103^{Cloudflare104.18.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.18.4.103, 104.18.5.103
		IPv6 hints	2606:4700::6812:467, 2606:4700::6812:567

`is-a.dev`

	DNSSEC	⚠️ Not signed
	A	2606:50c0:8000::153^{🇺🇸 Fastly2606:50c0:8000::/48 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8001::153^{🇺🇸 Fastly2606:50c0:8001::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8002::153^{🇺🇸 Fastly2606:50c0:8002::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	2606:50c0:8003::153^{🇺🇸 Fastly2606:50c0:8003::/48 + 88 Colin P Kelly Jr Street San Francisco CA 94107 United States}
	A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
	A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
	A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
	A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}
	NS	`ns1.is-a.dev` ⭐
	NS	`ns2.is-a.dev`
	NS	`ns3.is-a.dev`
	NS	`ns4.is-a.dev`
	MX	`route1.mx.cloudflare.net` ⭐
	MX	`route3.mx.cloudflare.net`⁽³⁶⁾
	MX	`route2.mx.cloudflare.net`⁽⁶²⁾
	TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
	SOA	`ns1.is-a.dev`dns@cloudflare.com serial=2413582326

rank #89848 globally
rank #89 in the tld

is-a.dev

is-a.dev is a free service that lets developers claim a personalized subdomain (e.g.yourname.is-a.dev) by submitting a pull request to a public GitHub repository. It is run as an open-source, community-driven project rather than a commercial company.

Key facts

Owner / operator: is-a.dev project maintainers (open-source community, hosted via GitHub)
TLD:.dev— gTLD (Google-operated, HSTS-preloaded)
Primary purpose: free subdomain hosting/registration for developer projects and personal sites
Status: active

Notable subdomains or services

yourname.is-a.dev— custom subdomains issued to individual users/projects via GitHub pull request, typically pointed at personal sites, portfolios, or other hosting services

📈 Tranco rank: #118,080

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DNS History

4 records (4 active, 0 former)

●A104.18.4.1032026-08-28 → 2026-08-30 · 2 obs

● 2026-08-28 10:37:56
● 2026-08-30 13:41:46

●A104.18.5.1032026-08-28 → 2026-08-30 · 2 obs

● 2026-08-28 10:37:56
● 2026-08-30 13:41:46

●A2606:4700::6812:4672026-08-28 → 2026-08-30 · 2 obs

● 2026-08-28 10:37:56
● 2026-08-30 13:41:46

●A2606:4700::6812:5672026-08-28 → 2026-08-30 · 2 obs

● 2026-08-28 10:37:56
● 2026-08-30 13:41:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	10 records
is-a.dev	ns2.is-a.dev, ns1.is-a.dev, ns3.is-a.dev, ns4.is-a.dev	8 records

✅ Authoritative Response

Server:162.159.4.237

NS records: ns2.is-a.dev, ns1.is-a.dev, ns3.is-a.dev, ns4.is-a.dev

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 453ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.18.5.103, 104.18.4.103`
AAAA	2	`2606:4700::6812:467, 2606:4700::6812:567`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

📌 Glue Records Collected

Total: 18

In-bailiwick: 8 (ns2.is-a.dev, ns2.is-a.dev, ns1.is-a.dev...)

Out-of-bailiwick: 10 (ns-tld5.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...)

Analysis

IP Addresses

github.is-a.dev has four IP addresses: 104.18.4.103, 104.18.5.103, 2606:4700::6812:467 and 2606:4700::6812:567.

Additional host names — bearingburdens.com, muhammadabdullah.is-a.dev, leo.is-a.dev and two others — share IP numbers with github.is-a.dev.